linux-kernel - Re: [PATCH v3 5/5] perf report: Sort by sampled cycles percent per block for tui

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Message-ID: <20191023113656.GP22919@krava>
Date:   Wed, 23 Oct 2019 13:36:56 +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
Subject: Re: [PATCH v3 5/5] perf report: Sort by sampled cycles percent per
 block for tui

On Tue, Oct 22, 2019 at 04:07:10PM +0800, Jin Yao wrote:
> Previous patch has implemented a new sort option "total_cycles".
> But there was only stdio mode supported.
> 
> This patch supports the tui mode and support '--percent-limit'.
> 
> For example,
> 
>  perf record -b ./div
>  perf report -s total_cycles --percent-limit 1
> 
>  # Samples: 2753248 of event 'cycles'
>  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
> 
>  v3:
>  ---
>  Minor change since the function name is changed:
>  block_total_cycles_percent -> block_info__total_cycles_percent
> 
> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> ---
>  tools/perf/builtin-report.c    | 30 +++++++++++++---
>  tools/perf/ui/browsers/hists.c | 62 +++++++++++++++++++++++++++++++++-
>  tools/perf/ui/browsers/hists.h |  2 ++
>  tools/perf/util/hist.h         | 12 +++++++
>  4 files changed, 101 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index dbae1812ce47..707512f177cb 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -800,6 +800,27 @@ static int hists__fprintf_all_blocks(struct hists *hists, struct report *rep)
>  	return 0;
>  }
>  
> +static int perf_evlist__tui_block_hists_browse(struct evlist *evlist,
> +					       struct report *rep)
> +{
> +	struct block_hist *bh = &rep->block_hist;
> +	struct evsel *pos;
> +	int ret;
> +
> +	evlist__for_each_entry(evlist, pos) {
> +		struct hists *hists = evsel__hists(pos);
> +
> +		get_block_hists(hists, bh, rep);

same here, this is display function, compute the data before

thanks,
jirka

> +		symbol_conf.report_individual_block = true;
> +		ret = block_hists_tui_browse(bh, pos, rep->min_percent);
> +		hists__delete_entries(&bh->block_hists);
> +		if (ret != 0)
> +			return ret;
> +	}
> +
> +	return ret;
> +}

SNIP