From: Matt Fleming <matt@codeblueprint.co.uk>
To: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Yuyang Du <yuyang.du@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [rfc patch] sched/fair: Use instantaneous load for fork/exec balancing
Date: Tue, 12 Jul 2016 12:14:08 +0100 [thread overview]
Message-ID: <20160712111408.GT8415@codeblueprint.co.uk> (raw)
In-Reply-To: <57835FCC.70205@arm.com>
On Mon, 11 Jul, at 09:58:52AM, Dietmar Eggemann wrote:
> This difference in the initial se->avg.load_avg value [0 or 1024] has an
> influence in wake_affine() [weight = p->se.avg.load_avg;] for the wakeup
> handling of the hackbench tasks in the 'send/receive data' phase.
The way I was running hackbench made it very susceptible to changes in
fork behaviour, i.e. running it with a small number of loops.
> There are a couple of patches on tip/sched/core which might change the
> behaviour of this: fork path, no double attach_entity_load_avg for new
> task, no remove_entity_load_avg for new task, changes in effective_load ...
Indeed they do! Things are much improved when running the latest
tip/sched/core, thanks for the pointer.
next prev parent reply other threads:[~2016-07-12 11:14 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-14 7:58 [rfc patch] sched/fair: Use instantaneous load for fork/exec balancing Mike Galbraith
2016-06-14 14:14 ` Dietmar Eggemann
2016-06-14 16:40 ` Mike Galbraith
2016-06-15 15:32 ` Dietmar Eggemann
2016-06-15 16:03 ` Mike Galbraith
2016-06-15 19:03 ` Dietmar Eggemann
2016-06-16 3:33 ` Mike Galbraith
2016-06-16 9:01 ` Dietmar Eggemann
2016-07-04 15:04 ` Matt Fleming
2016-07-04 17:43 ` Mike Galbraith
2016-07-06 11:45 ` Matt Fleming
2016-07-06 12:21 ` Mike Galbraith
2016-07-11 8:58 ` Dietmar Eggemann
2016-07-12 11:14 ` Matt Fleming [this message]
2016-06-14 22:42 ` Yuyang Du
2016-06-15 7:01 ` Mike Galbraith
2016-06-16 11:46 ` [patch] sched/fair: Use instantaneous load in wakeup paths Mike Galbraith
2016-06-16 12:04 ` Mike Galbraith
2016-06-16 12:41 ` Mike Galbraith
2016-06-17 6:21 ` Mike Galbraith
2016-06-17 10:55 ` Dietmar Eggemann
2016-06-17 13:57 ` Mike Galbraith
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160712111408.GT8415@codeblueprint.co.uk \
--to=matt@codeblueprint.co.uk \
--cc=dietmar.eggemann@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mgorman@techsingularity.net \
--cc=peterz@infradead.org \
--cc=umgwanakikbuti@gmail.com \
--cc=yuyang.du@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.