Rick,<br>Thanks a lot for the reply. I will try to download the netperf 4 and run the test again.<br>Thanks<br><br><b><i>Rick Jones <rick.jones2@hp.com></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> anil mishra wrote:<br>> Rick,<br>> I did following:<br>> for i in 1 2 3 4<br>> do<br>> netperf -t TCP_STREAM -H 192.168.x.x -p 99 -c -C<br>> netperf -t TCP_RR -H 192.168.x.x<br>> for j in 1<br>> do<br>> netperf -t TCP_STREAM -H 192.168.x.x -c -C<br>> netperf -t TCP_MAERTS -H 192.168.x.x -c -C<br>> done<br>> done<br><br>Since there are no '&' at the ends of the netperf command lines, the <br>shell will run them one at a time rather than run them in parallel in <br>the background.<br><br>Further, one should _not_ trust this concurrent session method with only <br>one iteration of each test and such a short run time. The potential for <br>startup/shutdown
skew error is too great.<br><br>Per the online docs :) one should use the confidence intervals mechanism <br>to get netperf to run more than one iteration for each invokation. So, <br>adding a -i 10 or -i 30 to each netperf command line would be indicated. <br> Might not be a bad idea to increase the individual run times also with <br>say -l 30. A combination of -l 30 and -i 30 means the run will go for <br>30*30 = 900 seconds ie 15 minutes.<br><br>Any particular reason you are sending the first TCP_STREAM test to a <br>different control port number with -p?<br><br>Unless you like parsing jumbled-up output, you might also want to use -P <br>0 to turn-off the test banners. If you want identification of <br>individual results, the 2.4.3 (not sure if 2.4.2 has it) version has the <br>-B option to add the passed-in text to the brief output, on the same <br>line so it sticks with the rest of it.<br><br>Of course, the better place to be running concurrent tests is netperf4,
<br>even if the interface is still a bit unwieldy. Netperf4 has support for <br>avoiding skew errors entirely.<br><br>happy benchmarking,<br><br>rick jones<br></blockquote><br><p> 
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