From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Larmour To: overseers@sources.redhat.com Subject: [Fwd: failure notice] Date: Mon, 23 Apr 2001 11:46:00 -0000 Message-id: <3AE47883.6414FBFA@redhat.com> X-SW-Source: 2001-q2/msg00138.html I've been getting a fair number of bounces recently with this problem. Any ideas why? As far as I know, there's nothing special about this mail as opposed to any of the many others I send to the eCos list. Jifl -- Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062 Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine To : jlarmour at redhat dot com Subject : failure notice >From : MAILER-DAEMON at sourceware dot cygnus dot com Date : 23 Apr 2001 00:29:30 -0000 Hi. This is the qmail-send program at sourceware.cygnus.com. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. : ezmlm-send: fatal: message already has a Mailing-List header (maybe I should be a sublist) (#5.7.2) --- Below this line is a copy of the message. Return-Path: Received: (qmail 14965 invoked from network); 23 Apr 2001 00:29:28 -0000 Received: from unknown (HELO china.com) (202.106.182.13) by sourceware.cygnus.com with SMTP; 23 Apr 2001 00:29:28 -0000 Received: from china.com([10.1.0.100]) by china.com(AIMC 2.9.5.1) with SMTP id jm93ae37d8d; Mon, 23 Apr 2001 08:26:10 +0800 Received: from sourceware.cygnus.com([205.180.83.71]) by china.com(AIMC 2.9.5.1) with SMTP id jm2213ae2e765; Sun, 22 Apr 2001 17:23:43 +0800 Received: (qmail 23587 invoked by alias); 20 Apr 2001 09:23:28 -0000 Mailing-List: contact ecos-discuss-help@sourceware.cygnus.com; run by ezmlm Precedence: bulk List-Unsubscribe: < mailto:ecos-discuss-unsubscribe-zhongtao=china.com@sources.redhat.com > List-Subscribe: < mailto:ecos-discuss-subscribe@sources.redhat.com > List-Archive: < http://sources.redhat.com/ml/ecos-discuss/ > List-Post: < mailto:ecos-discuss@sources.redhat.com > List-Help: < mailto:ecos-discuss-help@sources.redhat.com >, < http://sources.redhat.com/ml/#faqs > Sender: ecos-discuss-owner@sources.redhat.com Delivered-To: mailing list ecos-discuss@sources.redhat.com Received: (qmail 23534 invoked from network); 20 Apr 2001 09:23:25 -0000 Received: from unknown (HELO executor.cambridge.redhat.com) (195.224.55.237) by sourceware.cygnus.com with SMTP; 20 Apr 2001 09:23:25 -0000 Received: from redhat.com (murgh.cambridge.redhat.com [172.16.18.70]) by executor.cambridge.redhat.com (Postfix) with ESMTP id D65A9ABAF7; Fri, 20 Apr 2001 10:23:21 +0100 (BST) Message-ID: <3AE00009.2BC3F600@redhat.com> Date: Fri, 20 Apr 2001 10:23:21 +0100 From: Jonathan Larmour Organization: Red Hat UK Ltd. X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.2.17-14enterprise i686) X-Accept-Language: en MIME-Version: 1.0 To: Andrea Acquaviva Cc: "ecos-discuss@sources.redhat.com" References: <3ADFFA65.CC964CFF@deis.unibo.it> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: Re: [ECOS]thread switch frequency X-Auto-Forward: zhongtao@china.com zhongtao@mail.sc.cninfo.net Andrea Acquaviva wrote: > > Hi, > I have a question about eCos mlqueue scheduler. > If there are two threads (making a matrix multiplication), running with > the same priority, they switch with a frequency given by: > > f_clock/CYGNUM_KERNEL_SCHED_TIMESLICE_TICKS, > > where f_clock in the case of strongarm1110 (assabet) is 3.6864MHz. > > Is this correct or is there something else that affects the switching > frequency? The timer that drives the kernel clock interrupt is at 3.6864MHz yes, but it is has been programmed to only actually interrupt when its counter reaches 36864, which corresponds to every 10ms. And only 1 in CYGNUM_KERNEL_SCHED_TIMESLICE_TICKS of those causes a timeslice. Jifl -- Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062 Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine