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Message-ID: <20191107092818.GB14657@krava>
Date: Thu, 7 Nov 2019 10:28:18 +0100
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
Subject: Re: [PATCH v7 0/7] perf report: Support sorting all blocks by cycles
On Thu, Nov 07, 2019 at 03:47:12PM +0800, Jin Yao wrote:
> It would be useful to support sorting for all blocks by the
> sampled cycles percent per block. This is useful to concentrate
> on the globally hottest blocks.
>
> This patch series implements a new option "--total-cycles" which
> sorts all blocks by 'Sampled Cycles%'. The 'Sampled Cycles%' is
> block sampled cycles aggregation / total sampled cycles
>
> For example,
>
> perf record -b ./div
> perf report --total-cycles --stdio
>
> # To display the perf.data header info, please use --header/--header-only options.
> #
> #
> # Total Lost Samples: 0
> #
> # Samples: 2M of event 'cycles'
> # Event count (approx.): 2753248
> #
> # Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles [Program Block Range] Shared Object
> # ............... .............. ........... .......... ................................................................. ....................
> #
> 26.04% 2.8M 0.40% 18 [div.c:42 -> div.c:39] div
> 15.17% 1.2M 0.16% 7 [random_r.c:357 -> random_r.c:380] libc-2.27.so
> 5.11% 402.0K 0.04% 2 [div.c:27 -> div.c:28] div
> 4.87% 381.6K 0.04% 2 [random.c:288 -> random.c:291] libc-2.27.so
> 4.53% 381.0K 0.04% 2 [div.c:40 -> div.c:40] div
> 3.85% 300.9K 0.02% 1 [div.c:22 -> div.c:25] div
> 3.08% 241.1K 0.02% 1 [rand.c:26 -> rand.c:27] libc-2.27.so
> 3.06% 240.0K 0.02% 1 [random.c:291 -> random.c:291] libc-2.27.so
> 2.78% 215.7K 0.02% 1 [random.c:298 -> random.c:298] libc-2.27.so
> 2.52% 198.3K 0.02% 1 [random.c:293 -> random.c:293] libc-2.27.so
> 2.36% 184.8K 0.02% 1 [rand.c:28 -> rand.c:28] libc-2.27.so
> 2.33% 180.5K 0.02% 1 [random.c:295 -> random.c:295] libc-2.27.so
> 2.28% 176.7K 0.02% 1 [random.c:295 -> random.c:295] libc-2.27.so
> 2.20% 168.8K 0.02% 1 [rand@...+0 -> rand@...+0] div
> 1.98% 158.2K 0.02% 1 [random_r.c:388 -> random_r.c:388] libc-2.27.so
> 1.57% 123.3K 0.02% 1 [div.c:42 -> div.c:44] div
> 1.44% 116.0K 0.42% 19 [random_r.c:357 -> random_r.c:394] libc-2.27.so
> ......
>
> This patch series supports both stdio and tui. And also with the supporting
> of --percent-limit.
>
> v7:
> ---
> Use use_browser in report__browse_block_hists and support
> reporting for both stdio and tui modes.
>
> Move block tui browser code from ui/browsers/hists.c
> to block-info.c.
thanks for bearing with me ;-)
Reviewed-by: Jiri Olsa <jolsa@...nel.org>
jirka
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