RE: Pin a CPU in Solaris

From: Mohan, Ross <MohanR_at_STARS-SMI.com>
Date: Tue, 12 Jun 2001 13:02:45 -0700
Message-ID: <F001.003265BD.20010612130033@fatcity.com>

Binding processes to CPUs is not at normal, even in high load situations.

System scheduler ticks move even busy procs off CPUs, to go back through the run skedder.

Yes, of course, the newer/better run scheduler are aware of register and CPU cache flush issues, but there is no guarantee a processor under the default scheduler will own a CPU. Not at all.

Of course, I could be misunderstanding what you're trying to test. If you're trying to run a single CPU benchmark, then YES, you'd want to have ONE and ONLY ONE processor to run it...no context switches, no processor swaps...just b*lls to the wall performance.

But that's not real life, and should not be proferred as a simulation of it.

hth

Hannibal

-----Original Message-----
Sent: Tuesday, June 12, 2001 1:41 PM
To: Multiple recipients of list ORACLE-L

Does anyone know how to pin a Solaris CPU at a high utilization? I am doing some testing and want to evaluate a system under a high CPU load. Thanks.

Erik

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Author: Erik Williams
  INET: ewilliams_at_brownco.com

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Author: Mohan, Ross
  INET: MohanR_at_STARS-SMI.com

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To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Tue Jun 12 2001 - 15:02:45 CDT