From: Mel Gorman <mel@csn.ul.ie>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Linux Memory Management List <linux-mm@kvack.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Christoph Lameter <cl@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Nick Piggin <npiggin@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Zhang Yanmin <yanmin_zhang@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2
Date: Thu, 26 Feb 2009 11:03:36 +0000 [thread overview]
Message-ID: <20090226110336.GC32756@csn.ul.ie> (raw)
In-Reply-To: <1235639427.11390.11.camel@minggr>
On Thu, Feb 26, 2009 at 05:10:27PM +0800, Lin Ming wrote:
> We tested this v2 patch series with 2.6.29-rc6 on different machines.
>
Wonderful, thanks.
> 4P qual-core 2P qual-core 2P qual-core HT
> tigerton stockley Nehalem
> ------------------------------------------------
> tbench +3% +2% 0%
Nice.
> oltp -2% 0% 0%
This is a big disappointment and somewhat confusing that it is so
severe. For sysbench I was seeing on six different machines;
50834.14 51763.08 1.79%
61852.08 61966.58 0.18%
5935.98 5980.06 0.74%
29227.78 30167.72 3.12%
66702.67 66534.76 -0.25%
26643.18 26542.59 -0.38%
So, two smallish regressions but mainly gains. Then again, I'm becoming
more and more convinced that sysbench doesn't really represent a proper
OLTP workload.
I'd like to understand more how the page allocator at least was being used
during your tests. Would it be possible to get a full profile (including
instruction if possible and the vmlinux file) for both kernels please?
If you can get the profiles, confirm the regression is still there as
sometimes profiling can alter the outcome. Even if this happens, the
profile will tell me where time is being spent.
> aim7 0% 0% 0%
> specjbb2005 +3% 0% 0%
> hackbench 0% 0% 0%
>
> netperf:
> TCP-S-112k 0% -1% 0%
> TCP-S-64k 0% -1% +1%
> TCP-RR-1 0% 0% +1%
> UDP-U-4k -2% 0% -2%
Pekka, for this test was SLUB or the page allocator handling the 4K
allocations?
> UDP-U-1k +3% 0% 0%
> UDP-RR-1 0% 0% 0%
> UDP-RR-512 -1% 0% +1%
>
> Lin Ming
>
Thanks a million for testing.
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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next prev parent reply other threads:[~2009-02-26 11:03 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-24 12:16 [RFC PATCH 00/19] Cleanup and optimise the page allocator V2 Mel Gorman
2009-02-24 12:16 ` [PATCH 01/19] Replace __alloc_pages_internal() with __alloc_pages_nodemask() Mel Gorman
2009-02-24 12:16 ` [PATCH 02/19] Do not sanity check order in the fast path Mel Gorman
2009-02-24 12:16 ` [PATCH 03/19] Do not check NUMA node ID when the caller knows the node is valid Mel Gorman
2009-02-24 17:17 ` Christoph Lameter
2009-02-24 12:17 ` [PATCH 04/19] Convert gfp_zone() to use a table of precalculated values Mel Gorman
2009-02-24 16:43 ` Christoph Lameter
2009-02-24 17:07 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 05/19] Re-sort GFP flags and fix whitespace alignment for easier reading Mel Gorman
2009-02-24 12:17 ` [PATCH 06/19] Check only once if the zonelist is suitable for the allocation Mel Gorman
2009-02-24 17:24 ` Christoph Lameter
2009-02-24 12:17 ` [PATCH 07/19] Break up the allocator entry point into fast and slow paths Mel Gorman
2009-02-24 12:17 ` [PATCH 08/19] Simplify the check on whether cpusets are a factor or not Mel Gorman
2009-02-24 17:27 ` Christoph Lameter
2009-02-24 17:55 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 09/19] Move check for disabled anti-fragmentation out of fastpath Mel Gorman
2009-02-24 12:17 ` [PATCH 10/19] Calculate the preferred zone for allocation only once Mel Gorman
2009-02-24 17:31 ` Christoph Lameter
2009-02-24 17:53 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 11/19] Calculate the migratetype " Mel Gorman
2009-02-24 12:17 ` [PATCH 12/19] Calculate the alloc_flags " Mel Gorman
2009-02-24 12:17 ` [PATCH 13/19] Inline __rmqueue_smallest() Mel Gorman
2009-02-24 12:17 ` [PATCH 14/19] Inline buffered_rmqueue() Mel Gorman
2009-02-24 12:17 ` [PATCH 15/19] Do not call get_pageblock_migratetype() more than necessary Mel Gorman
2009-02-24 12:17 ` [PATCH 16/19] Do not disable interrupts in free_page_mlock() Mel Gorman
2009-02-24 12:17 ` [PATCH 17/19] Do not setup zonelist cache when there is only one node Mel Gorman
2009-02-24 12:17 ` [PATCH 18/19] Do not check for compound pages during the page allocator sanity checks Mel Gorman
2009-02-24 12:17 ` [PATCH 19/19] Split per-cpu list into one-list-per-migrate-type Mel Gorman
2009-02-26 9:10 ` [RFC PATCH 00/19] Cleanup and optimise the page allocator V2 Lin Ming
2009-02-26 9:26 ` Pekka Enberg
2009-02-26 9:27 ` Lin Ming
2009-02-26 11:03 ` Mel Gorman [this message]
2009-02-26 11:18 ` Pekka Enberg
2009-02-26 11:22 ` Mel Gorman
2009-02-26 12:27 ` Lin Ming
2009-02-27 8:44 ` Lin Ming
2009-03-02 11:21 ` Mel Gorman
2009-03-02 11:39 ` Nick Piggin
2009-03-02 12:16 ` Mel Gorman
2009-03-03 4:42 ` Nick Piggin
2009-03-03 8:25 ` Mel Gorman
2009-03-03 9:04 ` Nick Piggin
2009-03-03 13:51 ` Mel Gorman
2009-03-03 16:31 ` Christoph Lameter
2009-03-03 21:48 ` Mel Gorman
2009-03-04 2:05 ` Zhang, Yanmin
2009-03-04 7:23 ` Peter Zijlstra
2009-03-04 8:31 ` Zhang, Yanmin
2009-03-04 9:07 ` Nick Piggin
2009-03-05 1:56 ` Zhang, Yanmin
2009-03-05 10:34 ` Ingo Molnar
2009-03-06 8:33 ` Lin Ming
2009-03-06 9:39 ` Ingo Molnar
2009-03-06 13:03 ` Mel Gorman
2009-03-09 1:50 ` Zhang, Yanmin
2009-03-09 7:31 ` Lin Ming
2009-03-09 7:03 ` Lin Ming
2009-03-04 18:04 ` Mel Gorman
2009-02-26 16:28 ` Christoph Lameter
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