From: Andi Kleen <ak@suse.de>
To: "David S. Miller" <davem@davemloft.net>
Cc: Andi Kleen <ak@suse.de>, anton@samba.org, netdev@oss.sgi.com
Subject: Re: bad TSO performance in 2.6.9-rc2-BK
Date: Wed, 22 Sep 2004 16:00:00 +0200 [thread overview]
Message-ID: <20040922140000.GD27432@wotan.suse.de> (raw)
In-Reply-To: <20040921155835.18aee381.davem@davemloft.net>
On Tue, Sep 21, 2004 at 03:58:35PM -0700, David S. Miller wrote:
> On Mon, 20 Sep 2004 22:30:21 +0200
> Andi Kleen <ak@suse.de> wrote:
>
> > I see the same problem here, but it's even worse. I only get 150-200KB/s
> > sending data with scp from a fast machine with e1000 with a gigabit link.
> > netperf also gives only 250KB/s.
>
> So I re-enabled TSO support in the loopback driver to try and
> reproduce this, but I can't.
>
> There has been a lot of churn in this area so please make sure you
> are using the latest sources, all of my current TSO fixes are in
> Linus's BK tree.
I tried it with rc2bk8 again and the performance is much better (22MB/s)
that what I got earlier with 2.6.8rc2, but still far below what 2.6.5 gets
on the same hardware (68MB/s)
Both tests with netperf over e1000.
> And, take the patch below and do a loopback bandwidth test before
> and after the patch is applied. Do things slow down when loopback
> has TSO enabled just as it does for your gigabit interfaces?
Without TSO ~755MB/s, with TSO ~600-620MB/s (results seem to be a bit
variable).
-Andi
next prev parent reply other threads:[~2004-09-22 14:00 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-20 6:30 bad TSO performance in 2.6.9-rc2-BK Anton Blanchard
2004-09-20 15:54 ` Nivedita Singhvi
2004-09-21 15:55 ` Anton Blanchard
2004-09-20 20:30 ` Andi Kleen
2004-09-21 22:58 ` David S. Miller
2004-09-22 14:00 ` Andi Kleen [this message]
2004-09-22 18:12 ` David S. Miller
2004-09-22 19:55 ` Andi Kleen
2004-09-22 20:07 ` Nivedita Singhvi
2004-09-22 20:30 ` David S. Miller
2004-09-22 20:56 ` Nivedita Singhvi
2004-09-22 21:56 ` Andi Kleen
2004-09-22 22:04 ` David S. Miller
2004-09-22 20:12 ` Andrew Grover
2004-09-22 20:39 ` David S. Miller
2004-09-22 22:06 ` Andi Kleen
2004-09-22 22:25 ` David S. Miller
2004-09-22 22:47 ` Andi Kleen
2004-09-22 22:50 ` David S. Miller
2004-09-23 23:11 ` David S. Miller
2004-09-23 23:41 ` Herbert Xu
2004-09-23 23:41 ` David S. Miller
2004-09-24 0:12 ` Herbert Xu
2004-09-24 0:40 ` Herbert Xu
2004-09-24 1:07 ` Herbert Xu
2004-09-24 1:17 ` David S. Miller
2004-09-27 1:27 ` Herbert Xu
2004-09-27 2:50 ` Herbert Xu
2004-09-27 4:00 ` David S. Miller
2004-09-27 5:45 ` Herbert Xu
2004-09-27 19:01 ` David S. Miller
2004-09-27 21:32 ` Herbert Xu
2004-09-28 21:10 ` David S. Miller
2004-09-28 21:34 ` Andi Kleen
2004-09-28 21:53 ` David S. Miller
2004-09-28 22:33 ` Andi Kleen
2004-09-28 22:57 ` David S. Miller
2004-09-28 23:27 ` Andi Kleen
2004-09-28 23:35 ` David S. Miller
2004-09-28 23:55 ` Andi Kleen
2004-09-29 0:04 ` David S. Miller
2004-09-29 20:58 ` John Heffner
2004-09-29 21:10 ` Nivedita Singhvi
2004-09-29 21:50 ` David S. Miller
2004-09-29 21:56 ` Andi Kleen
2004-09-29 23:29 ` David S. Miller
2004-09-29 23:51 ` John Heffner
2004-09-30 0:03 ` David S. Miller
2004-09-30 0:10 ` Herbert Xu
2004-10-01 0:34 ` David S. Miller
2004-10-01 1:12 ` David S. Miller
2004-10-01 3:40 ` David S. Miller
2004-10-01 10:35 ` Andi Kleen
2004-10-01 10:23 ` Andi Kleen
2004-09-30 0:10 ` John Heffner
2004-09-30 17:25 ` John Heffner
2004-09-30 20:23 ` David S. Miller
2004-09-30 0:05 ` Herbert Xu
2004-09-30 4:33 ` David S. Miller
2004-09-30 5:47 ` Herbert Xu
2004-09-30 7:39 ` David S. Miller
2004-09-30 8:09 ` Herbert Xu
2004-09-30 9:29 ` Andi Kleen
2004-09-30 20:20 ` David S. Miller
2004-09-29 3:27 ` John Heffner
2004-09-29 9:01 ` Andi Kleen
2004-09-29 19:56 ` David S. Miller
2004-09-29 20:56 ` Andi Kleen
2004-09-29 21:17 ` David S. Miller
2004-09-29 21:00 ` David S. Miller
2004-09-29 21:16 ` Nivedita Singhvi
2004-09-29 21:22 ` David S. Miller
2004-09-29 21:43 ` Andi Kleen
2004-09-29 21:51 ` John Heffner
2004-09-29 21:52 ` David S. Miller
2004-09-24 8:30 ` Andi Kleen
2004-09-27 22:38 ` John Heffner
2004-09-27 23:04 ` David S. Miller
2004-09-27 23:25 ` Andi Kleen
2004-09-27 23:37 ` David S. Miller
2004-09-27 23:51 ` Andi Kleen
2004-09-28 0:15 ` David S. Miller
2004-09-27 23:36 ` Herbert Xu
2004-09-28 0:13 ` David S. Miller
2004-09-28 0:34 ` Herbert Xu
2004-09-28 4:59 ` David S. Miller
2004-09-28 5:15 ` Herbert Xu
2004-09-28 5:58 ` David S. Miller
2004-09-28 6:45 ` Nivedita Singhvi
2004-09-28 7:20 ` Nivedita Singhvi
2004-09-28 20:38 ` David S. Miller
2004-09-28 7:23 ` Nivedita Singhvi
2004-09-28 8:23 ` Herbert Xu
2004-09-28 12:53 ` John Heffner
2004-09-22 20:28 ` David S. Miller
[not found] <Pine.NEB.4.33.0409301625560.13549-100000@dexter.psc.edu>
2004-10-02 1:32 ` John Heffner
2004-10-04 20:07 ` David S. Miller
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