Disable Nagle for testing (TCP_NODELAY), allow to change message size for socket tests #23
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…stead of hard-coded defaults (1 byte and 32K)
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Hi!
Current qperf always uses hard-coded message sizes for tests.
Notably, 1 byte for tcp_lat and 32K for tcp_bw.
Testing latency with 1 byte messages is a bit... incorrect.
It's also incorrect without setting TCP_NODELAY.
This PR fixes both problems.