From: Rik van Riel <riel@redhat.com>
To: linux-kernel@vger.kernelporg
Cc: linux-mm@kvack.org, lee.schermerhorn@hp.com
Subject: Re: [patch 00/19] VM pageout scalability improvements
Date: Wed, 2 Jan 2008 22:44:50 -0500 [thread overview]
Message-ID: <20080102224450.585bf956@bree.surriel.com> (raw)
In-Reply-To: <20080102224144.885671949@redhat.com>
On Wed, 02 Jan 2008 17:41:44 -0500
linux-kernel@vger.kernelporg wrote:
> This patch series improves VM scalability by:
> 3) switching to SEQ replacement for the anonymous LRUs, so the
> number of pages that need to be scanned when the system
> starts swapping is bound to a reasonable number
I have done some (minimal) testing of this tonight.
Running a 16000 MB fillmem on my 16GB test box (where slub
eats up unexplainable amounts of memory so the test gets about
14GB RSS and 1.5GB in swap).
2.6.24-rc6-mm1
$ time ./fillmem 16000
real 3m43.601s
user 0m11.090s
sys 0m55.274s
2.6.24-rc6-mm1-vmsplit
$ time ./fillmem 16000
real 1m51.323s
user 0m10.638s
sys 0m42.859s
This is after carefully emptying out all memory by rebooting
the system and running fillmem a few times. These results are
repeatable.
With vanilla 2.6.24-rc6-mm1, kswapd eats up 99% of the CPU at
a few points in the test run. This never seems to happen with
the vmsplit kernel.
Unfortunately the symbol file for vanilla 2.6.24-rc6-mm1 seems
to be hosed, so readprofile is not returning anything useful on
that kernel. I'll try to come up with more useful data later.
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next prev parent reply other threads:[~2008-01-03 3:44 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-02 22:41 [patch 00/19] VM pageout scalability improvements linux-kernel
2008-01-02 22:41 ` [patch 01/19] move isolate_lru_page() to vmscan.c linux-kernel
2008-01-02 22:41 ` [patch 02/19] free swap space on swap-in/activation linux-kernel
2008-01-02 22:41 ` [patch 03/19] define page_file_cache() function linux-kernel
2008-01-02 22:41 ` [patch 04/19] debugging checks for page_file_cache() linux-kernel
2008-01-02 22:41 ` [patch 05/19] Use an indexed array for LRU variables linux-kernel
2008-01-02 22:41 ` [patch 06/19] split LRU lists into anon & file sets linux-kernel
2008-01-07 9:23 ` KAMEZAWA Hiroyuki
2008-01-02 22:41 ` [patch 07/19] split anon & file LRUs for memcontrol code linux-kernel
2008-01-07 10:04 ` KAMEZAWA Hiroyuki
2008-01-07 14:10 ` Balbir Singh
2008-01-07 15:23 ` Rik van Riel
2008-01-02 22:41 ` [patch 08/19] SEQ replacement for anonymous pages linux-kernel
2008-01-02 22:41 ` [patch 09/19] add newly swapped in pages to the inactive list linux-kernel
2008-01-02 22:41 ` [patch 10/19] No Reclaim LRU Infrastructure linux-kernel
2008-01-02 22:41 ` [patch 11/19] Non-reclaimable page statistics linux-kernel
2008-01-02 22:41 ` [patch 12/19] scan noreclaim list for reclaimable pages linux-kernel
2008-01-02 22:41 ` [patch 13/19] ramfs pages are non-reclaimable linux-kernel
2008-01-02 22:41 ` [patch 14/19] SHM_LOCKED pages are nonreclaimable linux-kernel
2008-01-02 22:41 ` [patch 15/19] non-reclaimable mlocked pages linux-kernel
2008-01-02 22:42 ` [patch 16/19] mlock vma pages under mmap_sem held for read linux-kernel
2008-01-02 22:42 ` [patch 17/19] handle mlocked pages during map/unmap and truncate linux-kernel
2008-01-02 22:42 ` [patch 18/19] account mlocked pages linux-kernel
2008-01-02 22:42 ` [patch 19/19] cull non-reclaimable anon pages from the LRU at fault time linux-kernel
2008-01-02 23:17 ` [patch 00/19] VM pageout scalability - one big patch Rik van Riel
2008-01-03 3:44 ` Rik van Riel [this message]
2008-01-10 2:39 ` [patch 00/19] VM pageout scalability improvements Christoph Lameter
2008-01-10 3:14 ` Rik van Riel
2008-01-03 16:52 ` Lee Schermerhorn
2008-01-03 17:00 ` Rik van Riel
2008-01-03 17:13 ` Lee Schermerhorn
2008-01-03 22:00 ` Rik van Riel
2008-01-04 16:25 ` Lee Schermerhorn
2008-01-04 16:34 ` Andi Kleen
2008-01-04 16:55 ` Rik van Riel
2008-01-04 18:07 ` Larry Woodman
2008-01-04 17:06 ` Lee Schermerhorn
2008-01-07 19:07 ` Christoph Lameter
2008-01-07 19:32 ` Rik van Riel
2008-01-07 10:06 ` KAMEZAWA Hiroyuki
2008-01-07 15:18 ` Rik van Riel
-- strict thread matches above, loose matches on Subject: below --
2008-01-08 20:59 Rik van Riel
2008-01-10 4:39 ` Mike Snitzer
2008-01-10 15:41 ` Rik van Riel
2008-01-10 16:08 ` Mike Snitzer
2008-01-11 10:41 ` Balbir Singh
2008-01-11 15:38 ` Rik van Riel
2008-01-11 11:47 ` Balbir Singh
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