Date: Fri, 21 Sep 2001 17:28:03 +0900 From: Tsuchiya Yoshihiro <tsuchiya@flab.fujitsu.co.jp> To: Mike Silbersack <silby@silby.com> Cc: net@FreeBSD.org Subject: Re: TCP performance question Message-ID: <3BAAFA13.8040708@flab.fujitsu.co.jp> References: <20010921025715.U68923-100000@achilles.silby.com>
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Mike Silbersack wrote: >On Fri, 21 Sep 2001 tsuchiya@flab.fujitsu.co.jp wrote: > >>and we changed the size from 1 to 10000 byte and measured the time of >>read/write pair on the server. Usually the measured time is >>around or less than 1 msec, however it is always 100msec when the size is >>between 2049 and 2919 byte or between 4381 and 5839 byte or >>between 7301 and 8751 byte. 100 times slower. >> > >Try disabling delayed ACKs and see how that affects your results. The >default delay for delayed acks is 100ms. > >sysctl -w net.inet.tcp.delayed_ack=0 > I found a machine with FreeBSD4.3 and tried it, but it didn't work. Yoshi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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