From: Robert Olsson <Robert.Olsson@data.slu.se>
To: Karsten Desler <kdesler@soohrt.org>
Cc: netdev@oss.sgi.com, linux-kernel@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>, jamal <hadi@cyberus.ca>,
Robert Olsson <Robert.Olsson@data.slu.se>,
P@draigBrady.com
Subject: Re: _High_ CPU usage while routing (mostly) small UDP packets
Date: Tue, 7 Dec 2004 23:40:22 +0100 [thread overview]
Message-ID: <16822.12630.275389.575326@robur.slu.se> (raw)
In-Reply-To: <20041207211035.GA20286@quickstop.soohrt.org>
Karsten Desler writes:
> I totally forgot to mention: There are approximately 100k concurrent
> flows.
> >From dmesg:
> IP: routing cache hash table of 16384 buckets, 128Kbytes
You can take a looks at stats w. rtstat. Hash spinning and how many new
entires create and how many warm you hit.
> Maybe there is some contention on the rt_hash_table spinlocks?
> Is the attached patch enough to increase the size?
There is boot option for this now
rhash_entries= [KNL,NET]
Set number of hash buckets for route cache
--ro
next prev parent reply other threads:[~2004-12-07 22:40 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-06 20:53 Karsten Desler
2004-12-06 21:48 ` David S. Miller
2004-12-06 22:41 ` Karsten Desler
2004-12-06 23:53 ` Bernd Eckenfels
2004-12-07 0:20 ` Karsten Desler
2004-12-07 2:46 ` jamal
2004-12-07 2:54 ` Karsten Desler
2004-12-07 3:18 ` jamal
2004-12-07 3:24 ` Karsten Desler
2004-12-07 3:30 ` jamal
2004-12-07 4:02 ` Karsten Desler
2004-12-07 10:21 ` Karsten Desler
2004-12-07 12:34 ` jamal
2004-12-07 13:14 ` Karsten Desler
2004-12-06 23:56 ` Con Kolivas
2004-12-07 0:18 ` Karsten Desler
2004-12-07 10:47 ` P
2004-12-07 11:21 ` Karsten Desler
2004-12-07 12:38 ` Robert Olsson
2004-12-07 12:50 ` Karsten Desler
2004-12-07 13:04 ` jamal
2004-12-07 13:11 ` Karsten Desler
2004-12-07 13:39 ` P
2004-12-07 18:38 ` Karsten Desler
2004-12-08 5:39 ` Willy Tarreau
2004-12-08 13:08 ` Karsten Desler
2004-12-08 13:27 ` jamal
2004-12-07 21:10 ` Karsten Desler
2004-12-07 22:40 ` Robert Olsson [this message]
2004-12-08 22:06 ` Karsten Desler
2004-12-08 4:31 ` jamal
2004-12-08 13:26 ` Karsten Desler
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