On Fri, 20 Apr 2007, William Lee Irwin III wrote: >> I'm not really convinced it's all that worthwhile of an optimization, >> essentially for the same reasons as you, but presumably there's a >> benchmark result somewhere that says it matters. I've just not seen it.
On Fri, Apr 20, 2007 at 12:44:55PM -0700, Christoph Lameter wrote: > If it is true that we frequently remotely write the per cpu runqueue > data then we may have a NUMA scalability issue. >From the discussion on Suresh's thread, it appears to have sped up a database benchmark 0.5%. 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. -- wli - 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/
