topic Re: cpu-switching on multi-cpu host in Operating System - Linux

cpu-switching on multi-cpu host

Timo J — Mon, 12 May 2003 08:34:06 GMT

We have four service processes running on four-cpu host. 3 of these 4 are running on same cpu all the time. Even if the processor load increases near 100% the processes stay on that same cpu while all the other cpus are in practice idling. How can we balance this load to all processors?

Re: cpu-switching on multi-cpu host

Jerome Henry — Mon, 12 May 2003 10:46:27 GMT

It may have several reasons, most common is that
you run a too old version of kernel,
kernel is not set for smp
your CPU is not SMPable.
Have a read at this :
http://ouray.cudenver.edu/~etumenba/smp-howto/SMP-HOWTO.html#toc4
compare this to your kernel and CPU, you'll get the answer.
Post your config here, we'll help you tune.
RGDS
J

Re: cpu-switching on multi-cpu host

Ralf Puchner — Mon, 12 May 2003 11:14:52 GMT

Try the "runon" command so run the applications among different CPU's.

Re: cpu-switching on multi-cpu host

Timo J — Mon, 12 May 2003 16:10:02 GMT

Sorry for confusion, but this problem was hp-ux related. I posted it to this group by accident.