[Beowulf] Bernhard Kuhn's real time interrupt patch

Patrick Geoffray patrick at myri.com
Fri Mar 25 16:10:15 EST 2005

Hi Andrew,

Andrew Piskorski wrote:
> So I was wondering, has anyone tried that?  I believe the low-latency
> OS-bypass NICs are already doing some fancy mix of polling and waiting
> for slow Linux interrupts, but shouldn't Kuhn's rtirq-patch still
> help?

I don't think this patch improves the interrupt latency or the interrupt 
overhead when there is no contention. Context switching is the metric 
you want to improve.

With OS-bypass NICs, interrupts are rare and there is usually no contention.


Patrick Geoffray
Myricom, Inc.
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

More information about the Beowulf mailing list