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Fri, 17 Apr 2020 14:54:04 -0700 (PDT) From: Arnaldo Carvalho de Melo X-Google-Original-From: Arnaldo Carvalho de Melo Received: by quaco.ghostprotocols.net (Postfix, from userid 1000) id BCAFA409A3; Fri, 17 Apr 2020 18:54:02 -0300 (-03) Date: Fri, 17 Apr 2020 18:54:02 -0300 To: "Liang, Kan" Cc: Arnaldo Carvalho de Melo , jolsa@redhat.com, peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org, namhyung@kernel.org, adrian.hunter@intel.com, mathieu.poirier@linaro.org, ravi.bangoria@linux.ibm.com, alexey.budankov@linux.intel.com, vitaly.slobodskoy@intel.com, pavel.gerasimov@intel.com, mpe@ellerman.id.au, eranian@google.com, ak@linux.intel.com Subject: Re: [PATCH V4 00/17] Stitch LBR call stack (Perf Tools) Message-ID: <20200417215402.GC21512@kernel.org> References: <20200319202517.23423-1-kan.liang@linux.intel.com> <20200417174803.GA21512@kernel.org> <2b34783b-85d1-6d30-d9e1-f550f8b6e9c0@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2b34783b-85d1-6d30-d9e1-f550f8b6e9c0@linux.intel.com> X-Url: http://acmel.wordpress.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Fri, Apr 17, 2020 at 05:47:49PM -0400, Liang, Kan escreveu: > > > On 4/17/2020 1:48 PM, Arnaldo Carvalho de Melo wrote: > > Em Thu, Mar 19, 2020 at 01:25:00PM -0700, kan.liang@linux.intel.com escreveu: > > > For a simple test case tchain_edit with 43 depth of call stacks. > > > perf record --call-graph lbr -- ./tchain_edit > > > perf report --stitch-lbr > > > Without --stitch-lbr, perf report only display 32 depth of call stacks. > > > With --stitch-lbr, perf report can display all 43 depth of call stacks. > > > The depth of call stacks increase 34.3%. > > > Correspondingly, the processing time of perf report increases 39%, > > > Without --stitch-lbr: 11.0 sec > > > With --stitch-lbr: 15.3 sec > > Next time provide the full test proggie, I had to expand those ... to > > reproduce your results, > Sure, I will do so in the future. > > all I have is in perf/core, some patches are > > still to be processed, will continue later, have to stop now, see: > > https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/commit/?id=13cfba6b741ff > > For my testing, looks really great! > Thanks for the testing. :) My pleasure. BTW everything is in there by now. - Arnaldo