linux-kernel - Re: [RFC/PATCHSET 00/17] perf tools: Add support for hierachy view (v2)

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Date:	Tue, 19 Jan 2016 17:59:41 -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>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>,
	Don Zickus <dzickus@...hat.com>,
	Pekka Enberg <penberg@...nel.org>,
	Moinuddin Quadri <moin18@...il.com>
Subject: Re: [RFC/PATCHSET 00/17] perf tools: Add support for hierachy view
 (v2)

Em Sun, Jan 17, 2016 at 01:03:00AM +0900, Namhyung Kim escreveu:
> Hello,
> 
> This is v2 attempt of my earlier patchset [1].  This patchset
> implements a new feature that collects hist entries in a hierachical
> manner.  That means lower-level entries belong to an upper-level
> entry.  The entry hierachy is built on the sort keys given, so users
> can set it whatever they want.  It only shows top-level entries first,
> and user can expand/collapse it dynamically.
> 
> This time I implemented it for every output browser including TUI.
> A screenshot on TUI looks like below:
> 
> For normal output:
> 
>   $ perf report --tui
>   Samples: 3K of event 'cycles:pp', Event count (approx.): 1695979674
>     Overhead  Command        Shared Object         Symbol
>   ------------------------------------------------------------------------
>   -    7.57%  swapper        [kernel.vmlinux]      [k] intel_idle
>        intel_idle
>        cpuidle_enter_state
>        cpuidle_enter
>        call_cpuidle
>      + cpu_startup_entry
>   +    1.16   firefox        firefox               [.] 0x00000000000019433
>   +    0.97%  firefox        libpthread-2.22.so    [.] pthread_mutex_lock
>   ...
> 
> 
> With hierarchy view,

Ok, tested, this is really nice, I think it should be the default, from
where to drill down, we could have a '--no-hierarchy', Ingo?

I'll took a quick look patch by patch, seems ok, will try to look deeper
to get this merged soon,

keep up the great work!

- Arnaldo
 
>   $ perf report --tui --hierarchy
>   Samples: 3K of event 'cycles:pp', Event count (approx.): 1695979674
>    Overhead        Command / Shared Object / Symbol
>   -------------------------------------------------------------------
>   +  76.30%        firefox
>   -   9.95%        swapper
>      -   9.51%        [kernel.vmlinux]
>         -   7.57         [k] intel_idle
> 	     intel_idle
> 	     cpuidle_enter_state
> 	     cpuidle_enter
> 	     call_cpuidle
> 	   + cpu_startup_entry
> 	+   0.15%        [k] __schedule
> 	+   0.12%        [k] menu_select
> 	...
>      +   0.34%        [sdhci]
>      +   0.06%        [e1000e]
>      ...
>  +    5.65%        Xorg
>  +    5.42%        Socket Thread
>  ...
> 
> As you can see, overhead of an upper level entry is the sum of
> overhead of lower level entries.  The entries are aligned by its order
> of matching sort keys.
> 
> This is available from 'perf/hierarchy-v2' branch in my tree:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung-perf.git
> 
> 
> Any comments are welcome, thanks!
> Namhyung
> 
> 
> Cc: Don Zickus <dzickus@...hat.com>
> Cc: Pekka Enberg <penberg@...nel.org>
> Cc: Moinuddin Quadri <moin18@...il.com>
> 
> 
> [1] https://lkml.org/lkml/2013/5/21/24
> 
> 
> Namhyung Kim (17):
>   perf hists: Basic support of hierarchical report view
>   perf hists: Resort hist entries with hierarchy
>   perf hists: Add helper functions for hierarchy mode
>   perf hists: Cleanup filtering functions
>   perf hists: Support filtering in hierarchy mode
>   perf ui/stdio: Implement hierarchy output mode
>   perf ui/stdio: Align column header for hierarchy output
>   perf hists browser: Fix context menu item
>   perf hists browser: Count number of hierarchy entries
>   perf hists browser: Support collapsing/expanding whole entries in
>     hierarchy
>   perf hists browser: Factor out hist_browser__show_callchain()
>   perf hists browser: Implement hierarchy output
>   perf hists browser: Align column header in hierarchy mode
>   perf ui/gtk: Implement hierarchy output mode
>   perf report: Add --hierarchy option
>   perf hists: Support decaying in hierarchy mode
>   perf top: Add --hierarchy option
> 
>  tools/perf/Documentation/perf-report.txt |   3 +
>  tools/perf/Documentation/perf-top.txt    |   3 +
>  tools/perf/Documentation/tips.txt        |   1 +
>  tools/perf/builtin-report.c              |  17 +
>  tools/perf/builtin-top.c                 |  15 +
>  tools/perf/ui/browsers/hists.c           | 590 ++++++++++++++++++++++++++-----
>  tools/perf/ui/gtk/hists.c                | 161 ++++++++-
>  tools/perf/ui/hist.c                     |  14 +
>  tools/perf/ui/stdio/hist.c               | 182 +++++++++-
>  tools/perf/util/hist.c                   | 470 ++++++++++++++++++++----
>  tools/perf/util/hist.h                   |  11 +
>  tools/perf/util/sort.c                   | 116 ++++++
>  tools/perf/util/sort.h                   |  16 +-
>  tools/perf/util/symbol.h                 |   3 +-
>  14 files changed, 1437 insertions(+), 165 deletions(-)
> 
> -- 
> 2.6.4