From: "Denys" <nuclearcat@nuclearcat.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression
Date: Mon, 1 Oct 2007 15:04:19 +0300 [thread overview]
Message-ID: <20071001120231.M48591@nuclearcat.com> (raw)
In-Reply-To: <20071001115721.GB17357@one.firstfloor.org>
That 2.6.21 works fine and 2.6.22 MUCH worse on multiple servers with similar
workload.
Plus all userspace becoming extremely unstable, and definitely ping 127.0.0.1
must not reach 300ms.
On Mon, 1 Oct 2007 13:57:21 +0200, Andi Kleen wrote
> On Mon, Oct 01, 2007 at 02:52:03PM +0300, Denys wrote:
> > Hi
> >
> > No major differences.
> > Some procedures higher a bit, some lower a bit, but everything looks fine on
> > both kernels.
> >
> > Thats what i tried first - oprofile, and only one keypoint i was able to catch
> > - in top softirqd/0 or /1 shows usage 100% cpu, and in mpstat - soft% also
> > reaching 100%.
>
> Then you likely just have higher load. What makes you think this
> is a kernel problem?
>
> -Andi
--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.
next prev parent reply other threads:[~2007-10-01 12:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-30 14:48 2.6.21 -> 2.6.22 & 2.6.23-rc8 performance regression 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 [this message]
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
-- strict thread matches above, loose matches on Subject: below --
2007-09-30 15:22 Denys
2007-09-30 17:31 Denys
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