From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752762AbaHLNvI (ORCPT ); Tue, 12 Aug 2014 09:51:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:2672 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751737AbaHLNvG (ORCPT ); Tue, 12 Aug 2014 09:51:06 -0400 Date: Tue, 12 Aug 2014 15:50:17 +0200 From: Jiri Olsa To: Andi Kleen Cc: linux-kernel@vger.kernel.org, namhyung@kernel.org, acme@kernel.org, mingo@kernel.org, peterz@infradead.org Subject: Re: Implement lbr-as-callgraph v9 Message-ID: <20140812135017.GB13247@krava.brq.redhat.com> References: <1406827029-7991-1-git-send-email-andi@firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1406827029-7991-1-git-send-email-andi@firstfloor.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 31, 2014 at 10:17:00AM -0700, Andi Kleen wrote: SNIP > v5: > - Rename functions > - Fix gtk build problem > - Fix crash without -g > - Improve error messages > - Improve srcline display in various ways > v6: > - Port to latest perf/core > v7: > - Really port to latest perf/core > v8: > - Rebased on 3.16-rc1 > v9: > - Forward ported to latest tip/perf/core > > Example output: > > % perf record -b -g ./tsrc/tcall Why do we need the '-g' in here.. '-b' should be enough right? I saw u fill the rest of the backtrace with callchain data (if needed), but thats not necessary right? > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.044 MB perf.data (~1923 samples) ] > % perf report --branch-history When I captured data like you above and run pure 'perf report' I did not get callchains displayed at all. Also using 'perf report --branch-history' enables filename:line suffix for callchain regardless of using '-b' for data capture jirka