From: David Miller <davem@davemloft.net>
To: lm@bitmover.com
Cc: torvalds@linux-foundation.org, herbert@gondor.apana.org.au,
wscott@bitmover.com, netdev@vger.kernel.org
Subject: Re: tcp bw in 2.6
Date: Tue, 02 Oct 2007 14:16:56 -0700 (PDT) [thread overview]
Message-ID: <20071002.141656.42880006.davem@davemloft.net> (raw)
In-Reply-To: <20071002164858.GH17418@bitmover.com>
From: lm@bitmover.com (Larry McVoy)
Date: Tue, 2 Oct 2007 09:48:58 -0700
> Isn't this something so straightforward that you would have tests for it?
> This is the basic FTP server loop, doesn't someone have a big machine with
> 10gig cards and test that sending/recving data doesn't regress?
Nobody is really doing this, or they aren't talking about it.
Sometimes the crash fixes and other work completely consumes us. Add
in travel to conferences and real life, and it's no surprise stuff
like this slips through the cracks.
We absolutely depend upon people like you to report when there are
anomalies like this. It's the only thing that scales.
FWIW I have a t1000 Niagara box and an Ultra45 going through a netgear
gigabit switch. I'm getting 85MB/sec in one direction and 10MB/sec in
the other (using bw_tcp from lmbench3). Both are using identical
broadcom tigon3 gigabit chips and identical current kernels so that is
a truly strange result.
I'll investigate, it may be the same thing you're seeing.
next prev parent reply other threads:[~2007-10-02 21:16 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070929142517.EC6AB5FB21@work.bitmover.com>
[not found] ` <alpine.LFD.0.999.0709290914410.3579@woody.linux-foundation.org>
[not found] ` <20070929172639.GB7037@bitmover.com>
[not found] ` <alpine.LFD.0.999.0709291050200.3579@woody.linux-foundation.org>
2007-10-02 0:59 ` tcp bw in 2.6 Larry McVoy
2007-10-02 2:14 ` Linus Torvalds
2007-10-02 2:20 ` Larry McVoy
2007-10-02 3:50 ` David Miller
2007-10-02 4:23 ` Larry McVoy
2007-10-02 15:06 ` John Heffner
2007-10-02 17:14 ` Rick Jones
2007-10-02 17:20 ` Larry McVoy
2007-10-02 18:01 ` Rick Jones
2007-10-02 18:40 ` Larry McVoy
2007-10-02 19:47 ` Rick Jones
2007-10-02 21:32 ` David Miller
2007-10-03 7:19 ` Bill Fink
2007-10-02 10:52 ` Herbert Xu
2007-10-02 15:09 ` Larry McVoy
2007-10-02 15:41 ` Larry McVoy
2007-10-02 16:25 ` Larry McVoy
2007-10-02 16:47 ` Stephen Hemminger
2007-10-02 16:49 ` Larry McVoy
2007-10-02 17:10 ` Stephen Hemminger
2007-10-15 12:40 ` Daniel Schaffrath
2007-10-15 15:49 ` Stephen Hemminger
2007-10-02 16:34 ` Linus Torvalds
2007-10-02 16:48 ` Larry McVoy
2007-10-02 21:16 ` David Miller [this message]
2007-10-02 21:26 ` Larry McVoy
2007-10-02 21:47 ` David Miller
2007-10-02 22:17 ` Rick Jones
2007-10-02 22:32 ` David Miller
2007-10-02 22:36 ` Larry McVoy
2007-10-02 22:59 ` Rick Jones
2007-10-03 8:02 ` David Miller
2007-10-02 16:48 ` Ben Greear
2007-10-02 17:11 ` Larry McVoy
2007-10-02 17:18 ` Ben Greear
2007-10-02 17:21 ` Larry McVoy
2007-10-02 17:54 ` Stephen Hemminger
2007-10-02 18:35 ` Larry McVoy
2007-10-02 18:29 ` John Heffner
2007-10-02 19:07 ` Larry McVoy
2007-10-02 19:29 ` Linus Torvalds
2007-10-02 20:31 ` David Miller
2007-10-02 19:33 ` Larry McVoy
2007-10-02 19:53 ` John Heffner
2007-10-02 20:14 ` Larry McVoy
2007-10-02 20:40 ` Rick Jones
2007-10-02 20:42 ` Wayne Scott
2007-10-02 21:56 ` Linus Torvalds
2007-10-02 19:27 ` Linus Torvalds
2007-10-02 19:53 ` Rick Jones
2007-10-02 20:33 ` David Miller
2007-10-02 20:44 ` Roland Dreier
2007-10-02 21:21 ` Larry McVoy
2007-10-03 21:13 ` Pekka Pietikainen
2007-10-03 21:23 ` Larry McVoy
2007-10-03 21:50 ` Pekka Pietikainen
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