topic Re: Push CPU in Operating System - HP-UX

Push CPU

Nobody's Hero — Mon, 16 Mar 2009 10:33:27 GMT

Hi All,

I have a new system, 16 cpu's.
Is there a simple scipt I can run that will push all the CPUS at the same time? When all 16 cpu's are running at the same time, are they really? or are they interleaving between or pausing waiting for I/O from time to time? I've always been not sure about this.
Is there a good test to run that will prove that all 16 are truly running at the same time and none are waiting?

I know gzip will grab an entire processor, can we do something like that?

Re: Push CPU

Pete Randall — Mon, 16 Mar 2009 10:42:14 GMT

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1194922
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1190255
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1029527

Maybe one of those will help.

Pete

Re: Push CPU

James R. Ferguson — Mon, 16 Mar 2009 10:44:32 GMT

Hi:

You could use this:

# perl -e 'fork; fork; fork; fork; 1 while {}' #...creates 16 processes...

Regards!

...JRF...

Re: Push CPU

Ganesan R — Mon, 16 Mar 2009 10:48:24 GMT

Hi,

Why do you want to push all 16 CPU's when there is no load at all?

If there is a load, obviously all the CPU's are going to be utilised.

If you want to assign specifc job's to specific processor, need to go for products like PRM(Processor resource manager)

Re: Push CPU

T G Manikandan — Mon, 16 Mar 2009 11:29:51 GMT

as pointed, you need to read about process resource manager.