Quote:
Originally Posted by Ignitionnet
Why would window size affect a TCP ping?
Yep.
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not sure, it was just a theory.
When I used to run windows XP which had no tcp auto tuning, smaller tcp packets were noticebly slower to process with large tcp buffers configured as tcp can be tuned for one type of use but it then become suboptimal for another type of use hence the use of auto tuning in modern operating systems.
Delayed acks will slow down single small tcp packets, the most public example been WoW where gamers were disabling delayed acks in windows to halve their tcp latency in the game, large tcp windows I assumed can have an affect as well but its only a theory I havent done any testing on it.
To test my theory on windows vista or 7 one could disable auto tuning which will force a tcp buffer of 64k, this isnt huge but is bigger than what auto tuning should use for small single packets, on wireless interfaces the default buffer is much smaller than 64k. On XP one could set a high buffer size manually eg. 256k, check the ping on speedtest.net then try again with a 4k buffer size and see if it noticebly drops. If it doesnt I am wrong
