Re: [PATCH 6/6] numa,sched: normalize faults_from stats and weigh byCPU use

From: Peter Zijlstra
Date: Fri Jan 17 2014 - 04:55:15 EST


On Fri, Jan 17, 2014 at 01:17:36AM -0500, riel@xxxxxxxxxx wrote:
> + /*
> + * Normalize the faults_from, so all tasks in a group
> + * count according to CPU use, instead of by the raw
> + * number of faults. This prevents the situation where
> + * the garbage collector totally dominates the stats,
> + * and the access patterns of the worker threads are
> + * ignored.
> + */

Instead of focusing on the one example (GC) here, I would suggest
saying something along the lines of: Tasks with little runtime have
little over-all impact on throughput and thus their faults are less
important.
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