From: Nick Piggin <npiggin@suse.de>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: Mel Gorman <mel@csn.ul.ie>, Lin Ming <ming.m.lin@intel.com>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Linux Memory Management List <linux-mm@kvack.org>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Christoph Lameter <cl@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2
Date: Wed, 4 Mar 2009 10:07:40 +0100 [thread overview]
Message-ID: <20090304090740.GA27043@wotan.suse.de> (raw)
In-Reply-To: <1236132307.2567.25.camel@ymzhang>
On Wed, Mar 04, 2009 at 10:05:07AM +0800, Zhang, Yanmin wrote:
> On Mon, 2009-03-02 at 11:21 +0000, Mel Gorman wrote:
> > (Added Ingo as a second scheduler guy as there are queries on tg_shares_up)
> >
> > On Fri, Feb 27, 2009 at 04:44:43PM +0800, Lin Ming wrote:
> > > On Thu, 2009-02-26 at 19:22 +0800, Mel Gorman wrote:
> > > > In that case, Lin, could I also get the profiles for UDP-U-4K please so I
> > > > can see how time is being spent and why it might have gotten worse?
> > >
> > > I have done the profiling (oltp and UDP-U-4K) with and without your v2
> > > patches applied to 2.6.29-rc6.
> > > I also enabled CONFIG_DEBUG_INFO so you can translate address to source
> > > line with addr2line.
> > >
> > > You can download the oprofile data and vmlinux from below link,
> > > http://www.filefactory.com/file/af2330b/
> > >
> >
> > Perfect, thanks a lot for profiling this. It is a big help in figuring out
> > how the allocator is actually being used for your workloads.
> >
> > The OLTP results had the following things to say about the page allocator.
> In case we might mislead you guys, I want to clarify that here OLTP is
> sysbench (oltp)+mysql, not the famous OLTP which needs lots of disks and big
> memory.
>
> Ma Chinang, another Intel guy, does work on the famous OLTP running.
OK, so my comments WRT cache sensitivity probably don't apply here,
but probably cache hotness of pages coming out of the allocator
might still be important for this one.
How many runs are you doing of these tests? Do you have a fairly high
confidence that the changes are significant?
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next prev parent reply other threads:[~2009-03-04 9:07 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
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 [this message]
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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