[ofa-general] ipoib performanec at smaller mtu

[Boris Shpolyansky]

I think for small MTU sizes you will see better performance with IPoIB
in datagram mode.

Boris Shpolyansky
Sr. Member of Technical Staff, Applications
 
Mellanox Technologies Inc.
350 Oakmead Parkway, Suite 100
Sunnyvale, CA 94085
Tel.: (408) 916 0014
Fax: (408) 585 0314
Cell: (408) 834 9365
www.mellanox.com

-----Original Message-----
From: general-bounces at lists.openfabrics.org
[mailto:general-bounces at lists.openfabrics.org] On Behalf Of Benjamin M.
McClelland
Sent: Monday, March 09, 2009 4:19 PM
To: general at lists.openfabrics.org
Subject: [ofa-general] ipoib performanec at smaller mtu

I was curious what other people are seeing for 1500 mtu performance on
ipoib.  Current tests are showing that I get about 150-175MB/s no matter
how many streams.  If I go up to higher mtu, then performance
significantly increases.  Due to the storage network that this ib is
routing to, we are currently limited to 1500 mtu.

ofed 1.4.1, connected mode, dual opteron dual core 1.8GHz, Mellanox
Technologies MT25418 [ConnectX IB DDR, PCIe 2.0 2.5GT/s] (rev a0) fw
2.6.000, voltaire sm on switch

lro disabled, send_queue_size=256

thanks,
-Ben
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