Date: Mon, 01 Jul 2002 18:05:55 -0400 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Doug Barton <DougB@FreeBSD.ORG>, freebsd-hackers@FreeBSD.ORG, net@FreeBSD.ORG Subject: Re: ftp and mail much slower into fbsd 4.4 vs and old BSDi Message-ID: <200207012205.g61M5t0L008698@whizzo.transsys.com> In-Reply-To: Your message of "Mon, 01 Jul 2002 22:58:07 %2B0200." <55379.1025557087@critter.freebsd.dk> References: <55379.1025557087@critter.freebsd.dk>
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>
> Yes, I can attest to this an I belive it is actually the case on both
> -current and -releng4 that disabling newreno improves TCP performance.
>
> I belive running an X11 application or scp(1) over a wavelan is a very
> good test-bed for this issue.
>
> --
> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
I find this patch also improves performance of SSH on most network
media. Why so many applications go to the trouble to disable
Nagle's algorithm is beyond me. I suspect the socket option has
too seductive of a name.
louie
Index: packet.c
===================================================================
RCS file: /a/cvs/src/crypto/openssh/packet.c,v
retrieving revision 1.1.1.1.2.4
diff -u -r1.1.1.1.2.4 packet.c
--- packet.c 28 Sep 2001 01:33:34 -0000 1.1.1.1.2.4
+++ packet.c 2 Apr 2002 18:26:41 -0000
@@ -1281,9 +1281,11 @@
error("setsockopt IPTOS_LOWDELAY: %.100s",
strerror(errno));
}
+#if 0
if (setsockopt(connection_in, IPPROTO_TCP, TCP_NODELAY, (void *) &on,
sizeof(on)) < 0)
error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
+#endif
} else if (packet_connection_is_ipv4()) {
/*
* Set IP options for a non-interactive connection. Use
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