Tests with iperf and netperf for unicast and multicast destinations show an improvement in the ability of user applications to xmit packets.
Examples: Number of successful writes as reported by 30 seconds UDP_STREAM of 100 byte packets. Tested with netperf on Dual CPU (64bit Intel Xeon 3GHz) running linux-2.6.20-rc1 (sender) and OFED-1.1 (receiver) Note that the results below show improvement only for TX so we see an end to end packet loss. Improving the receiver (NAPI) will reduce the packet loss. ---------------------------------------------------------------------- Without the patch PPS=230507 linux:~ # netperf -H 192.168.11.234 -t UDP_STREAM -l 30 -- -m 100 UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.234 (192.168.11.234) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 262144 100 30.00 6915225 0 184.40 135168 30.00 6366068 169.75 ---------------------------------------------------------------------- tx_signal_rate=1 PPS=244116 linux:~ # netperf -H 192.168.11.234 -t UDP_STREAM -l 30 -- -m 100 UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.234 (192.168.11.234) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 262144 100 30.00 7323482 0 195.27 135168 30.00 6905764 184.13 ---------------------------------------------------------------------- tx_signal_rate=4 PPS=254748 linux:~ # netperf -H 192.168.11.234 -t UDP_STREAM -l 30 -- -m 100 UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.234 (192.168.11.234) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 262144 100 30.00 7642461 0 203.77 135168 30.00 6741080 179.74 ---------------------------------------------------------------------- tx_signal_rate=8 PPS=278458 linux:~ # netperf -H 192.168.11.234 -t UDP_STREAM -l 30 -- -m 100 UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.234 (192.168.11.234) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 262144 100 30.01 8353760 0 222.73 135168 30.01 6884056 183.54 ---------------------------------------------------------------------- tx_signal_rate=16 PPS=316418 linux:~ # netperf -H 192.168.11.234 -t UDP_STREAM -l 30 -- -m 100 UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.234 (192.168.11.234) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 262144 100 30.00 9492551 0 253.11 135168 30.00 6501771 173.37 ---------------------------------------------------------------------- tx_signal_rate=32 PPS=328316 linux:~ # netperf -H 192.168.11.234 -t UDP_STREAM -l 30 -- -m 100 UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.234 (192.168.11.234) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 262144 100 30.00 9849480 0 262.62 135168 30.00 6006394 160.15 ---------------------------------------------------------------------- _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
