From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12263 invoked by alias); 20 Nov 2014 07:54:09 -0000 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 Received: (qmail 12230 invoked by uid 48); 20 Nov 2014 07:54:05 -0000 From: "peter at peca dot dk" To: systemtap@sourceware.org Subject: [Bug uprobes/17623] Sometimes probes fail to fire events when running against a multi-threaded application Date: Thu, 20 Nov 2014 07:54:00 -0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: systemtap X-Bugzilla-Component: uprobes X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: peter at peca dot dk X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: systemtap at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-q4/txt/msg00167.txt.bz2 https://sourceware.org/bugzilla/show_bug.cgi?id=17623 --- Comment #4 from Peter Allin --- Aha. When I let perf start the test program, like this: perf stat -e probe_testprog:func1 -e probe_testprog:func2 -a timeout 1s ./testprog The counts are equal (+/- 1 of course). This make the SystemTap problem and the perf problem look like the same. Pointing towards the kernel I suppose? -- You are receiving this mail because: You are the assignee for the bug.