linux-kernel - Re: [PATCHSET 0/8] perf tools: Support multiple keys in a single hierarchy level (v1)

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Date:	Wed, 2 Mar 2016 13:25:07 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCHSET 0/8] perf tools: Support multiple keys in a single
 hierarchy level (v1)

Em Thu, Mar 03, 2016 at 01:12:00AM +0900, Namhyung Kim escreveu:
> Hello,
> 
> This implements what Arnaldo suggested in previous discussion of
> hierarchy patchset [1].  Originally each level in a hierarchy can have
> a single sort key in it, but with patches it's possible to have more
> than one sort keys.  I added the struct perf_hpp_list_node and carry
> it to group output formats (hpp_fmt) in a single level.
> 
> I used ':' character instead of '+' as suggested since the '+' was
> also used to extend existing sort keys (like -s '+cpu').

Could we use ';' instead? That is associated with lists as well, i.e.:

  perf report --hierarchy -s prev_pid;prev_comm,next_pid;next_comm

What do you think? Others?

But anyway, thanks for working on this, I'll try and test it,

- Arnaldo
 
> Example below shows how 4 sort keys are used for 2 levels.  As you can
> see, the first level shows pid and comm of previous (switched) task
> and the second level shows pid and comm of next task.
> 
>   $ perf report --hierarchy -s prev_pid:prev_comm,next_pid:next_comm \
>    --percent-limit 1 -i perf.data.sched
>   ...
>   #    Overhead  prev_pid+prev_comm / next_pid+next_comm
>   # ...........  .......................................
>   #
>       22.36%     0  swapper/0
>           9.48%     17773  transmission-gt
>           5.25%     109  kworker/0:1H
>           1.53%     6524  Xephyr
>       21.39%     17773  transmission-gt
>           9.52%     0  swapper/0
>           9.04%     0  swapper/2
>           1.78%     0  swapper/3
> 
> 
> It's available on the 'perf/hierarchy-multi-v1' branch in my tree
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
> 
> 
> Any feedbacks are welcome
> 
> Thanks,
> Namhyung
> 
> 
> [1] https://lkml.org/lkml/2016/2/24/1041
> 
> 
> Namhyung Kim (8):
>   perf tools: Add level field to struct perf_hpp_fmt
>   perf tools: Introduce perf_hpp__setup_hists_formats()
>   perf tools: Use own hpp_list for hierarchy mode
>   perf tools: Support multiple sort keys in a hierarchy
>   perf tools: Fix indent for multiple hierarchy sort key
>   perf report: Use hierarchy hpp list on stdio
>   perf hists browser: Use hierarchy hpp list
>   perf report: Use hierarchy hpp list on gtk
> 
>  tools/perf/ui/browsers/hists.c | 147 +++++++++++++++++++----------------
>  tools/perf/ui/gtk/hists.c      |  73 +++++++++++-------
>  tools/perf/ui/hist.c           |  67 ++++++++++++++++
>  tools/perf/ui/stdio/hist.c     | 171 +++++++++++++++++++++--------------------
>  tools/perf/util/hist.c         |  81 +++++++++++++------
>  tools/perf/util/hist.h         |  12 +++
>  tools/perf/util/sort.c         | 123 ++++++++++++++++++++---------
>  tools/perf/util/sort.h         |   1 +
>  8 files changed, 438 insertions(+), 237 deletions(-)
> 
> -- 
> 2.7.1