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Re: [RFC PATCH 2/3] sched: add yield_to function

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From: Rik van Riel
Subject: Re: [RFC PATCH 2/3] sched: add yield_to function
Date: Sunday, January 2, 2011 - 10:19 am

On 01/02/2011 06:43 AM, Hillf Danton wrote:


I threw out my patch before Christmas, replacing it with
Mike Galbraith's work.

Today I finally discovered why I had not been getting
very useful results testing the PLE code on the test
system.

On this particular CPU model (Intel(R) Xeon(R) CPU X5670),
the value of ple_gap needs to be at least 48 !

A ple_gap value of 41 is simply too low to trigger reliably
with Avi's kvm-unit-tests PLE test and also only triggers
a few times a second at most (not too useful) with the other
tests I had been running...

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Messages in current thread:
Re: [RFC PATCH 2/3] sched: add yield_to function, Hillf Danton, (Sun Jan 2, 4:43 am)
Re: [RFC PATCH 2/3] sched: add yield_to function, Rik van Riel, (Sun Jan 2, 10:19 am)
Re: [RFC PATCH 2/3] sched: add yield_to function, Hillf Danton, (Sun Jan 2, 9:18 pm)
Re: [RFC PATCH 2/3] sched: add yield_to function, Rik van Riel, (Sun Jan 2, 10:04 pm)
Re: [RFC PATCH 2/3] sched: add yield_to function, Hillf Danton, (Tue Jan 4, 5:44 am)