atom feed4 messages in org.freebsd.freebsd-smpRe: Affinity
FromSent OnAttachments
Joachim StrombergsonNov 4, 1999 11:42 pm 
David ScheidtNov 5, 1999 12:46 am 
Peter WemmNov 5, 1999 4:06 am 
Charles RandallNov 5, 1999 7:50 am 
Subject:Re: Affinity
From:David Scheidt (dsch@enteract.com)
Date:Nov 5, 1999 12:46:45 am
List:org.freebsd.freebsd-smp

On Fri, 5 Nov 1999, Joachim Strombergson wrote:

Hi!

I've missed the message boats a few times so... Could anyone explain the affinity thing again. If I understood it correctly, it's used to lock a process to a certain CPU.

More or less right. Processor affinity needn't be implmented such that a process only runs on a certain CPU, it can also just make it more likely that it runs on that CPU. How much of a win it is depends on a number of factors, like what the job is, how big its primary data and code sets are, and the cache coherency model of the machine is.

David Scheidt

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