From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Wed, 06 Jun 2007 19:59:43 +0100 (BST) Received: from wf1.mips-uk.com ([194.74.144.154]:38567 "EHLO dl5rb.ham-radio-op.net") by ftp.linux-mips.org with ESMTP id S20027104AbXFFS7l (ORCPT ); Wed, 6 Jun 2007 19:59:41 +0100 Received: from denk.linux-mips.net (denk.linux-mips.net [127.0.0.1]) by dl5rb.ham-radio-op.net (8.14.1/8.13.8) with ESMTP id l56Isoqm010756 for ; Wed, 6 Jun 2007 19:54:50 +0100 Received: (from ralf@localhost) by denk.linux-mips.net (8.14.1/8.14.1/Submit) id l56Iso9m010755 for linux-mips@linux-mips.org; Wed, 6 Jun 2007 19:54:50 +0100 Date: Wed, 6 Jun 2007 19:54:50 +0100 From: Ralf Baechle To: linux-mips@linux-mips.org Subject: Tickless/dyntick kernel, highres timer and general time crapectomy Message-ID: <20070606185450.GA10511@linux-mips.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.14 (2007-02-12) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 15309 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ralf@linux-mips.org Precedence: bulk X-list: linux-mips Time to send bring this to a larger audience. I'm working on getting dyntick and highres timer support working for MIPS. This unavoidably implies dumping most of the MIPS-private time infrastructure we've piled up over the past decade. Which really is a major crapectomy. A first cut of the patches which are tested to run well on uniprocessor and VSMP Malta kernels is at: ftp://ftp.linux-mips.org/pub/linux/mips/people/ralf/dyntick-quilt It will also likely work on various other simple systems. A more recent version of these patches which I haven't yet gotten around to test on silicon is available at: ftp://ftp.linux-mips.org/pub/linux/mips/people/ralf/linux-time.patches The patchset is both large and intrusive. One of the things that are still missing is support for additional clocksources and clockevent_devices. Particularly Alchemy (and any other system supporting clock scaling) will need some work there since the cp0 count/compare timer are not useful on such systems. Help with those would be greatly appreciated. Ralf