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  1. 26 1月, 2017 1 次提交
  3. 24 8月, 2016 1 次提交
  5. 19 7月, 2016 2 次提交
  7. 13 7月, 2016 1 次提交
    • A
      perf script python: Silence -Werror=maybe-uninitialized on gcc 5.3.0 · 39f54862
      由 Arnaldo Carvalho de Melo 提交于 
      Sounds like a compiler bug, but to silence it, initialize those
variables to NULL.

Noticed on:

Target: x86_64-alpine-linux-musl
Configured with: /home/buildozer/aports/main/gcc/src/gcc-5.3.0/configure
--prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info
--build=x86_64-alpine-linux-musl --host=x86_64-alpine-linux-musl
--target=x86_64-alpine-linux-musl --with-pkgversion='Alpine 5.3.0'
--enable-checking=release --disable-fixed-point --disable-libstdcxx-pch
--disable-multilib --disable-nls --disable-werror --disable-symvers
--enable-__cxa_atexit --enable-esp --enable-cloog-backend
--enable-languages=c,c++,objc,java,fortran,ada --disable-libssp
--disable-libmudflap --disable-libsanitizer --enable-shared
--enable-threads --enable-tls --with-system-zlib
Thread model: posix
gcc version 5.3.0 (Alpine 5.3.0)

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-zyvsjvbl45o7hzcuz78wu2xi@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      39f54862
  9. 12 5月, 2016 1 次提交
  11. 11 5月, 2016 1 次提交
  13. 10 5月, 2016 1 次提交
  15. 07 5月, 2016 2 次提交
    • C
      perf script: Expose usage of the callchain db export via the python api · 2c15f5eb
      由 Chris Phlipot 提交于 
      This change allows python scripts to be able to utilize the recent
changes to the db export api allowing the export of call_paths derived
from sampled callchains. These call paths are also now associated with
the samples from which they were derived.

- This feature is enabled by setting "perf_db_export_callchains" to true

- When enabled, samples that have callchain information will have the
  callchains exported via call_path_table

- The call_path_id field is added to sample_table to enable association of
  samples with the corresponding callchain stored in the call paths
  table. A call_path_id of 0 will be exported if there is no
  corresponding callchain.

- When "perf_db_export_callchains" and "perf_db_export_calls" are both
  set to True, the call path root data structure will be shared. This
  prevents duplicating of data and call path ids that would result from
  building two separate call path trees in memory.

- The call_return_processor structure definition was relocated to the header
  file to make its contents visible to db-export.c. This enables the
  sharing of call path trees between the two features, as mentioned
  above.

This change is visible to python scripts using the python db export api.

The change is backwards compatible with scripts written against the
previous API, assuming that the scripts model the sample_table function
after the one in export-to-postgresql.py script by allowing for
additional arguments to be added in the future. ie. using *x as the
final argument of the sample_table function.
Signed-off-by: NChris Phlipot <cphlipot0@gmail.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1461831551-12213-6-git-send-email-cphlipot0@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2c15f5eb
    • C
      perf tools: Refactor code to move call path handling out of thread-stack · 451db126
      由 Chris Phlipot 提交于 
      Move the call path handling code out of thread-stack.c and
thread-stack.h to allow other components that are not part of
thread-stack to create call paths.

Summary:

- Create call-path.c and call-path.h and add them to the build.

- Move all call path related code out of thread-stack.c and thread-stack.h
  and into call-path.c and call-path.h.

- A small subset of structures and functions are now visible through
  call-path.h, which is required for thread-stack.c to continue to
  compile.

This change is a prerequisite for subsequent patches in this change set
and by itself contains no user-visible changes.
Signed-off-by: NChris Phlipot <cphlipot0@gmail.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1461831551-12213-3-git-send-email-cphlipot0@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      451db126
  17. 15 4月, 2016 1 次提交
    • A
      perf callchain: Start moving away from global per thread cursors · 91d7b2de
      由 Arnaldo Carvalho de Melo 提交于 
      The recent perf_evsel__fprintf_callchain() move to evsel.c added several
new symbol requirements to the python binding, for instance:

  # perf test -v python
  16: Try 'import perf' in python, checking link problems      :
  --- start ---
  test child forked, pid 18030
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
  ImportError: /tmp/build/perf/python/perf.so: undefined symbol:
  callchain_cursor
  test child finished with -1
  ---- end ----
  Try 'import perf' in python, checking link problems: FAILED!
  #

This would require linking against callchain.c to access to the global
callchain_cursor variables.

Since lots of functions already receive as a parameter a
callchain_cursor struct pointer, make that be the case for some more
function so that we can start phasing out usage of yet another global
variable.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@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-djko3097eyg2rn66v2qcqfvn@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      91d7b2de
  19. 03 3月, 2016 1 次提交
  21. 25 2月, 2016 1 次提交
    • T
      perf script: Exception handling when the print fmt is empty · 8579aca3
      由 Taeung Song 提交于 
      After collecting samples for events 'syscalls:', perf-script with python
script doesn't occasionally work generating a segmentation fault.

The reason is that the print fmt is empty and a value of
event->print_fmt.args is NULL, so dereferencing the null pointer results
in a segmentation fault i.e.:

    # perf record -e syscalls:*
    # perf script -g python
    # perf script -s perf-script.py

    in trace_begin
    syscalls__sys_enter_brk  3 79841.832099154  3777 test.sh  syscall_nr=12, brk=0

    ... (omitted) ...

    Segmentation fault (core dumped)

For example, a format of sys_enter_getuid() hasn't
print fmt as below.

    # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_getuid/format
    name: sys_enter_getuid
    ID: 188
    format:
            field:unsigned short common_type;         offset:0; size:2; signed:0;
            field:unsigned char common_flags;         offset:2; size:1; signed:0;
            field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
            field:int common_pid;                     offset:4; size:4; signed:1;
            field:int syscall_nr;                     offset:8; size:4; signed:1;

    print fmt: ""

So add exception handling to avoid this problem.
Signed-off-by: NTaeung Song <treeze.taeung@gmail.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.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/1456413179-12331-1-git-send-email-treeze.taeung@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      8579aca3
  23. 07 1月, 2016 1 次提交
    • J
      perf script: Add python support for stat events · aef90263
      由 Jiri Olsa 提交于 
      Add support to get stat events data in perf python scripts.

The python script shall implement the following new interface to process
stat data:

  def stat__<event_name>_[<modifier>](cpu, thread, time, val, ena, run):

    - is called for every stat event for given counter,
      if user monitors 'cycles,instructions:u" following
      callbacks should be defined:

      def stat__cycles(cpu, thread, time, val, ena, run):
      def stat__instructions_u(cpu, thread, time, val, ena, run):

  def stat__interval(time):

    - is called for every interval with its time,
      in non interval mode it's called after last
      stat event with total measured time in ns

The rest of the current interface stays untouched..

Please check example CPI metrics script in following patch
with command line examples in changelogs.
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Tested-by: NKan Liang <kan.liang@intel.com>
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/1452028152-26762-8-git-send-email-jolsa@kernel.org
[ Rename 'time' parameters to 'tstamp', to fix the build in older distros ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      aef90263
  25. 29 9月, 2015 1 次提交
  27. 03 9月, 2015 1 次提交
  29. 14 5月, 2015 1 次提交
  31. 03 4月, 2015 3 次提交
  33. 24 3月, 2015 1 次提交
  35. 22 1月, 2015 1 次提交
  37. 07 11月, 2014 1 次提交
  39. 04 11月, 2014 3 次提交
  41. 29 10月, 2014 2 次提交
  43. 15 10月, 2014 1 次提交
  45. 23 8月, 2014 1 次提交
  47. 14 8月, 2014 1 次提交
  49. 17 7月, 2014 4 次提交
  51. 27 6月, 2014 2 次提交
  53. 09 6月, 2014 1 次提交
    • N
      perf script/python: Print array argument as string · e646fe73
      由 Namhyung Kim 提交于 
      With the Sebastian's change of handling num array argument (of raw
syscall enter), the script still failed to work like this:

  $ perf record -e raw_syscalls:* sleep 1
  $ perf script -g python
  $ perf script -s perf-script.py
  ...
  Traceback (most recent call last):
    File "perf-script.py", line 42, in raw_syscalls__sys_enter
      (id, args),
  TypeError: %u format: a number is required, not list
  Fatal Python error: problem in Python trace event handler
  Aborted (core dumped)

This is because the generated script tries to print the array arg as
unsigned integer (%u).  Since the python seems to convert arguments to
strings by default, just using %s solved the problem for me.
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/1401338695-18837-1-git-send-email-namhyung@kernel.orgSigned-off-by: NJiri Olsa <jolsa@kernel.org>
      e646fe73
  55. 08 6月, 2014 1 次提交
  57. 27 12月, 2013 1 次提交