Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753318AbbG0R1u (ORCPT ); Mon, 27 Jul 2015 13:27:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57374 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750858AbbG0R1t (ORCPT ); Mon, 27 Jul 2015 13:27:49 -0400 Date: Mon, 27 Jul 2015 19:27:45 +0200 From: Jiri Olsa To: "Liang, Kan" Cc: "a.p.zijlstra@chello.nl" , "acme@kernel.org" , "luto@kernel.org" , "mingo@redhat.com" , "eranian@google.com" , "ak@linux.intel.com" , "mark.rutland@arm.com" , "Hunter, Adrian" , "jolsa@kernel.org" , "namhyung@kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH V2 5/6] perf,tools: caculate and save freq/CPU%/CORE_BUSY% in he_stat Message-ID: <20150727172745.GC20509@krava.brq.redhat.com> References: <1437745712-16649-1-git-send-email-kan.liang@intel.com> <1437745712-16649-6-git-send-email-kan.liang@intel.com> <20150726163113.GB24646@krava.brq.redhat.com> <37D7C6CF3E00A74B8858931C1DB2F077018CCDE5@SHSMSX103.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <37D7C6CF3E00A74B8858931C1DB2F077018CCDE5@SHSMSX103.ccr.corp.intel.com> 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 Content-Length: 1674 Lines: 44 On Mon, Jul 27, 2015 at 05:19:23PM +0000, Liang, Kan wrote: > > > > > -481,6 +486,32 @@ iter_add_next_nop_entry(struct hist_entry_iter > > *iter > > > __maybe_unused, } > > > > > > static int > > > +iter_add_single_freq_perf_entry(struct hist_entry_iter *iter, struct > > > +addr_location *al) { > > > + struct perf_evsel *evsel = iter->evsel; > > > + struct perf_sample *sample = iter->sample; > > > + struct hist_entry *he; > > > + struct freq_perf_info info = {0}; > > > + u64 *data = sample->freq_perf_data; > > > + > > > + if (data[FREQ_PERF_REF_CYCLES] > 0) > > > + info.freq = (data[FREQ_PERF_CYCLES] * cpu_max_freq) / > > data[FREQ_PERF_REF_CYCLES]; > > > + if (data[FREQ_PERF_TSC] > 0) > > > + info.cpu_u = (100 * data[FREQ_PERF_REF_CYCLES]) / > > data[FREQ_PERF_TSC]; > > > + if (data[FREQ_PERF_MPERF] > 0) > > > + info.core_busy = (100 * data[FREQ_PERF_APERF]) / > > > +data[FREQ_PERF_MPERF]; > > > > seems to me the new iterator is too big gun for this, why not initialize > > 'struct freq_perf_info' in iter_prepare_normal_entry ? > > > > Yes, we can initialize it in normal process. > But we only need the freq_perf_info when "--show-freq-perf" is set. > For most of the cases, it wastes time to calculate the unused information > for each sample. That could impact the performance for processing. hum, it could fill in freq_perf_info only when --show-freq-perf is set, other time it'd pass NULL jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/