16 millisecond quantization when sending/receivingtcp packets

Posted by MKZ on Stack Overflow See other posts from Stack Overflow or by MKZ
Published on 2010-05-22T07:44:23Z Indexed on 2010/05/22 7:50 UTC
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tcp

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latency

Hi,

I have a C++ application running on windows xp 32 system sending and receiving short tcp/ip packets.

Measuring (accurately) the arrival time I see a quantization of the arrival time to 16 millisecond time units. (Meaning all packets arriving are at (16 )xN milliseconds separated from each other)

To avoid packet aggregation I tried to disable the NAGLE algorithm by setting the IPPROTO_TCP option to TCP_NODELAY in the socket variables but it did not help

I suspect that the problem is related to the windows schedular which also have a 16 millisecond clock.. Any idea of a solution to this problem ? Thanks

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