Messages in this thread | | | Date | Fri, 11 Jul 2014 22:15:07 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH tip/core/rcu 11/17] rcu: Bind grace-period kthreads to non-NO_HZ_FULL CPUs |
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On Fri, Jul 11, 2014 at 02:05:08PM -0500, Christoph Lameter wrote: > The use case is pretty straightforward because we are trying to keep as > much OS noise as possible off most processors. Processor 0 is the > sacrificial lamb that will be used for all OS processing and hopefully all > high latency operations will occur there. Processors 1-X have a tick but > we still try to keep latencies sane. And then there is X-Y where tick is > off.
So the problem is -- and this isn't too hard to create -- when we saturate/overload cpu0 with just the housekeeping. At that point it would be good if we could scale and use multiple housekeepers.
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