Re: Major regression on hackbench with SLUB (more numbers)

Pekka Enberg
2007-12-21T17:44:28Z

Hi,

Christoph Lameter <clameter@sgi.com> wrote:
> > In an extreme case (boot with slub_min_order=9 to get huge page sized
> > slabs) SLUB can win against SLAB:
> >
> > N=10 Time: 0.338 Minimally faster
> > N=20 Time: 0.560 10% faster
> > N=50 Time: 1.353 15% faster

On Dec 21, 2007 2:09 PM, Ingo Molnar <mingo@elte.hu> wrote:
> what's up with this regression? There's been absolutely no activity
> about it in the last 8 days: upstream still regresses, -mm still
> regresses and there are no patches posted for testing.

Christoph, did you see Steven's oprofile results for the hackbench
runs (http://lkml.org/lkml/2007/12/8/198)? Any ideas why we're hitting
add_partial like crazy?

Pekka