[GIT PULL 00/15] perf/core improvements and fixes

[GIT PULL 00/15] perf/core improvements and fixes

[Arnaldo Carvalho de Melo]

Hi Ingo,

	Please consider pulling,

- Arnaldo

Test results at the end of this message, as usual.

The following changes since commit f2029b1e47b607619d1dd2cb0bbb77f64ec6b7c2:

  perf/x86/intel: Add Kaby Lake support (2017-02-11 21:28:23 +0100)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.11-20170213

for you to fetch changes up to a734fb5d60067a73dd7099a58756847c07f9cd68:

  samples/bpf: Reset global variables (2017-02-13 17:22:53 -0300)

----------------------------------------------------------------
perf/core improvements and fixes:

New feature:

- Introduce the 'delta-abs' 'perf diff' compute method, that orders the
  histogram entries by the absolute value of the percentage delta for a
  function in two perf.data files, i.e. the functions that changed the
  most (increase or decrease in samples) comes first (Namhyung Kim)

User visible:

- Improve message about tweaking the kernel.perf_event_paranoid setting,
  telling how to make the change permanent by editing /etc/sysctl.conf
  (Ingo Molnar)

Infrastructure:

- Introduce linux/compiler-gcc.h as a counterpart to the kernel's,
  initially containing the definition of __fallthrough, more to
  come (__maybe_unused, etc) (Arnaldo Carvalho de Melo)

- Fixes for problems uncovered by building tools/perf with clang, such
  as always true tests of arrays against NULL and variables that sometimes
  were used without being initialized (Arnaldo Carvalho de Melo, Steven Rostedt)

- Before loading a new ELF, clear global variables set by the
  samples/bpf loader (Mickaël Salaün)

- Ignore already processed ELF sections in the samples/bpf
  loader (Mickaël Salaün)

- Fix compile error in the scripting code with some perl5
  versions (Wang YanQing)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

----------------------------------------------------------------
Arnaldo Carvalho de Melo (6):
      tools include: Introduce linux/compiler-gcc.h
      tools lib traceevent plugin function: Initialize 'index' variable
      perf evsel: Inform how to make a sysctl setting permanent
      perf symbols: No need to check if sym->name is NULL
      perf tests record: No need to test an array against NULL
      perf symbols: dso->name is an array, no need to check it against NULL

Mickaël Salaün (3):
      samples/bpf: Add missing header
      samples/bpf: Ignore already processed ELF sections
      samples/bpf: Reset global variables

Namhyung Kim (4):
      perf diff: Add 'delta-abs' compute method
      perf diff: Add diff.order config option
      perf diff: Add diff.compute config option
      perf diff: Change default setting to "delta-abs"

Steven Rostedt (VMware) (1):
      tools lib traceevent: Initialize lenght on OLD_RING_BUFFER_TYPE_TIME_STAMP

Wang YanQing (1):
      perf scripting perl: Fix compile error with some perl5 versions

 samples/bpf/bpf_load.c                             |  7 ++
 samples/bpf/tracex5_kern.c                         |  1 +
 tools/include/linux/compiler-gcc.h                 | 14 ++++
 tools/include/linux/compiler.h                     | 10 +--
 tools/lib/traceevent/kbuffer-parse.c               |  1 +
 tools/lib/traceevent/plugin_function.c             |  2 +-
 tools/perf/Documentation/perf-config.txt           | 12 ++++
 tools/perf/Documentation/perf-diff.txt             | 15 ++++-
 tools/perf/MANIFEST                                |  1 +
 tools/perf/builtin-diff.c                          | 78 ++++++++++++++++++++--
 tools/perf/builtin-kmem.c                          |  4 +-
 tools/perf/builtin-record.c                        |  2 +-
 tools/perf/builtin-sched.c                         |  2 +-
 tools/perf/builtin-stat.c                          |  2 +-
 tools/perf/builtin-top.c                           |  2 +-
 tools/perf/tests/perf-record.c                     |  2 +-
 tools/perf/util/evsel.c                            |  4 +-
 tools/perf/util/evsel_fprintf.c                    |  1 -
 tools/perf/util/machine.c                          |  2 +-
 tools/perf/util/map.c                              |  4 +-
 tools/perf/util/scripting-engines/Build            |  2 +-
 .../perf/util/scripting-engines/trace-event-perl.c |  4 +-
 tools/perf/util/symbol_fprintf.c                   |  2 +-
 23 files changed, 145 insertions(+), 29 deletions(-)
 create mode 100644 tools/include/linux/compiler-gcc.h

Test results:

The first ones are container (docker) based builds of tools/perf with and
without libelf support, objtool where it is supported and samples/bpf/, ditto.

Several are cross builds, the ones with -x-ARCH, and the android one, and those
may not have all the features built, due to lack of multi-arch devel packages,
available and being used so far on just a few, like
debian:experimental-x-{arm64,mipsel}.

The 'perf test' one will perform a variety of tests exercising
tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf commands
with a variety of command line event specifications to then intercept the
sys_perf_event syscall to check that the perf_event_attr fields are set up as
expected, among a variety of other unit tests.

Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
with a variety of feature sets, exercising the build with an incomplete set of
features as well as with a complete one. It is planned to have it run on each
of the containers mentioned above, using some container orchestration
infrastructure. Get in contact if interested in helping having this in place.

  # time dm
   1 alpine:3.4: Ok
   2 android-ndk:r12b-arm: Ok
   3 archlinux:latest: Ok
   4 centos:5: Ok
   5 centos:6: Ok
   6 centos:7: Ok
   7 debian:7: Ok
   8 debian:8: Ok
   9 debian:experimental: Ok
  10 debian:experimental-x-arm64: Ok
  11 debian:experimental-x-mips: Ok
  12 debian:experimental-x-mips64: Ok
  13 debian:experimental-x-mipsel: Ok
  14 fedora:20: Ok
  15 fedora:21: Ok
  16 fedora:22: Ok
  17 fedora:23: Ok
  18 fedora:24: Ok
  19 fedora:24-x-ARC-uClibc: Ok
  20 fedora:25: Ok
  21 fedora:rawhide: Ok
  22 mageia:5: Ok
  23 opensuse:13.2: Ok
  24 opensuse:42.1: Ok
  25 opensuse:tumbleweed: Ok
  26 ubuntu:12.04.5: Ok
  27 ubuntu:14.04.4-x-linaro-arm64: Ok
  28 ubuntu:15.10: Ok
  29 ubuntu:16.04: Ok
  30 ubuntu:16.04-x-arm: Ok
  31 ubuntu:16.04-x-arm64: Ok
  32 ubuntu:16.04-x-powerpc: Ok
  33 ubuntu:16.04-x-powerpc64: Ok
  34 ubuntu:16.04-x-powerpc64el: Ok
  35 ubuntu:16.04-x-s390: Ok
  36 ubuntu:16.10: Ok
  #

  # uname -a
  Linux jouet 4.9.8-201.fc25.x86_64 #1 SMP Tue Feb 7 11:28:07 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
  # perf test
   1: vmlinux symtab matches kallsyms            : Ok
   2: Detect openat syscall event                : Ok
   3: Detect openat syscall event on all cpus    : Ok
   4: Read samples using the mmap interface      : Ok
   5: Parse event definition strings             : Ok
   6: PERF_RECORD_* events & perf_sample fields  : Ok
   7: Parse perf pmu format                      : Ok
   8: DSO data read                              : Ok
   9: DSO data cache                             : Ok
  10: DSO data reopen                            : Ok
  11: Roundtrip evsel->name                      : Ok
  12: Parse sched tracepoints fields             : Ok
  13: syscalls:sys_enter_openat event fields     : Ok
  14: Setup struct perf_event_attr               : Ok
  15: Match and link multiple hists              : Ok
  16: 'import perf' in python                    : Ok
  17: Breakpoint overflow signal handler         : Ok
  18: Breakpoint overflow sampling               : Ok
  19: Number of exit events of a simple workload : Ok
  20: Software clock events period values        : Ok
  21: Object code reading                        : Ok
  22: Sample parsing                             : Ok
  23: Use a dummy software event to keep tracking: Ok
  24: Parse with no sample_id_all bit set        : Ok
  25: Filter hist entries                        : Ok
  26: Lookup mmap thread                         : Ok
  27: Share thread mg                            : Ok
  28: Sort output of hist entries                : Ok
  29: Cumulate child hist entries                : Ok
  30: Track with sched_switch                    : Ok
  31: Filter fds with revents mask in a fdarray  : Ok
  32: Add fd to a fdarray, making it autogrow    : Ok
  33: kmod_path__parse                           : Ok
  34: Thread map                                 : Ok
  35: LLVM search and compile                    :
  35.1: Basic BPF llvm compile                    : Ok
  35.2: kbuild searching                          : Ok
  35.3: Compile source for BPF prologue generation: Ok
  35.4: Compile source for BPF relocation         : Ok
  36: Session topology                           : Ok
  37: BPF filter                                 :
  37.1: Basic BPF filtering                      : Ok
  37.2: BPF pinning                              : Ok
  37.3: BPF prologue generation                  : Ok
  37.4: BPF relocation checker                   : Ok
  38: Synthesize thread map                      : Ok
  39: Remove thread map                          : Ok
  40: Synthesize cpu map                         : Ok
  41: Synthesize stat config                     : Ok
  42: Synthesize stat                            : Ok
  43: Synthesize stat round                      : Ok
  44: Synthesize attr update                     : Ok
  45: Event times                                : Ok
  46: Read backward ring buffer                  : Ok
  47: Print cpu map                              : Ok
  48: Probe SDT events                           : Ok
  49: is_printable_array                         : Ok
  50: Print bitmap                               : Ok
  51: perf hooks                                 : Ok
  52: builtin clang support                      : Skip (not compiled in)
  53: unit_number__scnprintf                     : Ok
  54: x86 rdpmc                                  : Ok
  55: Convert perf time to TSC                   : Ok
  56: DWARF unwind                               : Ok
  57: x86 instruction decoder - new instructions : Ok
  58: Intel cqm nmi context read                 : Skip
  #

  $ make -C tools/perf build-test
  make: Entering directory '/home/acme/git/linux/tools/perf'
  - tarpkg: ./tests/perf-targz-src-pkg .
                make_install_O: make install
           make_no_libunwind_O: make NO_LIBUNWIND=1
                make_no_newt_O: make NO_NEWT=1
               make_no_slang_O: make NO_SLANG=1
                 make_static_O: make LDFLAGS=-static
           make_no_backtrace_O: make NO_BACKTRACE=1
           make_no_libbionic_O: make NO_LIBBIONIC=1
              make_clean_all_O: make clean all
       make_util_pmu_bison_o_O: make util/pmu-bison.o
             make_no_libnuma_O: make NO_LIBNUMA=1
                   make_tags_O: make tags
                  make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
  make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
                make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1
                 make_perf_o_O: make perf.o
   make_install_prefix_slash_O: make install prefix=/tmp/krava/
           make_no_libpython_O: make NO_LIBPYTHON=1
                make_no_gtk2_O: make NO_GTK2=1
            make_no_libaudit_O: make NO_LIBAUDIT=1
                   make_help_O: make help
        make_with_babeltrace_O: make LIBBABELTRACE=1
         make_install_prefix_O: make install prefix=/tmp/krava
                  make_debug_O: make DEBUG=1
              make_no_libbpf_O: make NO_LIBBPF=1
             make_util_map_o_O: make util/map.o
         make_with_clangllvm_O: make LIBCLANGLLVM=1
             make_no_libperl_O: make NO_LIBPERL=1
             make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
                    make_doc_O: make doc
              make_no_libelf_O: make NO_LIBELF=1
            make_no_auxtrace_O: make NO_AUXTRACE=1
            make_install_bin_O: make install-bin
            make_no_demangle_O: make NO_DEMANGLE=1
                   make_pure_O: make
  OK
  make: Leaving directory '/home/acme/git/linux/tools/perf'
  $

Re: [GIT PULL 00/15] perf/core improvements and fixes

[Ingo Molnar]

* Arnaldo Carvalho de Melo <acme@kernel.org> wrote:

> Hi Ingo,
> 
> 	Please consider pulling,
> 
> - Arnaldo
> 
> Test results at the end of this message, as usual.
> 
> The following changes since commit f2029b1e47b607619d1dd2cb0bbb77f64ec6b7c2:
> 
>   perf/x86/intel: Add Kaby Lake support (2017-02-11 21:28:23 +0100)
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.11-20170213
> 
> for you to fetch changes up to a734fb5d60067a73dd7099a58756847c07f9cd68:
> 
>   samples/bpf: Reset global variables (2017-02-13 17:22:53 -0300)
> 
> ----------------------------------------------------------------
> perf/core improvements and fixes:
> 
> New feature:
> 
> - Introduce the 'delta-abs' 'perf diff' compute method, that orders the
>   histogram entries by the absolute value of the percentage delta for a
>   function in two perf.data files, i.e. the functions that changed the
>   most (increase or decrease in samples) comes first (Namhyung Kim)
> 
> User visible:
> 
> - Improve message about tweaking the kernel.perf_event_paranoid setting,
>   telling how to make the change permanent by editing /etc/sysctl.conf
>   (Ingo Molnar)
> 
> Infrastructure:
> 
> - Introduce linux/compiler-gcc.h as a counterpart to the kernel's,
>   initially containing the definition of __fallthrough, more to
>   come (__maybe_unused, etc) (Arnaldo Carvalho de Melo)
> 
> - Fixes for problems uncovered by building tools/perf with clang, such
>   as always true tests of arrays against NULL and variables that sometimes
>   were used without being initialized (Arnaldo Carvalho de Melo, Steven Rostedt)
> 
> - Before loading a new ELF, clear global variables set by the
>   samples/bpf loader (Mickaël Salaün)
> 
> - Ignore already processed ELF sections in the samples/bpf
>   loader (Mickaël Salaün)
> 
> - Fix compile error in the scripting code with some perl5
>   versions (Wang YanQing)
> 
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> ----------------------------------------------------------------
> Arnaldo Carvalho de Melo (6):
>       tools include: Introduce linux/compiler-gcc.h
>       tools lib traceevent plugin function: Initialize 'index' variable
>       perf evsel: Inform how to make a sysctl setting permanent
>       perf symbols: No need to check if sym->name is NULL
>       perf tests record: No need to test an array against NULL
>       perf symbols: dso->name is an array, no need to check it against NULL
> 
> Mickaël Salaün (3):
>       samples/bpf: Add missing header
>       samples/bpf: Ignore already processed ELF sections
>       samples/bpf: Reset global variables
> 
> Namhyung Kim (4):
>       perf diff: Add 'delta-abs' compute method
>       perf diff: Add diff.order config option
>       perf diff: Add diff.compute config option
>       perf diff: Change default setting to "delta-abs"
> 
> Steven Rostedt (VMware) (1):
>       tools lib traceevent: Initialize lenght on OLD_RING_BUFFER_TYPE_TIME_STAMP
> 
> Wang YanQing (1):
>       perf scripting perl: Fix compile error with some perl5 versions
> 
>  samples/bpf/bpf_load.c                             |  7 ++
>  samples/bpf/tracex5_kern.c                         |  1 +
>  tools/include/linux/compiler-gcc.h                 | 14 ++++
>  tools/include/linux/compiler.h                     | 10 +--
>  tools/lib/traceevent/kbuffer-parse.c               |  1 +
>  tools/lib/traceevent/plugin_function.c             |  2 +-
>  tools/perf/Documentation/perf-config.txt           | 12 ++++
>  tools/perf/Documentation/perf-diff.txt             | 15 ++++-
>  tools/perf/MANIFEST                                |  1 +
>  tools/perf/builtin-diff.c                          | 78 ++++++++++++++++++++--
>  tools/perf/builtin-kmem.c                          |  4 +-
>  tools/perf/builtin-record.c                        |  2 +-
>  tools/perf/builtin-sched.c                         |  2 +-
>  tools/perf/builtin-stat.c                          |  2 +-
>  tools/perf/builtin-top.c                           |  2 +-
>  tools/perf/tests/perf-record.c                     |  2 +-
>  tools/perf/util/evsel.c                            |  4 +-
>  tools/perf/util/evsel_fprintf.c                    |  1 -
>  tools/perf/util/machine.c                          |  2 +-
>  tools/perf/util/map.c                              |  4 +-
>  tools/perf/util/scripting-engines/Build            |  2 +-
>  .../perf/util/scripting-engines/trace-event-perl.c |  4 +-
>  tools/perf/util/symbol_fprintf.c                   |  2 +-
>  23 files changed, 145 insertions(+), 29 deletions(-)
>  create mode 100644 tools/include/linux/compiler-gcc.h

Pulled, thanks a lot Arnaldo!

	Ingo

[GIT PULL 00/15] perf/core improvements and fixes

[Arnaldo Carvalho de Melo]

Hi Ingo,

	Please consider pulling,

- Arnaldo

Test results at the end of this message, as usual.

The following changes since commit ee438ec8f33c5af0d4a4ffb935c5b9272e8c2680:

  Merge tag 'perf-core-for-mingo-4.14-20170725' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (2017-07-26 19:07:30 +0200)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.14-20170728

for you to fetch changes up to 6b7007af728df7258bb60ed73099be3b59b3030e:

  perf data: Add doc when no conversion support compiled (2017-07-28 16:30:45 -0300)

----------------------------------------------------------------
perf/core improvements and fixes for 4.14:

New features:

- Add PERF_SAMPLE_CALLCHAIN and PERF_RECORD_MMAP[2] to 'perf data' CTF
  conversion, allowing CTF trace visualization tools to show callchains
  and to resolve symbols (Geneviève Bastien)

Improvements:

- Use group read for event groups in 'perf stat', reducing overhead when
  groups are defined in the event specification, i.e. when using {} to
  enclose a list of events, asking them to be read at the same time,
  e.g.: "perf stat -e '{cycles,instructions}'" (Jiri Olsa)

Fixes:

- Do not overwrite perf_sample->weight in 'perf annotate' when
  processing samples, use whatever came from the kernel when
  perf_event_attr.sample_type has PERF_SAMPLE_WEIGHT set or just handle
  its default value, 0, when that is not set and "weight" is one of the
  sort orders chosen (Arnaldo Carvalho de Melo)

- 'perf annotate --show-total-period' fixes:
   - TUI should show period, not nr_samples
   - Set appropriate column width for period/percent
   - Fix the column header to show "Period" when when that is what
     is being asked for
  (Taeung Song, Arnaldo Carvalho de Melo)

- Use default sort if evlist is empty, fixing pipe mode (David Carrillo-Cisneros)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

----------------------------------------------------------------
Arnaldo Carvalho de Melo (6):
      perf annotate: Do not overwrite perf_sample->weight
      perf annotate stdio: Set enough columns for --show-total-period
      perf annotate: Fix storing per line sym_hist_entry
      perf annotate TUI: Use sym_hist_entry in disasm_line_samples
      perf annotate TUI: Clarify calculation of column header widths
      perf annotate TUI: Set appropriate column width for period/percent

David Carrillo-Cisneros (1):
      perf sort: Use default sort if evlist is empty

Geneviève Bastien (3):
      perf data: Add callchain to CTF conversion
      perf data: Add mmap[2] events to CTF conversion
      perf data: Add doc when no conversion support compiled

Jiri Olsa (3):
      perf tools: Add perf_evsel__read_size function
      perf evsel: Add read_counter()
      perf stat: Use group read for event groups

Taeung Song (2):
      perf annotate TUI: Fix --show-total-period
      perf annotate TUI: Fix column header when toggling period/percent

 tools/perf/builtin-annotate.c     |   2 -
 tools/perf/builtin-data.c         |   2 +-
 tools/perf/builtin-stat.c         |  30 +++++++-
 tools/perf/ui/browsers/annotate.c |  36 +++++-----
 tools/perf/util/annotate.c        |  11 +--
 tools/perf/util/counts.h          |   1 +
 tools/perf/util/data-convert-bt.c | 127 +++++++++++++++++++++++++++++++++-
 tools/perf/util/evlist.h          |   5 ++
 tools/perf/util/evsel.c           | 139 +++++++++++++++++++++++++++++++++++++-
 tools/perf/util/evsel.h           |   2 +
 tools/perf/util/sort.c            |   2 +-
 tools/perf/util/stat.c            |   4 ++
 tools/perf/util/stat.h            |   5 +-
 13 files changed, 334 insertions(+), 32 deletions(-)

Test results:

The first ones are container (docker) based builds of tools/perf with and
without libelf support, objtool where it is supported and samples/bpf/, ditto.
Where clang is available, it is also used to build perf with/without libelf.

Several are cross builds, the ones with -x-ARCH and the android one, and those
may not have all the features built, due to lack of multi-arch devel packages,
available and being used so far on just a few, like
debian:experimental-x-{arm64,mipsel}.

The 'perf test' one will perform a variety of tests exercising
tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf commands
with a variety of command line event specifications to then intercept the
sys_perf_event syscall to check that the perf_event_attr fields are set up as
expected, among a variety of other unit tests.

Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
with a variety of feature sets, exercising the build with an incomplete set of
features as well as with a complete one. It is planned to have it run on each
of the containers mentioned above, using some container orchestration
infrastructure. Get in contact if interested in helping having this in place.

  # uname -a
  Linux jouet 4.12.0-rc6+ #3 SMP Tue Jun 27 15:12:38 -03 2017 x86_64 x86_64 x86_64 GNU/Linux
  # perf test
   1: vmlinux symtab matches kallsyms            : Ok
   2: Detect openat syscall event                : Ok
   3: Detect openat syscall event on all cpus    : Ok
   4: Read samples using the mmap interface      : Ok
   5: Parse event definition strings             : Ok
   6: Simple expression parser                   : Ok
   7: PERF_RECORD_* events & perf_sample fields  : Ok
   8: Parse perf pmu format                      : Ok
   9: DSO data read                              : Ok
  10: DSO data cache                             : Ok
  11: DSO data reopen                            : Ok
  12: Roundtrip evsel->name                      : Ok
  13: Parse sched tracepoints fields             : Ok
  14: syscalls:sys_enter_openat event fields     : Ok
  15: Setup struct perf_event_attr               : Ok
  16: Match and link multiple hists              : Ok
  17: 'import perf' in python                    : Ok
  18: Breakpoint overflow signal handler         : Ok
  19: Breakpoint overflow sampling               : Ok
  20: Number of exit events of a simple workload : Ok
  21: Software clock events period values        : Ok
  22: Object code reading                        : Ok
  23: Sample parsing                             : Ok
  24: Use a dummy software event to keep tracking: Ok
  25: Parse with no sample_id_all bit set        : Ok
  26: Filter hist entries                        : Ok
  27: Lookup mmap thread                         : Ok
  28: Share thread mg                            : Ok
  29: Sort output of hist entries                : Ok
  30: Cumulate child hist entries                : Ok
  31: Track with sched_switch                    : Ok
  32: Filter fds with revents mask in a fdarray  : Ok
  33: Add fd to a fdarray, making it autogrow    : Ok
  34: kmod_path__parse                           : Ok
  35: Thread map                                 : Ok
  36: LLVM search and compile                    :
  36.1: Basic BPF llvm compile                    : Ok
  36.2: kbuild searching                          : Ok
  36.3: Compile source for BPF prologue generation: Ok
  36.4: Compile source for BPF relocation         : Ok
  37: Session topology                           : Ok
  38: BPF filter                                 :
  38.1: Basic BPF filtering                      : Ok
  38.2: BPF pinning                              : Ok
  38.3: BPF prologue generation                  : Ok
  38.4: BPF relocation checker                   : Ok
  39: Synthesize thread map                      : Ok
  40: Remove thread map                          : Ok
  41: Synthesize cpu map                         : Ok
  42: Synthesize stat config                     : Ok
  43: Synthesize stat                            : Ok
  44: Synthesize stat round                      : Ok
  45: Synthesize attr update                     : Ok
  46: Event times                                : Ok
  47: Read backward ring buffer                  : Ok
  48: Print cpu map                              : Ok
  49: Probe SDT events                           : Ok
  50: is_printable_array                         : Ok
  51: Print bitmap                               : Ok
  52: perf hooks                                 : Ok
  53: builtin clang support                      : Skip (not compiled in)
  54: unit_number__scnprintf                     : Ok
  55: x86 rdpmc                                  : Ok
  56: Convert perf time to TSC                   : Ok
  57: DWARF unwind                               : Ok
  58: x86 instruction decoder - new instructions : Ok
  59: Intel cqm nmi context read                 : Skip
  #

  # dm
   1 alpine:3.4: Ok
   2 alpine:3.5: Ok
   3 alpine:3.6: Ok
   4 alpine:edge: Ok
   5 android-ndk:r12b-arm: Ok
   6 archlinux:latest: Ok
   7 centos:5: Ok
   8 centos:6: Ok
   9 centos:7: Ok
  10 debian:7: Ok
  11 debian:8: Ok
  12 debian:9: Ok
  13 debian:experimental: Ok
  14 debian:experimental-x-arm64: Ok
  15 debian:experimental-x-mips: Ok
  16 debian:experimental-x-mips64: Ok
  17 debian:experimental-x-mipsel: Ok
  18 fedora:20: Ok
  19 fedora:21: Ok
  20 fedora:22: Ok
  21 fedora:23: Ok
  22 fedora:24: Ok
  23 fedora:24-x-ARC-uClibc: Ok
  24 fedora:25: Ok
  25 fedora:26: Ok
  26 fedora:rawhide: FAIL
  27 mageia:5: Ok
  28 opensuse:13.2: Ok
  29 opensuse:42.1: Ok
  30 opensuse:42.2: Ok
  31 opensuse:tumbleweed: Ok
  32 oraclelinux:6: Ok
  33 oraclelinux:7: Ok
  34 ubuntu:12.04.5: Ok
  35 ubuntu:14.04.4: Ok
  36 ubuntu:14.04.4-x-linaro-arm64: Ok
  37 ubuntu:15.10: Ok
  38 ubuntu:16.04: Ok
  39 ubuntu:16.04-x-arm: Ok
  40 ubuntu:16.04-x-arm64: Ok
  41 ubuntu:16.04-x-powerpc: Ok
  42 ubuntu:16.04-x-powerpc64: Ok
  43 ubuntu:16.04-x-powerpc64el: Ok
  44 ubuntu:16.04-x-s390: Ok
  45 ubuntu:16.10: Ok
  46 ubuntu:17.04: Ok
  47 ubuntu:17.10: Ok
  #

  $ make -C tools/perf build-test
  make: Entering directory '/home/acme/git/linux/tools/perf'
  - tarpkg: ./tests/perf-targz-src-pkg .
           make_no_libunwind_O: make NO_LIBUNWIND=1
         make_install_prefix_O: make install prefix=/tmp/krava
                 make_static_O: make LDFLAGS=-static
  make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
              make_no_libelf_O: make NO_LIBELF=1
             make_no_libperl_O: make NO_LIBPERL=1
             make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
            make_install_bin_O: make install-bin
           make_no_backtrace_O: make NO_BACKTRACE=1
         make_with_clangllvm_O: make LIBCLANGLLVM=1
                make_no_gtk2_O: make NO_GTK2=1
   make_install_prefix_slash_O: make install prefix=/tmp/krava/
             make_util_map_o_O: make util/map.o
                make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1
                  make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
               make_no_slang_O: make NO_SLANG=1
       make_util_pmu_bison_o_O: make util/pmu-bison.o
                 make_perf_o_O: make perf.o
                   make_help_O: make help
           make_no_libpython_O: make NO_LIBPYTHON=1
        make_with_babeltrace_O: make LIBBABELTRACE=1
                  make_debug_O: make DEBUG=1
             make_no_libnuma_O: make NO_LIBNUMA=1
            make_no_auxtrace_O: make NO_AUXTRACE=1
                   make_pure_O: make
            make_no_demangle_O: make NO_DEMANGLE=1
                make_no_newt_O: make NO_NEWT=1
           make_no_libbionic_O: make NO_LIBBIONIC=1
              make_clean_all_O: make clean all
                    make_doc_O: make doc
            make_no_libaudit_O: make NO_LIBAUDIT=1
                   make_tags_O: make tags
                make_install_O: make install
              make_no_libbpf_O: make NO_LIBBPF=1
  OK
  make: Leaving directory '/home/acme/git/linux/tools/perf'
  $

[PATCH 01/15] perf tools: Add perf_evsel__read_size function

[Arnaldo Carvalho de Melo]

From: Jiri Olsa <jolsa@kernel.org>

Currently we use the size of struct perf_counts_values to read the
event, which prevents us to put any new member to the struct.

Adding perf_evsel__read_size to return size of the buffer needed for
event read.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170726120206.9099-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 450b5fadf8cb..4dd0fcc06db9 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1261,15 +1261,42 @@ void perf_counts_values__scale(struct perf_counts_values *count,
 		*pscaled = scaled;
 }
 
+static int perf_evsel__read_size(struct perf_evsel *evsel)
+{
+	u64 read_format = evsel->attr.read_format;
+	int entry = sizeof(u64); /* value */
+	int size = 0;
+	int nr = 1;
+
+	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+		size += sizeof(u64);
+
+	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+		size += sizeof(u64);
+
+	if (read_format & PERF_FORMAT_ID)
+		entry += sizeof(u64);
+
+	if (read_format & PERF_FORMAT_GROUP) {
+		nr = evsel->nr_members;
+		size += sizeof(u64);
+	}
+
+	size += entry * nr;
+	return size;
+}
+
 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
 		     struct perf_counts_values *count)
 {
+	size_t size = perf_evsel__read_size(evsel);
+
 	memset(count, 0, sizeof(*count));
 
 	if (FD(evsel, cpu, thread) < 0)
 		return -EINVAL;
 
-	if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) <= 0)
+	if (readn(FD(evsel, cpu, thread), count->values, size) <= 0)
 		return -errno;
 
 	return 0;
-- 
2.9.4

[PATCH 02/15] perf evsel: Add read_counter()

[Arnaldo Carvalho de Melo]

From: Jiri Olsa <jolsa@kernel.org>

Add perf_evsel__read_counter() to read single or group counter. After
calling this function the counter's evsel::counts struct is filled with
values for the counter and member of its group if there are any.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170726120206.9099-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/evsel.h |   2 +
 tools/perf/util/stat.c  |   4 ++
 tools/perf/util/stat.h  |   5 ++-
 4 files changed, 109 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4dd0fcc06db9..89aecf3a35c7 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1302,6 +1302,106 @@ int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
 	return 0;
 }
 
+static int
+perf_evsel__read_one(struct perf_evsel *evsel, int cpu, int thread)
+{
+	struct perf_counts_values *count = perf_counts(evsel->counts, cpu, thread);
+
+	return perf_evsel__read(evsel, cpu, thread, count);
+}
+
+static void
+perf_evsel__set_count(struct perf_evsel *counter, int cpu, int thread,
+		      u64 val, u64 ena, u64 run)
+{
+	struct perf_counts_values *count;
+
+	count = perf_counts(counter->counts, cpu, thread);
+
+	count->val    = val;
+	count->ena    = ena;
+	count->run    = run;
+}
+
+static int
+perf_evsel__process_group_data(struct perf_evsel *leader,
+			       int cpu, int thread, u64 *data)
+{
+	u64 read_format = leader->attr.read_format;
+	struct sample_read_value *v;
+	u64 nr, ena = 0, run = 0, i;
+
+	nr = *data++;
+
+	if (nr != (u64) leader->nr_members)
+		return -EINVAL;
+
+	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+		ena = *data++;
+
+	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+		run = *data++;
+
+	v = (struct sample_read_value *) data;
+
+	perf_evsel__set_count(leader, cpu, thread,
+			      v[0].value, ena, run);
+
+	for (i = 1; i < nr; i++) {
+		struct perf_evsel *counter;
+
+		counter = perf_evlist__id2evsel(leader->evlist, v[i].id);
+		if (!counter)
+			return -EINVAL;
+
+		perf_evsel__set_count(counter, cpu, thread,
+				      v[i].value, ena, run);
+	}
+
+	return 0;
+}
+
+static int
+perf_evsel__read_group(struct perf_evsel *leader, int cpu, int thread)
+{
+	struct perf_stat_evsel *ps = leader->priv;
+	u64 read_format = leader->attr.read_format;
+	int size = perf_evsel__read_size(leader);
+	u64 *data = ps->group_data;
+
+	if (!(read_format & PERF_FORMAT_ID))
+		return -EINVAL;
+
+	if (!perf_evsel__is_group_leader(leader))
+		return -EINVAL;
+
+	if (!data) {
+		data = zalloc(size);
+		if (!data)
+			return -ENOMEM;
+
+		ps->group_data = data;
+	}
+
+	if (FD(leader, cpu, thread) < 0)
+		return -EINVAL;
+
+	if (readn(FD(leader, cpu, thread), data, size) <= 0)
+		return -errno;
+
+	return perf_evsel__process_group_data(leader, cpu, thread, data);
+}
+
+int perf_evsel__read_counter(struct perf_evsel *evsel, int cpu, int thread)
+{
+	u64 read_format = evsel->attr.read_format;
+
+	if (read_format & PERF_FORMAT_GROUP)
+		return perf_evsel__read_group(evsel, cpu, thread);
+	else
+		return perf_evsel__read_one(evsel, cpu, thread);
+}
+
 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 			      int cpu, int thread, bool scale)
 {
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index fb40ca3c6519..de03c18daaf0 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -299,6 +299,8 @@ static inline bool perf_evsel__match2(struct perf_evsel *e1,
 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
 		     struct perf_counts_values *count);
 
+int perf_evsel__read_counter(struct perf_evsel *evsel, int cpu, int thread);
+
 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 			      int cpu, int thread, bool scale);
 
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 53b9a994a3dc..35e9848734d6 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -128,6 +128,10 @@ static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 
 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 {
+	struct perf_stat_evsel *ps = evsel->priv;
+
+	if (ps)
+		free(ps->group_data);
 	zfree(&evsel->priv);
 }
 
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 7522bf10b03e..eacaf958e19d 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -28,8 +28,9 @@ enum perf_stat_evsel_id {
 };
 
 struct perf_stat_evsel {
-	struct stats		res_stats[3];
-	enum perf_stat_evsel_id	id;
+	struct stats		 res_stats[3];
+	enum perf_stat_evsel_id	 id;
+	u64			*group_data;
 };
 
 enum aggr_mode {
-- 
2.9.4

[PATCH 03/15] perf stat: Use group read for event groups

[Arnaldo Carvalho de Melo]

From: Jiri Olsa <jolsa@kernel.org>

Make perf stat use  group read if there  are groups defined. The group
read will get the values for all member of groups within a single
syscall instead of calling read syscall for every event.

We can see considerable less amount of kernel cycles spent on single
group read, than reading each event separately, like for following perf
stat command:

  # perf stat -e {cycles,instructions} -I 10 -a sleep 1

Monitored with "perf stat -r 5 -e '{cycles:u,cycles:k}'"

Before:

        24,325,676      cycles:u
       297,040,775      cycles:k

       1.038554134 seconds time elapsed

After:
        25,034,418      cycles:u
       158,256,395      cycles:k

       1.036864497 seconds time elapsed

The perf_evsel__open fallback changes contributed by Andi Kleen.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170726120206.9099-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-stat.c | 30 +++++++++++++++++++++++++++---
 tools/perf/util/counts.h  |  1 +
 tools/perf/util/evsel.c   | 10 ++++++++++
 3 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 48ac53b199fc..866da7aa54bf 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -213,10 +213,20 @@ static void perf_stat__reset_stats(void)
 static int create_perf_stat_counter(struct perf_evsel *evsel)
 {
 	struct perf_event_attr *attr = &evsel->attr;
+	struct perf_evsel *leader = evsel->leader;
 
-	if (stat_config.scale)
+	if (stat_config.scale) {
 		attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 				    PERF_FORMAT_TOTAL_TIME_RUNNING;
+	}
+
+	/*
+	 * The event is part of non trivial group, let's enable
+	 * the group read (for leader) and ID retrieval for all
+	 * members.
+	 */
+	if (leader->nr_members > 1)
+		attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
 
 	attr->inherit = !no_inherit;
 
@@ -333,13 +343,21 @@ static int read_counter(struct perf_evsel *counter)
 			struct perf_counts_values *count;
 
 			count = perf_counts(counter->counts, cpu, thread);
-			if (perf_evsel__read(counter, cpu, thread, count)) {
+
+			/*
+			 * The leader's group read loads data into its group members
+			 * (via perf_evsel__read_counter) and sets threir count->loaded.
+			 */
+			if (!count->loaded &&
+			    perf_evsel__read_counter(counter, cpu, thread)) {
 				counter->counts->scaled = -1;
 				perf_counts(counter->counts, cpu, thread)->ena = 0;
 				perf_counts(counter->counts, cpu, thread)->run = 0;
 				return -1;
 			}
 
+			count->loaded = false;
+
 			if (STAT_RECORD) {
 				if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 					pr_err("failed to write stat event\n");
@@ -559,6 +577,11 @@ static int store_counter_ids(struct perf_evsel *counter)
 	return __store_counter_ids(counter, cpus, threads);
 }
 
+static bool perf_evsel__should_store_id(struct perf_evsel *counter)
+{
+	return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
+}
+
 static int __run_perf_stat(int argc, const char **argv)
 {
 	int interval = stat_config.interval;
@@ -631,7 +654,8 @@ static int __run_perf_stat(int argc, const char **argv)
 		if (l > unit_width)
 			unit_width = l;
 
-		if (STAT_RECORD && store_counter_ids(counter))
+		if (perf_evsel__should_store_id(counter) &&
+		    store_counter_ids(counter))
 			return -1;
 	}
 
diff --git a/tools/perf/util/counts.h b/tools/perf/util/counts.h
index 34d8baaf558a..cb45a6aecf9d 100644
--- a/tools/perf/util/counts.h
+++ b/tools/perf/util/counts.h
@@ -12,6 +12,7 @@ struct perf_counts_values {
 		};
 		u64 values[3];
 	};
+	bool	loaded;
 };
 
 struct perf_counts {
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 89aecf3a35c7..3735c9e0080d 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -49,6 +49,7 @@ static struct {
 	bool clockid_wrong;
 	bool lbr_flags;
 	bool write_backward;
+	bool group_read;
 } perf_missing_features;
 
 static clockid_t clockid;
@@ -1321,6 +1322,7 @@ perf_evsel__set_count(struct perf_evsel *counter, int cpu, int thread,
 	count->val    = val;
 	count->ena    = ena;
 	count->run    = run;
+	count->loaded = true;
 }
 
 static int
@@ -1677,6 +1679,8 @@ int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 	if (perf_missing_features.lbr_flags)
 		evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
 				     PERF_SAMPLE_BRANCH_NO_CYCLES);
+	if (perf_missing_features.group_read && evsel->attr.inherit)
+		evsel->attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
 retry_sample_id:
 	if (perf_missing_features.sample_id_all)
 		evsel->attr.sample_id_all = 0;
@@ -1832,6 +1836,12 @@ int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 		perf_missing_features.lbr_flags = true;
 		pr_debug2("switching off branch sample type no (cycles/flags)\n");
 		goto fallback_missing_features;
+	} else if (!perf_missing_features.group_read &&
+		    evsel->attr.inherit &&
+		   (evsel->attr.read_format & PERF_FORMAT_GROUP)) {
+		perf_missing_features.group_read = true;
+		pr_debug2("switching off group read\n");
+		goto fallback_missing_features;
 	}
 out_close:
 	do {
-- 
2.9.4

[PATCH 04/15] perf annotate: Do not overwrite perf_sample->weight

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

When we parse an event we may get a value from the kernel in response to
PERF_SAMPLE_WEIGHT being set in perf_event_attr->sample_type, and if it
is not set, then perf_sample->weight will be set to zero, which should
be ok according to a discussion with Andi Kleen [1]:

1: https://lkml.kernel.org/r/20170724174637.GS3044@two.firstfloor.org

Acked-by: Andi Kleen <andi@firstfloor.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-8ev8ufk3lzmvgz37yg9nv3qz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-annotate.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 6db782dfce96..658c920d74b9 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -177,8 +177,6 @@ static int perf_evsel__add_sample(struct perf_evsel *evsel,
 	 */
 	process_branch_stack(sample->branch_stack, al, sample);
 
-	sample->weight = 1;
-
 	he = hists__add_entry(hists, al, NULL, NULL, NULL, sample, true);
 	if (he == NULL)
 		return -ENOMEM;
-- 
2.9.4

[PATCH 05/15] perf sort: Use default sort if evlist is empty

[Arnaldo Carvalho de Melo]

From: David Carrillo-Cisneros <davidcc@google.com>

Fixes bug noted by Jiri in https://lkml.org/lkml/2017/6/13/755 and
caused by commit d49dadea7862 ("perf tools: Make 'trace' or
'trace_fields' sort key default for tracepoint events") not taking into
account that evlist is empty in pipe-mode.

Before this commit, pipe mode will only show bogus "100.00%  N/A"
instead of correct output as follows:

  $ perf record -o - sleep 1 | perf report -i -
  # To display the perf.data header info, please use --header/--header-only options.
  #
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
  #
  # Total Lost Samples: 0
  #
  # Samples: 8  of event 'cycles:ppH'
  # Event count (approx.): 145658
  #
  # Overhead  Trace output
  # ........  ............
  #
     100.00%  N/A

Correct output, after patch:

  $ perf record -o - sleep 1 | perf report -i -
  # To display the perf.data header info, please use --header/--header-only options.
  #
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
  #
  # Total Lost Samples: 0
  #
  # Samples: 8  of event 'cycles:ppH'
  # Event count (approx.): 191331
  #
  # Overhead  Command  Shared Object      Symbol
  # ........  .......  .................  .................................
  #
      81.63%  sleep    libc-2.19.so       [.] _exit
      13.58%  sleep    ld-2.19.so         [.] do_lookup_x
       2.34%  sleep    [kernel.kallsyms]  [k] context_switch
       2.34%  sleep    libc-2.19.so       [.] __GI___libc_nanosleep
       0.11%  perf     [kernel.kallsyms]  [k] __intel_pmu_enable_a

Reported-by: Jiri Olsa <jolsa@kernel.org>
Report-Link: https://lkml.kernel.org/r/20170613185422.GA6092@krava
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Turner <pjt@google.com>
Cc: Simon Que <sque@chromium.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: d49dadea7862 ("perf tools: Make 'trace' or 'trace_fields' sort key default for tracepoint events")
Link: https://lkml.kernel.org/r/20170721051157.47331-1-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evlist.h | 5 +++++
 tools/perf/util/sort.c   | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 0843746bc389..bf2c4936e35f 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -265,6 +265,11 @@ bool perf_evlist__valid_read_format(struct perf_evlist *evlist);
 void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
 				   struct list_head *list);
 
+static inline bool perf_evlist__empty(struct perf_evlist *evlist)
+{
+	return list_empty(&evlist->entries);
+}
+
 static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
 {
 	return list_entry(evlist->entries.next, struct perf_evsel, node);
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 8b327c955a4f..12359bd986db 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -2563,7 +2563,7 @@ static const char *get_default_sort_order(struct perf_evlist *evlist)
 
 	BUG_ON(sort__mode >= ARRAY_SIZE(default_sort_orders));
 
-	if (evlist == NULL)
+	if (evlist == NULL || perf_evlist__empty(evlist))
 		goto out_no_evlist;
 
 	evlist__for_each_entry(evlist, evsel) {
-- 
2.9.4

[PATCH 06/15] perf annotate stdio: Set enough columns for --show-total-period

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Now that we set the first column header according to wether
--show-total-period is being used, we need to size it accordingly.

Based-on-a-patch-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/tip-pu504ffnit4m334k09hxcbs3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/annotate.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index c2b4b00166ed..5125c2bbacaa 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1142,7 +1142,7 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
 			color = get_percent_color(percent);
 
 			if (symbol_conf.show_total_period)
-				color_fprintf(stdout, color, " %7" PRIu64,
+				color_fprintf(stdout, color, " %11" PRIu64,
 					      sample.period);
 			else
 				color_fprintf(stdout, color, " %7.2f", percent);
@@ -1165,7 +1165,7 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
 	} else if (max_lines && printed >= max_lines)
 		return 1;
 	else {
-		int width = 8;
+		int width = symbol_conf.show_total_period ? 12 : 8;
 
 		if (queue)
 			return -1;
@@ -1806,7 +1806,7 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
 	int printed = 2, queue_len = 0;
 	int more = 0;
 	u64 len;
-	int width = 8;
+	int width = symbol_conf.show_total_period ? 12 : 8;
 	int graph_dotted_len;
 
 	filename = strdup(dso->long_name);
-- 
2.9.4

[PATCH 07/15] perf annotate: Fix storing per line sym_hist_entry

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

The existing loop incremented the offset while using it as the array
index, when we went to an array of sym_hist_entry instances, we
should've moved the increment to outside of the array element reference,
oops, fix it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 461c17f00f40 ("perf annotate: Store the sample period in each histogram bucket")
Link: http://lkml.kernel.org/n/tip-s3dm6uyrazlpag3f0psfia07@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/annotate.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 5125c2bbacaa..2dab0e5a7f2f 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -963,8 +963,9 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 		u64 period = 0;
 
 		while (offset < end) {
-			hits += h->addr[offset++].nr_samples;
-			period += h->addr[offset++].period;
+			hits   += h->addr[offset].nr_samples;
+			period += h->addr[offset].period;
+			++offset;
 		}
 
 		if (h->nr_samples) {
-- 
2.9.4

[PATCH 08/15] perf annotate TUI: Use sym_hist_entry in disasm_line_samples

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Just paving the way to fix --show-total-period in the TUI, i.e. now
we save in struct disasm_line_samples not just the number of samples,
but also the total period.

Based-on-a-patch-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/tip-1sup5hkwrxocjvrmrmhs732o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index dbe4e630b90f..680fff70f7a0 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -17,8 +17,8 @@
 #include <sys/ttydefaults.h>
 
 struct disasm_line_samples {
-	double		percent;
-	u64		nr;
+	double		      percent;
+	struct sym_hist_entry he;
 };
 
 #define IPC_WIDTH 6
@@ -152,7 +152,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 						current_entry);
 			if (annotate_browser__opts.show_total_period) {
 				ui_browser__printf(browser, "%6" PRIu64 " ",
-						   bdl->samples[i].nr);
+						   bdl->samples[i].he.nr_samples);
 			} else {
 				ui_browser__printf(browser, "%6.2f ",
 						   bdl->samples[i].percent);
@@ -457,7 +457,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
 						pos->offset,
 						next ? next->offset : len,
 						&path, &sample);
-			bpos->samples[i].nr = sample.nr_samples;
+			bpos->samples[i].he = sample;
 
 			if (max_percent < bpos->samples[i].percent)
 				max_percent = bpos->samples[i].percent;
-- 
2.9.4

[PATCH 09/15] perf annotate TUI: Fix --show-total-period

[Arnaldo Carvalho de Melo]

From: Taeung Song <treeze.taeung@gmail.com>

We were showing the number of samples, not the total period, fix it.

Reported-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Fixes: 0c4a5bcea460 ("perf annotate: Display total number of samples with --show-total-period")
Link: http://lkml.kernel.org/r/1500500223-16753-1-git-send-email-treeze.taeung@gmail.com
[ extracted from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 680fff70f7a0..c382b1d8af42 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -152,7 +152,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 						current_entry);
 			if (annotate_browser__opts.show_total_period) {
 				ui_browser__printf(browser, "%6" PRIu64 " ",
-						   bdl->samples[i].he.nr_samples);
+						   bdl->samples[i].he.period);
 			} else {
 				ui_browser__printf(browser, "%6.2f ",
 						   bdl->samples[i].percent);
-- 
2.9.4

[PATCH 10/15] perf annotate TUI: Clarify calculation of column header widths

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

In commit f8f4aaead579 ("perf annotate: Finally display IPC and cycle
accounting") the 'pcnt_width' variable was abused in a few places to
also include the optional width of the "IPC" and "cycles" columns, while
in other places we stopped using 'pcnt_width' and instead its previous
equation...

Now that we need to tap into annotate_browser__pcnt_width() to consider
if --show-total-period is being used and instead of that hardcoded 7
(strlen("Percent")) we need to use it or strlen("Event count") we need
this properly clarified to avoid having to touch all the (7 * nr_events)
places.

Clarify this by introducing a separate annotate_browser__cycles_width()
to leave the pcnt_width calculate just what its name implies.

Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-szgb07t4k5wtvks8nzwkg710@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index c382b1d8af42..0f4bcc0d140c 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -110,11 +110,12 @@ static int annotate_browser__set_jumps_percent_color(struct annotate_browser *br
 
 static int annotate_browser__pcnt_width(struct annotate_browser *ab)
 {
-	int w = 7 * ab->nr_events;
+	return 7 * ab->nr_events;
+}
 
-	if (ab->have_cycles)
-		w += IPC_WIDTH + CYCLES_WIDTH;
-	return w;
+static int annotate_browser__cycles_width(struct annotate_browser *ab)
+{
+	return ab->have_cycles ? IPC_WIDTH + CYCLES_WIDTH : 0;
 }
 
 static void annotate_browser__write(struct ui_browser *browser, void *entry, int row)
@@ -127,7 +128,8 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 			     (!current_entry || (browser->use_navkeypressed &&
 					         !browser->navkeypressed)));
 	int width = browser->width, printed;
-	int i, pcnt_width = annotate_browser__pcnt_width(ab);
+	int i, pcnt_width = annotate_browser__pcnt_width(ab),
+	       cycles_width = annotate_browser__cycles_width(ab);
 	double percent_max = 0.0;
 	char bf[256];
 	bool show_title = false;
@@ -162,7 +164,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 		ui_browser__set_percent_color(browser, 0, current_entry);
 
 		if (!show_title)
-			ui_browser__write_nstring(browser, " ", 7 * ab->nr_events);
+			ui_browser__write_nstring(browser, " ", pcnt_width);
 		else
 			ui_browser__printf(browser, "%*s", 7, "Percent");
 	}
@@ -190,7 +192,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 		width += 1;
 
 	if (!*dl->line)
-		ui_browser__write_nstring(browser, " ", width - pcnt_width);
+		ui_browser__write_nstring(browser, " ", width - pcnt_width - cycles_width);
 	else if (dl->offset == -1) {
 		if (dl->line_nr && annotate_browser__opts.show_linenr)
 			printed = scnprintf(bf, sizeof(bf), "%-*d ",
@@ -199,7 +201,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 			printed = scnprintf(bf, sizeof(bf), "%*s  ",
 				    ab->addr_width, " ");
 		ui_browser__write_nstring(browser, bf, printed);
-		ui_browser__write_nstring(browser, dl->line, width - printed - pcnt_width + 1);
+		ui_browser__write_nstring(browser, dl->line, width - printed - pcnt_width - cycles_width + 1);
 	} else {
 		u64 addr = dl->offset;
 		int color = -1;
@@ -256,7 +258,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 		}
 
 		disasm_line__scnprintf(dl, bf, sizeof(bf), !annotate_browser__opts.use_offset);
-		ui_browser__write_nstring(browser, bf, width - pcnt_width - 3 - printed);
+		ui_browser__write_nstring(browser, bf, width - pcnt_width - cycles_width - 3 - printed);
 	}
 
 	if (current_entry)
-- 
2.9.4

[PATCH 11/15] perf annotate TUI: Fix column header when toggling period/percent

[Arnaldo Carvalho de Melo]

From: Taeung Song <treeze.taeung@gmail.com>

We have the 't' hotkey to toggle showing either the total period or the
percentage of samples for a given line, but we forgot to toggle as well
the column header, always showing "Percent", even when showing the
period, fix it.

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1501172169-6761-1-git-send-email-treeze.taeung@gmail.com
[ Extracted from a larger patch, s/Event count/Period/g ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 0f4bcc0d140c..46f297a4e94b 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -166,7 +166,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 		if (!show_title)
 			ui_browser__write_nstring(browser, " ", pcnt_width);
 		else
-			ui_browser__printf(browser, "%*s", 7, "Percent");
+			ui_browser__printf(browser, "%*s", 7, annotate_browser__opts.show_total_period ? "Period" : "Percent");
 	}
 	if (ab->have_cycles) {
 		if (dl->ipc)
-- 
2.9.4

[PATCH 12/15] perf annotate TUI: Set appropriate column width for period/percent

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Either when we start 'perf annotate' or 'perf report' with
--show-total-period or when we, in the annotate browser, press 't' to
toggle period/percent for the first column, we need to adjust the width
for the 'period' case.

Based-on-a-patch-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-n2np5qcs20u6qjdr9orygne6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/annotate.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 46f297a4e94b..80f38dab9c3a 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -110,7 +110,7 @@ static int annotate_browser__set_jumps_percent_color(struct annotate_browser *br
 
 static int annotate_browser__pcnt_width(struct annotate_browser *ab)
 {
-	return 7 * ab->nr_events;
+	return (annotate_browser__opts.show_total_period ? 12 : 7) * ab->nr_events;
 }
 
 static int annotate_browser__cycles_width(struct annotate_browser *ab)
@@ -153,7 +153,7 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 						bdl->samples[i].percent,
 						current_entry);
 			if (annotate_browser__opts.show_total_period) {
-				ui_browser__printf(browser, "%6" PRIu64 " ",
+				ui_browser__printf(browser, "%11" PRIu64 " ",
 						   bdl->samples[i].he.period);
 			} else {
 				ui_browser__printf(browser, "%6.2f ",
@@ -165,8 +165,10 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
 
 		if (!show_title)
 			ui_browser__write_nstring(browser, " ", pcnt_width);
-		else
-			ui_browser__printf(browser, "%*s", 7, annotate_browser__opts.show_total_period ? "Period" : "Percent");
+		else {
+			ui_browser__printf(browser, "%*s", pcnt_width,
+					   annotate_browser__opts.show_total_period ? "Period" : "Percent");
+		}
 	}
 	if (ab->have_cycles) {
 		if (dl->ipc)
-- 
2.9.4

[PATCH 13/15] perf data: Add callchain to CTF conversion

[Arnaldo Carvalho de Melo]

From: Geneviève Bastien <gbastien@versatic.net>

The field perf_callchain, if available, is added to the sampling events
during the CTF conversion. It is an array of u64 values.  The
perf_callchain_size field contains the size of the array.

It will allow the analysis of sampling data in trace visualization tools
like Trace Compass. Possible analyses with those data: dynamic
flamegraphs, correlation with other tracing data like a userspace trace.

Here follows a babeltrace CTF output of a trace with callchain:

  $ babeltrace ./myctftrace
  [17:38:45.672760285] (+?.?????????) cycles:ppp: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF81063EE4, perf_tid = 25841, perf_pid = 25774, perf_period = 1, perf_callchain_size = 7, perf_callchain = [ [0] = 0xFFFFFFFFFFFFFF80, [1] = 0xFFFFFFFF81063EE4, [2] = 0xFFFFFFFF8100C770, [3] = 0xFFFFFFFF81006EC6, [4] = 0xFFFFFFFF8118245E, [5] = 0xFFFFFFFF810A9224, [6] = 0xFFFFFFFF8164A4C6 ] }
  [17:38:45.672777672] (+0.000017387) cycles:ppp: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF81063EE4, perf_tid = 25841, perf_pid = 25774, perf_period = 1, perf_callchain_size = 8, perf_callchain = [ [0] = 0xFFFFFFFFFFFFFF80, [1] = 0xFFFFFFFF81063EE4, [2] = 0xFFFFFFFF8100C770, [3] = 0xFFFFFFFF81006EC6, [4] = 0xFFFFFFFF8118245E, [5] = 0xFFFFFFFF810A9224, [6] = 0xFFFFFFFF8164A4C6, [7] = 0xFFFFFFFF8164ABAD ] }
  [17:38:45.672786700] (+0.000009028) cycles:ppp: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF81063EE4, perf_tid = 25841, perf_pid = 25774, perf_period = 70, perf_callchain_size = 3, perf_callchain = [ [0] = 0xFFFFFFFFFFFFFF80, [1] = 0xFFFFFFFF81063EE4, [2] = 0xFFFFFFFF8100C770 ] }

Signed-off-by: Geneviève Bastien <gbastien@versatic.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Francis Deslauriers <francis.deslauriers@efficios.com>
Cc: Julien Desfossez <jdesfossez@efficios.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170727181205.24843-1-gbastien@versatic.net
[ Removed PERF_SAMPLE_CALLCHAIN from the TODO list, jolsa ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/data-convert-bt.c | 92 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 91 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 3149b70799fd..eeb2590a3ddf 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -506,6 +506,81 @@ add_bpf_output_values(struct bt_ctf_event_class *event_class,
 	return ret;
 }
 
+static int
+add_callchain_output_values(struct bt_ctf_event_class *event_class,
+		      struct bt_ctf_event *event,
+		      struct ip_callchain *callchain)
+{
+	struct bt_ctf_field_type *len_type, *seq_type;
+	struct bt_ctf_field *len_field, *seq_field;
+	unsigned int nr_elements = callchain->nr;
+	unsigned int i;
+	int ret;
+
+	len_type = bt_ctf_event_class_get_field_by_name(
+			event_class, "perf_callchain_size");
+	len_field = bt_ctf_field_create(len_type);
+	if (!len_field) {
+		pr_err("failed to create 'perf_callchain_size' for callchain output event\n");
+		ret = -1;
+		goto put_len_type;
+	}
+
+	ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
+	if (ret) {
+		pr_err("failed to set field value for perf_callchain_size\n");
+		goto put_len_field;
+	}
+	ret = bt_ctf_event_set_payload(event, "perf_callchain_size", len_field);
+	if (ret) {
+		pr_err("failed to set payload to perf_callchain_size\n");
+		goto put_len_field;
+	}
+
+	seq_type = bt_ctf_event_class_get_field_by_name(
+			event_class, "perf_callchain");
+	seq_field = bt_ctf_field_create(seq_type);
+	if (!seq_field) {
+		pr_err("failed to create 'perf_callchain' for callchain output event\n");
+		ret = -1;
+		goto put_seq_type;
+	}
+
+	ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
+	if (ret) {
+		pr_err("failed to set length of 'perf_callchain'\n");
+		goto put_seq_field;
+	}
+
+	for (i = 0; i < nr_elements; i++) {
+		struct bt_ctf_field *elem_field =
+			bt_ctf_field_sequence_get_field(seq_field, i);
+
+		ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
+				((u64 *)(callchain->ips))[i]);
+
+		bt_ctf_field_put(elem_field);
+		if (ret) {
+			pr_err("failed to set callchain[%d]\n", i);
+			goto put_seq_field;
+		}
+	}
+
+	ret = bt_ctf_event_set_payload(event, "perf_callchain", seq_field);
+	if (ret)
+		pr_err("failed to set payload for raw_data\n");
+
+put_seq_field:
+	bt_ctf_field_put(seq_field);
+put_seq_type:
+	bt_ctf_field_type_put(seq_type);
+put_len_field:
+	bt_ctf_field_put(len_field);
+put_len_type:
+	bt_ctf_field_type_put(len_type);
+	return ret;
+}
+
 static int add_generic_values(struct ctf_writer *cw,
 			      struct bt_ctf_event *event,
 			      struct perf_evsel *evsel,
@@ -519,7 +594,6 @@ static int add_generic_values(struct ctf_writer *cw,
 	 *   PERF_SAMPLE_TIME         - not needed as we have it in
 	 *                              ctf event header
 	 *   PERF_SAMPLE_READ         - TODO
-	 *   PERF_SAMPLE_CALLCHAIN    - TODO
 	 *   PERF_SAMPLE_RAW          - tracepoint fields are handled separately
 	 *   PERF_SAMPLE_BRANCH_STACK - TODO
 	 *   PERF_SAMPLE_REGS_USER    - TODO
@@ -720,6 +794,7 @@ static int process_sample_event(struct perf_tool *tool,
 	struct bt_ctf_event_class *event_class;
 	struct bt_ctf_event *event;
 	int ret;
+	unsigned long type = evsel->attr.sample_type;
 
 	if (WARN_ONCE(!priv, "Failed to setup all events.\n"))
 		return 0;
@@ -751,6 +826,13 @@ static int process_sample_event(struct perf_tool *tool,
 			return -1;
 	}
 
+	if (type & PERF_SAMPLE_CALLCHAIN) {
+		ret = add_callchain_output_values(event_class,
+				event, sample->callchain);
+		if (ret)
+			return -1;
+	}
+
 	if (perf_evsel__is_bpf_output(evsel)) {
 		ret = add_bpf_output_values(event_class, event, sample);
 		if (ret)
@@ -1043,6 +1125,14 @@ static int add_generic_types(struct ctf_writer *cw, struct perf_evsel *evsel,
 	if (type & PERF_SAMPLE_TRANSACTION)
 		ADD_FIELD(event_class, cw->data.u64, "perf_transaction");
 
+	if (type & PERF_SAMPLE_CALLCHAIN) {
+		ADD_FIELD(event_class, cw->data.u32, "perf_callchain_size");
+		ADD_FIELD(event_class,
+			bt_ctf_field_type_sequence_create(
+				cw->data.u64_hex, "perf_callchain_size"),
+			"perf_callchain");
+	}
+
 #undef ADD_FIELD
 	return 0;
 }
-- 
2.9.4

[PATCH 14/15] perf data: Add mmap[2] events to CTF conversion

[Arnaldo Carvalho de Melo]

From: Geneviève Bastien <gbastien@versatic.net>

This adds the mmap and mmap2 events to the CTF trace obtained from perf
data.

These events will allow CTF trace visualization tools like Trace Compass
to automatically resolve the symbols of the callchain to the
corresponding function or origin library.

To include those events, one needs to convert with the --all option.
Here follows an output of babeltrace:

  $ sudo perf data convert --all --to-ctf myctftrace
  $ babeltrace ./myctftrace
  [19:00:00.000000000] (+0.000000000) perf_mmap2: { cpu_id = 0 },
 { pid = 638, tid = 638, start = 0x7F54AE39E000, filename =
 "/usr/lib/ld-2.25.so" }
  [19:00:00.000000000] (+0.000000000) perf_mmap2: { cpu_id = 0 }, { pid =
 638, tid = 638, start = 0x7F54AE565000, filename =
 "/usr/lib/libudev.so.1.6.6" }
  [19:00:00.000000000] (+0.000000000) perf_mmap2: { cpu_id = 0 }, { pid =
 638, tid = 638, start = 0x7FFC093EA000, filename = "[vdso]" }

Signed-off-by: Geneviève Bastien <gbastien@versatic.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Francis Deslauriers <francis.deslauriers@efficios.com>
Cc: Julien Desfossez <jdesfossez@efficios.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170727181205.24843-2-gbastien@versatic.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/data-convert-bt.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index eeb2590a3ddf..2346cecb8ea2 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -76,6 +76,8 @@ struct ctf_writer {
 	struct bt_ctf_event_class	*comm_class;
 	struct bt_ctf_event_class	*exit_class;
 	struct bt_ctf_event_class	*fork_class;
+	struct bt_ctf_event_class	*mmap_class;
+	struct bt_ctf_event_class	*mmap2_class;
 };
 
 struct convert {
@@ -915,6 +917,18 @@ __FUNC_PROCESS_NON_SAMPLE(exit,
 	__NON_SAMPLE_SET_FIELD(fork, u32, ptid);
 	__NON_SAMPLE_SET_FIELD(fork, u64, time);
 )
+__FUNC_PROCESS_NON_SAMPLE(mmap,
+	__NON_SAMPLE_SET_FIELD(mmap, u32, pid);
+	__NON_SAMPLE_SET_FIELD(mmap, u32, tid);
+	__NON_SAMPLE_SET_FIELD(mmap, u64_hex, start);
+	__NON_SAMPLE_SET_FIELD(mmap, string, filename);
+)
+__FUNC_PROCESS_NON_SAMPLE(mmap2,
+	__NON_SAMPLE_SET_FIELD(mmap2, u32, pid);
+	__NON_SAMPLE_SET_FIELD(mmap2, u32, tid);
+	__NON_SAMPLE_SET_FIELD(mmap2, u64_hex, start);
+	__NON_SAMPLE_SET_FIELD(mmap2, string, filename);
+)
 #undef __NON_SAMPLE_SET_FIELD
 #undef __FUNC_PROCESS_NON_SAMPLE
 
@@ -1254,6 +1268,19 @@ __FUNC_ADD_NON_SAMPLE_EVENT_CLASS(exit,
 	__NON_SAMPLE_ADD_FIELD(u64, time);
 )
 
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(u64_hex, start);
+	__NON_SAMPLE_ADD_FIELD(string, filename);
+)
+
+__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap2,
+	__NON_SAMPLE_ADD_FIELD(u32, pid);
+	__NON_SAMPLE_ADD_FIELD(u32, tid);
+	__NON_SAMPLE_ADD_FIELD(u64_hex, start);
+	__NON_SAMPLE_ADD_FIELD(string, filename);
+)
 #undef __NON_SAMPLE_ADD_FIELD
 #undef __FUNC_ADD_NON_SAMPLE_EVENT_CLASS
 
@@ -1271,6 +1298,12 @@ static int setup_non_sample_events(struct ctf_writer *cw,
 	ret = add_fork_event(cw);
 	if (ret)
 		return ret;
+	ret = add_mmap_event(cw);
+	if (ret)
+		return ret;
+	ret = add_mmap2_event(cw);
+	if (ret)
+		return ret;
 	return 0;
 }
 
@@ -1572,6 +1605,8 @@ int bt_convert__perf2ctf(const char *input, const char *path,
 		c.tool.comm = process_comm_event;
 		c.tool.exit = process_exit_event;
 		c.tool.fork = process_fork_event;
+		c.tool.mmap = process_mmap_event;
+		c.tool.mmap2 = process_mmap2_event;
 	}
 
 	err = perf_config(convert__config, &c);
-- 
2.9.4

[PATCH 15/15] perf data: Add doc when no conversion support compiled

[Arnaldo Carvalho de Melo]

From: Geneviève Bastien <gbastien@versatic.net>

This adds documentation on the environment variables needed to the
message telling that no conversion support is compiled in.

Committer testing:

  $ make -C tools/perf install
  $ perf data convert --all --to-ctf myctftrace
  No conversion support compiled in. perf should be compiled with environment variables LIBBABELTRACE=1 and LIBBABELTRACE_DIR=/path/to/libbabeltrace/
  $

Signed-off-by: Geneviève Bastien <gbastien@versatic.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Francis Deslauriers <francis.deslauriers@efficios.com>
Cc: Julien Desfossez <jdesfossez@efficios.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170727181205.24843-3-gbastien@versatic.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
index 0adb5f82335a..46cd8490baf4 100644
--- a/tools/perf/builtin-data.c
+++ b/tools/perf/builtin-data.c
@@ -69,7 +69,7 @@ static int cmd_data_convert(int argc, const char **argv)
 	};
 
 #ifndef HAVE_LIBBABELTRACE_SUPPORT
-	pr_err("No conversion support compiled in.\n");
+	pr_err("No conversion support compiled in. perf should be compiled with environment variables LIBBABELTRACE=1 and LIBBABELTRACE_DIR=/path/to/libbabeltrace/\n");
 	return -1;
 #endif
 
-- 
2.9.4

Re: [GIT PULL 00/15] perf/core improvements and fixes

[Ingo Molnar]

* Arnaldo Carvalho de Melo <acme@kernel.org> wrote:

> Hi Ingo,
> 
> 	Please consider pulling,
> 
> - Arnaldo
> 
> Test results at the end of this message, as usual.
> 
> The following changes since commit ee438ec8f33c5af0d4a4ffb935c5b9272e8c2680:
> 
>   Merge tag 'perf-core-for-mingo-4.14-20170725' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (2017-07-26 19:07:30 +0200)
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.14-20170728
> 
> for you to fetch changes up to 6b7007af728df7258bb60ed73099be3b59b3030e:
> 
>   perf data: Add doc when no conversion support compiled (2017-07-28 16:30:45 -0300)
> 
> ----------------------------------------------------------------
> perf/core improvements and fixes for 4.14:
> 
> New features:
> 
> - Add PERF_SAMPLE_CALLCHAIN and PERF_RECORD_MMAP[2] to 'perf data' CTF
>   conversion, allowing CTF trace visualization tools to show callchains
>   and to resolve symbols (Geneviève Bastien)
> 
> Improvements:
> 
> - Use group read for event groups in 'perf stat', reducing overhead when
>   groups are defined in the event specification, i.e. when using {} to
>   enclose a list of events, asking them to be read at the same time,
>   e.g.: "perf stat -e '{cycles,instructions}'" (Jiri Olsa)
> 
> Fixes:
> 
> - Do not overwrite perf_sample->weight in 'perf annotate' when
>   processing samples, use whatever came from the kernel when
>   perf_event_attr.sample_type has PERF_SAMPLE_WEIGHT set or just handle
>   its default value, 0, when that is not set and "weight" is one of the
>   sort orders chosen (Arnaldo Carvalho de Melo)
> 
> - 'perf annotate --show-total-period' fixes:
>    - TUI should show period, not nr_samples
>    - Set appropriate column width for period/percent
>    - Fix the column header to show "Period" when when that is what
>      is being asked for
>   (Taeung Song, Arnaldo Carvalho de Melo)
> 
> - Use default sort if evlist is empty, fixing pipe mode (David Carrillo-Cisneros)
> 
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> ----------------------------------------------------------------
> Arnaldo Carvalho de Melo (6):
>       perf annotate: Do not overwrite perf_sample->weight
>       perf annotate stdio: Set enough columns for --show-total-period
>       perf annotate: Fix storing per line sym_hist_entry
>       perf annotate TUI: Use sym_hist_entry in disasm_line_samples
>       perf annotate TUI: Clarify calculation of column header widths
>       perf annotate TUI: Set appropriate column width for period/percent
> 
> David Carrillo-Cisneros (1):
>       perf sort: Use default sort if evlist is empty
> 
> Geneviève Bastien (3):
>       perf data: Add callchain to CTF conversion
>       perf data: Add mmap[2] events to CTF conversion
>       perf data: Add doc when no conversion support compiled
> 
> Jiri Olsa (3):
>       perf tools: Add perf_evsel__read_size function
>       perf evsel: Add read_counter()
>       perf stat: Use group read for event groups
> 
> Taeung Song (2):
>       perf annotate TUI: Fix --show-total-period
>       perf annotate TUI: Fix column header when toggling period/percent
> 
>  tools/perf/builtin-annotate.c     |   2 -
>  tools/perf/builtin-data.c         |   2 +-
>  tools/perf/builtin-stat.c         |  30 +++++++-
>  tools/perf/ui/browsers/annotate.c |  36 +++++-----
>  tools/perf/util/annotate.c        |  11 +--
>  tools/perf/util/counts.h          |   1 +
>  tools/perf/util/data-convert-bt.c | 127 +++++++++++++++++++++++++++++++++-
>  tools/perf/util/evlist.h          |   5 ++
>  tools/perf/util/evsel.c           | 139 +++++++++++++++++++++++++++++++++++++-
>  tools/perf/util/evsel.h           |   2 +
>  tools/perf/util/sort.c            |   2 +-
>  tools/perf/util/stat.c            |   4 ++
>  tools/perf/util/stat.h            |   5 +-
>  13 files changed, 334 insertions(+), 32 deletions(-)

Pulled, thanks a lot Arnaldo!

	Ingo

[PATCH] perf build: Clarify header version warning message

[Ingo Molnar]

Change this:

  Warning: arch/x86/include/asm/disabled-features.h differs from kernel
  Warning: arch/x86/include/asm/cpufeatures.h differs from kernel
  Warning: arch/powerpc/include/uapi/asm/kvm.h differs from kernel
  Warning: arch/s390/include/uapi/asm/kvm.h differs from kernel

to:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/disabled-features.h' differs from latest version at 'arch/x86/include/asm/disabled-features.h'
  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
  Warning: Kernel ABI header at 'tools/arch/powerpc/include/uapi/asm/kvm.h' differs from latest version at 'arch/powerpc/include/uapi/asm/kvm.h'
  Warning: Kernel ABI header at 'tools/arch/s390/include/uapi/asm/kvm.h' differs from latest version at 'arch/s390/include/uapi/asm/kvm.h'

... to make it clearer what the warning is about, and to make it easier to diff 
the two versions when syncing up the files.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/perf/check-headers.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
index 9b6295809a3b..d87bc6af0ac2 100755
--- a/tools/perf/check-headers.sh
+++ b/tools/perf/check-headers.sh
@@ -47,7 +47,7 @@ check () {
   cmd="diff $opts ../$file ../../$file > /dev/null"
 
   test -f ../../$file &&
-  eval $cmd || echo "Warning: $file differs from kernel" >&2
+  eval $cmd || echo "Warning: Kernel ABI header at 'tools/$file' differs from latest version at '$file'" >&2
 }
 
 

perf build: Clarify open-coded header version warning message

[Ingo Molnar]

In this patch we changed the header checks:

  perf build: Clarify header version warning message

Unfortunately the header checks were copied to various places and thus the message got
out of sync. Fix some of them here.

Note that there's still old, misleading messages remaining in:

  tools/objtool/Makefile: || echo "warning: objtool: x86 instruction decoder differs from kernel" >&2 )) || true
  tools/objtool/Makefile: || echo "warning: objtool: orc_types.h differs from kernel" >&2 )) || true

here objtool copied the perf message, plus:

 tools/perf/util/intel-pt-decoder/Build: || echo "Warning: Intel PT: x86 instruction decoder differs from kernel" >&2 )) || true

here the PT code regressed over the original message and only emits a vague warning
instead of specific file names...

All of this should be consolidated into tools/Build/ and used in a consistent 
manner.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/lib/bpf/Makefile       | 4 ++--
 tools/perf/arch/x86/Makefile | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 1f5300e56b44..e87b5903f4bb 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -156,10 +156,10 @@ all_cmd: $(CMD_TARGETS)
 $(BPF_IN): force elfdep bpfdep
 	@(test -f ../../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
 	(diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
-	echo "Warning: tools/include/uapi/linux/bpf.h differs from kernel" >&2 )) || true
+	echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
 	@(test -f ../../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \
 	(diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \
-	echo "Warning: tools/include/uapi/linux/bpf_common.h differs from kernel" >&2 )) || true
+	echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf_common.h' differs from latest version at 'include/uapi/linux/bpf_common.h'" >&2 )) || true
 	$(Q)$(MAKE) $(build)=libbpf
 
 $(OUTPUT)libbpf.so: $(BPF_IN)
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 6c9211b18ec0..9a628a24c5c9 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -20,7 +20,7 @@ _dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
 $(header): $(sys)/syscall_64.tbl $(systbl)
 	@(test -d ../../kernel -a -d ../../tools -a -d ../perf && ( \
         (diff -B arch/x86/entry/syscalls/syscall_64.tbl ../../arch/x86/entry/syscalls/syscall_64.tbl >/dev/null) \
-        || echo "Warning: x86_64's syscall_64.tbl differs from kernel" >&2 )) || true
+        || echo "Warning: Kernel ABI header at 'tools/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'" >&2 )) || true
 	$(Q)$(SHELL) '$(systbl)' $(sys)/syscall_64.tbl 'x86_64' > $@
 
 clean::

tools/include: Sync kernel ABI headers with tooling headers

[Ingo Molnar]

Sync up (copy) the following v4.13 kernel headers to the tooling headers:

  arch/arm/include/uapi/asm/kvm.h:
  arch/arm64/include/uapi/asm/kvm.h:
  arch/powerpc/include/uapi/asm/kvm.h:
  arch/s390/include/uapi/asm/kvm.h:

   - KVM ABI extensions, which do not affect perf tooling

  arch/x86/include/asm/cpufeatures.h:
  arch/x86/include/asm/disabled-features.h:

   - New PCID CPU feature on Intel CPUs - does not affect tooling.

I.e. no real changes were needed to resolve the build warnings, just a plain copy 
of the latest kernel header version.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/arch/arm/include/uapi/asm/kvm.h          |  8 ++++++++
 tools/arch/arm64/include/uapi/asm/kvm.h        |  3 +++
 tools/arch/powerpc/include/uapi/asm/kvm.h      |  6 ++++++
 tools/arch/s390/include/uapi/asm/kvm.h         | 12 ++++++++++++
 tools/arch/x86/include/asm/cpufeatures.h       |  2 ++
 tools/arch/x86/include/asm/disabled-features.h |  4 +++-
 6 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/tools/arch/arm/include/uapi/asm/kvm.h b/tools/arch/arm/include/uapi/asm/kvm.h
index 5e3c673fa3f4..5db2d4c6a55f 100644
--- a/tools/arch/arm/include/uapi/asm/kvm.h
+++ b/tools/arch/arm/include/uapi/asm/kvm.h
@@ -203,6 +203,14 @@ struct kvm_arch_memory_slot {
 #define KVM_DEV_ARM_VGIC_LINE_LEVEL_INTID_MASK 0x3ff
 #define VGIC_LEVEL_INFO_LINE_LEVEL	0
 
+/* Device Control API on vcpu fd */
+#define KVM_ARM_VCPU_PMU_V3_CTRL	0
+#define   KVM_ARM_VCPU_PMU_V3_IRQ	0
+#define   KVM_ARM_VCPU_PMU_V3_INIT	1
+#define KVM_ARM_VCPU_TIMER_CTRL		1
+#define   KVM_ARM_VCPU_TIMER_IRQ_VTIMER		0
+#define   KVM_ARM_VCPU_TIMER_IRQ_PTIMER		1
+
 #define   KVM_DEV_ARM_VGIC_CTRL_INIT		0
 #define   KVM_DEV_ARM_ITS_SAVE_TABLES		1
 #define   KVM_DEV_ARM_ITS_RESTORE_TABLES	2
diff --git a/tools/arch/arm64/include/uapi/asm/kvm.h b/tools/arch/arm64/include/uapi/asm/kvm.h
index 70eea2ecc663..9f3ca24bbcc6 100644
--- a/tools/arch/arm64/include/uapi/asm/kvm.h
+++ b/tools/arch/arm64/include/uapi/asm/kvm.h
@@ -232,6 +232,9 @@ struct kvm_arch_memory_slot {
 #define KVM_ARM_VCPU_PMU_V3_CTRL	0
 #define   KVM_ARM_VCPU_PMU_V3_IRQ	0
 #define   KVM_ARM_VCPU_PMU_V3_INIT	1
+#define KVM_ARM_VCPU_TIMER_CTRL		1
+#define   KVM_ARM_VCPU_TIMER_IRQ_VTIMER		0
+#define   KVM_ARM_VCPU_TIMER_IRQ_PTIMER		1
 
 /* KVM_IRQ_LINE irq field index values */
 #define KVM_ARM_IRQ_TYPE_SHIFT		24
diff --git a/tools/arch/powerpc/include/uapi/asm/kvm.h b/tools/arch/powerpc/include/uapi/asm/kvm.h
index 07fbeb927834..8cf8f0c96906 100644
--- a/tools/arch/powerpc/include/uapi/asm/kvm.h
+++ b/tools/arch/powerpc/include/uapi/asm/kvm.h
@@ -60,6 +60,12 @@ struct kvm_regs {
 
 #define KVM_SREGS_E_FSL_PIDn	(1 << 0) /* PID1/PID2 */
 
+/* flags for kvm_run.flags */
+#define KVM_RUN_PPC_NMI_DISP_MASK		(3 << 0)
+#define   KVM_RUN_PPC_NMI_DISP_FULLY_RECOV	(1 << 0)
+#define   KVM_RUN_PPC_NMI_DISP_LIMITED_RECOV	(2 << 0)
+#define   KVM_RUN_PPC_NMI_DISP_NOT_RECOV	(3 << 0)
+
 /*
  * Feature bits indicate which sections of the sregs struct are valid,
  * both in KVM_GET_SREGS and KVM_SET_SREGS.  On KVM_SET_SREGS, registers
diff --git a/tools/arch/s390/include/uapi/asm/kvm.h b/tools/arch/s390/include/uapi/asm/kvm.h
index 3dd2a1d308dd..69d09c39bbcd 100644
--- a/tools/arch/s390/include/uapi/asm/kvm.h
+++ b/tools/arch/s390/include/uapi/asm/kvm.h
@@ -28,6 +28,7 @@
 #define KVM_DEV_FLIC_CLEAR_IO_IRQ	8
 #define KVM_DEV_FLIC_AISM		9
 #define KVM_DEV_FLIC_AIRQ_INJECT	10
+#define KVM_DEV_FLIC_AISM_ALL		11
 /*
  * We can have up to 4*64k pending subchannels + 8 adapter interrupts,
  * as well as up  to ASYNC_PF_PER_VCPU*KVM_MAX_VCPUS pfault done interrupts.
@@ -53,6 +54,11 @@ struct kvm_s390_ais_req {
 	__u16 mode;
 };
 
+struct kvm_s390_ais_all {
+	__u8 simm;
+	__u8 nimm;
+};
+
 #define KVM_S390_IO_ADAPTER_MASK 1
 #define KVM_S390_IO_ADAPTER_MAP 2
 #define KVM_S390_IO_ADAPTER_UNMAP 3
@@ -70,6 +76,7 @@ struct kvm_s390_io_adapter_req {
 #define KVM_S390_VM_TOD			1
 #define KVM_S390_VM_CRYPTO		2
 #define KVM_S390_VM_CPU_MODEL		3
+#define KVM_S390_VM_MIGRATION		4
 
 /* kvm attributes for mem_ctrl */
 #define KVM_S390_VM_MEM_ENABLE_CMMA	0
@@ -151,6 +158,11 @@ struct kvm_s390_vm_cpu_subfunc {
 #define KVM_S390_VM_CRYPTO_DISABLE_AES_KW	2
 #define KVM_S390_VM_CRYPTO_DISABLE_DEA_KW	3
 
+/* kvm attributes for migration mode */
+#define KVM_S390_VM_MIGRATION_STOP	0
+#define KVM_S390_VM_MIGRATION_START	1
+#define KVM_S390_VM_MIGRATION_STATUS	2
+
 /* for KVM_GET_REGS and KVM_SET_REGS */
 struct kvm_regs {
 	/* general purpose regs for s390 */
diff --git a/tools/arch/x86/include/asm/cpufeatures.h b/tools/arch/x86/include/asm/cpufeatures.h
index 2701e5f8145b..14f0f2913364 100644
--- a/tools/arch/x86/include/asm/cpufeatures.h
+++ b/tools/arch/x86/include/asm/cpufeatures.h
@@ -196,6 +196,7 @@
 
 #define X86_FEATURE_HW_PSTATE	( 7*32+ 8) /* AMD HW-PState */
 #define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
+#define X86_FEATURE_SME		( 7*32+10) /* AMD Secure Memory Encryption */
 
 #define X86_FEATURE_INTEL_PPIN	( 7*32+14) /* Intel Processor Inventory Number */
 #define X86_FEATURE_INTEL_PT	( 7*32+15) /* Intel Processor Trace */
@@ -286,6 +287,7 @@
 #define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */
 #define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
 #define X86_FEATURE_AVIC	(15*32+13) /* Virtual Interrupt Controller */
+#define X86_FEATURE_VIRTUAL_VMLOAD_VMSAVE (15*32+15) /* Virtual VMLOAD VMSAVE */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
 #define X86_FEATURE_AVX512VBMI  (16*32+ 1) /* AVX512 Vector Bit Manipulation instructions*/
diff --git a/tools/arch/x86/include/asm/disabled-features.h b/tools/arch/x86/include/asm/disabled-features.h
index 5dff775af7cd..c10c9128f54e 100644
--- a/tools/arch/x86/include/asm/disabled-features.h
+++ b/tools/arch/x86/include/asm/disabled-features.h
@@ -21,11 +21,13 @@
 # define DISABLE_K6_MTRR	(1<<(X86_FEATURE_K6_MTRR & 31))
 # define DISABLE_CYRIX_ARR	(1<<(X86_FEATURE_CYRIX_ARR & 31))
 # define DISABLE_CENTAUR_MCR	(1<<(X86_FEATURE_CENTAUR_MCR & 31))
+# define DISABLE_PCID		0
 #else
 # define DISABLE_VME		0
 # define DISABLE_K6_MTRR	0
 # define DISABLE_CYRIX_ARR	0
 # define DISABLE_CENTAUR_MCR	0
+# define DISABLE_PCID		(1<<(X86_FEATURE_PCID & 31))
 #endif /* CONFIG_X86_64 */
 
 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
@@ -49,7 +51,7 @@
 #define DISABLED_MASK1	0
 #define DISABLED_MASK2	0
 #define DISABLED_MASK3	(DISABLE_CYRIX_ARR|DISABLE_CENTAUR_MCR|DISABLE_K6_MTRR)
-#define DISABLED_MASK4	0
+#define DISABLED_MASK4	(DISABLE_PCID)
 #define DISABLED_MASK5	0
 #define DISABLED_MASK6	0
 #define DISABLED_MASK7	0

[GIT PULL 00/15] perf/core improvements and fixes

[Arnaldo Carvalho de Melo]

Hi Ingo,

	Please consider pulling,

- Arnaldo

Test results at the end of this message, as usual.

The following changes since commit ba63f76e22ee723819c8cec86b31f7ea3182b2ed:

  Merge tag 'perf-core-for-mingo-4.14-20170821' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (2017-08-22 12:16:39 +0200)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.14-20170823

for you to fetch changes up to 60913e005c8d19ec5187a638eafdd088509dfb9e:

  perf tools: Fix static linking with libunwind (2017-08-22 13:24:55 -0300)

----------------------------------------------------------------
perf/core improvements and fixes:

- Expression parser enhancements for metrics (Andi Kleen)

- Fix buffer overflow while freeing events in 'perf stat' (Andi Kleen)

- Fix static linking with elfutils's libdf and with libunwind
  in Debian/Ubuntu (Konstantin Khlebnikov)

- Tighten detection of BPF events, avoiding matching some other PMU
  events such as 'cpu/uops_executed.core,cmask=1/' as a .c source
  file that ended up being considered a BPF event (Andi Kleen)

- Add Skylake server uncore JSON vendor events (Andi Kleen)

- Add support for printing new mem_info encodings, including
  'perf test' checks (Andi Kleen)

- Really install manpages via 'make install-man' (Konstantin Khlebnikov)

- Fix documentation for perf_event_paranoid and perf_event_mlock_kb
  sysctls (Konstantin Khlebnikov)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

----------------------------------------------------------------
Andi Kleen (11):
      perf xyarray: Save max_x, max_y
      perf evsel: Fix buffer overflow while freeing events
      perf bpf: Tighten detection of BPF events
      perf tools: Add utility function to detect SMT status
      perf tools: Expression parser enhancements for metrics
      perf tools: Increase maximum number of events in expressions
      perf tools: Dedup events in expression parsing
      perf vendor events: Add core event list for Skylake Server
      perf vendor events: Add Skylake server uncore event list
      perf tools: Add support for printing new mem_info encodings
      perf test: Add test cases for new data source encoding

Konstantin Khlebnikov (4):
      perf tools: Really install manpages via 'make install-man'
      perf: Fix documentation for sysctls perf_event_paranoid and perf_event_mlock_kb
      perf tools: Fix static linking with libdw from elfutils
      perf tools: Fix static linking with libunwind

 Documentation/sysctl/kernel.txt                    |   13 +-
 tools/include/uapi/linux/perf_event.h              |   30 +-
 tools/perf/Documentation/Makefile                  |    2 +-
 tools/perf/Makefile.config                         |   16 +-
 tools/perf/pmu-events/arch/x86/mapfile.csv         |    1 +
 tools/perf/pmu-events/arch/x86/skylakex/cache.json | 1672 ++++++++++++++++++++
 .../arch/x86/skylakex/floating-point.json          |   88 ++
 .../pmu-events/arch/x86/skylakex/frontend.json     |  482 ++++++
 .../perf/pmu-events/arch/x86/skylakex/memory.json  | 1396 ++++++++++++++++
 tools/perf/pmu-events/arch/x86/skylakex/other.json |   72 +
 .../pmu-events/arch/x86/skylakex/pipeline.json     |  950 +++++++++++
 .../arch/x86/skylakex/uncore-memory.json           |  172 ++
 .../pmu-events/arch/x86/skylakex/uncore-other.json | 1156 ++++++++++++++
 .../arch/x86/skylakex/virtual-memory.json          |  284 ++++
 tools/perf/tests/Build                             |    1 +
 tools/perf/tests/builtin-test.c                    |    4 +
 tools/perf/tests/expr.c                            |    5 +
 tools/perf/tests/mem.c                             |   56 +
 tools/perf/tests/openat-syscall-all-cpus.c         |    2 +-
 tools/perf/tests/openat-syscall.c                  |    2 +-
 tools/perf/tests/tests.h                           |    1 +
 tools/perf/util/Build                              |    1 +
 tools/perf/util/evlist.c                           |   12 +-
 tools/perf/util/evsel.c                            |   41 +-
 tools/perf/util/evsel.h                            |    7 +-
 tools/perf/util/expr.h                             |    2 +-
 tools/perf/util/expr.y                             |   74 +-
 tools/perf/util/mem-events.c                       |   43 +-
 tools/perf/util/parse-events.l                     |   23 +-
 tools/perf/util/smt.c                              |   44 +
 tools/perf/util/smt.h                              |    6 +
 tools/perf/util/xyarray.c                          |    2 +
 tools/perf/util/xyarray.h                          |   12 +
 33 files changed, 6607 insertions(+), 65 deletions(-)
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/cache.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/floating-point.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/frontend.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/memory.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/other.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/pipeline.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/uncore-memory.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/uncore-other.json
 create mode 100644 tools/perf/pmu-events/arch/x86/skylakex/virtual-memory.json
 create mode 100644 tools/perf/tests/mem.c
 create mode 100644 tools/perf/util/smt.c
 create mode 100644 tools/perf/util/smt.h

Test results:

The first ones are container (docker) based builds of tools/perf with and
without libelf support, objtool where it is supported and samples/bpf/, ditto.
Where clang is available, it is also used to build perf with/without libelf.

Several are cross builds, the ones with -x-ARCH, and the android one, and those
may not have all the features built, due to lack of multi-arch devel packages,
available and being used so far on just a few, like
debian:experimental-x-{arm64,mipsel}.

The 'perf test' one will perform a variety of tests exercising
tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf
commands with a variety of command line event specifications to then
intercept the sys_perf_event syscall to check that the perf_event_attr
fields are set up as expected, among a variety of other unit tests.

The 'perf test'  also runs shell scripts exercising the tools, checking
if they affect the system in certain ways, like setting up kprobes and
uprobes, request callchains for well known programs and check that they
are the expected ones, see if 'perf trace' beautifies system call
arguments correctly, etc.

Additionally, a new set of tests, script based, runs the tools in a live system,
setting probes in place that then gets used by 'perf trace', with its output
compared against expected results.

Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
with a variety of feature sets, exercising the build with an incomplete set of
features as well as with a complete one. It is planned to have it run on each
of the containers mentioned above, using some container orchestration
infrastructure. Get in contact if interested in helping having this in place.

  # dm
   1 alpine:3.4: Ok
   2 alpine:3.5: Ok
   3 alpine:3.6: Ok
   4 alpine:edge: Ok
   5 android-ndk:r12b-arm: Ok
   6 archlinux:latest: Ok
   7 centos:5: Ok
   8 centos:6: Ok
   9 centos:7: Ok
  10 debian:7: Ok
  11 debian:8: Ok
  12 debian:9: Ok
  13 debian:experimental: Ok
  14 debian:experimental-x-arm64: Ok
  15 debian:experimental-x-mips: Ok
  16 debian:experimental-x-mips64: Ok
  17 debian:experimental-x-mipsel: Ok
  18 fedora:20: Ok
  19 fedora:21: Ok
  20 fedora:22: Ok
  21 fedora:23: Ok
  22 fedora:24: Ok
  23 fedora:24-x-ARC-uClibc: Ok
  24 fedora:25: Ok
  25 fedora:26: Ok
  26 fedora:rawhide: Ok
  27 mageia:5: Ok
  28 opensuse:13.2: Ok
  29 opensuse:42.1: Ok
  30 opensuse:42.2: Ok
  31 opensuse:tumbleweed: Ok
  32 oraclelinux:6: Ok
  33 oraclelinux:7: Ok
  34 ubuntu:12.04.5: Ok
  35 ubuntu:14.04.4: Ok
  36 ubuntu:14.04.4-x-linaro-arm64: Ok
  37 ubuntu:15.10: Ok
  38 ubuntu:16.04: Ok
  39 ubuntu:16.04-x-arm: Ok
  40 ubuntu:16.04-x-arm64: Ok
  41 ubuntu:16.04-x-powerpc: Ok
  42 ubuntu:16.04-x-powerpc64: Ok
  43 ubuntu:16.04-x-powerpc64el: Ok
  44 ubuntu:16.04-x-s390: Ok
  45 ubuntu:16.10: Ok
  46 ubuntu:17.04: Ok
  47 ubuntu:17.10: Ok
  #

  # uname -a
  Linux jouet 4.13.0-rc4+ #2 SMP Fri Aug 11 12:39:09 -03 2017 x86_64 x86_64 x86_64 GNU/Linux
  # perf test
   1: vmlinux symtab matches kallsyms                       : Ok
   2: Detect openat syscall event                           : Ok
   3: Detect openat syscall event on all cpus               : Ok
   4: Read samples using the mmap interface                 : Ok
   5: Test data source output                               : Ok
   6: Parse event definition strings                        : Ok
   7: Simple expression parser                              : Ok
   8: PERF_RECORD_* events & perf_sample fields             : Ok
   9: Parse perf pmu format                                 : Ok
  10: DSO data read                                         : Ok
  11: DSO data cache                                        : Ok
  12: DSO data reopen                                       : Ok
  13: Roundtrip evsel->name                                 : Ok
  14: Parse sched tracepoints fields                        : Ok
  15: syscalls:sys_enter_openat event fields                : Ok
  16: Setup struct perf_event_attr                          : Ok
  17: Match and link multiple hists                         : Ok
  18: 'import perf' in python                               : Ok
  19: Breakpoint overflow signal handler                    : Ok
  20: Breakpoint overflow sampling                          : Ok
  21: Number of exit events of a simple workload            : Ok
  22: Software clock events period values                   : Ok
  23: Object code reading                                   : Ok
  24: Sample parsing                                        : Ok
  25: Use a dummy software event to keep tracking           : Ok
  26: Parse with no sample_id_all bit set                   : Ok
  27: Filter hist entries                                   : Ok
  28: Lookup mmap thread                                    : Ok
  29: Share thread mg                                       : Ok
  30: Sort output of hist entries                           : Ok
  31: Cumulate child hist entries                           : Ok
  32: Track with sched_switch                               : Ok
  33: Filter fds with revents mask in a fdarray             : Ok
  34: Add fd to a fdarray, making it autogrow               : Ok
  35: kmod_path__parse                                      : Ok
  36: Thread map                                            : Ok
  37: LLVM search and compile                               :
  37.1: Basic BPF llvm compile                              : Ok
  37.2: kbuild searching                                    : Ok
  37.3: Compile source for BPF prologue generation          : Ok
  37.4: Compile source for BPF relocation                   : Ok
  38: Session topology                                      : Ok
  39: BPF filter                                            :
  39.1: Basic BPF filtering                                 : Ok
  39.2: BPF pinning                                         : Ok
  39.3: BPF prologue generation                             : Ok
  39.4: BPF relocation checker                              : Ok
  40: Synthesize thread map                                 : Ok
  41: Remove thread map                                     : Ok
  42: Synthesize cpu map                                    : Ok
  43: Synthesize stat config                                : Ok
  44: Synthesize stat                                       : Ok
  45: Synthesize stat round                                 : Ok
  46: Synthesize attr update                                : Ok
  47: Event times                                           : Ok
  48: Read backward ring buffer                             : Ok
  49: Print cpu map                                         : Ok
  50: Probe SDT events                                      : Ok
  51: is_printable_array                                    : Ok
  52: Print bitmap                                          : Ok
  53: perf hooks                                            : Ok
  54: builtin clang support                                 : Skip (not compiled in)
  55: unit_number__scnprintf                                : Ok
  56: x86 rdpmc                                             : Ok
  57: Convert perf time to TSC                              : Ok
  58: DWARF unwind                                          : Ok
  59: x86 instruction decoder - new instructions            : Ok
  60: Intel cqm nmi context read                            : Skip
  61: Use vfs_getname probe to get syscall args filenames   : Ok
  62: probe libc's inet_pton & backtrace it with ping       : Ok
  63: Check open filename arg using perf trace + vfs_getname: Ok
  64: Add vfs_getname probe to get syscall args filenames   : Ok
  #

  $ make -C tools/perf build-test
  make: Entering directory '/home/acme/git/linux/tools/perf'
  - tarpkg: ./tests/perf-targz-src-pkg .
                   make_pure_O: make
       make_util_pmu_bison_o_O: make util/pmu-bison.o
                   make_tags_O: make tags
             make_util_map_o_O: make util/map.o
           make_no_libunwind_O: make NO_LIBUNWIND=1
              make_clean_all_O: make clean all
  make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
                 make_perf_o_O: make perf.o
                   make_help_O: make help
           make_no_libbionic_O: make NO_LIBBIONIC=1
           make_no_libpython_O: make NO_LIBPYTHON=1
             make_no_libperl_O: make NO_LIBPERL=1
                    make_doc_O: make doc
   make_install_prefix_slash_O: make install prefix=/tmp/krava/
                make_install_O: make install
                make_no_newt_O: make NO_NEWT=1
             make_no_libnuma_O: make NO_LIBNUMA=1
            make_install_bin_O: make install-bin
         make_install_prefix_O: make install prefix=/tmp/krava
            make_no_auxtrace_O: make NO_AUXTRACE=1
                  make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
                make_no_gtk2_O: make NO_GTK2=1
                make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1
        make_with_babeltrace_O: make LIBBABELTRACE=1
              make_no_libelf_O: make NO_LIBELF=1
            make_no_demangle_O: make NO_DEMANGLE=1
            make_no_libaudit_O: make NO_LIBAUDIT=1
              make_no_libbpf_O: make NO_LIBBPF=1
             make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
           make_no_backtrace_O: make NO_BACKTRACE=1
                  make_debug_O: make DEBUG=1
         make_with_clangllvm_O: make LIBCLANGLLVM=1
               make_no_slang_O: make NO_SLANG=1
  OK
  make: Leaving directory '/home/acme/git/linux/tools/perf'
  $