From: Dan Noe <dpn@isomerica.net>
To: Brian McGrew <brian@visionpro.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Two questions about scheduling and threading.
Date: Thu, 08 May 2008 11:47:30 -0400 [thread overview]
Message-ID: <48232092.9090209@isomerica.net> (raw)
In-Reply-To: <C448672F.1E24B%brian@visionpro.com>
On 5/8/2008 11:15, Brian McGrew wrote:
> Also, I know that we're supposed to sit back and let the scheduler do all
> the work for us; but, in the 2.6.16.16 kernel, is there a way to assign a
> specific thread and/or process to a designated processor??? I really need
> to be able to do this because even with the preemptive scheduling, I'm still
> real-time and it's not quite real-time enough!
There are some functions to set CPU affinity from user space:
sched_setaffinity()
sched_getaffinity()
And a user space program:
taskset
All have decent man pages. They'll allow you to pin a process to a
particular CPU, or set the normal behavior, which is to try and keep a
process on the same CPU as long as possible. There are some other
utilities mentioned in the related section of the manpages - they allow
you to tweak scheduler behavior.
Hope that helps.
Cheers,
Dan
--
/--------------- - - - - - -
| Dan Noe
| http://isomerica.net/~dpn/
next prev parent reply other threads:[~2008-05-08 15:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <C4485A81.1E1EF%brian@visionpro.com>
2008-05-08 15:15 ` Two questions about scheduling and threading Brian McGrew
2008-05-08 15:47 ` Dan Noe [this message]
2008-05-08 19:44 ` David Schwartz
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=48232092.9090209@isomerica.net \
--to=dpn@isomerica.net \
--cc=brian@visionpro.com \
--cc=linux-kernel@vger.kernel.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 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.