From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Minchan Kim <minchan.kim@gmail.com>,
Dave Young <hidave.darkstar@gmail.com>,
linux-mm <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mel Gorman <mel@linux.vnet.ibm.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Christoph Lameter <cl@linux.com>,
Dave Chinner <david@fromorbit.com>,
David Rientjes <rientjes@google.com>
Subject: Re: [RFC][PATCH] mm: cut down __GFP_NORETRY page allocation failures
Date: Fri, 29 Apr 2011 10:58:38 +0800 [thread overview]
Message-ID: <20110429025838.GA13150@localhost> (raw)
In-Reply-To: <20110429022824.GA8061@localhost>
Andrew,
I tested the more realistic 100 dd case. The results are
- nr_alloc_fail: 892 => 146
- reclaim delay: 4ms => 68ms
Thanks,
Fengguang
---
base kernel, 100 dd
-------------------
start time: 3
total time: 52
nr_alloc_fail 892
allocstall 131341
2nd run (no reboot):
start time: 3
total time: 53
nr_alloc_fail 1555
allocstall 265718
CPU count real total virtual total delay total
962 3125524848 3113269116 37972729582
IO count delay total delay average
3 25204838 8ms
SWAP count delay total delay average
0 0 0ms
RECLAIM count delay total delay average
1032 5130797747 4ms
(IPIs accumulated in two runs)
CAL: 34898 35428 35182 35553 35320 35291 35298 35102 Function call interrupts
10ms limit, 100 dd
------------------
start time: 2
total time: 50
nr_alloc_fail 146
allocstall 10598
CPU count real total virtual total delay total
1038 3349490800 3331087137 40156395960
IO count delay total delay average
0 0 0ms
SWAP count delay total delay average
0 0 0ms
RECLAIM count delay total delay average
84 5795410854 68ms
dd: read=0, write=0, cancelled_write=0
Thanks,
Fengguang
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next prev parent reply other threads:[~2011-04-29 2:58 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-26 5:49 readahead and oom Dave Young
2011-04-26 5:55 ` Wu Fengguang
2011-04-26 6:05 ` Dave Young
2011-04-26 6:07 ` Dave Young
2011-04-26 6:25 ` Wu Fengguang
2011-04-26 6:29 ` Dave Young
2011-04-26 6:34 ` Wu Fengguang
2011-04-26 6:50 ` KOSAKI Motohiro
2011-04-26 7:41 ` Minchan Kim
2011-04-26 9:20 ` Wu Fengguang
2011-04-26 9:28 ` Minchan Kim
2011-04-26 10:18 ` Pekka Enberg
2011-04-26 19:47 ` Andrew Morton
2011-04-28 4:19 ` Wu Fengguang
2011-04-28 13:36 ` [RFC][PATCH] mm: cut down __GFP_NORETRY page allocation failures Wu Fengguang
2011-04-28 13:38 ` [patch] vmstat: account " Wu Fengguang
2011-04-28 13:50 ` KOSAKI Motohiro
2011-04-29 2:28 ` [RFC][PATCH] mm: cut down __GFP_NORETRY " Wu Fengguang
2011-04-29 2:58 ` Wu Fengguang [this message]
2011-04-30 14:17 ` Wu Fengguang
2011-05-01 16:35 ` Minchan Kim
2011-05-01 16:37 ` Minchan Kim
2011-05-02 10:14 ` KOSAKI Motohiro
2011-05-03 0:53 ` Minchan Kim
2011-05-03 1:25 ` KOSAKI Motohiro
2011-05-02 10:29 ` Wu Fengguang
2011-05-02 11:08 ` Wu Fengguang
2011-05-03 0:49 ` Minchan Kim
2011-05-03 3:51 ` Wu Fengguang
2011-05-03 4:17 ` Minchan Kim
2011-05-02 13:29 ` Wu Fengguang
2011-05-02 13:49 ` Wu Fengguang
2011-05-03 0:27 ` Satoru Moriya
2011-05-03 2:49 ` Wu Fengguang
2011-05-04 1:56 ` Dave Young
2011-05-04 2:32 ` Dave Young
2011-05-04 2:56 ` Wu Fengguang
2011-05-04 4:23 ` Wu Fengguang
2011-05-04 4:00 ` Wu Fengguang
2011-05-04 7:33 ` Dave Young
2011-04-26 6:13 ` readahead and oom Wu Fengguang
2011-04-26 6:23 ` Dave Young
2011-04-26 9:37 ` [PATCH] mm: readahead page allocations are OK to fail Wu Fengguang
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