From: Jiri Olsa <jolsa@redhat.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: acme@kernel.org, peterz@infradead.org, jolsa@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: Add top down metrics to perf stat
Date: Thu, 12 May 2016 09:47:00 +0200 [thread overview]
Message-ID: <20160512074700.GA14734@krava> (raw)
In-Reply-To: <1462489447-31832-1-git-send-email-andi@firstfloor.org>
On Thu, May 05, 2016 at 04:03:57PM -0700, Andi Kleen wrote:
SNIP
> The kernel declares the events supported by the current
> CPU and perf stat then computes the formulas based on the
> available metrics.
>
>
> Example output:
>
> $ perf stat --topdown -I 1000 cmd
> 1.000735655 frontend bound retiring bad speculation backend bound
> 1.000735655 S0-C0 2 47.84% 11.69% 8.37% 32.10%
> 1.000735655 S0-C1 2 45.53% 11.39% 8.52% 34.56%
> 2.003978563 S0-C0 2 49.47% 12.22% 8.65% 29.66%
> 2.003978563 S0-C1 2 47.21% 12.98% 8.77% 31.04%
> 3.004901432 S0-C0 2 49.35% 12.26% 8.68% 29.70%
> 3.004901432 S0-C1 2 47.23% 12.67% 8.76% 31.35%
> 4.005766611 S0-C0 2 48.44% 12.14% 8.59% 30.82%
> 4.005766611 S0-C1 2 46.07% 12.41% 8.67% 32.85%
> 5.006580592 S0-C0 2 47.91% 12.08% 8.57% 31.44%
> 5.006580592 S0-C1 2 45.57% 12.27% 8.63% 33.53%
> 6.007545125 S0-C0 2 47.45% 12.02% 8.57% 31.96%
> 6.007545125 S0-C1 2 45.13% 12.17% 8.57% 34.14%
> 7.008539347 S0-C0 2 47.07% 12.03% 8.61% 32.29%
getting -0% for bad speculation.. im on your perf/top-down-20
thanks,
jirka
[root@ibm-x3650m4-01 perf]# ./perf stat --topdown -a -I 1000
nmi_watchdog enabled with topdown. May give wrong results.
Disable with echo 0 > /proc/sys/kernel/nmi_watchdog
1.002322346 retiring bad speculation frontend bound backend bound
1.002322346 S0-C0 2 38.3% 0.0% 57.9% 3.8%
1.002322346 S0-C1 2 38.3% 0.0% 59.1% 2.6%
1.002322346 S0-C2 2 38.3% 0.0% 59.0% 2.6%
1.002322346 S0-C3 2 38.3% 0.0% 58.7% 3.0%
1.002322346 S0-C4 2 38.3% -0.0% 58.6% 3.1%
1.002322346 S0-C5 2 38.4% -0.0% 58.3% 3.3%
1.002322346 S1-C0 2 38.3% -0.0% 58.7% 3.0%
1.002322346 S1-C1 2 38.3% 0.0% 59.7% 2.0%
1.002322346 S1-C2 2 38.3% -0.0% 59.3% 2.5%
1.002322346 S1-C3 2 38.3% -0.0% 59.1% 2.5%
1.002322346 S1-C4 2 38.3% 0.0% 59.1% 2.6%
1.002322346 S1-C5 2 38.3% -0.0% 59.1% 2.7%
2.005429451 S0-C0 2 38.3% 0.0% 57.9% 3.8%
...
next prev parent reply other threads:[~2016-05-12 7:47 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-05 23:03 Add top down metrics to perf stat Andi Kleen
2016-05-05 23:03 ` [PATCH 01/10] x86: Add topology_max_smt_threads() Andi Kleen
2016-05-06 10:13 ` Peter Zijlstra
2016-05-06 10:47 ` Thomas Gleixner
2016-05-06 17:24 ` [UPDATED PATCH " Andi Kleen
2016-05-07 8:11 ` Thomas Gleixner
2016-05-12 8:07 ` Ingo Molnar
2016-05-05 23:03 ` [PATCH 02/10] x86, perf: Support sysfs files depending on SMT status Andi Kleen
2016-05-09 9:42 ` Peter Zijlstra
2016-05-09 14:27 ` Andi Kleen
2016-05-09 14:34 ` Peter Zijlstra
2016-05-12 8:05 ` Ingo Molnar
2016-05-05 23:04 ` [PATCH 03/10] x86, perf: Add Top Down events to Intel Core Andi Kleen
2016-05-11 13:23 ` Jiri Olsa
2016-05-11 13:29 ` Peter Zijlstra
2016-05-12 8:10 ` Ingo Molnar
2016-05-05 23:04 ` [PATCH 04/10] x86, perf: Add Top Down events to Intel Atom Andi Kleen
2016-05-05 23:04 ` [PATCH 05/10] x86, perf: Use new topology_max_smt_threads() in HT leak workaround Andi Kleen
2016-05-05 23:04 ` [PATCH 06/10] perf, tools, stat: Avoid fractional digits for integer scales Andi Kleen
2016-05-07 19:10 ` Jiri Olsa
2016-05-07 19:24 ` Andi Kleen
2016-05-11 13:00 ` Jiri Olsa
2016-05-11 16:43 ` Arnaldo Carvalho de Melo
2016-05-20 6:42 ` [tip:perf/urgent] perf " tip-bot for Andi Kleen
2016-05-05 23:04 ` [PATCH 07/10] perf, tools, stat: Scale values by unit before metrics Andi Kleen
2016-05-07 19:14 ` Jiri Olsa
2016-05-10 20:30 ` [tip:perf/core] perf " tip-bot for Andi Kleen
2016-05-05 23:04 ` [PATCH 08/10] perf, tools, stat: Basic support for TopDown in perf stat Andi Kleen
2016-05-05 23:04 ` [PATCH 09/10] perf, tools, stat: Add computation of TopDown formulas Andi Kleen
2016-05-05 23:04 ` [PATCH 10/10] perf, tools, stat: Add extra output of counter values with -vv Andi Kleen
2016-05-12 8:03 ` Jiri Olsa
2016-05-20 0:05 ` Andi Kleen
2016-05-12 7:47 ` Jiri Olsa [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-05-20 0:09 Add top down metrics to perf stat Andi Kleen
2016-05-14 1:44 Andi Kleen
2016-05-16 12:58 ` Jiri Olsa
2016-05-19 23:51 ` Andi Kleen
2016-05-20 9:59 ` Jiri Olsa
2016-05-20 14:18 ` Andi Kleen
2016-05-20 10:24 ` Jiri Olsa
2016-04-27 20:00 Andi Kleen
2016-04-04 20:41 Andi Kleen
2016-03-22 23:08 Andi Kleen
2016-03-27 11:27 ` Jiri Olsa
2016-03-27 15:22 ` Andi Kleen
2016-01-20 2:27 Andi Kleen
2016-01-16 1:12 Andi Kleen
2015-08-08 1:06 Andi Kleen
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