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Date: Wed, 9 May 2018 13:42:51 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Jin Yao <yao.jin@...ux.intel.com>
Cc: 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] perf annotate: Display multiple events for --stdio
Em Wed, May 09, 2018 at 11:57:15PM +0800, Jin Yao escreveu:
> When we perform following command lines:
>
> perf record -e "{cycles,branches}" ./div
> perf annotate main --stdio
>
> Only shows one event "cycles" and the displaying format is not correct.
>
> Percent | Source code & Disassembly of div for cycles (44550 samples)
> -----------------------------------------------------------------------------------
Please indent command output (two spaces before all lines) to avoid
scripts breaking due to mistaking lines starting with --- as the end of
the patch.
Applying.
- Arnaldo
> :
> :
> :
> : Disassembly of section .text:
> :
> : 00000000004004b0 <main>:
> : main():
> :
> : return i;
> : }
> :
> : int main(void)
> : {
> 0.00 : 4004b0: push %rbx
> : int i;
> : int flag;
> : volatile double x = 1212121212, y = 121212;
> :
> : s_randseed = time(0);
> 0.00 : 4004b1: xor %edi,%edi
> : srand(s_randseed);
> 0.00 : 4004b3: mov $0x77359400,%ebx
> :
> : return i;
> : }
> :
>
> The issue is the value of nr_percent is hardcoded to 1.
> This patch fixes it.
>
> With this patch, the output is:
>
> Percent | Source code & Disassembly of div for cycles (44550 samples)
> -----------------------------------------------------------------------------------
> :
> :
> :
> : Disassembly of section .text:
> :
> : 00000000004004b0 <main>:
> : main():
> :
> : return i;
> : }
> :
> : int main(void)
> : {
> 0.00 0.00 : 4004b0: push %rbx
> : int i;
> : int flag;
> : volatile double x = 1212121212, y = 121212;
> :
> : s_randseed = time(0);
> 0.00 0.00 : 4004b1: xor %edi,%edi
> : srand(s_randseed);
> 0.00 0.00 : 4004b3: mov $0x77359400,%ebx
> :
> : return i;
> : }
>
> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> ---
> tools/perf/util/annotate.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 536ee14..5d74a30 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -1263,6 +1263,9 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
> max_percent = sample->percent;
> }
>
> + if (al->samples_nr > nr_percent)
> + nr_percent = al->samples_nr;
> +
> if (max_percent < min_pcnt)
> return -1;
>
> --
> 2.7.4
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