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Old 04-06-2009, 09:29 AM   #1
lennyk
LQ Newbie
 
Registered: Jan 2009
Posts: 18

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Using taskset to set process affinity on multi-core/hyperthreading


Hi,

I have an Intel i7 machine (4 cores, 2 hyperthreads per core).
I would like to explicitly use 3 cores for a certain process - and run all the other processes (including system services and kernel processes) on the remaining core.
I've tried to "fish out" all the current pids (using ps -e combined in a perl script) and then run:
taskset -p 3 <pid>
(this sets the affinity mask to all the process so that'll see only core 0 - with its 2 hyperthreads)

This hangs the machine causing a kernel panic.

Any ideas why?
Is there an alternative way to carry out this procedure?

Thanks.
 
  


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