Hallo, After I installed the OFED (1.4 beta), I noticed a drop in TCP performance via Infiniband: from 10 GBit/s to less than 8 GBit/s. Is that "expected behaviour"? Is there a way to avoid this performance loss?
The HCA used in both test machines is a Mellanox Infinihost III Lx DDR HCA. Both machines run OpenSuse 11 with a 2.6.25.16 Kernel. Performance with Open Suse 11 "out of the box", using Open Suse 11 Infiniband packages: tamara iperf-2.0.4/src> ./iperf -c 192.168.2.2 -l 3M ------------------------------------------------------------ Client connecting to 192.168.2.2, TCP port 5001 TCP window size: 515 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.2.1 port 47730 connected with 192.168.2.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 11.6 GBytes 10.0 Gbits/sec Performance after the Installation of ODED 1.4. beta: tamara iperf-2.0.4/src> ./iperf -c 192.168.2.2 -l 3M ------------------------------------------------------------ Client connecting to 192.168.2.2, TCP port 5001 TCP window size: 902 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.2.1 port 38864 connected with 192.168.2.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 8.43 GBytes 7.24 Gbits/sec Thanks in advance, Jan -- Jan Ruffing Software Developer Motama GmbH Lortzingstraße 10 · 66111 Saarbrücken · Germany tel +49 681 940 85 50 · fax +49 681 940 85 49 [email protected] · www.motama.com Companies register · district council Saarbrücken · HRB 15249 CEOs · Dr.-Ing. Marco Lohse, Michael Repplinger This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
