[GIT PULL 00/12] perf/core improvements and fixes

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

Hi Ingo,

	Please consider pulling,

- Arnaldo

The following changes since commit 711460514b1c80494f14001bdf30dd70fd401a8f:

  Merge tag 'perf-urgent-for-mingo-20160527' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent (2016-05-29 20:15:37 +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-20160530

for you to fetch changes up to 01412261d99497021353c4b1d67e8df6c9cdc3c6:

  perf buildid-cache: Use path/to/bin/buildid/elf instead of path/to/bin/buildid (2016-05-30 13:15:03 -0300)

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

User visible/kernel ABI:

- Per event callchain limit: Recently we introduced a sysctl to tune the
  max-stack for all events for which callchains were requested:

  $ sysctl kernel.perf_event_max_stack
  kernel.perf_event_max_stack = 127

  Now this patch introduces a way to configure this per event, i.e. this
  becomes possible:

  $ perf record -e sched:*/max-stack=2/ -e block:*/max-stack=10/ -a

  allowing finer tuning of how much buffer space callchains use.

  This uses an u16 from the reserved space at the end, leaving another
  u16 for future use.

  There has been interest in even finer tuning, namely to control the
  max stack for kernel and userspace callchains separately. Further
  discussion is needed, we may for instance use the remaining u16 for
  that and when it is present, assume that the sample_max_stack introduced
  in this patch applies for the kernel, and the u16 left is used for
  limiting the userspace callchain. (Arnaldo Carvalho de Melo)

Infrastructure:

- Adopt get_main_thread from db-export.c (Andi Kleen)

- More prep work for backward ring buffer support (Wang Nan)

- Prep work for supporting SDT (Statically Defined Tracing)
  tracepoints (Masami Hiramatsu)

- Add arch/*/include/generated/ to .gitignore (Taeung Song)

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

----------------------------------------------------------------
Andi Kleen (1):
      perf thread: Adopt get_main_thread from db-export.c

Arnaldo Carvalho de Melo (2):
      perf core: Per event callchain limit
      perf tools: Per event max-stack settings

Masami Hiramatsu (3):
      perf symbols: Introduce filename__readable to check readability
      perf symbols: Cleanup the code flow of dso__find_kallsyms
      perf buildid-cache: Use path/to/bin/buildid/elf instead of path/to/bin/buildid

Taeung Song (1):
      perf tools: Add arch/*/include/generated/ to .gitignore

Wang Nan (5):
      perf record: Robustify perf_event__synth_time_conv()
      perf evlist: Don't poll and mmap overwritable events
      perf evlist: Check 'base' pointer before checking refcnt when put a mmap
      perf evlist: Choose correct reading direction according to evlist->backward
      tools: Pass arg to fdarray__filter's call back function

 include/linux/perf_event.h      |   2 +-
 include/uapi/linux/perf_event.h |   6 ++-
 kernel/bpf/stackmap.c           |   2 +-
 kernel/events/callchain.c       |  14 ++++-
 kernel/events/core.c            |   5 +-
 tools/lib/api/fd/array.c        |   5 +-
 tools/lib/api/fd/array.h        |   3 +-
 tools/perf/.gitignore           |   1 +
 tools/perf/arch/x86/util/tsc.c  |   2 +
 tools/perf/builtin-record.c     |   9 +++-
 tools/perf/tests/fdarray.c      |   8 +--
 tools/perf/util/build-id.c      | 115 ++++++++++++++++++++++++++++++----------
 tools/perf/util/build-id.h      |   2 +
 tools/perf/util/callchain.h     |   1 +
 tools/perf/util/db-export.c     |  13 +----
 tools/perf/util/dso.h           |   5 ++
 tools/perf/util/evlist.c        |  43 +++++++++++----
 tools/perf/util/evlist.h        |   2 +
 tools/perf/util/evsel.c         |  16 +++++-
 tools/perf/util/evsel.h         |   2 +
 tools/perf/util/parse-events.c  |   8 +++
 tools/perf/util/parse-events.h  |   1 +
 tools/perf/util/parse-events.l  |   1 +
 tools/perf/util/session.c       |   2 +
 tools/perf/util/symbol.c        |  71 ++++++++++++-------------
 tools/perf/util/thread.c        |  11 ++++
 tools/perf/util/thread.h        |   2 +
 27 files changed, 252 insertions(+), 100 deletions(-)