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Apart from the usual suspects that is :

ethtool -S tc -s -d qdisc netstat

I don't see anything that is reflecting drops in any of these counters,but i see TCP re-transmits happening in a back-back connecting when i have 16 iperf connections between DUT and the peer

Any other places i can look at for finding out where drops are happening ?

Thanks Som

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What kind of connection do you have between the peers? Is your network stack doing retransmits because some ACKs are delayed?

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It's a back-back ,so no chance of network congestion et al... do i verify that? – user56407 Oct 8 '10 at 7:29
This is the command that i am using – user56407 Oct 8 '10 at 8:44
iperf -c <peer ip> -l60000 -i5 -t60000 -P16 -w2048k – user56407 Oct 8 '10 at 8:44

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