On Tue, May 20, 2014 at 02:39:27PM -0700, Tim Chen wrote: > From: Tim Chen <[email protected]> > Subject: [PATCH v2] sched: Reduce the rate of needless idle load balancing > > > The current no_hz idle load balancer do load balancing for *all* idle cpus, > even though the time due to load balance for a particular > idle cpu could be still a while in the future. This introduces a much > higher load balancing rate than what is necessary. The patch > changes the behavior by only doing idle load balancing on > behalf of an idle cpu only when it is due for load balancing. > > On SGI's systems with over 3000 cores, the cpu responsible for idle balancing > got overwhelmed with idle balancing, and introduces a lot of OS noise > to workloads. This patch fixes the issue. > > Acked-by: Russ Anderson <[email protected]> > Reviewed-by: Rik van Riel <[email protected]> > Reviewed-by: Jason Low <[email protected]> > Signed-off-by: Tim Chen <[email protected]> > ---
Thanks!
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