From owner-freebsd-hardware Thu Jan 30 11:23:48 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id LAA26049 for hardware-outgoing; Thu, 30 Jan 1997 11:23:48 -0800 (PST) Received: from pahtoh.cwu.edu (root@pahtoh.cwu.edu [198.104.65.27]) by freefall.freebsd.org (8.8.5/8.8.5) with SMTP id LAA26044 for ; Thu, 30 Jan 1997 11:23:46 -0800 (PST) Received: from opus.cts.cwu.edu (skynyrd@opus.cts.cwu.edu [198.104.92.71]) by pahtoh.cwu.edu (8.6.13/8.6.9) with ESMTP id LAA24996 for ; Thu, 30 Jan 1997 11:23:45 -0800 Received: from localhost (skynyrd@localhost) by opus.cts.cwu.edu (8.8.5/8.8.5) with SMTP id LAA20771 for ; Thu, 30 Jan 1997 11:23:44 -0800 (PST) Date: Thu, 30 Jan 1997 11:23:44 -0800 (PST) From: Chris Timmons To: freebsd-hardware@freebsd.org Subject: DE500-AA (w/21140-AC) ~7% slower than -XA Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk The good news is that the most recent DEC DE500 10/100 PCI ethernet adapters plug in and go just fine under -current. The ostensible differences between the 'classic' DE500-XA boards which we have reliably run under FreeBSD for a great while are: The DE500-AA has a 21140-AC chip rather than the -AB on the last -XA adapter we bought. The -AA has an EPROM socket. The -AA seems to be about 7% slower So for example, running an -XA as a 10baseT adapter, I routinely see about ~1M/sec ftp times for a given 40MB file, while when I replace the -AA with an -XA in the same machine and copy the same file (over and over again) I get ~930K/sec. Would anyone care to conjecture if the slowdown is intrinsic to the HW or perhaps something that could be addressed in the driver? -Chris