[openib-general] Re: LLTX and netif_stop_queue

[Grant Grundler]

On Mon, Jan 03, 2005 at 06:07:00PM +0100, Eric Lemoine wrote:
> If I understand correctly, LLTX aims at avoiding cache misses on lock
> variables (because of cacheline bouncing). So the effect of LLTX
> should increase as the number of CPUs not sharing the same cache
> increases. And two CPUs might not be enough...

Cacheline bouncing usually starts to show up with > 4 CPUs (ie 8 or more).
Some workloads that Jamal cares about (routing) only need 2 cpus.

grant