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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
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%           
     ...

  parent reply index

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-05 23:03 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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