Force Processes where to run

[Amiel Tutolo]

Is there a way to force a process to execute on only one cpu? We have an L3000 that has 2 550mhz processors. I am being asked to try to pin a certain process to one cpu. I don't see a way to do this. Has anyone ever done this or seen this done? Thanks in advance for all your help.

[Pete Randall · Accepted solution]

There is a system call that will set processor affinity, though I can't remember the exact name of the call. You could search the forums and come up with it and possibly a little C program to make use of it. Search on "processor affinity".


Pete

[Steven E. Protter]

That kind of intervention is likely to disrupt the general operation of your server.

If this is an attempt to meet license requirements it won't help. Oracle for example says if the CPU is present, oracle must be licensed on it.

IF its a performance issue, PRM might be used to manage performance and give good priority to the processes that need priority.

It is usually much better to let the system decide which cpu the process runs on.

SEP

[Vijaya Kumar_3]

And one more thing is to use this product if you have already installed

http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=B3835DA

Anyway, i am checking a 'free' way of doing this as "pbind with solaris"


VJ

[A. Clay Stephenson]

The easist method is to purchase the PRM package. (Process Resource Management). If you know C then the mpctl system call will do the trick. Man 2 mpctl for details.

[Hazem Mahmoud_3]

I believe PRM can do this for you, although I have not used it. You can get more information at:
http://www.software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=B3835DATRY

-Hazem