From owner-freebsd-alpha Thu Sep 5 18:38:33 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6EF0E37B400; Thu, 5 Sep 2002 18:38:31 -0700 (PDT) Received: from avocet.mail.pas.earthlink.net (avocet.mail.pas.earthlink.net [207.217.120.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1767643E65; Thu, 5 Sep 2002 18:38:31 -0700 (PDT) (envelope-from tlambert2@mindspring.com) Received: from pool0142.cvx22-bradley.dialup.earthlink.net ([209.179.198.142] helo=mindspring.com) by avocet.mail.pas.earthlink.net with esmtp (Exim 3.33 #1) id 17n84i-0005rE-00; Thu, 05 Sep 2002 18:38:21 -0700 Message-ID: <3D7806D1.C87A9A6A@mindspring.com> Date: Thu, 05 Sep 2002 18:37:21 -0700 From: Terry Lambert X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Andrew Gallatin Cc: John Baldwin , freebsd-alpha@FreeBSD.ORG Subject: Re: ithread preemption References: <15735.47204.905352.900631@grasshopper.cs.duke.edu> <15735.47756.501169.199225@grasshopper.cs.duke.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Andrew Gallatin wrote: > John Baldwin writes: > > Solaris doesn't run on alpha, but it also a bit different in its approach. > > I do wonder if there is a way we can violate an assumption in PAL due to > > migration though. That is, a thread could return to PAL on a different > > CPU than the one the interrupt was originally sent to. This might explain > > why only SMP has problems. > > > > Hey ... I think you have it on the nose! That makes the most sense > I've heard yet. > > Do we have any way to bind a thread to a cpu? Alfred has some patches. IMO, threads should not be so bound to a CPU, as a migration event should be an exception, rather than the rule, and always handled by the scheduler. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message