* Sending rate decrease in TCP bidirectional test
@ 2014-02-20 16:57 Varun Sharma
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From: Varun Sharma @ 2014-02-20 16:57 UTC (permalink / raw)
To: kernelnewbies
Hi,
I am using iperf v 2.0.5 for testing 10G card. Its a dual port card. Two 16
core machines with 64GB RAM are connected back to back.
In *TCP Bidirectional test* case sending throughput decrease as compare to *TCP
Unidirectional test* case sending .
All cases use default setting . No extra parameter is set.
In case of 4 Client threads Output comes :--
Unidirectional Send Process --- *9.6* Gbps
Bidirectional Send Process ---- *4.9* Gbps
In case of 8 Client threads Output comes :--
Unidirectional Send Process --- *9.7* Gbps
Bidirectional Send Process -- *6.4* Gbps
In case of 16 Client threads Output comes :--
Unidirectional Send Process ---* 9.7* Gbps
Bidirectional Send Process -- *8* Gbps
Is this problem regarding TCP/IP stack or nic card ?
Regards
varun
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