Hi Lad, Thanks for your reply anyway.
Do you know who's maintainer for dm365 emac part? I want to see if I can get anything from him. Thanks Ben 在 2013年4月24日星期三，Prabhakar Lad 写道： > Ccing Dlos and Mugunthan > > Hi Ben, > > On Tue, Apr 23, 2013 at 4:31 PM, Ben Wang <benfoun...@gmail.com<javascript:;>> > wrote: > > Hi Lad, > > > > I am a engineer working on dm365. Currently I am using linux kernel > > 2.6.37. But I found the network performance is not as good as the one > > on kernel 2.6.18. > > > > Here is the test results I got. > > > > With kernel 2.6.18 > > # ./iperf -c 192.168.1.70 -w 32768 -d -t 60 > > ------------------------------------------------------------ > > Server listening on TCP port 5001 > > TCP window size: 64.0 KByte (WARNING: requested 32.0 KByte) > > ------------------------------------------------------------ > > ------------------------------------------------------------ > > Client connecting to 192.168.1.70, TCP port 5001 > > TCP window size: 64.0 KByte (WARNING: requested 32.0 KByte) > > ------------------------------------------------------------ > > [ 5] local 192.168.1.99 port 4578 connected with 192.168.1.70 port 5001 > > [ 4] local 192.168.1.99 port 5001 connected with 192.168.1.70 port 4509 > > [ ID] Interval Transfer Bandwidth > > [ 5] 0.0-60.0 sec 325 MBytes 45.4 Mbitsc > > [ 4] 0.0-59.9 sec 353 MBytes 49.4 Mbitsc > > > > > > With kernel 2.6.37 > > ./iperf -c 192.168.1.70 -w 32768 -d -t 60 > > ------------------------------------------------------------ > > Server listening on TCP port 5001 > > TCP window size: 64.0 KByte (WARNING: requested 32.0 KByte) > > ------------------------------------------------------------ > > ------------------------------------------------------------ > > Client connecting to 192.168.1.70, TCP port 5001 > > TCP window size: 64.0 KByte (WARNING: requested 32.0 KByte) > > ------------------------------------------------------------ > > [ 3] local 192.168.1.77 port 55370 connected with 192.168.1.70 port 5001 > > [ 5] local 192.168.1.77 port 5001 connected with 192.168.1.70 port 4624 > > [ ID] Interval Transfer Bandwidth > > [ 3] 0.0-60.0 sec 248 MBytes 34.6 Mbitsc > > [ 5] 0.0-60.0 sec 127 MBytes 17.7 Mbitsc > > > > I compared the source code of 2.6.37 with 2.6.32. The driver for dm365 > > emac part changed dramatically. I suspect the somewhere make the > > performance drop. > > > > So can you take a look at it? Our project is blocked on this performance > issue. > > > > I would have loved to help you but unfortunately I am not a > network driver expert I am good at multimedia only. > > Regards, > --Prabhakar > > > Thanks a lot, > > Ben >
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