From owner-freebsd-arch Wed May 17 13:26:59 2000 Delivered-To: freebsd-arch@freebsd.org Received: from anchor-post-34.mail.demon.net (anchor-post-34.mail.demon.net [194.217.242.92]) by hub.freebsd.org (Postfix) with ESMTP id 518EB37BD0C for ; Wed, 17 May 2000 13:26:51 -0700 (PDT) (envelope-from dfr@nlsystems.com) Received: from nlsys.demon.co.uk ([158.152.125.33] helo=herring.nlsystems.com) by anchor-post-34.mail.demon.net with esmtp (Exim 2.12 #1) id 12sAP0-0003Ub-0Y; Wed, 17 May 2000 21:26:47 +0100 Received: from salmon.nlsystems.com (salmon.nlsystems.com [10.0.0.3]) by herring.nlsystems.com (8.9.3/8.8.8) with ESMTP id VAA26572; Wed, 17 May 2000 21:31:40 +0100 (BST) (envelope-from dfr@nlsystems.com) Date: Wed, 17 May 2000 21:31:00 +0100 (BST) From: Doug Rabson To: Terry Lambert Cc: arch@FreeBSD.ORG Subject: Re: A new api for asynchronous task execution In-Reply-To: <200005171727.KAA06011@usr05.primenet.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 17 May 2000, Terry Lambert wrote: > > I'm planning to add a new system to the kernel which should make it much > > easier for drivers (especially loadable drivers) to use software > > interrupts to implement split-level interrupt handlers. The api was > > inspired by the Linux tqueue system but the implementation is quite > > different. > > I would suggest that there is probably a lot to be learned from > the NT split interrupt handling model, if the relative performance > of NT and Solartis vs. BSD 4.4 based operating systems and Linux > is any indicator. I'm not very familiar with the NT model but I seem to remember that the upper level is basically a kernel thread. The taskqueue system I am proposing would support that directly. With small changes, I think it could easily load balance between several worker threads. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 20 8442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message