From owner-freebsd-hackers Tue Jan 10 14:41:46 1995 Return-Path: hackers-owner Received: (from root@localhost) by freefall.cdrom.com (8.6.9/8.6.6) id OAA07748 for hackers-outgoing; Tue, 10 Jan 1995 14:41:46 -0800 Received: from halloran-eldar.lcs.mit.edu (halloran-eldar.lcs.mit.edu [18.26.0.159]) by freefall.cdrom.com (8.6.9/8.6.6) with SMTP id OAA07741 for ; Tue, 10 Jan 1995 14:41:45 -0800 Received: by halloran-eldar.lcs.mit.edu; id AA13433; Tue, 10 Jan 1995 17:41:35 -0500 Date: Tue, 10 Jan 1995 17:41:35 -0500 From: Garrett Wollman Message-Id: <9501102241.AA13433@halloran-eldar.lcs.mit.edu> To: Heikki Suonsivu Cc: freebsd-hackers@freefall.cdrom.com Subject: FreeBSD as an IP Router In-Reply-To: <199501102038.AA07702@laphroaig.cs.hut.fi> References: <199501102038.AA07702@laphroaig.cs.hut.fi> Sender: hackers-owner@FreeBSD.org Precedence: bulk < said: > At least on FreeBSD 1.1.5.1 it doesn't seem to be the CPU speed which sets > the limit. For some reason, it can only forward packets at half of the > speed which it can pump out of its interfaces. The speed limit for ISA network interfaces is the ISA bus speed. You are actually CPU limited, but because the CPU has to reach out over the ISA bus to pull data off the interface, it takes much longer than would a memory access to data in system RAM. -GAWollman -- Garrett A. Wollman | Shashish is simple, it's discreet, it's brief. ... wollman@lcs.mit.edu | Shashish is the bonding of hearts in spite of distance. Opinions not those of| It is a bond more powerful than absence. We like people MIT, LCS, ANA, or NSA| who like Shashish. - Claude McKenzie + Florent Vollant