Re: [GIT PULL 00/13] perf/core improvements and fixes

[Adrian Hunter <adrian.hunter@intel.com>]

On 09/09/2014 07:59 AM, Ingo Molnar wrote:
> 
> * Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> 
>> Hi Ingo,
>>
>> 	Please consider pulling,
>>
>> - Arnaldo
>>
>> The following changes since commit 39b5a56ec0be5effe9b7d0f18cb27724bf2e5d47:
>>
>>   Merge branch 'rfc/perf' into perf/core, because it's ready for inclusion (2014-08-24 22:35:42 +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
>>
>> for you to fetch changes up to fa3480cb0a96c8af9ded1a8c836c91bd5704bda1:
>>
>>   perf tools: Add perf_pmu__scan_file() (2014-09-08 17:16:06 -0300)
>>
>> ----------------------------------------------------------------
>> perf/core improvements and fixes:
>>
>> User visible:
>>
>> o Add +field argument support for --sort option (Jiri Olsa)
>>
>> Infrastructure:
>>
>> o More intel PT prep work, from Adrian Hunter, including:
>>
>>   - Let a user specify a PMU event without any config terms
>>   - Add perf-with-kcore script
>>   - Build programs to copy 32-bit compatibility VDSOs
>>   - Add support for 32-bit compatibility VDSOs
>>   - Let default config be defined for a PMU
>>   - Add perf_pmu__scan_file()
>>
>> o Add feature checks to .gitignore (Alexander Shishkin)
>>
>> o "perf kvm stat report" improvements by Alexander Yarygin:
>>   o  Save pid string in opts.target.pid
>>   o  Enable the target.system_wide flag
>>   o  Unify the title bar output
>>
>> o Fix build issue on powerpc when DWARF support is disabled (Anton Blanchard)
>>
>> o Allow to specify lib compile variable for spec usage (Jiri Olsa)
>>
>> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>>
>> ----------------------------------------------------------------
>> Adrian Hunter (6):
>>       perf tools: Let a user specify a PMU event without any config terms
>>       perf tools: Add perf-with-kcore script
>>       perf tools: Build programs to copy 32-bit compatibility VDSOs
>>       perf tools: Add support for 32-bit compatibility VDSOs
>>       perf tools: Let default config be defined for a PMU
>>       perf tools: Add perf_pmu__scan_file()
>>
>> Alexander Shishkin (1):
>>       perf tools: Add feature checks to .gitignore
>>
>> Alexander Yarygin (3):
>>       perf kvm stat report: Save pid string in opts.target.pid
>>       perf kvm stat report: Enable the target.system_wide flag
>>       perf kvm stat report: Unify the title bar output
>>
>> Anton Blanchard (1):
>>       perf tools powerpc: Fix build issue when DWARF support is disabled
>>
>> Jiri Olsa (2):
>>       perf tools: Add +field argument support for --sort option
>>       perf tools: Allow to specify lib compile variable for spec usage
>>
>>  tools/perf/.gitignore            |   2 +
>>  tools/perf/Makefile.perf         |  42 ++++++-
>>  tools/perf/arch/powerpc/Makefile |   2 +-
>>  tools/perf/builtin-kvm.c         |  23 ++--
>>  tools/perf/config/Makefile       |  33 ++++-
>>  tools/perf/config/Makefile.arch  |   8 ++
>>  tools/perf/perf-read-vdso.c      |  59 +++++++++
>>  tools/perf/perf-with-kcore.sh    | 259 +++++++++++++++++++++++++++++++++++++++
>>  tools/perf/tests/pmu.c           |   2 +-
>>  tools/perf/util/kvm-stat.h       |   1 -
>>  tools/perf/util/parse-events.c   |  13 +-
>>  tools/perf/util/parse-events.y   |  10 ++
>>  tools/perf/util/pmu.c            |  79 +++++++++---
>>  tools/perf/util/pmu.h            |  12 +-
>>  tools/perf/util/sort.c           |  37 +++++-
>>  tools/perf/util/vdso.c           | 170 ++++++++++++++++++++++++-
>>  tools/perf/util/vdso.h           |   4 +-
>>  17 files changed, 712 insertions(+), 44 deletions(-)
>>  create mode 100644 tools/perf/perf-read-vdso.c
>>  create mode 100644 tools/perf/perf-with-kcore.sh
> 
> Hm, so I'm getting this error, when trying to profile a 32-bit 
> ELF binary on a 64-bit kernel, on a testbox:
> 
>  $ perf record ~/hackbench  10
>  Time: 0.115
>  [ perf record: Woken up 1 times to write data ]
>  [ perf record: Captured and wrote 0.373 MB perf.data (~16279 samples) ]
>  sh: perf-read-vdso32: command not found

Presumably perf-read-vdso32 is not in the PATH.  Did you 'make install'?

> 
> comet:~/tip> file ~/hackbench 
> /home/mingo/hackbench: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped
> 
> 64-bit executables work fine:
> 
>  $ perf record perf bench sched pipe
>  # Running 'sched/pipe' benchmark:
>  # Executed 1000000 pipe operations between two processes
> 
>       Total time: 13.374 [sec]
> 
>        13.374352 usecs/op
>            74769 ops/sec
>  [ perf record: Woken up 14 times to write data ]
>  [ perf record: Captured and wrote 3.602 MB perf.data (~157354 samples) ]
> 
> The kernel is an older one:
> 
>  $ uname -a
>  Linux comet 3.14.17-100.fc19.x86_64 #1 SMP Thu Aug 14 17:17:26 
>  UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
> 
> Thanks,
> 
> 	Ingo
> 
>