I ran iperf as well and got poor results with both 256KB and 16Bytes (2KB).
(desktop-pc) $ iperf -s -w 256K ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 256 KByte (WARNING: requested 256 KByte) ------------------------------------------------------------ [ 4] local 192.168.50.223 port 5001 connected with 192.168.50.107 port 39723 (panda) # iperf -c 192.168.50.223 -w 256K -t 10 ------------------------------------------------------------ Client connecting to 192.168.50.223, TCP port 5001 TCP window size: 256 KByte (WARNING: requested 256 KByte) ------------------------------------------------------------ [ 3] local 192.168.50.107 port 39723 connected with 192.168.50.223 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-13.3 sec 200 KBytes 123 Kbits/sec (desktop-pc) $ iperf -s -w 16 WARNING: TCP window size set to 16 bytes. A small window size will give poor performance. See the Iperf documentation. ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 2.23 KByte (WARNING: requested 16.0 Byte) ------------------------------------------------------------ [ 4] local 192.168.50.223 port 5001 connected with 192.168.50.107 port 39724 [ ID] Interval Transfer Bandwidth [ 4] 0.0-18.3 sec 144 KBytes 64.5 Kbits/sec (panda) # iperf -c 192.168.50.223 -w 16 -t 10 WARNING: TCP window size set to 16 bytes. A small window size will give poor performance. See the Iperf documentation. ------------------------------------------------------------ Client connecting to 192.168.50.223, TCP port 5001 TCP window size: 2.00 KByte (WARNING: requested 16.0 Byte) ------------------------------------------------------------ [ 3] local 192.168.50.107 port 39724 connected with 192.168.50.223 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-18.3 sec 144 KBytes 64.5 Kbits/sec -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/709245 Title: ARM SMP scheduler performance bug To manage notifications about this bug go to: https://bugs.launchpad.net/linaro-ubuntu/+bug/709245/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
