On Tue, 2014-04-08 at 21:43 +, Brown, Len wrote:
> Davidlohr,
>
> Thanks for the note.
>
> Ideally (on Linux in general, and on servers, in particular) we strive
> for the performance impact of power saving features to be small enough
> to be considered in "measurement noise".
>
> Your repor
On Tue, Apr 08, 2014 at 09:43:54PM +, Brown, Len wrote:
> #1: skip flush for C1
> #2: skip flush for C1 and C1E
One stray thought I had: IFF the erratum is due to the cache flushing of
the higher C states, these two patches should still be correct while
also (possibly) avoiding the performance
Davidlohr,
Thanks for the note.
Ideally (on Linux in general, and on servers, in particular) we strive
for the performance impact of power saving features to be small enough
to be considered in "measurement noise".
Your report for 160 core Westmere AIM numbers being hit at 10-25%
shows 15% measu
On Tue, Mar 18, 2014 at 07:14:04PM -0700, Jason Low wrote:
> On Tue, Mar 18, 2014 at 2:16 AM, Peter Zijlstra wrote:
> > On Mon, Mar 17, 2014 at 05:20:10PM -0700, Davidlohr Bueso wrote:
> >> On Thu, 2013-12-19 at 11:51 -0800, tip-bot for Len Brown wrote:
> >> > Commit-ID: 40e2d7f9b5dae048789c64672
On Tue, Mar 18, 2014 at 2:16 AM, Peter Zijlstra wrote:
> On Mon, Mar 17, 2014 at 05:20:10PM -0700, Davidlohr Bueso wrote:
>> On Thu, 2013-12-19 at 11:51 -0800, tip-bot for Len Brown wrote:
>> > Commit-ID: 40e2d7f9b5dae048789c64672bf3027fbb663ffa
>> > Gitweb:
>> > http://git.kernel.org/tip/40
On Mon, Mar 17, 2014 at 05:20:10PM -0700, Davidlohr Bueso wrote:
> On Thu, 2013-12-19 at 11:51 -0800, tip-bot for Len Brown wrote:
> > Commit-ID: 40e2d7f9b5dae048789c64672bf3027fbb663ffa
> > Gitweb:
> > http://git.kernel.org/tip/40e2d7f9b5dae048789c64672bf3027fbb663ffa
> > Author: Len Bro
On Thu, 2013-12-19 at 11:51 -0800, tip-bot for Len Brown wrote:
> Commit-ID: 40e2d7f9b5dae048789c64672bf3027fbb663ffa
> Gitweb: http://git.kernel.org/tip/40e2d7f9b5dae048789c64672bf3027fbb663ffa
> Author: Len Brown
> AuthorDate: Wed, 18 Dec 2013 16:44:57 -0500
> Committer: H. Peter Anvin
Commit-ID: 40e2d7f9b5dae048789c64672bf3027fbb663ffa
Gitweb: http://git.kernel.org/tip/40e2d7f9b5dae048789c64672bf3027fbb663ffa
Author: Len Brown
AuthorDate: Wed, 18 Dec 2013 16:44:57 -0500
Committer: H. Peter Anvin
CommitDate: Thu, 19 Dec 2013 11:47:39 -0800
x86 idle: Repair large-serv
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