Hi,
We run netperf comands as below on client to test throughput performance of our
adpater on server.
client# cat tx.scr
./netperf -H archimedes -l 60 -P 0 -- -m 32K -M 32K -s 128K -S 128K &
./netperf -H archimedes -l 60 -P 0 -- -m 32K -M 32K -s 128K -S 128K &
./netperf -H archimedes -l 60 -P 0 -- -m 32K -M 32K -s 128K -S 128K &
./netperf -H archimedes -l 60 -P 0 -- -m 32K -M 32K -s 128K -S 128K &
On server side, we run netstat during the test and find server sends huge
amouot of TCP ACK packets back to client, much more than Intel's card. The
ratio of incoming packets to output packets is almost 2:1 while 8:1 for Intel
card. Probably, this is part of reason why its throughput is low.
We used netstat to test if there is any dropped packets, but we did not find
any on both sides. Can someone tell us why there are such huge amount of ACK
packets? We enabled flow control on both sides.
Tom
server# netstat -I qlge0 1
input qlge0 output input (Total) output
packets errs packets errs colls packets errs packets errs colls
16353021 0 13773595 0 0 16363586 0 13773916 0 0
133118 0 34453 0 0 133122 0 34453 0 0
131743 0 36877 0 0 131747 0 36877 0 0
130357 0 36779 0 0 130359 0 36779 0 0
131407 0 37578 0 0 131411 0 37578 0 0
133288 0 36852 0 0 133291 0 36852 0 0
129682 0 38080 0 0 129684 0 38080 0 0
128773 0 39178 0 0 128777 0 39178 0 0
127900 0 39053 0 0 127903 0 39053 0 0
127110 0 42227 0 0 127112 0 42227 0 0
125177 0 42709 0 0 125178 0 42709 0 0
122504 0 45314 0 0 122512 0 45314 0 0
121921 0 45741 0 0 121929 0 45741 0 0
128296 0 41202 0 0 128302 0 41202 0 0
123246 0 44473 0 0 123250 0 44473 0 0
111255 0 51020 0 0 111261 0 51020 0 0
109422 0 54272 0 0 109426 0 54272 0 0
111799 0 54356 0 0 111801 0 54356 0 0
118996 0 49735 0 0 118999 0 49735 0 0
103823 0 57340 0 0 103827 0 57340 0 0
121711 0 48975 0 0 121714 0 48975 0 0
117229 0 50826 0 0 117233 0 50826 0 0
106556 0 57143 0 0 106564 0 57143 0 0
105715 0 56761 0 0 105717 0 56761 0 0
121075 0 46456 0 0 121079 0 46456 0 0
117514 0 48480 0 0 117519 0 48480 0 0
117919 0 50006 0 0 117920 0 50006 0 0
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