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

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Date:   Wed, 12 Apr 2017 17:46:59 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     "Jin, Yao" <yao.jin@...ux.intel.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 Wed, Apr 12, 2017 at 11:42:44PM +0800, Jin, Yao wrote:
> 
> 
> 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

sure, but it does not change the fact that the report output is broken,
we need to fix it even for the 'kill' record case

jirka