> On Mon, 12 Mar 2007 19:32:11 -0700 (PDT) David Miller <davem@xxxxxxxxxxxxx> wrote: > From: David Miller <davem@xxxxxxxxxxxxx> > Date: Mon, 12 Mar 2007 19:26:16 -0700 (PDT) > > > From: Paul Mackerras <paulus@xxxxxxxxx> > > Date: Tue, 13 Mar 2007 11:37:32 +1100 > > > > > David Miller writes: > > > > > > > I ported this to sparc64 as per the patch below, tested on > > > > UP SunBlade1500 and 24 cpu Niagara T1000. > > > > > > Did you see any performance improvement? We used to have quicklists > > > on ppc, but I remain to be convinced that they actually help. > > > > It shaved about 3 or 4 seconds consistently off of my kernel > > build on Niagara which usually clocks in just over 4 minutes > > on this 24 thread machine. > > I want to quantify this with the fact that all the cache false sharing > issues are irrelevant in this test because the L2 cache is shared > between all of the cpu threads on Niagara. > > It was fast just because the quicklists were lighter weight than the > SLAB stuff. So... what would happen if sparc64 were to use neither quicklists nor slab? Just grab these pages from the page allocator and clear them? - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|