From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from zcars04f.nortelnetworks.com (zcars04f.nortelnetworks.com [47.129.242.57]) by ozlabs.org (Postfix) with ESMTP id 5C7AA2BDB8 for ; Wed, 13 Oct 2004 01:51:11 +1000 (EST) Message-ID: <416BFD66.2090303@nortelnetworks.com> Date: Tue, 12 Oct 2004 09:51:02 -0600 From: Chris Friesen MIME-Version: 1.0 To: jonathan@jonmasters.org References: <416709B8.8080107@vision.caltech.edu> <4A39EEF2-1B6B-11D9-AE5A-000A95A4DC02@kernel.crashing.org> <416B67DE.3050909@nortelnetworks.com> <35fb2e59041012073325afbcfc@mail.gmail.com> In-Reply-To: <35fb2e59041012073325afbcfc@mail.gmail.com> Content-Type: text/plain; charset=us-ascii; format=flowed Cc: linuxppc-dev@ozlabs.org, Arrigo Benedetti Subject: Re: Update frequency of Time Base reg? List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Jon Masters wrote: > so e.g. in /proc/device-tree/cpus/PowerPC,G4/timebase-frequency. Interesting. Learn something new.... Just took a look at the code, and there are apparently some machines on which this is flaky. To use this in userspace you'd want to account for that, and probably you'd want a backup calibration as well. Chris