[Linux-ia64] Re: web page on O(1) scheduler

From: Arjan van de Ven <arjanv_at_redhat.com>
Date: 2003-05-21 19:01:33
On Wed, 2003-05-21 at 08:49, David Mosberger wrote:

> 
> I think the web pages should be most relevant to the HPTC (high
> performance technical computing) community, since this is the
> community that is most likely affected by some of the performance
> oddities of the O(1) scheduler.  Certainly anyone using OpenMP on
> Intel platforms (x86 and ia64) may want to take a look.

oh you mean the OpenMP broken behavior of calling sched_yield() in a
tight loop to implement spinlocks ?

I'd guess that instead of second guessing the runtime, they should use
the pthreads primitives which are the fastest for the platform one would
hope.. (eg futexes nowadays)



Received on Wed May 21 02:02:18 2003

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