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Re: Hang with fair cgroup scheduler (reproducer is attached.) [message #25105 is a reply to message #25099] Fri, 14 December 2007 14:15 Go to previous messageGo to previous message
Dhaval Giani is currently offline  Dhaval Giani
Messages: 37
Registered: June 2007
Member
On Fri, Dec 14, 2007 at 01:47:13PM +0100, Dmitry Adamushko wrote:
> On 14/12/2007, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > Here is much easier test.
> > (I'm sorry I'll be absent tomorrow.)
> >
> > the number of cpus is 8. ia64/NUMA.
> >
> > The hang occurs when the number of tasks is not smaller than available cpus.
> > Can be a hint ?
> >
> > [ ... ]
> >
> > [root@rhel51GA testpro]#./batech-test.sh
> > no hang.
> >
> > [root@rhel51GA testpro]#taskset 0f ./batech-test.sh
> > no hang
> >
> > [root@rhel51GA testpro]#taskset 03 ./batech-test.sh
> > hang.
> 
> have you tried :
> 
> [root@rhel51GA testpro]#taskset 01 ./batech-test.sh
> 
> hang?
> 
> just to be sure SMP does matter here (most likely yes, I guess).
> 

NUMA? I am not able to reproduce it here locally on an x86 8 CPU box.


-- 
regards,
Dhaval
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