linux-kernel - Re: [tip:perf/core] perf/x86/intel/P4: Robistify P4 PMU types

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Message-ID: <20130426163952.GC15361@pd.tnic>
Date:	Fri, 26 Apr 2013 18:39:52 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
Cc:	mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, a.p.zijlstra@...llo.nl,
	tytso@....edu, davem@...emloft.net, fweisbec@...il.com,
	oleg@...hat.com, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] perf/x86/intel/P4: Robistify P4 PMU types

On Fri, Apr 26, 2013 at 08:24:44PM +0400, Cyrill Gorcunov wrote:
> And if possible some branch instructions testing.

By that you mean, see whether it counts branches?

./perf stat sleep 0

 Performance counter stats for 'sleep 0':

          2.483869 task-clock                #    0.463 CPUs utilized
                 1 context-switches          #    0.403 K/sec
                 0 cpu-migrations            #    0.000 K/sec
               168 page-faults               #    0.068 M/sec
         3,435,630 cycles                    #    1.383 GHz
           736,680 stalled-cycles-frontend   #   21.44% frontend cycles idle
           656,603 stalled-cycles-backend    #   19.11% backend  cycles idle
         2,932,775 instructions              #    0.85  insns per cycle
                                             #    0.25  stalled cycles per insn
           590,855 branches                  #  237.877 M/sec
            12,882 branch-misses             #    2.18% of all branches
	    ^^^^^^^^^^^^^^^^^^^^

Those above?

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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