* Updated information. Apparently this is known issue with *all* Intel NICs. All "e1000" series. Some newer ones do not have this issue.
The issue is related with "write" speed over an Intel network *only* for TCP. UDP is running at wire speed. "Read" from intel NIC is also running at wire speed (114 Mbytes/sec) This is both under opensolaris and linux. Just confirmed that I am getting wire speed with UDP with iperf: iperf -c 192.168.3.1 -u -t 10 -fM -b 1100M ------------------------------------------------------------ Client connecting to 192.168.3.1, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 0.05 MByte (default) ------------------------------------------------------------ [ 3] local 192.168.3.3 port 47351 connected with 192.168.3.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1142 MBytes 114 MBytes/sec [ 3] Sent 814313 datagrams [ 3] Server Report: [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 3] 0.0-10.0 sec 1140 MBytes 114 MBytes/sec 0.011 ms 779/814313 (0.096%) vs. TCP: iperf -c 192.168.3.1 -t 10 -fM -w 1M ------------------------------------------------------------ Client connecting to 192.168.3.1, TCP port 5001 TCP window size: 1.00 MByte ------------------------------------------------------------ [ 3] local 192.168.3.3 port 64873 connected with 192.168.3.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 625 MBytes 62.5 MBytes/sec This has been a known issue for a very long time, and not many care it appears. -- This message posted from opensolaris.org _______________________________________________ networking-discuss mailing list [email protected]
