Date: Fri, 28 Dec 2001 17:36:22 -0500 (EST) From: Mike Silbersack <silby@silby.com> To: Tomas Svensson <tsn@gbdev.net> Cc: Josef Karthauser <joe@tao.org.uk>, <freebsd-hackers@FreeBSD.ORG> Subject: Re: FreeBSD performing worse than Linux? Message-ID: <Pine.BSF.4.30.0112281734020.92969-100000@niwun.pair.com> In-Reply-To: <20011228192736.A22545@simba.systemteknik.net>
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On Fri, 28 Dec 2001, Tomas Svensson wrote: > This just verifies what I said weeks ago. > > On the client side: > > ## several packets are lost here due to congestion, thanks to > TCP_NODELAY: > ## server resends 641:1057 after a timer expired, 1 second seems long? > > 15:28:19.288745 transwarp.telnet > genius.kpop: P 641:1057(416) ack 64 win 33304 > > Conclusion: This is a OpenSSH problem, not a FreeBSD problem. > > -Tomas I'd have to agree. I just recompiled libssh / sshd so that NODELAY would not be set in any case, and ls acts a lot more nicely over a modem link. (2 large updates, rather than lots of tiny ones.) I'm not sure that we're seeing any actual bug in the tcp stack here as much as the effect of packet loss and tinygrams. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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