Re: [GIT PULL 00/11] perf/core improvements and fixes

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Thu, Mar 03, 2016 at 09:21:30AM +0100, Ingo Molnar escreveu:
 
> Hm, there's a 'perf stat' regression that I can see:
>
> Before:
>                                                   #    1.59  stalled cycles per insn
>      1,818,488,088      branches                  #  151.667 M/sec                  
> 
> After:
> 
>  triton:~/tip> perf stat -a sleep 1
> 
>           24166678      branches                  #    2.016 M/sec                  
> 
> ... see how the numbers became human-unreadable, losing the big-number separator?
> 
> I suspect it's due to the following commit:
> 
>   fa184776ac27 perf stat: Check existence of frontend/backed stalled cycles

Ok, I inserted Jiri's patch fixing the problem just before the commit
(fa184776ac27) that triggers it, so that we don't break bisection for
human-readable numbers in 'perf stat'.

Its all in a new signed tag, that combines the two outstanding ones
(perf-core-for-mingo-20160229 + perf-core-for-mingo-20160302), please
consider pulling.

- Arnaldo

The following changes since commit 675965b00d734c985e4285f5bec7e524d15fc4e1:

  perf: Export perf_event_sysfs_show() (2016-02-29 09:35:27 +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-20160303

for you to fetch changes up to fb4605ba47e772ff9d62d1d54218a832ec8b3e1d:

  perf stat: Check for frontend stalled for metrics (2016-03-03 11:10:40 -0300)

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

User visible:

- Check existence of frontend/backed stalled cycles in 'perf stat' (Andi Kleen)

- Implement CSV metrics output in 'perf stat' (Andi Kleen)

- Support metrics in 'perf stat' --per-core/socket mode (Andi Kleen)

- Avoid installing .o files from tools/lib/ into the python extension (Jiri Olsa)

- Rename the tracepoint '/format' field that carries the syscall ID from 'nr',
  that is also the name of some syscalls arguments, to "__syscall_nr", to
  avoid having multiple fields with the same name, that was breaking the
  python script skeleton generator from perf.data files (Taeung Song)

- Support converting data from bpf events in 'perf data' (Wang Nan)

- Fix segfault in 'perf test' hists related entries (Arnaldo Carvalho de Melo)

- Fix output of %llu for 64 bit values read on 32 bit machines in libtraceevent (Steven Rostedt)

- Fix time stamp rounding issue in libtraceevent (Chaos.Chen)

Infrastructure:

- Fix setlocale() breakage in the pmu parsing code (Jiri Olsa)

- Split libtraceevent's pevent_print_event() (Steven Rostedt)

- Librarize some 'perf record' bits to allow handling multiple perf.data
  files per session (Wang Nan)

- Ensure return non-zero rc when mmap fails in 'perf record' (Wang Nan)

- Fix double free on 'command_line' in a error path in 'perf script' (Colin Ian King)

- Initialize struct sigaction 'sa_flags' field in a 'perf test' entry (Colin Ian King)

- Fix various build warnings in turbostat, detected with gcc6 (Colin Ian King)

- Use .s extension for preprocessed assembler code (Masahiro Yamada)

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

----------------------------------------------------------------
Andi Kleen (4):
      perf stat: Check existence of frontend/backed stalled cycles
      perf stat: Implement CSV metrics output
      perf stat: Support metrics in --per-core/socket mode
      perf stat: Check for frontend stalled for metrics

Arnaldo Carvalho de Melo (1):
      perf test: Fix hists related entries

Chaos.Chen (1):
      tools lib traceevent: Fix time stamp rounding issue

Colin Ian King (3):
      perf script: Fix double free on command_line
      perf tests: Initialize sa.sa_flags
      tools/power turbostat: fix various build warnings

Jiri Olsa (2):
      perf tools: Fix python extension build
      perf tools: Fix locale handling in pmu parsing

Masahiro Yamada (1):
      tools build: Use .s extension for preprocessed assembler code

Steven Rostedt (1):
      tools lib traceevent: Split pevent_print_event() into specific functionality functions

Steven Rostedt (Red Hat) (2):
      tools lib traceevent: Set int_array fields to NULL if freeing from error
      tools lib traceevent: Fix output of %llu for 64 bit values read on 32 bit machines

Taeung Song (2):
      perf trace: Check and discard not only 'nr' but also '__syscall_nr'
      tracing/syscalls: Rename "/format" tracepoint field name "nr" to "__syscall_nr:

Wang Nan (6):
      perf data: Support converting data from bpf_perf_event_output()
      perf data: Explicitly set byte order for integer types
      perf record: Use WARN_ONCE to replace 'if' condition
      perf record: Extract synthesize code to record__synthesize()
      perf record: Introduce record__finish_output() to finish a perf.data
      perf record: Ensure return non-zero rc when mmap fail

 kernel/trace/trace_syscalls.c                      |  16 +-
 tools/build/Makefile.build                         |   2 +-
 tools/lib/traceevent/event-parse.c                 | 146 ++++++++++++++----
 tools/lib/traceevent/event-parse.h                 |  13 ++
 tools/perf/arch/x86/tests/rdpmc.c                  |   1 +
 tools/perf/builtin-record.c                        | 168 ++++++++++++---------
 tools/perf/builtin-stat.c                          | 158 +++++++++++++++++--
 tools/perf/builtin-trace.c                         |   8 +-
 tools/perf/util/data-convert-bt.c                  | 118 ++++++++++++++-
 tools/perf/util/pmu.c                              |  13 ++
 .../util/scripting-engines/trace-event-python.c    |   4 +-
 tools/perf/util/setup.py                           |   4 +
 tools/perf/util/sort.c                             |  37 +++--
 tools/perf/util/stat-shadow.c                      |  18 ++-
 tools/perf/util/stat.h                             |   1 +
 tools/power/x86/turbostat/turbostat.c              |   8 +-
 16 files changed, 566 insertions(+), 149 deletions(-)