On 23/05/05, Marco Calviani <[EMAIL PROTECTED]> wrote: > Hi, > i have one general question regarding the use of a dual Opteron CPU > using a smp kernel. I'm currently running a cpu intensive program that > use for some hours 100% of the cpu time. But having a look with top at > the processes it seems that only one CPU is doing the work at 100%: the > other one seems idle for most of the time. > Here i'm posting the normal behaviour: > > CPU states: cpu user nice system irq softirq iowait idle > total 99,0% 0,0% 1,4% 0,0% 0,0% 0,0% 99,4% > cpu00 0,0% 0,0% 0,4% 0,0% 0,0% 0,0% 99,5% > cpu01 99,0% 0,0% 0,9% 0,0% 0,0% 0,0% 0,0% > > Is this behaviour right for a dual cpu machine, or there is something > not going right?
If the program you're running is not SMP enabled then this is the right behaviour, the running program needs to be specially written to take advantage of a multiprocessor setup. See the SMP Howto for more details: http://www.tldp.org/HOWTO/SMP-HOWTO.html Cheers Adam
