linux-kernel - Re: [PATCH v4 0/5] perf report: Show branch type

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Date:   Wed, 12 Apr 2017 23:42:44 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v4 0/5] perf report: Show branch type



On 4/12/2017 10:26 PM, Jiri Olsa wrote:
> On Wed, Apr 12, 2017 at 08:25:34PM +0800, Jin, Yao wrote:
>
> SNIP
>
>>> # Overhead  Command  Source Shared Object  Source Symbol                            Target Symbol                            Basic Block Cycles
>>> # ........  .......  ....................  .......................................  .......................................  ..................
>>> #
>>>        8.30%  perf
>>> Um  [kernel.vmlinux]      [k] __intel_pmu_enable_all.constprop.17  [k] native_write_msr                     -
>>>        7.91%  perf
>>> Um  [kernel.vmlinux]      [k] intel_pmu_lbr_enable_all             [k] __intel_pmu_enable_all.constprop.17  -
>>>        7.91%  perf
>>> Um  [kernel.vmlinux]      [k] native_write_msr                     [k] intel_pmu_lbr_enable_all             -
>>>        6.32%  kill     libc-2.24.so          [.] _dl_addr                             [.] _dl_addr                             -
>>>        5.93%  perf
>>> Um  [kernel.vmlinux]      [k] perf_iterate_ctx                     [k] perf_iterate_ctx                     -
>>>        2.77%  kill     libc-2.24.so          [.] malloc                               [.] malloc                               -
>>>        1.98%  kill     libc-2.24.so          [.] _int_malloc                          [.] _int_malloc                          -
>>>        1.58%  kill     [kernel.vmlinux]      [k] __rb_insert_augmented                [k] __rb_insert_augmented                -
>>>        1.58%  perf
>>> Um  [kernel.vmlinux]      [k] perf_event_exec                      [k] perf_event_exec                      -
>>>        1.19%  kill     [kernel.vmlinux]      [k] anon_vma_interval_tree_insert        [k] anon_vma_interval_tree_insert        -
>>>        1.19%  kill     [kernel.vmlinux]      [k] free_pgd_range                       [k] free_pgd_range                       -
>>>        1.19%  kill     [kernel.vmlinux]      [k] n_tty_write                          [k] n_tty_write                          -
>>>        1.19%  perf
>>> Um  [kernel.vmlinux]      [k] native_sched_clock                   [k] sched_clock                          -
>>> ...
>>> SNIP
>>>
>>>
>>> jirka
>> Hi,
>>
>> Thanks so much for trying this patch.
>>
>> The branch statistics is printed at the end of perf report --stdio.
> yep, but for some reason with your changes the head report
> got changed as well, I haven't checked the details yet..
>
> jirka

The kill returns immediately with no parameter error. Could you try an 
application which can run for a while?

For example:
perf record -j any,save_type top

Thanks
Jin Yao