On 2013-12-16 09:28, Ingo Molnar wrote:
>
> * John wrote:
>
>> This patch has been tested on and known to work with kernel versions
>> from 3.2 up to the latest git version (pulled on 12/14/2013).
>>
>> This patch will expand the number of microarchitectures to include
>> new processors includ
* John wrote:
> This patch has been tested on and known to work with kernel versions
> from 3.2 up to the latest git version (pulled on 12/14/2013).
>
> This patch will expand the number of microarchitectures to include
> new processors including: AMD K10-family, AMD Family 10h
> (Barcelona),
Am Sonntag, 15. Dezember 2013, 04:42:50 schrieb John:
> - Original Message -
>
> > From: Richard Weinberger <>
> >
> > A *very* small speedup.
> >
> > And I really doubt your numbers.
> > Why are you using ANOVA? You're comparing *two* groups not more than two.
> > I had a quick look at
On Sun, Dec 15, 2013 at 04:42:50AM -0800, John wrote:
> I am using ANOVA to establish that the generic group differs from the
> optimized group.
You probably should run a couple other benchmarks, in addition, for
greater confidence that this optimization actually brings any palpable
improvement an
- Original Message -
> From: Richard Weinberger <>
>
> A *very* small speedup.
>
> And I really doubt your numbers.
> Why are you using ANOVA? You're comparing *two* groups not more than two.
> I had a quick look at your raw numbers, they don't seem to be normally
> distributed at all.
On Sun, Dec 15, 2013 at 1:00 PM, John wrote:
> - Original Message -
>
>> From: H. Peter Anvin
>> Sent: Saturday, December 14, 2013 6:41 PM
>> Subject: Re: Fw: [PATCH] expand micro-optimizations in kernel to newer model
>> CPUs
>
>>
>> Ple
> From: Austin S Hemmelgarn <>
> This really depends on how you define 'big'. Even a 1% performance
> increase is significant for a realtime system, and for someone with a
> cluster of systems, getting even a small improvement in performance on
> all of the systems could mean a huge increase in ef
- Original Message -
> From: H. Peter Anvin
> Sent: Saturday, December 14, 2013 6:41 PM
> Subject: Re: Fw: [PATCH] expand micro-optimizations in kernel to newer model
> CPUs
>
> Please submit in the email form requested by the
> Documentation/SubmittingPatches em
On 2013-12-09 22:51, David Heidelberger wrote:
> Hello,
>
> this patch is used in Gentoo geek-sources and mptcp-sources (and
> probably in lot other kernel sources sets). So, there was lot testing.
>
> It's not _big_ performance difference, but -mtune=native is nice to have.
> It could be great,
Hello,
this patch is used in Gentoo geek-sources and mptcp-sources (and
probably in lot other kernel sources sets). So, there was lot testing.
It's not _big_ performance difference, but -mtune=native is nice to
have.
It could be great, if this kernel option could be fully utilized without
ne
I have been maintaining the attached patch since kernel v3.9.[1] I submit for
review the most recent incarnation which works with the v3.12 tree. As you can
see by the ANOVA plots referenced in the comments, these micro optimizations
are value-added statistically based on a compilation endpoin
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