From: Mark Brown <broonie-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
To: Linus Walleij <linus.walleij-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Viresh Kumar <viresh.kumar-qxv4g6HH51o@public.gmane.org>,
Chris Blair <chris.blair-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>,
Linus Walleij
<linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH] spi/pl022: Add high priority message pump support
Date: Wed, 25 Jan 2012 14:02:15 +0000 [thread overview]
Message-ID: <20120125140215.GB2054@sirena.org.uk> (raw)
In-Reply-To: <1327439672-638-1-git-send-email-linus.walleij-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
On Tue, Jan 24, 2012 at 10:14:32PM +0100, Linus Walleij wrote:
> From: Chris Blair <chris.blair-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
>
> This switches the PL022 worker to a kthread in order to get
> hold of a mechanism to control the message pump priority. On
> low-latency systems elevating the message kthread to realtime
> priority give a real sleek response curve. This has been
> confirmed by measurements. Realtime priority elevation for
> a certain PL022 port can be requested from platform data.
It really feels like we should be pulling this into the core - lots of
drivers use a workqueue to drive data through the system and they're all
going to have exactly the same issue.
------------------------------------------------------------------------------
Keep Your Developer Skills Current with LearnDevNow!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-d2d
next prev parent reply other threads:[~2012-01-25 14:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-24 21:14 [PATCH] spi/pl022: Add high priority message pump support Linus Walleij
[not found] ` <1327439672-638-1-git-send-email-linus.walleij-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
2012-01-25 3:36 ` Viresh Kumar
2012-01-25 14:02 ` Mark Brown [this message]
[not found] ` <20120125140215.GB2054-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2012-01-26 14:48 ` Linus Walleij
[not found] ` <CACRpkdauRqVzUbr59P75Zyd-AFc8Y7fBJ=AWoSMQPYxXUJjBMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-01-26 15:50 ` Mark Brown
2012-01-27 15:43 ` Grant Likely
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=20120125140215.GB2054@sirena.org.uk \
--to=broonie-gfdadszt00ze9xe1eozjha@public.gmane.org \
--cc=chris.blair-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org \
--cc=linus.walleij-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org \
--cc=linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
--cc=viresh.kumar-qxv4g6HH51o@public.gmane.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;
as well as URLs for NNTP newsgroup(s).