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SubjectRe: High priority tasks break SMP balancer?
On Mon, Nov 19, 2007 at 11:22:06PM +0100, Dmitry Adamushko wrote:
> You seem to have a configuration with domains which don't have
> SD_BALANCE_NEWIDLE on (CONFIG_NUMA?) as there are no events (all
> zeros above) for CPU_NEWLY_IDLE.
>
> this one is being triggered whenever a cpu becomes idle (schedule()
> --> idle_balance() --> load_balance_newidle()).
>
> (this flag is a bit #1 == 2)
>
> cat /proc/sys/kernel/sched_domain/cpu0/domain0/flags

Hmm. I don't have this file on my system:

root@micah-64:/proc/sys/kernel/sched_domain/cpu0/domain0# ls
busy_factor busy_idx forkexec_idx idle_idx imbalance_pct max_interval min_interval newidle_idx wake_idx
root@micah-64:/proc/sys/kernel/sched_domain/cpu0/domain0# uname -a
Linux micah-64 2.6.23.1 #1 SMP Fri Nov 2 12:25:47 PDT 2007 x86_64 GNU/Linux

Is there a config option I'm missing?

Thanks,
--Micah

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