From mboxrd@z Thu Jan 1 00:00:00 1970 From: Francis Moreau Subject: perf-probe: issue with latest fedora kernel Date: Thu, 09 Dec 2010 16:00:08 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:63492 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754444Ab0LIPAO (ORCPT ); Thu, 9 Dec 2010 10:00:14 -0500 Received: by wwa36 with SMTP id 36so2554724wwa.1 for ; Thu, 09 Dec 2010 07:00:13 -0800 (PST) Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org Hello, I'm trying to use perf-probe(1) with the latest F14 kernel (2.6.35.9-64.fc14.x86_64). I also installed kernel-debug-debuginfo-2.6.35.9-64.fc14.x86_64 which contains the running vmlinux image AFAICT. I added it to the buildid cache: $ perf buildid-cache -v -a /usr/lib/debug/lib/modules/2.6.35.9-64.fc14.x86_64.debug/vmlinux Adding 4d89e23415d8ab491cfc8ef8aa67764b91cc6787 /usr/lib/debug/lib/modules/2.6.35.9-64.fc14.x86_64.debug/vmlinux: OK But when running perf-probe(1) like the following: $ perf probe schedule cpu Failed to find path of kernel moduleFailed to open debuginfo file. Error: Failed to add events. (-2) it fails. One strange thing is that when perf read the running kernel build id, it get: 882b1b53eb1d65320e8fa710273aa8493896c4. Could anybody tell me what I'm doing wrong ? Thanks -- Francis