From owner-freebsd-hackers Sun Jun 21 19:11:46 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id TAA20299 for freebsd-hackers-outgoing; Sun, 21 Jun 1998 19:11:46 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from bandicoot.prth.tensor.pgs.com (bandicoot.prth.tensor.pgs.com [157.147.224.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id TAA20274 for ; Sun, 21 Jun 1998 19:11:30 -0700 (PDT) (envelope-from shocking@ariadne.prth.tensor.pgs.com) Received: from ariadne.tensor.pgs.com (ariadne [157.147.227.36]) by bandicoot.prth.tensor.pgs.com (8.8.8/8.8.8) with SMTP id KAA14945 for ; Mon, 22 Jun 1998 10:10:43 +0800 (WST) Received: from ariadne by ariadne.tensor.pgs.com (SMI-8.6/SMI-SVR4) id KAA14210; Mon, 22 Jun 1998 10:10:57 +0800 Message-Id: <199806220210.KAA14210@ariadne.tensor.pgs.com> X-Mailer: exmh version 2.0.2 2/24/98 To: freebsd-hackers@FreeBSD.ORG Subject: Re: LSMTP and Unix (fwd) In-reply-to: Your message of "Sun, 21 Jun 1998 16:06:47 MST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 22 Jun 1998 10:10:57 +0800 From: Stephen Hocking-Senior Programmer PGS Tensor Perth Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > Why is this benchmark so slow on UNIX filesystems? > > Will they give out the source to the benchmark so that someone can test > FreeBSD's performance and/or figure out if the benchmark is valid? > Curious - I think the giveaway is in the part of the quote where they state they VMS was engineered to be able to handle lots of async I/Os. It's quite possible that the code they're using relies on this. So if your thread implementation isn't up to scratch (and this is one area where NT shines, see the part of the quote about scheduling et cetera) you could lose out big time. Various benchmarks have been released that show NT can schedule huge numbers of threads very efficiently. On the other hand, its process scheduling is pretty sad. My feeling is that the filesystem issues may not be a big deal, unless you filesystem code isn't multi-threaded. Stephen To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message