From: Peter Zijlstra <peterz@infradead.org>
To: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: mingo@redhat.com, valentin.schneider@arm.com,
dietmar.eggemann@arm.com, vincent.guittot@linaro.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/7] sched/fair: Avoid unnecessary balancing of asymmetric capacity groups
Date: Mon, 19 Feb 2018 15:50:12 +0100 [thread overview]
Message-ID: <20180219145012.GH25181@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1518711654-23503-5-git-send-email-morten.rasmussen@arm.com>
On Thu, Feb 15, 2018 at 04:20:51PM +0000, Morten Rasmussen wrote:
> On systems with asymmetric cpu capacities, a skewed load distribution
> might yield better throughput than balancing load per group capacity.
> For example, preferring high capacity cpus for compute intensive tasks
> leaving low capacity cpus idle rather than balancing the number of idle
> cpus across different cpu types. Instead, let load-balance back off if
> the busiest group isn't really overloaded.
I'm sorry. I just can't seem to make sense of that today. What?
next prev parent reply other threads:[~2018-02-20 13:02 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-15 16:20 [PATCH 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems Morten Rasmussen
2018-02-15 16:20 ` [PATCH 1/7] sched: Add static_key for asymmetric cpu capacity optimizations Morten Rasmussen
2018-02-16 13:47 ` Peter Zijlstra
2018-02-16 15:41 ` Morten Rasmussen
2018-02-16 16:51 ` Peter Zijlstra
2018-02-19 11:49 ` Morten Rasmussen
2018-02-16 17:39 ` Quentin Perret
2018-02-16 17:43 ` Peter Zijlstra
2018-02-15 16:20 ` [PATCH 2/7] sched/fair: Add group_misfit_task load-balance type Morten Rasmussen
2018-02-19 13:56 ` Peter Zijlstra
2018-02-19 13:58 ` Peter Zijlstra
2018-02-20 16:01 ` Morten Rasmussen
2018-02-15 16:20 ` [PATCH 3/7] sched/fair: Consider misfit tasks when load-balancing Morten Rasmussen
2018-02-15 16:20 ` [PATCH 4/7] sched/fair: Avoid unnecessary balancing of asymmetric capacity groups Morten Rasmussen
2018-02-19 14:50 ` Peter Zijlstra [this message]
2018-02-19 14:53 ` Peter Zijlstra
2018-02-20 16:22 ` Morten Rasmussen
2018-02-19 15:10 ` Peter Zijlstra
2018-02-20 16:33 ` Morten Rasmussen
2018-02-20 18:26 ` Peter Zijlstra
2018-02-23 16:38 ` Morten Rasmussen
2018-02-23 16:47 ` Peter Zijlstra
2018-02-26 15:06 ` Morten Rasmussen
2018-02-15 16:20 ` [PATCH 5/7] sched/fair: Kick nohz balance if rq->misfit_task Morten Rasmussen
2018-02-15 16:20 ` [PATCH 6/7] sched: Rename root_domain->overload to should_idle_balance Morten Rasmussen
2018-02-16 9:14 ` Juri Lelli
2018-02-16 9:49 ` Peter Zijlstra
2018-02-16 11:59 ` Valentin Schneider
2018-02-15 16:20 ` [PATCH 7/7] sched/fair: Set sd->should_idle_balance when misfit Morten Rasmussen
2018-02-28 7:46 ` [PATCH 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems Gaku Inami
2018-03-01 11:59 ` Valentin Schneider
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=20180219145012.GH25181@hirez.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=dietmar.eggemann@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=morten.rasmussen@arm.com \
--cc=valentin.schneider@arm.com \
--cc=vincent.guittot@linaro.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox