Sockperf CPU usage is high

[heke...@gmail.com]

Hi-

Does any one try to ask a question about sockperf's CPU usage before? I am running sockperf in ping-pong mode (10 messages per seconds, message size is 12Bytes) and find that sockperf takes 95% of a single core. 

I know that might be caused by the high-resolution timestamp that sockperf try to achieve. However, I am wondering whether we can reduce the CPU usage somehow (for example, in my case, microsecond level timestamps are enough)

Thanks!

[Alex Rosenbaum]

sockperf is design to do high resolution packet pacing sends for very accurate tests reproduction or traffic pattern simulations, for that we needed to implement the 'sleep' logic as a busy loop over RDTSC clock reads.

Any sleep/wait/blocking on the OS system calls is in milli-sec resolution and very not accurate for our tests. We require micro-sec waits and high accuracy.

Alex