From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: peterz@infradead.org, jolsa@kernel.org,
linux-kernel@vger.kernel.org, mingo@kernel.org,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 11/11] perf, tools, stat: Add extra output of counter values with -v
Date: Wed, 6 Apr 2016 11:32:20 -0300 [thread overview]
Message-ID: <20160406143220.GD5945@kernel.org> (raw)
In-Reply-To: <1459802514-31501-12-git-send-email-andi@firstfloor.org>
Em Mon, Apr 04, 2016 at 01:41:54PM -0700, Andi Kleen escreveu:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add debug output of raw counter values per CPU when
> perf stat -v is specified, together with their cpu numbers.
> This is very useful to debug problems with per core counters,
> where we can normally only see aggregated values.
Can we do it only when per CPU is in place?
[acme@jouet linux]$ perf stat -v usleep 1
task-clock: 0: 1426718 1426718 1426718
task-clock: 1426718 1426718 1426718
context-switches: 0: 3 1426718 1426718
context-switches: 3 1426718 1426718
cpu-migrations: 0: 1 1426718 1426718
cpu-migrations: 1 1426718 1426718
page-faults: 0: 52 1426718 1426718
page-faults: 52 1426718 1426718
cycles: 0: 4338775 1437628 1437628
cycles: 4338775 1437628 1437628
instructions: 0: 754838 1437628 1437628
instructions: 754838 1437628 1437628
branches: 0: 146638 1437628 1437628
branches: 146638 1437628 1437628
branch-misses: 0: 7871 1437628 1437628
branch-misses: 7871 1437628 1437628
Performance counter stats for 'usleep 1':
1.426718 task-clock (msec) # 0.370 CPUs utilized
3 context-switches # 0.002 M/sec
1 cpu-migrations # 0.701 K/sec
52 page-faults # 0.036 M/sec
4,338,775 cycles # 3.041 GHz
754,838 instructions # 0.17 insn per cycle
146,638 branches # 102.780 M/sec
7,871 branch-misses # 5.37% of all branches
0.003859416 seconds time elapsed
[acme@jouet linux]$
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
> ---
> tools/perf/builtin-stat.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 6d8ce72cd8c1..0ee224b80056 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -314,6 +314,14 @@ static int read_counter(struct perf_evsel *counter)
> return -1;
> }
> }
> +
> + if (verbose) {
> + fprintf(stat_config.output,
> + "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
> + perf_evsel__name(counter),
> + cpu,
> + count->val, count->ena, count->run);
> + }
> }
> }
>
> --
> 2.5.5
next prev parent reply other threads:[~2016-04-06 14:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-04 20:41 Add top down metrics to perf stat Andi Kleen
2016-04-04 20:41 ` [PATCH 01/11] x86, perf: Support sysfs files depending on SMT status Andi Kleen
2016-04-04 20:41 ` [PATCH 02/11] x86, perf: Add Top Down events to Intel Core Andi Kleen
2016-04-04 20:41 ` [PATCH 03/11] x86, perf: Add Top Down events to Intel Atom Andi Kleen
2016-04-04 20:41 ` [PATCH 04/11] x86, perf: Use new ht_on flag in HT leak workaround Andi Kleen
2016-04-04 20:41 ` [PATCH 05/11] perf, tools: Parse an .aggr-per-core event attribute Andi Kleen
2016-04-04 20:41 ` [PATCH 06/11] perf, tools, stat: Force --per-core mode for .aggr-per-core aliases Andi Kleen
2016-04-04 20:41 ` [PATCH 07/11] perf, tools, stat: Avoid fractional digits for integer scales Andi Kleen
2016-04-04 20:41 ` [PATCH 08/11] perf, tools, stat: Scale values by unit before metrics Andi Kleen
2016-04-04 20:41 ` [PATCH 09/11] perf, tools, stat: Basic support for TopDown in perf stat Andi Kleen
2016-04-04 20:41 ` [PATCH 10/11] perf, tools, stat: Add computation of TopDown formulas Andi Kleen
2016-04-04 20:41 ` [PATCH 11/11] perf, tools, stat: Add extra output of counter values with -v Andi Kleen
2016-04-06 14:32 ` Arnaldo Carvalho de Melo [this message]
2016-04-06 15:10 ` Andi Kleen
2016-04-06 15:14 ` Arnaldo Carvalho de Melo
-- strict thread matches above, loose matches on Subject: below --
2016-03-22 23:08 Add top down metrics to perf stat Andi Kleen
2016-03-22 23:08 ` [PATCH 11/11] perf, tools, stat: Add extra output of counter values with -v Andi Kleen
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