Binding a thread (or specific process) to a designated CPU

Binding a thread (or specific process) to a designated CPU

[Brian D. McGrew]

Good morning,

Using FC3 or FC4 with the 2.6.9 or later kernel, we're looking for a way
to bind a thread (or an entire process) to a designated CPU.  We're
using dual processor systems as well as P4 with HT and Xeons so all of
our boxes either have two CPU's or 'appear' to have two.

I want to be able, in my C++ code to designate a specific thread to a
specific processor.  I've heard rumors that with the 2.6 kernel this is
now possible???

Thanks,

-brian
 
Brian D. McGrew { brian@visionpro.com || brian@doubledimension.com }
---
> Those of you who think you know it all,
  really annoy those of us who do!

Re: Binding a thread (or specific process) to a designated CPU

[Jesper Juhl]

On 8/22/05, Brian D. McGrew <brian@visionpro.com> wrote:
> Good morning,
> 
> Using FC3 or FC4 with the 2.6.9 or later kernel, we're looking for a way
> to bind a thread (or an entire process) to a designated CPU.  We're

       #include <sched.h>

       int sched_setaffinity(pid_t pid, unsigned int len, unsigned long *mask);
       int sched_getaffinity(pid_t pid, unsigned int len, unsigned long *mask);


-- 
Jesper Juhl <jesper.juhl@gmail.com>
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html

Re: Binding a thread (or specific process) to a designated CPU

[Tomasz Torcz]

[-- Attachment #1: Type: text/plain, Size: 398 bytes --]

On Mon, Aug 22, 2005 at 02:56:47PM -0700, Brian D. McGrew wrote:
> Using FC3 or FC4 with the 2.6.9 or later kernel, we're looking for a way
> to bind a thread (or an entire process) to a designated CPU. 

 man sched_setaffinity

-- 
Tomasz Torcz                        To co nierealne - tutaj jest normalne.
zdzichu@irc.-nie.spam-.pl          Ziomale na życie mają tu patenty specjalne.


[-- Attachment #2: Type: application/pgp-signature, Size: 229 bytes --]

Re: Binding a thread (or specific process) to a designated CPU

[Douglas McNaught]

"Brian D. McGrew" <brian@visionpro.com> writes:

> Good morning,
>
> Using FC3 or FC4 with the 2.6.9 or later kernel, we're looking for a way
> to bind a thread (or an entire process) to a designated CPU.  We're
> using dual processor systems as well as P4 with HT and Xeons so all of
> our boxes either have two CPU's or 'appear' to have two.
>
> I want to be able, in my C++ code to designate a specific thread to a
> specific processor.  I've heard rumors that with the 2.6 kernel this is
> now possible???

Look into sched_setaffinity() and friends.

-Doug