From: Peter Zijlstra <peterz@infradead.org>
To: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, Mike Galbraith <efault@gmx.de>,
Paul Turner <pjt@google.com>, Alex Shi <alex.shi@intel.com>,
Preeti U Murthy <preeti@linux.vnet.ibm.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Namhyung Kim <namhyung@kernel.org>, Lei Wen <leiwen@marvell.com>,
Rik van Riel <riel@surriel.com>
Subject: Re: [PATCH 04/10] sched, fair: Shrink sg_lb_stats and play memset games
Date: Wed, 21 Aug 2013 10:38:02 +0200 [thread overview]
Message-ID: <20130821083802.GO3258@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20130821022002.GC6142@lge.com>
On Wed, Aug 21, 2013 at 11:20:02AM +0900, Joonsoo Kim wrote:
> > With below change, we can simply do 'offsetof(struct sd_lb_stats, busiest_stat)'.
> >
> > @@ -4546,7 +4546,7 @@ static bool update_sd_pick_busiest(struct lb_env *env,
> > struct sched_group *sg,
> > struct sg_lb_stats *sgs)
> > {
> > - if (sgs->avg_load <= sds->busiest_stat.avg_load)
> > + if (!sds->busiest && sgs->avg_load <= sds->busiest_stat.avg_load)
> > return false;
> >
> > if (sgs->sum_nr_running > sgs->group_capacity)
> >
>
> Sorry, instead of !sds->busiest, it should be sds->busiest. :)
Of course ;-) However I'm not sure which I prefer.. adding this extra
condition or having the initialization extra tricky. I'll sit on it a
little longer.
next prev parent reply other threads:[~2013-08-21 8:38 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-19 16:00 [PATCH 00/10] Various load-balance cleanups/optimizations -v2 Peter Zijlstra
2013-08-19 16:00 ` [PATCH 01/10] sched: Remove one division operation in find_busiest_queue() Peter Zijlstra
2013-08-22 8:58 ` Paul Turner
2013-08-22 10:25 ` Peter Zijlstra
2013-08-19 16:01 ` [PATCH 02/10] sched: Factor out code to should_we_balance() Peter Zijlstra
2013-08-22 9:58 ` Paul Turner
2013-08-22 10:42 ` Peter Zijlstra
2013-08-23 4:51 ` Joonsoo Kim
2013-08-23 11:37 ` Paul Turner
2013-08-19 16:01 ` [PATCH 03/10] sched: Clean-up struct sd_lb_stat Peter Zijlstra
2013-08-24 10:09 ` Paul Turner
2013-08-26 11:38 ` Peter Zijlstra
2013-08-26 2:56 ` Lei Wen
2013-08-26 4:36 ` Paul Turner
2013-08-26 8:42 ` Lei Wen
2013-08-19 16:01 ` [PATCH 04/10] sched, fair: Shrink sg_lb_stats and play memset games Peter Zijlstra
2013-08-21 2:08 ` Joonsoo Kim
2013-08-21 2:20 ` Joonsoo Kim
2013-08-21 8:38 ` Peter Zijlstra [this message]
2013-08-21 8:35 ` Peter Zijlstra
2013-08-24 10:15 ` Paul Turner
2013-08-26 11:46 ` Peter Zijlstra
2013-08-19 16:01 ` [PATCH 05/10] sched, fair: Remove duplicate load_per_task computations Peter Zijlstra
2013-08-19 16:01 ` [PATCH 06/10] sched, fair: Make group power more consitent Peter Zijlstra
2013-08-23 3:40 ` Preeti U Murthy
2013-08-19 16:01 ` [PATCH 07/10] sched, fair: Optimize find_busiest_queue() Peter Zijlstra
2013-08-23 8:11 ` Preeti U Murthy
2013-08-23 10:03 ` Peter Zijlstra
2013-08-23 10:54 ` Preeti U Murthy
2013-08-24 10:33 ` Paul Turner
2013-08-26 12:07 ` Peter Zijlstra
2013-08-27 9:13 ` Paul Turner
2013-08-19 16:01 ` [PATCH 08/10] sched, fair: Rework and comment the group_imb code Peter Zijlstra
2013-08-19 16:01 ` [PATCH 09/10] sched, fair: Fix the sd_parent_degenerate() code Peter Zijlstra
2013-08-24 10:45 ` Paul Turner
2013-08-26 12:09 ` Peter Zijlstra
2013-08-26 21:49 ` Rik van Riel
2013-08-27 9:05 ` Paul Turner
2013-08-19 16:01 ` [RFC][PATCH 10/10] sched, fair: Rewrite group_imb trigger Peter Zijlstra
2013-08-21 2:09 ` [PATCH 00/10] Various load-balance cleanups/optimizations -v2 Joonsoo Kim
2013-08-28 8:55 ` [RFC][PATCH 11/10] sched, fair: Reduce local_group logic Peter Zijlstra
2013-08-28 8:57 ` Peter Zijlstra
2013-08-28 9:16 ` Peter Zijlstra
2013-08-28 11:14 ` [PATCH 12/10] sched, fair: Fix group power_orig computation Peter Zijlstra
2013-08-28 11:15 ` [PATCH 13/10] sched, fair: Rework and comment the group_capacity code Peter Zijlstra
2013-08-28 11:16 ` [RFC][PATCH 14/10] sched, fair: Fix the group_capacity computation Peter Zijlstra
2013-09-04 7:44 ` Vincent Guittot
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