From owner-freebsd-hackers Sun Jun 25 14:14:00 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id OAA07709 for hackers-outgoing; Sun, 25 Jun 1995 14:14:00 -0700 Received: from blob.best.net (blob.best.net [204.156.128.88]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id OAA07703 for ; Sun, 25 Jun 1995 14:13:55 -0700 Received: from shell1.best.com (shell1.best.com [204.156.128.10]) by blob.best.net (8.6.12/8.6.5) with ESMTP id OAA02124 for ; Sun, 25 Jun 1995 14:12:47 -0700 Received: from geli.clusternet (rcarter.vip.best.com [204.156.137.2]) by shell1.best.com (8.6.12/8.6.5) with ESMTP id OAA13838 for ; Sun, 25 Jun 1995 14:12:29 -0700 Received: (from rcarter@localhost) by geli.clusternet (8.6.11/8.6.9) id OAA01741 for hackers@freebsd.org; Sun, 25 Jun 1995 14:11:53 -0700 Date: Sun, 25 Jun 1995 14:11:53 -0700 From: "Russell L. Carter" Message-Id: <199506252111.OAA01741@geli.clusternet> To: hackers@freebsd.org Subject: Re: FreeBSD as a router Sender: hackers-owner@freebsd.org Precedence: bulk |> R. Grimes writes..... |> |> >The SMC 9332 EtherPower 10/100 is a bus master device with no memory |> >on it at all. It uses host memory for packet buffers and for all |> >practical purposes this can be as much memory as you want to through |> >at it! |> > |> As long as you can get the bus. You don't want this on a 100mbs media |> device. The card (or controller) needs some buffering or you'll be in |> trouble with a heavy burst. | |I don't think that a 10MByte a second memory demand is going to have |much of a problem at all on a 132MB/sec (theroy) or 100MByte/sec (measured) |bus like PCI. Well, that 100 MBytes/sec was mem to mem, right? Not going through the bus to a device. For that the best I've ever heard of with the current generation PCI chipsets is 18 MBytes/sec. If anybody knows of device<->mem faster than 18 MBytes/sec I would appreciate a pointer to it. Russell