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Date: Thu, 17 Dec 2015 15:57:07 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Jiri Olsa <jolsa@...nel.org>
Cc: lkml <linux-kernel@...r.kernel.org>,
David Ahern <dsahern@...il.com>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
"Liang, Kan" <kan.liang@...el.com>
Subject: Re: [PATCH 17/25] perf stat report: Move csv_sep initialization
before report command
Em Thu, Nov 05, 2015 at 03:41:01PM +0100, Jiri Olsa escreveu:
> So we have csv_sep properly initialized before
> report command leg.
I moved this to before "perf stat report: Process stat and stat round
events" so that what you wrote above makes sense, i.e. after this patch
nothing is produced by 'perf stat report' and right after the stat and
stat round one is applied I get:
[acme@...andy linux]$ perf stat report
Performance counter stats for '/home/acme/bin/perf stat record usleep 1':
0.411636 task-clock (msec) # 0.571 CPUs utilized
2 context-switches # 0.005 M/sec
0 cpu-migrations # 0.000 K/sec
149 page-faults # 0.362 M/sec
1,291,807 cycles # 3.138 GHz
959,632 stalled-cycles-frontend # 74.29% frontend cycles idle
703,170 stalled-cycles-backend # 54.43% backend cycles idle
757,538 instructions # 0.59 insns per cycle
# 1.27 stalled cycles per insn
133,293 branches # 323.813 M/sec
<not counted> branch-misses (0.00%)
0.000720394 seconds time elapsed
[acme@...andy linux]$
And not this ugly thing:
[acme@...andy linux]$ perf stat report
Performance counter stats for '/home/acme/bin/perf stat record usleep 1':
0.411636(null) (null)task-clock (msec) # 0.571 CPUs utilized
2(null) (null)context-switches # 0.005 M/sec
0(null) (null)cpu-migrations # 0.000 K/sec
149(null) (null)page-faults # 0.362 M/sec
1,291,807(null) (null)cycles # 3.138 GHz
959,632(null) (null)stalled-cycles-frontend # 74.29% frontend cycles idle
703,170(null) (null)stalled-cycles-backend # 54.43% backend cycles idle
757,538(null) (null)instructions # 0.59 insns per cycle
# 1.27 stalled cycles per insn
133,293(null) (null)branches # 323.813 M/sec
<not counted>(null) (null)branch-misses (0.00%)
0.000720394 seconds time elapsed
[acme@...andy linux]$
- Arnaldo
> Tested-by: Kan Liang <kan.liang@...el.com>
> Link: http://lkml.kernel.org/n/tip-i5mmbomj7lt4eg04awzocdd4@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
> tools/perf/builtin-stat.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 6636d29b3b18..174ffbd02a13 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1776,6 +1776,13 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
> (const char **) stat_usage,
> PARSE_OPT_STOP_AT_NON_OPTION);
>
> + if (csv_sep) {
> + csv_output = true;
> + if (!strcmp(csv_sep, "\\t"))
> + csv_sep = "\t";
> + } else
> + csv_sep = DEFAULT_SEPARATOR;
> +
> if (argc && !strncmp(argv[0], "rec", 3)) {
> argc = __cmd_record(argc, argv);
> if (argc < 0)
> @@ -1826,13 +1833,6 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
>
> stat_config.output = output;
>
> - if (csv_sep) {
> - csv_output = true;
> - if (!strcmp(csv_sep, "\\t"))
> - csv_sep = "\t";
> - } else
> - csv_sep = DEFAULT_SEPARATOR;
> -
> /*
> * let the spreadsheet do the pretty-printing
> */
> --
> 2.4.3
--
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