lkml.org 
[lkml]   [2007]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: The performance and behaviour of the anti-fragmentation related patches
On Fri, 2 Mar 2007, William Lee Irwin III wrote:

> On Fri, Mar 02, 2007 at 02:22:56PM -0800, Andrew Morton wrote:
> > Opterons seem to be particularly prone to lock starvation where a cacheline
> > gets captured in a single package for ever.
>
> AIUI that phenomenon is universal to NUMA. Maybe it's time we
> reexamined our locking algorithms in the light of fairness
> considerations.

This is a phenomenon that is usually addressed at the cache logic level.
Its a hardware maturation issue. A certain package should not be allowed
to hold onto a cacheline forever and other packages must have a mininum
time when they can operate on that cacheline.



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-03-03 04:19    [from the cache]
©2003-2011 Jasper Spaans