Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261273AbVE2Hm1 (ORCPT ); Sun, 29 May 2005 03:42:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261272AbVE2Hm1 (ORCPT ); Sun, 29 May 2005 03:42:27 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:16536 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S261273AbVE2HmW (ORCPT ); Sun, 29 May 2005 03:42:22 -0400 Subject: Re: The values of gettimeofday() jumps. From: Arjan van de Ven To: Liangchen Zheng Cc: linux-kernel@vger.kernel.org In-Reply-To: <000201c563ee$eed993d0$85a4c380@dream.eng.uci.edu> References: <000201c563ee$eed993d0$85a4c380@dream.eng.uci.edu> Content-Type: text/plain Date: Sun, 29 May 2005 09:42:18 +0200 Message-Id: <1117352538.6278.0.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 (2.0.4-4) Content-Transfer-Encoding: 7bit X-Spam-Score: 3.7 (+++) X-Spam-Report: SpamAssassin version 2.63 on pentafluge.infradead.org summary: Content analysis details: (3.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 671 Lines: 16 On Sat, 2005-05-28 at 18:37 -0700, Liangchen Zheng wrote: > Hello, > We have several SMP machines (Tyan Tiger MPX motherboard, 2 > AthlonMP 1900+ CPU, linux-2.4.21-20.EL). When running some time > sensitive programs, I observed that the values of gettimeofday () jumped > sometimes on a couple of machines (other machines are fine), from > several hundreds milliseconds to a couple of seconds. try "notsc" as boot option - 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/