Re: Performance problems for root
John Rohlf (jrohlf++at++tubes)
Fri, 22 Sep 95 10:51:34 PDT
>
> Hello!
>
> We have a remarkable problem with a multiprocess-Performer
> application running with root privileges (setuid or started
> by root) on a 12 CPU, 3 pipes Onyx under Performer 1.2 and
> IRIX 5.3:
>
> When started in privileged mode, the obtained performance
> is much lower than when being run by a non-privileged user
> (intermittent frame delay, 10-30 msec).
>
> Any suggestions?
>
> Best regards,
> Aris ChristidisAITEC GmbH & CO Informationstechnologie KG
> Dr. Aris Christidis
> Alter Hellweg 50
> D-44379 Dortmund
> Tel.: +49 231 9646545
> Fax.: +49 231 9646598
> EMail: ac++at++aitec.de
This kind of thing may be a result of starvation and/or deadlock.
Are you?
1. isolating processors,
2. assigning more than one process to a CPU,
3. using non-degrading priorities
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on Mon Aug 10 1998 - 17:51:54 PDT