All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Linux PM list <linux-pm@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Sudeep Holla <sudeep.holla@arm.com>
Subject: [PATCH 0/2] cpuidle optimizations (on top of linux-next)
Date: Sat, 16 Jan 2016 00:53:41 +0100	[thread overview]
Message-ID: <1621492.NI2xz9vt7M@vostro.rjw.lan> (raw)

Hi,

When I was looking at the cpuidle code after the Sudeeps's problem report,
it occured to me that we had some pointless overhead there, so two
changes to reduce it follow.

[1/2] Make the fallback to to default_idle_call() in call_cpuidle()
      unnecessary and drop it.
[2/2] Make menu_select() avoid checking states that don't need to
      (or even shouldn't) be checked when making the selection.

Thanks,
Rafael

             reply	other threads:[~2016-01-15 23:56 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-15 23:53 Rafael J. Wysocki [this message]
2016-01-15 23:54 ` [PATCH 1/2] sched / idle: Drop default_idle_call() fallback from call_cpuidle() Rafael J. Wysocki
2016-01-18 14:36   ` Peter Zijlstra
2016-01-15 23:56 ` [PATCH 2/2] cpuidle: menu: Avoid pointless checks in menu_select() Rafael J. Wysocki
2016-01-18 22:51   ` [Resend][PATCH " Rafael J. Wysocki
2016-01-18 13:45 ` [PATCH 0/2] cpuidle optimizations (on top of linux-next) Sudeep Holla
2016-01-19  7:28   ` Ingo Molnar
2016-01-19 13:14     ` Rafael J. Wysocki
2016-01-19 13:28       ` Ingo Molnar
2016-01-19 13:50         ` Rafael J. Wysocki

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=1621492.NI2xz9vt7M@vostro.rjw.lan \
    --to=rjw@rjwysocki.net \
    --cc=daniel.lezcano@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=sudeep.holla@arm.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.