From mboxrd@z Thu Jan 1 00:00:00 1970 From: Milian Wolff Subject: Re: LBR unwinding for user defined dynamic trace point Date: Wed, 16 Sep 2015 11:55:22 +0200 Message-ID: <3862406.HVDrYIDCMl@milian-kdab2> References: <2495974.rH49Pff4SO@milian-kdab2> <874mivkcg2.fsf@tassilo.jf.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from mail.kdab.com ([176.9.126.58]:43150 "EHLO mail.kdab.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753811AbbIPJzZ (ORCPT ); Wed, 16 Sep 2015 05:55:25 -0400 In-Reply-To: <874mivkcg2.fsf@tassilo.jf.intel.com> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Andi Kleen Cc: 5A@linux.intel.com, linux-perf-users@vger.kernel.org On Tuesday, September 15, 2015 7:02:37 AM CEST Andi Kleen wrote: > Milian Wolff writes: > > When I do the same with the Dwarf unwinder, it works just fine. Using the > > LBR unwinder with a performance counter like instructions also works > > fine. Does anyone know what the issue is here? > > LBR is only supported for PMU sampling at this point. OK, thanks. Can you give me some more information on why that is? Is it fundamentally not possible, or simply not yet implemented? Thanks -- Milian Wolff | milian.wolff@kdab.com | Software Engineer KDAB (Deutschland) GmbH&Co KG, a KDAB Group company Tel: +49-30-521325470 KDAB - The Qt Experts