From owner-freebsd-alpha@FreeBSD.ORG Sat Apr 5 11:43:10 2003 Return-Path: Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DBB6037B401; Sat, 5 Apr 2003 11:43:10 -0800 (PST) Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by mx1.FreeBSD.org (Postfix) with ESMTP id 223C043FB1; Sat, 5 Apr 2003 11:43:10 -0800 (PST) (envelope-from gallatin@cs.duke.edu) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.12.9/8.12.9) with ESMTP id h35Jh9MS028840 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Sat, 5 Apr 2003 14:43:09 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.6/8.9.1) id h35Jh4Y38599; Sat, 5 Apr 2003 14:43:04 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16015.12744.366625.974350@grasshopper.cs.duke.edu> Date: Sat, 5 Apr 2003 14:43:04 -0500 (EST) To: Fred Clift In-Reply-To: <20030402090802.Y82002-400000@vespa.dmz.orem.verio.net> References: <20030401134113.GC1750@elvis.mu.org> <20030402090802.Y82002-400000@vespa.dmz.orem.verio.net> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid cc: alpha@freebsd.org Subject: Re: call for testers: busdma-ified fxp(4) driver X-BeenThere: freebsd-alpha@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Porting FreeBSD to the Alpha List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 05 Apr 2003 19:43:11 -0000 Fred Clift writes: > > before: throughput in 10^6 bits/sec 39.18 > after: throughput in 10^6 bits/sec 94.11 > (dc): throughput in 10^6 bits/sec 70.97 > > > Honestly I'm suprised there is so much difference between the before and > after and I'm doubting my testing methodology -- perhaps I had the duplex My guess is that the old kernel has WITNESS enabled and the new kernel does not. Even a 600MHz 21264 is maxed out at 75Mb/sec with WITNESS enabled. 50% idle without. Drew