Dear List, I have upgraded my test machines to 2.6.31 (released on 9-11-2009) experimental DCCP tree. With CCID2, My problem is - I can not send enough data even though both my test machines are connected to 10Mbit/s LAN. While with CCID3, for the same 2 machines, with exact same configuration, I can transfer data properly without being limited by anything. The following is my iperf output for CCID2: =============================================== [ 4] 0.0- 1.0 sec 31.9 KBytes 261 Kbits/sec [ 4] 1.0- 2.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 2.0- 3.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 3.0- 4.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 4.0- 5.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 5.0- 6.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 6.0- 7.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 7.0- 8.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 8.0- 9.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 9.0-10.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 10.0-11.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 11.0-12.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 12.0-13.0 sec 2.77 KBytes 22.7 Kbits/sec [ 4] 0.0-13.0 sec 65.2 KBytes 41.0 Kbits/sec =============================================== The following is my iperf output for CCID3: =============================================== [ 4] local 203.143.170.102 port 5001 connected with 203.143.170.200 port 56657 [ 4] 0.0- 1.0 sec 11549 KBytes 94606 Kbits/sec [ 4] 1.0- 2.0 sec 11586 KBytes 94913 Kbits/sec [ 4] 2.0- 3.0 sec 11568 KBytes 94765 Kbits/sec [ 4] 3.0- 4.0 sec 11583 KBytes 94890 Kbits/sec [ 4] 4.0- 5.0 sec 11585 KBytes 94901 Kbits/sec [ 4] 5.0- 6.0 sec 11576 KBytes 94833 Kbits/sec [ 4] 6.0- 7.0 sec 11579 KBytes 94856 Kbits/sec [ 4] 7.0- 8.0 sec 11583 KBytes 94890 Kbits/sec [ 4] 8.0- 9.0 sec 11586 KBytes 94913 Kbits/sec [ 4] 9.0-10.0 sec 11564 KBytes 94731 Kbits/sec [ 4] 0.0-10.0 sec 115801 KBytes 94810 Kbits/sec =============================================== I am using the following /proc entries to switch between CCID2 and CCID3: =============================================== sysctl -w net.dccp.default.seq_window=10000 sysctl -w net.dccp.default.rx_ccid=2 sysctl -w net.dccp.default.tx_ccid=2 =============================================== I have double checked this issue with an older kernel (2.6.25-rc8) on the same two machines and I don't get this problem with CCID2. The following is the iperf receiving end output from one of the two 2.6.25-rc8 machines: =============================================== [ 4] 0.0- 1.0 sec 11507 KBytes 94265 Kbits/sec [ 4] 1.0- 2.0 sec 11508 KBytes 94277 Kbits/sec [ 4] 2.0- 3.0 sec 11507 KBytes 94265 Kbits/sec [ 4] 3.0- 4.0 sec 11507 KBytes 94265 Kbits/sec [ 4] 4.0- 5.0 sec 11508 KBytes 94277 Kbits/sec [ 4] 5.0- 6.0 sec 11507 KBytes 94265 Kbits/sec [ 4] 6.0- 7.0 sec 11508 KBytes 94277 Kbits/sec [ 4] 7.0- 8.0 sec 11507 KBytes 94265 Kbits/sec [ 4] 8.0- 9.0 sec 11507 KBytes 94265 Kbits/sec [ 4] 9.0-10.0 sec 11508 KBytes 94277 Kbits/sec [ 4] 0.0-10.0 sec 115132 KBytes 94269 Kbits/sec =============================================== Regards, Golam Sarwar (Babil)-- To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
