From owner-freebsd-hackers Mon May 20 11:44:29 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id LAA07627 for hackers-outgoing; Mon, 20 May 1996 11:44:29 -0700 (PDT) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id LAA07622 for ; Mon, 20 May 1996 11:44:27 -0700 (PDT) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id LAA28134; Mon, 20 May 1996 11:38:04 -0700 From: Terry Lambert Message-Id: <199605201838.LAA28134@phaeton.artisoft.com> Subject: Re: Funky Micron PP200 problems under 2.1 To: hasty@rah.star-gate.com (Amancio Hasty Jr.) Date: Mon, 20 May 1996 11:38:04 -0700 (MST) Cc: michaelv@HeadCandy.com, henrich@crh.cl.msu.edu, freebsd-hackers@FreeBSD.ORG In-Reply-To: <199605180632.XAA01529@rah.star-gate.com> from "Amancio Hasty Jr." at May 17, 96 11:32:13 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > > PCI is supposed to be capable of up to 133MB/s (~33MHz * 32-bits). > > Cough.... It has been known for a while now that the PCI chipset > on the PPro has had it shares of problems and one of them being > if memory does not fail me that writes to the PCI bus are limited > to 5MB/sec. 123MB/s is burst rate. If you kept that up continuously, you'd miss your DRAM refresh and your computer would lose it's mind. Max sustained rate is closer to 80MB/s -- enough for 6 100Mbit network cards. 8-). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.