Date: Fri, 22 Oct 1999 01:54:15 -0700 From: Mike Smith <mike@smith.net.au> To: "Ronald G. Minnich" <rminnich@lanl.gov> Cc: hackers@freebsd.org Subject: Re: profile of tcp Message-ID: <199910220854.BAA00435@dingo.cdrom.com> In-Reply-To: Your message of "Thu, 21 Oct 1999 14:54:06 MDT." <Pine.SGI.4.10.9910211451470.269517-100000@acl.lanl.gov>
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> I'm wondering if anyone in this group has done or knows of a good profile > of a tcp send going from user mode to bits on the wire. Reason I'm asking > is the old "put TCP/IP on the NIC" is once again rearing its head, and I'm > hoping there are numbers I can point to (ones that aren't old, that is) > about why this may not be the best idea in the world. FreeBSD seems a good > choice since it has a pretty reasonable implementation. I'd start with "the NIC will require insane amounts of memory to deal with links with large bandwidth/delay products". And when people tell you that the NIC can just use system memory, you should slap them around the head. The thought of a piece of hardware screwing with the kernel memory allocator gives me the creeps. 8) -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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