Re: [PATCH v2] perf/x86/amd: Make HW_CACHE_REFERENCES and HW_CACHE_MISSES measure L2

From	Borislav Petkov <bp@alien8.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2] perf/x86/amd: Make HW_CACHE_REFERENCES and HW_CACHE_MISSES measure L2
Date	2016-08-25 06:40 +0200
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(dropping stable@ from CC)

On Wed, Aug 24, 2016 at 08:27:06PM +0200, Peter Zijlstra wrote:
> They're not meant to be comparable between machines. I wouldn't even
> compare the LLC numbers between two different Intel parts.
> 
> These events are meant to profile a workload on the machine you run them
> on. Big cache-miss/ref ratios indicate you loose performance because of
> the memory subsystem and or data structure layout.

Ah ok, then I've misunderstood Matt's justification in the commit message.

FWIW: Acked-by: Borislav Petkov <bp@suse.de>

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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[PATCH v2] perf/x86/amd: Make HW_CACHE_REFERENCES and HW_CACHE_MISSES measure L2 Matt Fleming <matt@codeblueprint.co.uk> - 2016-08-24 15:20 +0200
  Re: [PATCH v2] perf/x86/amd: Make HW_CACHE_REFERENCES and  HW_CACHE_MISSES measure L2 Borislav Petkov <bp@alien8.de> - 2016-08-24 17:00 +0200
    Re: [PATCH v2] perf/x86/amd: Make HW_CACHE_REFERENCES and  HW_CACHE_MISSES measure L2 Peter Zijlstra <peterz@infradead.org> - 2016-08-24 20:30 +0200
      Re: [PATCH v2] perf/x86/amd: Make HW_CACHE_REFERENCES and  HW_CACHE_MISSES measure L2 Borislav Petkov <bp@alien8.de> - 2016-08-25 06:40 +0200

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