From: Rick Jones <rick.jones2@hp.com>
To: Bryan Lawver <lawver1@llnl.gov>
Cc: Linux Network Development list <netdev@vger.kernel.org>,
"Michael S. Tsirkin" <mst@dev.mellanox.co.il>,
general@lists.openfabrics.org
Subject: Re: [ofa-general] Re: IPoIB forwarding
Date: Fri, 27 Apr 2007 16:37:49 -0700 [thread overview]
Message-ID: <4632894D.40705@hp.com> (raw)
In-Reply-To: <6.1.2.0.2.20070427153952.13fc7d08@mail.llnl.gov>
Bryan Lawver wrote:
> I had so much debugging turned on that it was not the "slowing of the
> traffic" but the "non-coelescencing" that was the remedy. The NIC is a
> MyriCom NIC and these are easy options to set.
As chance would have it, I've played with some Myricom myri10ge NICs recently,
and even disabled large receive offload during some netperf tests :) It is a
modprobe option. Going back now to the driver source and the README I see :-)
<excerpt>
Troubleshooting
===============
Large Receive Offload (LRO) is enabled by default. This will
interfere with forwarding TCP traffic. If you plan to forward TCP
traffic (using the host with the Myri10GE NIC as a router or bridge),
you must disable LRO. To disable LRO, load the myri10ge driver
with myri10ge_lro set to 0:
# modprobe myri10ge myri10ge_lro=0
Alternatively, you can disable LRO at runtime by disabling
receive checksum offloading via ethtool:
# ethtool -K eth2 rx off
</excerpt>
rick jones
next prev parent reply other threads:[~2007-04-27 23:37 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6.1.2.0.2.20070423160212.12db6400@mail.llnl.gov>
[not found] ` <20070425124652.GG1624@mellanox.co.il>
[not found] ` <6.1.2.0.2.20070426083410.1389d9e0@mail.llnl.gov>
[not found] ` <20070426161409.GF15540@mellanox.co.il>
[not found] ` <6.1.2.0.2.20070426095112.138e9a68@mail.llnl.gov>
[not found] ` <20070426180618.GJ15540@mellanox.co.il>
[not found] ` <6.1.2.0.2.20070427115435.13ea5ec0@mail.llnl.gov>
2007-04-27 20:32 ` [ofa-general] Re: IPoIB forwarding Rick Jones
2007-04-27 22:26 ` Bryan Lawver
2007-04-27 22:32 ` Rick Jones
2007-04-27 22:43 ` Bryan Lawver
2007-04-27 23:37 ` Rick Jones [this message]
2007-04-27 23:39 ` David Miller
2007-04-27 23:48 ` Rick Jones
2007-04-27 23:52 ` David Miller
2007-04-30 17:16 ` Rick Jones
2007-05-01 22:43 ` [PATCH] make myri10ge use default MTU of 1500 bytes Loic Prylli
2007-04-28 6:51 ` [ofa-general] Re: IPoIB forwarding Bill Fink
2007-04-29 19:40 ` Loic Prylli
2007-04-30 21:12 ` Rick Jones
2007-05-01 22:05 ` Loic Prylli
2007-05-01 22:12 ` Rick Jones
2007-05-03 23:37 ` Bryan Lawver
2007-04-30 17:07 ` Rick Jones
2007-05-01 5:57 ` Bill Fink
2007-05-01 16:26 ` Loic Prylli
2007-04-28 2:35 ` parks
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