Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 10 Apr 2001 03:13:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 10 Apr 2001 03:13:27 -0400 Received: from rrzd1.rz.uni-regensburg.de ([132.199.1.6]:54797 "EHLO rrzd1.rz.uni-regensburg.de") by vger.kernel.org with ESMTP id ; Tue, 10 Apr 2001 03:13:16 -0400 From: "Ulrich Windl" Organization: Universitaet Regensburg, Klinikum To: linux-kernel@vger.kernel.org Date: Tue, 10 Apr 2001 09:12:57 +0200 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Subject: Re: announce: PPSkit patch for Linux 2.4.2 (pre6) Message-ID: <3AD2CE98.28151.46E93A@localhost> In-Reply-To: In-Reply-To: <3AC83FF1.27420.398B86@localhost> X-mailer: Pegasus Mail for Win32 (v3.12c) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, Cycle Counters, Linux currently tries to synchronize TSCs for consistent time in SMP systems. One would not believe what combinations of hardware are tried, especially for precision timing. Here's a short answer to my asking- back about a complaint (the kernel is reporting negative time warps). As any problem, it can be solved with some overhead, but should it be done? Replies to me too, as I'm not subscribed, please. Ulrich On 9 Apr 2001, at 18:39, Andreas Bussjaeger wrote: > > from the current CPU. All these values seem highly suspect. However a > > few more values would be helpful to diagnose the situation. > > I have to tell you that I have one 533 MHz Celeron and one 433 MHz > Celeron. > > > indicate that the CPUs are 968ms apart (each CPU half from the average). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/