Return-Path: Received: (qmail 17282 invoked from network); 15 Feb 2004 11:55:05 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 15 Feb 2004 11:55:05 -0000 Received: (qmail 74854 invoked from network); 15 Feb 2004 11:57:04 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 X-Priority: 3 X-MSMail-Priority: Normal Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 15 Feb 2004 11:57:02 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1AsKtS-000JM1-OC for dave@picks.force9.co.uk; Sun, 15 Feb 2004 11:57:02 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1AsKsi-0000aw-NN for rs_out@blacksheep.org; Sun, 15 Feb 2004 11:56:16 +0000 Received: from [165.212.11.112] (helo=cmsrelay03.mx.net) by post.thorcom.com with smtp (Exim 4.14) id 1AsKsd-0000an-0Q for rsgb_lf_group@blacksheep.org; Sun, 15 Feb 2004 11:56:11 +0000 Received: from uadvg130.cms.usa.net (165.212.11.130) by cmsoutbound.mx.net with SMTP; 15 Feb 2004 11:55:39 -0000 Received: from usa.net [151.41.143.235] by uadvg130.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.13N) with ESMTP id 046iBoL4l0493M30; Sun, 15 Feb 2004 11:55:37 GMT X-USANET-Auth: 151.41.143.235 AUTH dibene@usa.net usa.net Message-ID: <402F5E4E.3000308@usa.net> Date: Sun, 15 Feb 2004 12:55:58 +0100 From: "Alberto di Bene" User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <98.36e2ca3.2d60958c@aol.com> In-reply-to: <98.36e2ca3.2d60958c@aol.com> Subject: LF: Re: Timing GPS Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 DL4YHF@aol.com wrote: > Cannot confirm this - on my PC (P4) its exactly two times this frequency, > so do not rely on a 'constant' value. Hi Wolf, thanks for the information. It looks like on the Pentium iV they have changed something. But I am on the safe side, I issue the QueryPerformanceFrequency when my program starts, and use the returned value. One of the golden rules in Computer Science is that constants can be everything, bar constants :-) 73 Alberto I2PHD