From: Roland Dreier <rdreier@cisco.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: mlleinin@hpcn.ca.sandia.gov, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, openib-general@openib.org,
shemminger@osdl.org
Subject: Re: [openib-general] Re: TSO and IPoIB performance degradation
Date: Tue, 07 Mar 2006 17:34:34 -0800 [thread overview]
Message-ID: <ada4q29ra6t.fsf@cisco.com> (raw)
In-Reply-To: <20060307.172336.107863253.davem@davemloft.net> (David S. Miller's message of "Tue, 07 Mar 2006 17:23:36 -0800 (PST)")
David> I wish you had started the thread by mentioning this
David> specific patch, we wasted an enormous amount of precious
David> developer time speculating and asking for arbitrary tests
David> to be run in order to narrow down the problem, yet you knew
David> the specific change that introduced the performance
David> regression already...
Sorry, you're right. I was a little confused because I had a memory of
Michael's original email (http://lkml.org/lkml/2006/3/6/150) quoting a
changelog entry, but looking back at the message, it was quoting
something completely different and misleading.
I think the most interesting email in the old thread is
http://openib.org/pipermail/openib-general/2005-October/012482.html
which shows that reverting 314324121 (the "stretch ACK performance
killer" fix) gives ~400 Mbit/sec in extra IPoIB performance.
- R.
next prev parent reply other threads:[~2006-03-08 1:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <OF336D72E6.999D2A30-ON8725712A.00117C92-8825712A.00116629@us.ibm.com>
2006-03-07 21:44 ` [openib-general] Re: TSO and IPoIB performance degradation Matt Leininger
2006-03-07 21:49 ` Stephen Hemminger
2006-03-07 21:53 ` Michael S. Tsirkin
2006-03-08 0:11 ` Matt Leininger
2006-03-08 0:18 ` David S. Miller
2006-03-08 1:17 ` Roland Dreier
2006-03-08 1:23 ` David S. Miller
2006-03-08 1:34 ` Roland Dreier [this message]
2006-03-08 12:53 ` Michael S. Tsirkin
2006-03-08 20:53 ` David S. Miller
2006-03-09 23:48 ` David S. Miller
2006-03-10 0:10 ` Michael S. Tsirkin
2006-03-10 0:38 ` Michael S. Tsirkin
2006-03-10 7:18 ` David S. Miller
2006-03-10 0:21 ` Rick Jones
2006-03-10 7:23 ` David S. Miller
2006-03-10 17:44 ` Rick Jones
2006-03-20 9:06 ` Michael S. Tsirkin
2006-03-20 9:55 ` David S. Miller
2006-03-20 10:22 ` Michael S. Tsirkin
2006-03-20 10:37 ` David S. Miller
2006-03-20 11:27 ` Michael S. Tsirkin
2006-03-20 11:47 ` Arjan van de Ven
2006-03-20 11:49 ` Lennert Buytenhek
2006-03-20 11:53 ` Arjan van de Ven
2006-03-20 13:35 ` Michael S. Tsirkin
2006-03-20 12:04 ` Michael S. Tsirkin
2006-03-20 15:09 ` Benjamin LaHaise
2006-03-20 18:58 ` Rick Jones
2006-03-20 23:00 ` David S. Miller
2006-04-27 4:13 ` Troy Benjegerdes
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