Re: Major regression on hackbench with SLUB (more numbers)
[Posted December 28, 2007 by corbet]
| From: |
| Ingo Molnar <mingo-AT-elte.hu> |
| To: |
| Linus Torvalds <torvalds-AT-linux-foundation.org> |
| Subject: |
| Re: Major regression on hackbench with SLUB (more numbers) |
| Date: |
| Sat, 22 Dec 2007 00:17:28 +0100 |
| Message-ID: |
| <20071221231728.GA28008@elte.hu> |
| Cc: |
| Christoph Lameter <clameter-AT-sgi.com>,
Pekka Enberg <penberg-AT-cs.helsinki.fi>,
Steven Rostedt <rostedt-AT-goodmis.org>,
LKML <linux-kernel-AT-vger.kernel.org>,
Andrew Morton <akpm-AT-linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra-AT-chello.nl>,
Christoph Hellwig <hch-AT-infradead.org>,
"Rafael J. Wysocki" <rjw-AT-sisk.pl> |
| Archive‑link: | |
Article |
* Linus Torvalds <torvalds@linux-foundation.org> wrote:
> And now, can the people who made the problem reports and complained
> about SLUB please test the patch - the ball is now in your court!
yep, and i ran a quick comparison test on a 2-core box with 3 kernels:
[ best of 5 runs in a row which had a relative jitter of less than 10% ]
MIN v2.6.24.slab v2.6.24.slub v2.6.24.slub.fix
----------------------------------------------------------
mmap: 429.00 402.00 ( -6%) 385.00 (-10%)
select: 11.38 10.46 ( -8%) 11.41 ( 0%)
proc-exec: 121.52 116.77 ( -3%) 120.77 ( 0%)
proc-fork: 106.84 106.19 ( 0%) 107.92 ( 1%)
syscall-open: 3.09 3.13 ( 1%) 3.25 ( 4%)
hackbench-50: 2.85 3.47 ( 21%) 2.88 ( 1%)
and the regression seems to be largely fixed! Not only is the hackbench
one fixed, but mmap shows an above-noise improvement as well.
Acked-by: Ingo Molnar <mingo@elte.hu>
And i hereby nominate Pekka as SLUB/SLAB co-maintainer and spokesperson
;-)
Ingo
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