Re: perf records no samples on an IBM x3250M5

Re: perf records no samples on an IBM x3250M5

[Patrick Agrain]

On Thu, 2015-12-03 at 14:26 +0000, Patrick Agrain wrote:
>> Hello,
>> 
>> perf record no samples in perf.data on an IBM x3250M5.
>> perf stat is OK (in that way that it displays some stats).

> 1) Which stats are displayed? Do the basic events from "perf list hw"
> work?

> perf stat -e cycles -- sleep 1
> perf stat -e instructions -- sleep 1

Hello,

Sorry, but I'm not familiar at all with Gmane interface. I only find this
way to answer to the questions Michael Petlan asked me.

[root@x3250-m5 tmpd]# ./perf319 stat -e cycles -- sleep 1

 Performance counter stats for 'sleep 1':

           749,662      cycles

       1.000436036 seconds time elapsed

[root@x3250-m5 tmpd]# perf stat -e instructions -- sleep 1
-bash: perf: command not found
[root@x3250-m5 tmpd]# ./perf319 stat -e instructions -- sleep 1

 Performance counter stats for 'sleep 1':

           545,304      instructions

       1.000413356 seconds time elapsed

[root@x3250-m5 tmpd]#

> 2) What does "perf list hw" show?

lines 1-7/7 (END)
  instructions                                       [Hardware event]
  cache-references                                   [Hardware event]
  cache-misses                                       [Hardware event]
  branch-instructions OR branches                    [Hardware event]
  branch-misses                                      [Hardware event]
  bus-cycles                                         [Hardware event]


Hope it helps. Thanks.
Kind regards,
Patrick Agrain

Re: perf records no samples on an IBM x3250M5

[Michael Petlan]

On Thu, 2015-12-03 at 14:26 +0000, Patrick Agrain wrote:
> Hello,
> 
> perf record no samples in perf.data on an IBM x3250M5.
> perf stat is OK (in that way that it displays some stats).

1) Which stats are displayed? Do the basic events from "perf list hw"
work?

perf stat -e cycles -- sleep 1
perf stat -e instructions -- sleep 1


2) What does "perf list hw" show?


> Before digging into the hardware, let us check together if my 'perf'
> compilation fulfills all requirements :
> 
> I tried to compile the perf inside a linux kernel 3.19 from kernel.org.
> Compilation is made on a Centos 6.6 with following info:
> 
> [root@localhost Desktop]# cat /proc/version
> Linux version 2.6.32-504.23.4.el6.i686 (mockbuild@c6b9.bsys.dev.centos.org)
> (gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) ) #1 SMP Tue Jun 9
> 18:09:42 UTC 2015
> [root@localhost Desktop]# cd /usr/src/kernels/linux-3.19/tools/perf/
> [root@localhost perf]# make
>   BUILD:   Doing 'make -j1' parallel build
> config/Makefile:128: The path 'python-config' is not executable.
> config/Makefile:390: No libunwind found. Please install libunwind-dev[el] >=
> 1.1 and/or set LIBUNWIND_DIR
> config/Makefile:494: Missing perl devel files. Disabling perl scripting
> support, consider installing perl-ExtUtils-Embed
> config/Makefile:525: No python-config tool was found
> config/Makefile:525: Python support will not be built
> config/Makefile:627: No numa.h found, disables 'perf bench numa mem'
> benchmark, please install numactl-devel/libnuma-devel/libnuma-dev
> 
> Auto-detecting system features:
> ...                         dwarf: [ on  ]
> ...                         glibc: [ on  ]
> ...                          gtk2: [ on  ]
> ...                      libaudit: [ on  ]
> ...                        libbfd: [ on  ]
> ...                        libelf: [ on  ]
> ...                       libnuma: [ OFF ]
> ...                       libperl: [ OFF ]
> ...                     libpython: [ OFF ]
> ...                      libslang: [ on  ]
> ...                     libunwind: [ OFF ]
> ...            libdw-dwarf-unwind: [ on  ]
> ...                          zlib: [ on  ]
> ...     DWARF post unwind library: libdw
> 
>   CC       perf.o
>   LINK     perf
>   GEN      perf-archive
>   GEN      perf-with-kcore
> [root@localhost perf]#
> 
> Do you see here anything unusual (or wrong, or missing) ?
> FYI, I saw no error message during compilation.
> 
> Thanks.
> Kind regards,
> Patrick Agrain
> 
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perf records no samples on an IBM x3250M5

[Patrick Agrain]

Hello,

perf record no samples in perf.data on an IBM x3250M5.
perf stat is OK (in that way that it displays some stats).
Before digging into the hardware, let us check together if my 'perf'
compilation fulfills all requirements :

I tried to compile the perf inside a linux kernel 3.19 from kernel.org.
Compilation is made on a Centos 6.6 with following info:

[root@localhost Desktop]# cat /proc/version
Linux version 2.6.32-504.23.4.el6.i686 (mockbuild@c6b9.bsys.dev.centos.org)
(gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) ) #1 SMP Tue Jun 9
18:09:42 UTC 2015
[root@localhost Desktop]# cd /usr/src/kernels/linux-3.19/tools/perf/
[root@localhost perf]# make
  BUILD:   Doing 'make -j1' parallel build
config/Makefile:128: The path 'python-config' is not executable.
config/Makefile:390: No libunwind found. Please install libunwind-dev[el] >=
1.1 and/or set LIBUNWIND_DIR
config/Makefile:494: Missing perl devel files. Disabling perl scripting
support, consider installing perl-ExtUtils-Embed
config/Makefile:525: No python-config tool was found
config/Makefile:525: Python support will not be built
config/Makefile:627: No numa.h found, disables 'perf bench numa mem'
benchmark, please install numactl-devel/libnuma-devel/libnuma-dev

Auto-detecting system features:
...                         dwarf: [ on  ]
...                         glibc: [ on  ]
...                          gtk2: [ on  ]
...                      libaudit: [ on  ]
...                        libbfd: [ on  ]
...                        libelf: [ on  ]
...                       libnuma: [ OFF ]
...                       libperl: [ OFF ]
...                     libpython: [ OFF ]
...                      libslang: [ on  ]
...                     libunwind: [ OFF ]
...            libdw-dwarf-unwind: [ on  ]
...                          zlib: [ on  ]
...     DWARF post unwind library: libdw

  CC       perf.o
  LINK     perf
  GEN      perf-archive
  GEN      perf-with-kcore
[root@localhost perf]#

Do you see here anything unusual (or wrong, or missing) ?
FYI, I saw no error message during compilation.

Thanks.
Kind regards,
Patrick Agrain