From: "Denys" <nuclearcat@nuclearcat.com>
To: linux-kernel@vger.kernel.org
Subject: 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression
Date: Sun, 30 Sep 2007 18:22:18 +0300 [thread overview]
Message-ID: <20070930152218.M1504@nuclearcat.com> (raw)
P.S. It seems SLAB/SLUB doesn't make much difference, just seems SLUB use a
bit more some resources.
Still problem appearing with softirqd/0 or softirqd/1 taking a lot CPU (while
on 2.6.21 it never came up of the "top"), and doesn't matter - if NAPI on
e1000 disabled or enabled. Additionally disabling all disk operations doesn't
make any difference.
defaulthost ~ #mpstat 1
Linux 2.6.23-rc8-build-0017 (defaulthost) 09/30/07
21:20:29 CPU %user %nice %sys %iowait %irq %soft %steal
%idle intr/s
21:20:30 all 21.11 0.00 14.57 8.04 0.00 48.74 0.00
7.54 3632.00
21:20:31 all 23.38 0.00 12.94 10.95 0.00 52.74 0.00
0.00 1524.00
21:20:32 all 21.50 0.00 16.50 8.50 0.00 53.50 0.00
0.00 1473.00
21:20:33 all 22.39 0.00 14.93 4.98 0.50 53.23 0.00
3.98 1492.08
21:20:34 all 5.31 0.00 0.97 0.48 0.00 93.24 0.00
0.00 1351.96
On 2.6.21 it looks:
defaulthost ~ #mpstat 1
Linux 2.6.21-gentoo-r3-build-0015 (defaulthost) 09/30/07
18:21:50 CPU %user %nice %sys %iowait %irq %soft %steal
%idle intr/s
18:21:51 all 29.50 0.00 21.50 12.50 0.00 6.00 0.00
30.50 8416.00
18:21:52 all 26.00 0.00 19.00 12.50 0.50 7.00 0.00
35.00 8663.64
18:21:53 all 27.23 0.00 17.82 13.37 0.99 6.44 0.00
34.16 7828.71
18:21:54 all 26.13 0.00 16.08 18.59 0.00 7.04 0.00
32.16 8657.58
18:21:55 all 22.89 0.00 16.92 18.91 0.50 6.47 0.00
34.33 7957.43
18:21:56 all 28.14 0.00 21.61 17.59 0.50 6.03 0.00
26.13 8531.00
--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.
next reply other threads:[~2007-09-30 15:22 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-30 15:22 Denys [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-09-30 17:31 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression Denys
2007-09-30 14:48 Denys
2007-09-30 17:48 ` Eric Dumazet
2007-09-30 4:25 ` Nick Piggin
2007-09-30 22:04 ` Denys
2007-10-01 10:01 ` Andi Kleen
2007-10-01 10:30 ` Denys
2007-10-01 11:14 ` Andi Kleen
2007-10-01 11:52 ` Denys
2007-10-01 11:57 ` Andi Kleen
2007-10-01 12:04 ` Denys
2007-09-30 22:35 ` Denys
2007-10-01 5:59 ` Eric Dumazet
2007-10-01 7:12 ` David Miller
2007-10-01 8:07 ` Denys
2007-10-01 8:20 ` Eric Dumazet
2007-10-01 8:35 ` Eric Dumazet
2007-10-01 12:10 ` Denys
2007-10-01 13:26 ` Denys
2007-10-01 20:10 ` Eric Dumazet
2007-10-01 20:57 ` David Miller
2007-09-30 23:24 ` Denys
2007-10-01 6:43 ` Denys
2007-09-30 18:45 ` Denys
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