From: Rick Jones <rick.jones2@hp.com>
To: Andi Kleen <ak@suse.de>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
David Miller <davem@davemloft.net>,
master@sectorb.msk.ru, hawk@diku.dk, harry@atmos.washington.edu,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: Network performance degradation from 2.6.11.12 to 2.6.16.20
Date: Fri, 22 Sep 2006 09:51:09 -0700 [thread overview]
Message-ID: <4514147D.5040803@hp.com> (raw)
In-Reply-To: <200609221743.40053.ak@suse.de>
> That came from named. It opens lots of sockets with SIOCGSTAMP.
> No idea what it needs that many for.
IIRC ISC BIND named opens a socket for each IP it finds on the system.
Presumeably in this way it "knows" implicitly the destination IP without
using platform-specific recvfrom/whatever extensions and gets some
additional parallelism in the stack on SMP systems.
Why it needs/wants the timestamps I've no idea, I don't think it gets
them that way on all platforms. I suppose the next time I do some named
benchmarking I can try to take a closer look in the source.
rick jones
next prev parent reply other threads:[~2006-09-22 16:51 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-16 16:01 Network performance degradation from 2.6.11.12 to 2.6.16.20 Harry Edmon
2006-06-17 22:35 ` Andrew Morton
2006-06-17 23:23 ` Harry Edmon
2006-06-17 23:56 ` Andrew Morton
2006-06-18 3:16 ` Stephen Hemminger
2006-06-18 23:23 ` Harry Edmon
2006-06-19 13:54 ` Harry Edmon
2006-06-20 2:11 ` Herbert Xu
2006-06-19 14:47 ` Jesper Dangaard Brouer
2006-06-19 15:24 ` Andi Kleen
2006-06-19 17:34 ` Chris Friesen
2006-06-19 20:39 ` Andi Kleen
2006-06-19 18:24 ` Jesper Dangaard Brouer
2006-06-25 21:51 ` Harry Edmon
2006-06-26 4:20 ` Bill Fink
2006-06-25 22:22 ` Willy Tarreau
2006-06-26 5:23 ` Andi Kleen
2006-07-04 11:41 ` Jesper Dangaard Brouer
2006-07-04 11:54 ` Andi Kleen
2006-07-10 10:55 ` Jesper Dangaard Brouer
2006-09-16 12:08 ` Vladimir B. Savkin
2006-09-18 8:35 ` Andi Kleen
2006-09-18 9:03 ` Vladimir B. Savkin
2006-09-18 9:58 ` Andi Kleen
2006-09-18 10:29 ` Vladimir B. Savkin
2006-09-18 11:27 ` Andi Kleen
2006-09-18 15:38 ` Alexey Kuznetsov
2006-09-18 15:54 ` Andi Kleen
2006-09-18 16:28 ` Alexey Kuznetsov
2006-09-18 16:50 ` Andi Kleen
2006-09-18 21:03 ` Alexey Kuznetsov
2006-09-18 21:22 ` David Miller
2006-09-18 21:46 ` Alexey Kuznetsov
2006-09-19 5:55 ` Andi Kleen
2006-09-19 20:31 ` Thomas Graf
2006-09-19 20:43 ` Andi Kleen
2006-09-19 5:52 ` Andi Kleen
2006-09-18 21:18 ` Vladimir B. Savkin
2006-09-18 22:00 ` Alexey Kuznetsov
2006-09-18 21:57 ` David Lang
2006-09-19 19:40 ` David Miller
2006-09-19 19:44 ` Stephen Hemminger
2006-09-18 22:03 ` Vladimir B. Savkin
2006-09-19 19:41 ` David Miller
2006-09-19 19:47 ` David Miller
2006-09-22 15:35 ` Alexey Kuznetsov
2006-09-22 15:43 ` Andi Kleen
2006-09-22 16:51 ` Rick Jones [this message]
2007-03-06 13:25 ` Packet timestamps (was: Re: Network performance degradation from 2.6.11.12 to 2.6.16.20) Vladimir B. Savkin
2007-03-06 14:38 ` Eric Dumazet
2007-03-06 14:43 ` Vladimir B. Savkin
2007-03-06 15:16 ` Eric Dumazet
2007-03-06 18:15 ` Vladimir B. Savkin
2006-09-18 21:08 ` Network performance degradation from 2.6.11.12 to 2.6.16.20 Vladimir B. Savkin
2006-09-18 14:09 ` David Miller
2006-09-18 14:29 ` Andi Kleen
2006-09-18 15:19 ` Alan Cox
2006-09-18 15:19 ` Andi Kleen
2006-06-19 16:40 ` Harry Edmon
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