Messages in this thread | | | Date | Fri, 9 May 2014 11:53:24 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 2/4] sched,numa: weigh nearby nodes for task placement on complex NUMA topologies |
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On Thu, May 08, 2014 at 01:23:29PM -0400, riel@redhat.com wrote: > + /* > + * For nodes with distances in-between LOCAL_DISTANCE > + * and max_distance, we count the faults on those nodes > + * in proportion to their distance, using this formula: > + * > + * max_distance - node_distance > + * ----------------------------- > + * max_distance - LOCAL_DISTANCE > + */ > + if (task) > + faults = task_faults(p, node); > + else > + faults = group_faults(p, node); > + > + score += 1000 * faults * > + (max_distance - distance) / > + (max_distance - LOCAL_DISTANCE);
OK that makes sense, except I would suggest you use a power-of-two scale factor :-) [unhandled content-type:application/pgp-signature] | |