From: Peter Zijlstra <peterz@infradead.org>
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>,
Nick Piggin <npiggin@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2
Date: Wed, 04 Mar 2009 08:23:34 +0100 [thread overview]
Message-ID: <1236151414.5330.6692.camel@laptop> (raw)
In-Reply-To: <1236132307.2567.25.camel@ymzhang>
On Wed, 2009-03-04 at 10:05 +0800, Zhang, Yanmin wrote:
> FAIR_GROUP_SCHED is a feature to support configurable cpu weight for different users.
> We did find it takes lots of time to check/update the share weight which might create
> lots of cache ping-pang. With sysbench(oltp)+mysql, that becomes more severe because
> mysql runs as user mysql and sysbench runs as another regular user. When starting
> the testing with 1 thread in command line, there are 2 mysql threads and 1 sysbench
> thread are proactive.
cgroup based group scheduling doesn't bother with users. So unless you
create sched-cgroups your should all be in the same (root) group.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
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>,
Nick Piggin <npiggin@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC PATCH 00/19] Cleanup and optimise the page allocator V2
Date: Wed, 04 Mar 2009 08:23:34 +0100 [thread overview]
Message-ID: <1236151414.5330.6692.camel@laptop> (raw)
In-Reply-To: <1236132307.2567.25.camel@ymzhang>
On Wed, 2009-03-04 at 10:05 +0800, Zhang, Yanmin wrote:
> FAIR_GROUP_SCHED is a feature to support configurable cpu weight for different users.
> We did find it takes lots of time to check/update the share weight which might create
> lots of cache ping-pang. With sysbench(oltp)+mysql, that becomes more severe because
> mysql runs as user mysql and sysbench runs as another regular user. When starting
> the testing with 1 thread in command line, there are 2 mysql threads and 1 sysbench
> thread are proactive.
cgroup based group scheduling doesn't bother with users. So unless you
create sched-cgroups your should all be in the same (root) group.
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next prev parent reply other threads:[~2009-03-04 7:24 UTC|newest]
Thread overview: 118+ 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 ` 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 ` 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 ` 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 12:16 ` Mel Gorman
2009-02-24 17:17 ` Christoph Lameter
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 12:17 ` Mel Gorman
2009-02-24 16:43 ` Christoph Lameter
2009-02-24 16:43 ` Christoph Lameter
2009-02-24 17:07 ` Mel Gorman
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 ` 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 12:17 ` Mel Gorman
2009-02-24 17:24 ` Christoph Lameter
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 ` 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 12:17 ` Mel Gorman
2009-02-24 17:27 ` Christoph Lameter
2009-02-24 17:27 ` Christoph Lameter
2009-02-24 17:55 ` Mel Gorman
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 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 10/19] Calculate the preferred zone for allocation only once Mel Gorman
2009-02-24 12:17 ` Mel Gorman
2009-02-24 17:31 ` Christoph Lameter
2009-02-24 17:31 ` Christoph Lameter
2009-02-24 17:53 ` Mel Gorman
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 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 12/19] Calculate the alloc_flags " Mel Gorman
2009-02-24 12:17 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 13/19] Inline __rmqueue_smallest() Mel Gorman
2009-02-24 12:17 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 14/19] Inline buffered_rmqueue() Mel Gorman
2009-02-24 12:17 ` 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 ` 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 ` 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 ` 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 ` Mel Gorman
2009-02-24 12:17 ` [PATCH 19/19] Split per-cpu list into one-list-per-migrate-type Mel Gorman
2009-02-24 12:17 ` Mel Gorman
2009-02-26 9:10 ` [RFC PATCH 00/19] Cleanup and optimise the page allocator V2 Lin Ming
2009-02-26 9:10 ` Lin Ming
2009-02-26 9:26 ` Pekka Enberg
2009-02-26 9:26 ` Pekka Enberg
2009-02-26 9:27 ` Lin Ming
2009-02-26 9:27 ` Lin Ming
2009-02-26 11:03 ` Mel Gorman
2009-02-26 11:03 ` Mel Gorman
2009-02-26 11:18 ` Pekka Enberg
2009-02-26 11:18 ` Pekka Enberg
2009-02-26 11:22 ` Mel Gorman
2009-02-26 11:22 ` Mel Gorman
2009-02-26 12:27 ` Lin Ming
2009-02-26 12:27 ` Lin Ming
2009-02-27 8:44 ` Lin Ming
2009-02-27 8:44 ` Lin Ming
2009-03-02 11:21 ` Mel Gorman
2009-03-02 11:21 ` Mel Gorman
2009-03-02 11:39 ` Nick Piggin
2009-03-02 11:39 ` Nick Piggin
2009-03-02 12:16 ` Mel Gorman
2009-03-02 12:16 ` Mel Gorman
2009-03-03 4:42 ` Nick Piggin
2009-03-03 4:42 ` Nick Piggin
2009-03-03 8:25 ` Mel Gorman
2009-03-03 8:25 ` Mel Gorman
2009-03-03 9:04 ` Nick Piggin
2009-03-03 9:04 ` Nick Piggin
2009-03-03 13:51 ` Mel Gorman
2009-03-03 13:51 ` Mel Gorman
2009-03-03 16:31 ` Christoph Lameter
2009-03-03 16:31 ` Christoph Lameter
2009-03-03 21:48 ` Mel Gorman
2009-03-03 21:48 ` Mel Gorman
2009-03-04 2:05 ` Zhang, Yanmin
2009-03-04 2:05 ` Zhang, Yanmin
2009-03-04 7:23 ` Peter Zijlstra [this message]
2009-03-04 7:23 ` Peter Zijlstra
2009-03-04 8:31 ` Zhang, Yanmin
2009-03-04 8:31 ` Zhang, Yanmin
2009-03-04 9:07 ` Nick Piggin
2009-03-04 9:07 ` Nick Piggin
2009-03-05 1:56 ` Zhang, Yanmin
2009-03-05 1:56 ` Zhang, Yanmin
2009-03-05 10:34 ` Ingo Molnar
2009-03-05 10:34 ` Ingo Molnar
2009-03-06 8:33 ` Lin Ming
2009-03-06 8:33 ` Lin Ming
2009-03-06 9:39 ` Ingo Molnar
2009-03-06 9:39 ` Ingo Molnar
2009-03-06 13:03 ` Mel Gorman
2009-03-06 13:03 ` Mel Gorman
2009-03-09 1:50 ` Zhang, Yanmin
2009-03-09 1:50 ` Zhang, Yanmin
2009-03-09 7:31 ` Lin Ming
2009-03-09 7:31 ` Lin Ming
2009-03-09 7:03 ` Lin Ming
2009-03-09 7:03 ` Lin Ming
2009-03-04 18:04 ` Mel Gorman
2009-03-04 18:04 ` Mel Gorman
2009-02-26 16:28 ` Christoph Lameter
2009-02-26 16:28 ` Christoph Lameter
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