TCP stream performance regression due toc377411f2494a931ff7facdbb3a6839b1266bcf6

[Alex,Shi]

In our netperf testing, TCP_STREAM56 shows about 20% or more performance
regression on WSM/NHM and tigerton machines. The testing boot up both
netserver and client on localhost. The testing command like this:
./snapshot_script_net TC_STREAM56 127.0.0.1 

We found the following commit causes this issue.
c377411f2494a931ff7facdbb3a6839b1266bcf6  
Revert this commit will recover this regression on all machine. 

Regards!
Alex 

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