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Date: Wed, 1 Nov 2017 11:36:25 -0500 From: Atish Patra <atish.patra@...cle.com> To: Mike Galbraith <efault@....de>, Peter Zijlstra <peterz@...radead.org> Cc: linux-kernel@...r.kernel.org, joelaf@...gle.com, brendan.jackman@....com, jbacik@...com, mingo@...hat.com Subject: Re: [PATCH RFC 1/2] sched: Minimize the idle cpu selection race window. On 11/01/2017 02:18 AM, Mike Galbraith wrote: > On Wed, 2017-11-01 at 07:54 +0100, Mike Galbraith wrote: >> On Wed, 2017-11-01 at 01:08 -0500, Atish Patra wrote: >> >>> Do you have the schbench configuration somewhere that I can test? I >>> tried various configurations but did not >>> see any improvement or regression. >> No, as noted, I didn't save anything. I watched and fiddled with >> several configurations on various sized boxen, doing this/that on top >> of the reservation thing to try to improve the "it's 100% about perfect >> spread" schbench, but didn't like the pricetag, so tossed the lot over >> my shoulder and walked away. :) > BTW, the biggest trouble with schbench at that time was not so much > about wakeup time stacking (though it was visible), it was using load > averages instead of instantaneous state, and sawtoothing therein. Ahh I see. Any other benchmark suggestion that may benefit from this fix ? Regards, Atish > -Mike
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