From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29530 invoked by alias); 27 Feb 2012 22:20:57 -0000 Received: (qmail 29523 invoked by uid 22791); 27 Feb 2012 22:20:57 -0000 X-SWARE-Spam-Status: No, hits=-6.6 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 27 Feb 2012 22:20:43 +0000 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1RMKgWL011822 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 27 Feb 2012 17:20:42 -0500 Received: from [10.11.231.236] (deploy7.rdu.redhat.com [10.11.231.236]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1RMKgrI011774; Mon, 27 Feb 2012 17:20:42 -0500 Message-ID: <4F4C01BA.2050004@redhat.com> Date: Mon, 27 Feb 2012 22:20:00 -0000 From: William Cohen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 MIME-Version: 1.0 To: Mark Wielaard CC: David Smith , systemtap@sourceware.org Subject: Re: Recent review of SystemTap test results on ARM running Fedora 15 hard float. References: <4F468E22.4010308@redhat.com> <4F46A795.8000307@redhat.com> <4F46B861.5060201@redhat.com> <4F46C3F8.7080900@redhat.com> <4F47B4E4.2080803@redhat.com> <4F47D662.9000509@redhat.com> <4F47E4AF.1010205@redhat.com> <20120225193939.GA32752@toonder.wildebeest.org> <4F4BA237.2050709@redhat.com> <1330359008.2736.60.camel@springer.wildebeest.org> <20120227215420.GB6644@toonder.wildebeest.org> In-Reply-To: <20120227215420.GB6644@toonder.wildebeest.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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: 2012-q1/txt/msg00206.txt.bz2 On 02/27/2012 04:54 PM, Mark Wielaard wrote: > On Mon, Feb 27, 2012 at 05:10:08PM +0100, Mark Wielaard wrote: >> On Mon, 2012-02-27 at 10:33 -0500, William Cohen wrote: >>> Does this this test need the uprobes support for this test to work? >> >> Maybe... I am a little fuzzy on the details of when/how vma tracking is >> triggered. Technically vma tracking doesn't need uprobes. But it might >> be that vma tracking is only enabled/started if uprobes are active. You >> might have to look with -DDEBUG_TASK_FINDER_VMA to see what is >> happening. > > I poked a bit myself on an arm setup. The vma tracker doesn't need > uprobes, but it does need the task finder, and runtime.h says: > > #if (defined(CONFIG_UTRACE) || defined(STAPCONF_UTRACE_VIA_TRACEPOINTS) \ > || defined(STAPCONF_UTRACE_VIA_FTRACE)) > #define HAVE_TASK_FINDER > #endif > > So you do need some form of UTRACE. > Unfortunately my setup doesn't have that. > Does your kernel? > > Cheers, > > Mark Hi Mark, My arm machine kernels don't have the UTRACE supoort either. I have the fedora 15 arm kernel (kernel-tegra-2.6.42.3-2.fc15.armv7hl) and the vanilla git tree kernel, 3.3.0-rc5+, on my machine. -Will