From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from zcars04e.nortelnetworks.com (zcars04e.nortelnetworks.com [47.129.242.56]) by ozlabs.org (Postfix) with ESMTP id 239E72BC0F for ; Tue, 19 Oct 2004 06:58:16 +1000 (EST) Received: from zcard303.ca.nortel.com (zcard303.ca.nortel.com [47.129.242.59]) by zcars04e.nortelnetworks.com (Switch-2.2.6/Switch-2.2.0) with ESMTP id i9IKwBZ00907 for ; Mon, 18 Oct 2004 16:58:12 -0400 (EDT) Message-ID: <41742E62.6060603@nortelnetworks.com> Date: Mon, 18 Oct 2004 14:58:10 -0600 From: Chris Friesen MIME-Version: 1.0 To: linuxppc-dev@ozlabs.org Content-Type: text/plain; charset=us-ascii; format=flowed Subject: tbr/decrementer and SMP -- do the cpus stay in sync? List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I thought I remembered some discussion on this a while back, but I can't find it in my archived messages or online, so here goes. With SMP PowerPC machines (specifically the dual G5) we sync up the timebase when we bring up the second CPU. Are we guaranteed that they stay in sync after that point, or will they drift? If they drift, do we have any idea how much? Thanks, Chris