Messages in this thread | | | Date | Fri, 14 Dec 2007 01:15:54 -0500 (EST) | From | Steven Rostedt <> | Subject | Re: Major regression on hackbench with SLUB (more numbers) |
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Christoph,
Welcome back from your vacation! :-)
On Thu, 13 Dec 2007, Christoph Lameter 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 >
I booted back to slub with slub_min_order=9 on the 64way and you are indeed right about this.
# tests/hackbench 90 Time: 2.109 # chrt -f 10 tests/hackbench 90 Time: 3.775 # tests/hackbench 90 Time: 1.583 # chrt -f 10 tests/hackbench 90 Time: 1.833 # tests/hackbench 90 Time: 1.601 # chrt -f 10 tests/hackbench 90 Time: 3.078 # tests/hackbench 90 Time: 1.321 # chrt -f 10 tests/hackbench 90 Time: 1.933
A flux between 1.321 and 3.775 (*)(the rt runs were higher). But still, good job at narrowing this down. Now the hard part. Figuring out a way that will be nice to all users.
-- Steve
(*) The previous runs (without the command line option) were 13 seconds or so.
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