Date: Sun, 5 Dec 1999 13:37:58 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: obrien@NUXI.com, freebsd-alpha@FreeBSD.ORG Subject: Re: 64bitPCI Message-ID: <Pine.BSF.4.10.9912051337180.28920-100000@beppo.feral.com> In-Reply-To: <14410.53049.351748.935865@grasshopper.cs.duke.edu>
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> > > > Network IO requirements. Which of the FreeBSD supported alphas have a > > > > 64bit PCI bus ? > > > > > > Yes. You want something based on the tsunami chipset found in the > > > > My PC164SX has two 64-bit PCI slots. How good is the 64-bit > > implementation on this board? > > > > Not so good. It has the pyxis chipset & doesn't have good memory > bandwidth. (as to "good" I'm talking better than 300MB/sec for the > xp1000 and better than 500MB/sec for the ds20 using the Hbench > bw_mem_cp: $Id: bw_mem_cp.c,v 1.7 1997/06/27 00:33:58 abrown Exp $) > I'm not sure what the 164sx's memory bandwidth is, but I suspect that > it is < 120MB/sec for the hbench copy test. I haven't benchmarked it myself, but I'm told the rawhide is rated to a gigabyte/second across the backplane. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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