From: Valentin Schneider <valentin.schneider@arm.com>
To: Vincent Guittot <vincent.guittot@linaro.org>,
mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
dietmar.eggemann@arm.com, rostedt@goodmis.org,
bsegall@google.com, mgorman@suse.de,
linux-kernel@vger.kernel.org
Cc: pauld@redhat.com, parth@linux.ibm.com
Subject: Re: [RFC 4/4] sched/fair: Take into runnable_avg to classify group
Date: Thu, 13 Feb 2020 18:37:19 +0000 [thread overview]
Message-ID: <e997556f-8adc-2165-2e76-ce9b0229c977@arm.com> (raw)
In-Reply-To: <94eae44f-7608-936d-4fde-dcf93cfa6b9b@arm.com>
On 2/13/20 6:32 PM, Valentin Schneider wrote:
>> @@ -7911,6 +7912,10 @@ group_has_capacity(unsigned int imbalance_pct, struct sg_lb_stats *sgs)
>> if (sgs->sum_nr_running < sgs->group_weight)
>> return true;
>>
>> + if ((sgs->group_capacity * imbalance_pct) <
>> + (sgs->group_runnable * 100))
>> + return false;
>> +
>
> I haven't stared long enough at patch 2, but I'll ask anyway - with this new
> condition, do we still need the next one (based on util)? AIUI
> group_runnable is >= group_util, so if group_runnable is within the allowed
> margin then group_util has to be as well.
>
Hmph, actually util_est breaks the runnable >= util assumption I think...
>> if ((sgs->group_capacity * 100) >
>> (sgs->group_util * imbalance_pct))
>> return true;
next prev parent reply other threads:[~2020-02-13 18:37 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 17:46 [PATCH 0/4] remove runnable_load_avg and improve group_classify Vincent Guittot
2020-02-11 17:46 ` [PATCH 1/4] sched/fair: reorder enqueue/dequeue_task_fair path Vincent Guittot
2020-02-12 13:20 ` Mel Gorman
2020-02-12 14:47 ` Vincent Guittot
2020-02-12 16:11 ` Mel Gorman
2020-02-11 17:46 ` [RFC 2/4] sched/numa: replace runnable_load_avg by load_avg Vincent Guittot
2020-02-12 13:37 ` Mel Gorman
2020-02-12 15:03 ` Vincent Guittot
2020-02-12 16:04 ` Mel Gorman
2020-02-12 19:49 ` Mel Gorman
2020-02-12 21:29 ` Mel Gorman
2020-02-13 8:05 ` Vincent Guittot
2020-02-13 9:24 ` Mel Gorman
[not found] ` <20200213131658.9600-1-hdanton@sina.com>
2020-02-13 13:46 ` Mel Gorman
2020-02-13 15:00 ` Phil Auld
2020-02-13 15:14 ` Mel Gorman
2020-02-13 16:11 ` Vincent Guittot
2020-02-13 16:34 ` Mel Gorman
2020-02-13 16:38 ` Vincent Guittot
2020-02-13 17:02 ` Mel Gorman
2020-02-13 17:15 ` Vincent Guittot
2020-02-11 17:46 ` [RFC 3/4] sched/fair: replace runnable load average by runnable average Vincent Guittot
2020-02-12 14:30 ` Mel Gorman
2020-02-14 7:42 ` Vincent Guittot
2020-02-13 17:36 ` Peter Zijlstra
2020-02-14 7:43 ` Vincent Guittot
2020-02-11 17:46 ` [RFC 4/4] sched/fair: Take into runnable_avg to classify group Vincent Guittot
2020-02-13 18:32 ` Valentin Schneider
2020-02-13 18:37 ` Valentin Schneider [this message]
2020-02-14 7:48 ` Vincent Guittot
2020-02-11 21:04 ` [PATCH 0/4] remove runnable_load_avg and improve group_classify Mel Gorman
2020-02-12 8:16 ` Vincent Guittot
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