linux-kernel - Re: How do I raise the priority of one thread in a multi-threaded process?

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Message-ID: <Pine.LNX.4.44L0.0808211651140.17334-100000@iolanthe.rowland.org>
Date:	Thu, 21 Aug 2008 17:04:28 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Michal Hocko <mhocko@...e.cz>
cc:	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: How do I raise the priority of one thread in a multi-threaded
 process?

On Thu, 21 Aug 2008, Michal Hocko wrote:

> On Thursday 21 August 2008 12:58:46 pm Alan Stern wrote:
> > Can anyone tell me how to raise the priority of one thread in a
> > multi-threaded process (using the pthreads library)?  Neither nice(2)
> > nor setpriority(2) is appropriate since they affect the priority of an
> > entire process rather than a single thread.
> 
> Isn't pthread_setschedprio, what you are looking for?

Actually I was looking for pthread_setschedparam().  But it wasn't 
clear at first that I needed to change the policy to SCHED_FIFO and 
that special capabilities were needed.  With those changes it seems to 
work correctly.

Thanks for pointing me in the right direction!

Alan Stern

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