On Tue, 13 Dec 2011, David Rientjes wrote:
> > > {
> > > n->nr_partial++;
> > > - if (tail == DEACTIVATE_TO_TAIL)
> > > - list_add_tail(&page->lru, &n->partial);
> > > - else
> > > - list_add(&page->lru, &n->partial);
> > > + list_add_tail(&page->lru, &n->partial);
> > > }
> > >
2 machines (one netserver, one netperf) both with 16 cores, 64GB memory
with netperf-2.4.5 comparing Linus' -git with and without this patch:
threads SLUB SLUB+patch
16 116614 117213 (+0.5%)
32 216436 215065 (-0.6%)
48 299991 299399 (-0.2%)
64 373753 374617 (+0.2%)
80 435688 435765 (UNCH)
96 494630 496590 (+0.4%)
112 546766 546259 (-0.1%)
This suggests the difference is within the noise, so this patch neither
helps nor hurts netperf on my setup, as expected.
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