From owner-freebsd-hackers Tue Aug 7 9:59:45 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from mail.rpi.edu (mail.rpi.edu [128.113.22.40]) by hub.freebsd.org (Postfix) with ESMTP id D55E237B409; Tue, 7 Aug 2001 09:59:39 -0700 (PDT) (envelope-from drosih@rpi.edu) Received: from [128.113.24.47] (gilead.acs.rpi.edu [128.113.24.47]) by mail.rpi.edu (8.11.3/8.11.3) with ESMTP id f77Gxc333362; Tue, 7 Aug 2001 12:59:38 -0400 Mime-Version: 1.0 X-Sender: drosih@mail.rpi.edu Message-Id: In-Reply-To: <200108070739.f777dmi08218@mass.dis.org> References: <200108070739.f777dmi08218@mass.dis.org> Date: Tue, 7 Aug 2001 12:59:36 -0400 To: Mike Smith , tlambert2@mindspring.com From: Garance A Drosihn Subject: Re: Allocate a page at interrupt time Cc: Matt Dillon , freebsd-hackers@FreeBSD.ORG Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG At 12:39 AM -0700 8/7/01, Mike Smith wrote: > > It also has the unfortunate property of locking us into virtual >> wire mode, when in fact Microsoft demonstrated that wiring down >> interrupts to particular CPUs was good practice, in terms of >> assuring best performance. Specifically, running in virtual >> wire mode means that all your CPUs get hit with the interrupt, >> whereas running with the interrupt bound to a particular CPU >> reduces the overall overhead. Even what we have today, with >> the big giant lock and redirecting interrupts to "the CPU in >> the kernel" is better than that... > >Terry, this is *total* garbage. > >Just so you know, ok? There are people on this list besides Terry. Terry has taken the time to refer to a few URL's, and remind us of a benchmark that I (for one) do remember, and I do remember Windows doing quite well on it. Maybe that benchmark was bogus for some reason, but I seem to remember several freebsd developers taking it seriously at the time. So, could you at least fill in what part of the above is total garbage? Throw in a few insults to Terry if it makes you feel better for some reason, but raise the level of information content a little for the rest of us? You quoted several distinct comments of Terry's -- were all of them garbage? It might very well be that all of Terry's comments were in fact garbage, but from the sidelines I'd appreciate a little more in the way of technical details. -- Garance Alistair Drosehn = gad@eclipse.acs.rpi.edu Senior Systems Programmer or gad@freebsd.org Rensselaer Polytechnic Institute or drosih@rpi.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message