On Tue, Apr 24, 2007 at 10:39:48AM -0700, Christoph Lameter wrote: > On Fri, 20 Apr 2007, Siddha, Suresh B wrote: > > > > Last I checked it was workload-dependent, but there were things that > > > hammer it. I mostly know of the remote wakeup issue, but there could > > > be other things besides wakeups that do it, too. > > > > remote wakeup was the main issue and the 0.5% improvement was seen > > on a two node platform. Aligning it reduces the number of remote > > cachelines that needs to be touched as part of this wakeup. > > .5% is usually in the noise ratio. Are you consistently seeing an > improvement or is that sporadic?
No. This is consistent. I am waiting for the perf data on a much much bigger NUMA box. Anyhow, this is a straight forward optimization and needs to be done. Do you have any specific concerns? thanks, suresh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
