From: Denys Fedoryshchenko <denys@visp.net.lb>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Joe Malicki <jmalicki@metacarta.com>,
David Miller <davem@davemloft.net>,
johnpol@2ka.mipt.ru, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, juhlenko@akamai.com,
sammy@sammy.net
Subject: Re: loaded router, excessive getnstimeofday in oprofile
Date: Thu, 28 Aug 2008 22:55:29 +0300 [thread overview]
Message-ID: <200808282255.29640.denys@visp.net.lb> (raw)
In-Reply-To: <48B6FE6C.4080905@cosmosbay.com>
On Thursday 28 August 2008, Eric Dumazet wrote:
> OK, please try oprofile with call graph analysis.
I did already. Even because most of programs (except ripd/zebra) can be
killed, and i kill them, it doesn't change almost anything.
it seems heavy things causing instability:
1)HTB (resolution can be lowered to improve performance, i will try Jarek
patch soon)
2)ocassionally ping/tcpdump other SO_TIMESTAMP users
3)Probably softlockup detection. Disabled already, i will come back to it
soon, if it is required.
One of other issues i notice - "CACHE MISS" cause maybe almost 5-10% in
oprofile in u32, but i am not sure it is interesting subject to discuss. I
have to optimize all my iproute2 rules first.
next prev parent reply other threads:[~2008-08-28 19:56 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-22 1:57 loaded router, excessive getnstimeofday in oprofile Denys Fedoryshchenko
2008-08-22 2:23 ` Denys Fedoryshchenko
2008-08-26 9:51 ` Jarek Poplawski
2008-08-26 10:29 ` Denys Fedoryshchenko
2008-08-26 10:47 ` Jarek Poplawski
2008-08-26 10:49 ` Denys Fedoryshchenko
2008-08-26 11:07 ` Jarek Poplawski
2008-08-26 11:15 ` Jarek Poplawski
2008-08-26 11:16 ` Denys Fedoryshchenko
2008-08-26 11:32 ` Jarek Poplawski
2008-08-26 11:32 ` Denys Fedoryshchenko
2008-08-26 20:14 ` Evgeniy Polyakov
2008-08-26 20:44 ` Eric Dumazet
2008-08-26 20:51 ` Evgeniy Polyakov
2008-08-27 12:09 ` Denys Fedoryshchenko
2008-08-27 12:36 ` Evgeniy Polyakov
2008-08-27 14:00 ` Denys Fedoryshchenko
2008-08-27 14:23 ` Evgeniy Polyakov
2008-08-27 12:54 ` Andi Kleen
2008-08-27 16:07 ` Rick Jones
2008-08-27 16:27 ` Andi Kleen
2008-08-27 16:49 ` Rick Jones
2008-08-27 16:56 ` Andi Kleen
2008-08-27 16:57 ` Rick Jones
2008-08-27 17:27 ` Eric Dumazet
2008-08-27 18:32 ` loaded router, excessive getnstimeofday in oprofile\ Andi Kleen
2008-08-27 22:23 ` David Miller
2008-08-27 22:38 ` Andi Kleen
2008-08-27 22:18 ` loaded router, excessive getnstimeofday in oprofile David Miller
2008-08-27 22:39 ` Andi Kleen
2008-08-28 0:45 ` Nick Piggin
2008-08-28 0:48 ` David Miller
2008-08-28 1:07 ` Nick Piggin
2008-08-27 16:17 ` Stephen Hemminger
2008-08-27 17:14 ` Jarek Poplawski
2008-08-27 21:34 ` David Miller
2008-08-28 2:39 ` Jason Uhlenkott
2008-08-28 3:10 ` David Miller
2008-08-28 6:28 ` Joe Malicki
2008-08-28 7:22 ` Andi Kleen
2008-08-28 15:02 ` Denys Fedoryshchenko
2008-08-28 19:01 ` Ilpo Järvinen
2008-08-28 19:31 ` David Miller
2008-08-28 16:48 ` Denys Fedoryshchenko
2008-08-28 16:56 ` Andi Kleen
2008-08-28 18:57 ` Eric Dumazet
2008-08-28 19:25 ` Denys Fedoryshchenko
2008-08-28 19:37 ` Eric Dumazet
2008-08-28 19:55 ` Denys Fedoryshchenko [this message]
2008-08-29 15:43 ` Stephen Hemminger
2008-08-28 19:36 ` David Miller
2008-08-28 19:59 ` Denys Fedoryshchenko
2008-08-29 15:21 ` Joe Malicki
2008-08-29 15:30 ` Andi Kleen
2008-08-29 15:43 ` Joe Malicki
2008-08-29 20:43 ` Evgeniy Polyakov
2008-08-28 18:00 ` Rick Jones
2008-08-28 19:42 ` David Miller
2008-08-28 20:29 ` Rick Jones
2008-08-28 20:32 ` David Miller
2008-08-28 20:45 ` Rick Jones
2008-08-28 20:47 ` David Miller
2008-09-01 2:39 ` Valdis.Kletnieks
2008-09-01 3:51 ` David Miller
2008-09-01 4:08 ` Valdis.Kletnieks
2008-09-01 4:10 ` David Miller
2008-09-02 17:04 ` Rick Jones
2008-08-28 3:35 ` Stephen Hemminger
2008-08-28 8:49 ` Denys Fedoryshchenko
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