Date: Thu, 27 Mar 2003 16:24:16 -0800 (PST) From: Doug Ambrisko <ambrisko@ambrisko.com> To: Sam Leffler <sam@errno.com> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/conf options src/sys/netinet ip_output.c Message-ID: <200303280024.h2S0OGsl054428@www.ambrisko.com> In-Reply-To: <03d001c2f4b2$ecf461b0$52557f42@errno.com>
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Sam Leffler writes: | As I've said already, in the drivers you want to use the minimum-cost | technique to get the packet on the wire. I think your original | single-cluster version is close to what I would do, but so long as this | stuff only happens as an exception to the normal processing path I really | don't care. Just keep stats so we can see how much it's happening. An example of this happening is doing a cvs pserver update. I was seeing around a max of 10 frags being sent down to the driver on the server side of the connection. I saw a bunch of 8 frags. I watched it by putting a printf in the frag. handling part of the driver to count them. This seems to happen if you have an app. the does a bunch of small writes to a socket. Doing a dd if=/dev/null ibs=1 | rsh <machine> "> /dev/null" showed it as well if I recall right. Doug A.
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