From: Peter Zijlstra <peterz@infradead.org>
To: Rik van Riel <riel@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@vger.kernel.org,
mingo@redhat.com, chegu_vinod@hp.com, mgorman@suse.de,
Rik van Riel <riel@surriel.com>
Subject: Re: [PATCH 6/6] numa,sched: normalize faults_from stats and weigh by CPU use
Date: Fri, 17 Jan 2014 16:04:09 +0100 [thread overview]
Message-ID: <20140117150409.GJ11314@laptop.programming.kicks-ass.net> (raw)
In-Reply-To: <52D94380.5040901@redhat.com>
On Fri, Jan 17, 2014 at 09:51:44AM -0500, Rik van Riel wrote:
> On 01/17/2014 04:54 AM, Peter Zijlstra wrote:
> > On Fri, Jan 17, 2014 at 01:17:36AM -0500, riel@redhat.com 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.
>
> Thanks for the review, I have updated the comment
> accordingly.
>
> Does anybody else have comments on this series, or should
> I start begging for Acked-by: and Reviewed-by: lines? :)
I still need to get me head around part of the previous patches, and I
suppose Mel might have a look, give it a few days ;-)
next prev parent reply other threads:[~2014-01-17 15:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-17 6:17 [PATCH 0/6] pseudo-interleaving for automatic NUMA balancing riel
2014-01-17 6:17 ` [PATCH 1/6] numa,sched,mm: remove p->numa_migrate_deferred riel
2014-01-17 6:17 ` [PATCH 2/6] numa,sched: track from which nodes NUMA faults are triggered riel
2014-01-17 6:17 ` [PATCH 3/6] numa,sched: build per numa_group active node mask from faults_from statistics riel
2014-01-17 6:17 ` [PATCH 4/6] numa,sched: tracepoints for NUMA balancing active nodemask changes riel
2014-01-17 6:17 ` [PATCH 5/6] numa,sched,mm: use active_nodes nodemask to limit numa migrations riel
2014-01-17 6:17 ` [PATCH 6/6] numa,sched: normalize faults_from stats and weigh by CPU use riel
2014-01-17 9:54 ` Peter Zijlstra
2014-01-17 14:51 ` Rik van Riel
2014-01-17 15:04 ` Peter Zijlstra [this message]
2014-01-17 18:47 ` Rik van Riel
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