From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26448 invoked by alias); 19 Sep 2007 17:19:53 -0000 Received: (qmail 26441 invoked by uid 22791); 19 Sep 2007 17:19:53 -0000 X-Spam-Status: No, hits=-2.1 required=5.0 tests=AWL,BAYES_00,DK_POLICY_SIGNSOME X-Spam-Check-By: sourceware.org Received: from mga01.intel.com (HELO mga01.intel.com) (192.55.52.88) by sourceware.org (qpsmtpd/0.31) with ESMTP; Wed, 19 Sep 2007 17:19:44 +0000 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 19 Sep 2007 10:19:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.20,274,1186383600"; d="scan'208";a="313996747" Received: from fmsmsx334.amr.corp.intel.com ([132.233.42.1]) by fmsmga001.fm.intel.com with ESMTP; 19 Sep 2007 10:19:43 -0700 Received: from scsmsx411.amr.corp.intel.com ([10.3.90.30]) by fmsmsx334.amr.corp.intel.com with Microsoft SMTPSVC(6.0.3790.1830); Wed, 19 Sep 2007 10:19:42 -0700 Received: from scsmsx415.amr.corp.intel.com ([10.3.90.34]) by scsmsx411.amr.corp.intel.com with Microsoft SMTPSVC(6.0.3790.1830); Wed, 19 Sep 2007 10:19:42 -0700 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: RE: Measuring system call times, elapsed and cpu Date: Wed, 19 Sep 2007 21:06:00 -0000 Message-ID: <16D5B9AB904B0B46B22A27002EE3A8C8EACEA2@scsmsx415.amr.corp.intel.com> In-Reply-To: <46F13F20.8070500@us.ibm.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Measuring system call times, elapsed and cpu Thread-Index: Acf60TV1fbdWeYugSCezZoq9/NZHFgAD19oQ References: <46F05029.7040705@us.ibm.com> <16D5B9AB904B0B46B22A27002EE3A8C8EACABF@scsmsx415.amr.corp.intel.com> <46F13F20.8070500@us.ibm.com> From: "Stone, Joshua I" To: "Mike Mason" Cc: X-OriginalArrivalTime: 19 Sep 2007 17:19:42.0964 (UTC) FILETIME=[44A5A340:01C7FAE1] X-IsSubscribed: yes Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2007-q3/txt/msg00648.txt.bz2 Mike Mason wrote: > Now that I think about it some more, utime and stime aren't fine > grained enough. They're only updated every timer tick. Is there > some other way to measure real cpu time between function entry and > exit? CFS offers better precision through task_utime() and task_stime(), but those don't appear to be exported. Josh