AnsweredAssumed Answered

p2020 tcp throughput

Question asked by Park man Chan on Nov 16, 2014
Latest reply on Nov 19, 2014 by Yiping Wang

Hi folks,

  What would be the expected TCP throughput on a P2020?


  I'm getting a Rx/Tx bandwidth of around 850Mbits/s when testing Rx/Tx separately, but when testing  Rx/Tx at the same time, the Rx throughput drops to less than 300Mbits/s, with Tx at around 800Mbits/s. What could be the problem here? Is this limited by the CPU?


Details of the test setup.

   PC1  -> P2020 eth0 -> PC2


   P2020 running Linux 2.6.35, TCP bandwidth testing with iperf 2.0.5


1. Rx bandwidth

    on the P2020

          iperf -s


          iperf -c P2020_ip


2. Tx bandwidth

    on the P2020

          iperf -c PC2_ip


          iperf -s


3. Runs 1 and 2 at the same time for testing Rx/Tx at the same time.