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

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To: Linus Torvalds <torvalds@...>
Cc: Christoph Lameter <clameter@...>, Pekka Enberg <penberg@...>, Steven Rostedt <rostedt@...>, LKML <linux-kernel@...>, Andrew Morton <akpm@...>, Peter Zijlstra <a.p.zijlstra@...>, Christoph Hellwig <hch@...>, Rafael J. Wysocki <rjw@...>
Date: Friday, December 21, 2007 - 7:17 pm

* Linus Torvalds <torvalds@linux-foundation.org> wrote:


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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Messages in current thread:
Major regression on hackbench with SLUB, Steven Rostedt, (Fri Dec 7, 1:50 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Thu Dec 13, 6:22 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 14, 12:24 am)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 6:22 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 6:37 pm)
Re: Major regression on hackbench with SLUB (more numbers), Steven Rostedt, (Fri Dec 21, 6:52 pm)
Re: Major regression on hackbench with SLUB (more numbers), Linus Torvalds, (Fri Dec 21, 6:51 pm)
Re: Major regression on hackbench with SLUB (more numbers), Ingo Molnar, (Fri Dec 21, 7:17 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 7:54 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 12:18 pm)
Re: Major regression on hackbench with SLUB (more numbers), Linus Torvalds, (Fri Dec 21, 12:44 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 6:11 pm)
Re: Major regression on hackbench with SLUB (more numbers), Linus Torvalds, (Fri Dec 21, 6:49 pm)
Re: Major regression on hackbench with SLUB (more numbers), Peter Zijlstra, (Fri Dec 21, 6:16 pm)
Re: Major regression on hackbench with SLUB (more numbers), Peter Zijlstra, (Fri Dec 21, 6:17 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 6:27 pm)
Re: Major regression on hackbench with SLUB (more numbers), Linus Torvalds, (Sat Dec 22, 2:01 pm)
Re: Major regression on hackbench with SLUB (more numbers), Linus Torvalds, (Sat Dec 22, 5:00 pm)
Re: Major regression on hackbench with SLUB (more numbers), Steven Rostedt, (Sat Dec 22, 8:59 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Mon Dec 24, 3:21 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Wed Dec 26, 5:31 pm)
Re: Major regression on hackbench with SLUB (more numbers), Steven Rostedt, (Fri Dec 28, 10:52 am)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Thu Dec 27, 1:51 am)
SLUB sysfs support, Christoph Lameter, (Thu Dec 27, 4:28 pm)
Re: SLUB sysfs support, Al Viro, (Thu Dec 27, 6:59 pm)
Re: SLUB sysfs support, Christoph Lameter, (Thu Dec 27, 7:22 pm)
Re: SLUB sysfs support, Al Viro, (Thu Dec 27, 7:54 pm)
Re: SLUB sysfs support, Christoph Lameter, (Thu Dec 27, 7:53 pm)
Re: SLUB sysfs support, Al Viro, (Thu Dec 27, 7:58 pm)
Re: SLUB sysfs support, Christoph Lameter, (Thu Dec 27, 8:02 pm)
Re: SLUB sysfs support, Al Viro, (Thu Dec 27, 8:45 pm)
Re: SLUB sysfs support, Christoph Lameter, (Thu Dec 27, 10:19 pm)
Re: SLUB sysfs support, Al Viro, (Thu Dec 27, 11:26 pm)
Re: SLUB sysfs support, Christoph Lameter, (Wed Jan 2, 4:25 pm)
[patch] slub: provide /proc/slabinfo, Ingo Molnar, (Tue Jan 1, 12:23 pm)
Re: [patch] slub: provide /proc/slabinfo, Arjan van de Ven, (Fri Jan 4, 8:27 pm)
Re: [patch] slub: provide /proc/slabinfo, Linus Torvalds, (Fri Jan 4, 8:49 pm)
Re: Major regression on hackbench with SLUB (more numbers), Jason L Tibbitts III, (Sat Dec 22, 6:52 pm)
Re: Major regression on hackbench with SLUB (more numbers), Alessandro Suardi, (Sun Dec 23, 11:59 pm)
Re: Major regression on hackbench with SLUB (more numbers), Alexey Dobriyan, (Sat Dec 22, 9:01 am)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 7:51 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Mon Dec 24, 3:24 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 12:26 pm)
Re: Major regression on hackbench with SLUB (more numbers), Christoph Lameter, (Fri Dec 21, 5:56 pm)
Re: Major regression on hackbench with SLUB (more numbers), Steven Rostedt, (Fri Dec 14, 2:15 am)
Re: Major regression on hackbench with SLUB, Linus Torvalds, (Fri Dec 7, 1:59 pm)
Re: Major regression on hackbench with SLUB, Linus Torvalds, (Fri Dec 7, 2:36 pm)
Re: Major regression on hackbench with SLUB, Christoph Lameter, (Thu Dec 13, 6:11 pm)
Re: Major regression on hackbench with SLUB, Steven Rostedt, (Sat Dec 8, 8:28 pm)
Re: Major regression on hackbench with SLUB, Steven Rostedt, (Sat Dec 8, 6:16 pm)
Re: Major regression on hackbench with SLUB, Björn, (Mon Dec 10, 3:38 am)
Re: Major regression on hackbench with SLUB, Steven Rostedt, (Mon Dec 10, 10:00 am)
Re: Major regression on hackbench with SLUB, Steven Rostedt, (Fri Dec 7, 2:58 pm)
Re: Major regression on hackbench with SLUB, Ingo Molnar, (Fri Dec 7, 1:55 pm)