From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCA93C04AB4 for ; Fri, 17 May 2019 19:36:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A75C821783 for ; Fri, 17 May 2019 19:36:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558121795; bh=0FF4YAV2w/hGdXi0RPmMnEM2sfLMauRluAhW+jsvYBM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HOukBNA9NfJXptJn5TukrKLWhNdLE7tOiOmRk5zrr6Xb/QXsBL7lMxZXZsnF5A6dR UdzAPPEufmkvTsvRoiZxqwXiNjOqSpmRJvhqAzfxuV3PTr/GoPEqX/NkmVVdAeHFkd hF0uHeFnknW+ijEtt5DsGtAWJ+zHR7QP/GTjydn8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728299AbfEQTge (ORCPT ); Fri, 17 May 2019 15:36:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:50268 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726293AbfEQTgd (ORCPT ); Fri, 17 May 2019 15:36:33 -0400 Received: from quaco.ghostprotocols.net (unknown [190.15.121.82]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 918B3216FD; Fri, 17 May 2019 19:36:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558121791; bh=0FF4YAV2w/hGdXi0RPmMnEM2sfLMauRluAhW+jsvYBM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Py5LSJN2y27CL65FtzGOTZeSLBWdvE37CAjxUemPsKMXKhgaUtvzV83KFTtmELnzs RD0J2WGO1ft10azlu8qz7djcEn1UadFnNJgQVoxxtBR1qOtzO/iTnpppVYOh9wZgJ5 QZgEudbl7RyubxNtSgEAWYjo3JgJ4zqiP3L7y2p4= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Jin Yao , Arnaldo Carvalho de Melo , Alexander Shishkin , Andi Kleen , Jin Yao , Kan Liang , Peter Zijlstra Subject: [PATCH 01/73] perf annotate: Remove hist__account_cycles() from callback Date: Fri, 17 May 2019 16:34:59 -0300 Message-Id: <20190517193611.4974-2-acme@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190517193611.4974-1-acme@kernel.org> References: <20190517193611.4974-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jin Yao The hist__account_cycles() function is executed when the hist_iter__branch_callback() is called. But it looks it's not necessary. In hist__account_cycles, it already walks on all branch entries. This patch moves the hist__account_cycles out of callback, now the data processing is much faster than before. Previous code has an issue that the ch[offset].num++ (in __symbol__account_cycles) is executed repeatedly since hist__account_cycles is called in each hist_iter__branch_callback, so the counting of ch[offset].num is not correct (too big). With this patch, the issue is fixed. And we don't need the code of "ch->reset >= ch->num / 2" to check if there are too many overlaps (in annotation__count_and_fill), otherwise some data would be hidden. Now, we can try, for example: perf record -b ... perf annotate or perf report -s symbol The before/after output should be no change. v3: --- Fix the crash in stdio mode. Like previous code, it needs the checking of ui__has_annotation() before hist__account_cycles() v2: --- 1. Cover the similar perf report 2. Remove the checking code "ch->reset >= ch->num / 2" Signed-off-by: Jin Yao Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jin Yao Cc: Jiri Olsa Cc: Kan Liang Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1552684577-29041-1-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-annotate.c | 4 ++-- tools/perf/builtin-report.c | 11 +++++------ tools/perf/util/annotate.c | 2 +- 3 files changed, 8 insertions(+), 9 deletions(-) diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index 67f9d9ffacfb..77deb3a40596 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -159,8 +159,6 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter, struct perf_evsel *evsel = iter->evsel; int err; - hist__account_cycles(sample->branch_stack, al, sample, false); - bi = he->branch_info; err = addr_map_symbol__inc_samples(&bi->from, sample, evsel); @@ -199,6 +197,8 @@ static int process_branch_callback(struct perf_evsel *evsel, if (a.map != NULL) a.map->dso->hit = 1; + hist__account_cycles(sample->branch_stack, al, sample, false); + ret = hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann); return ret; } diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 4054eb1f98ac..91e27ac297c2 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -136,9 +136,6 @@ static int hist_iter__report_callback(struct hist_entry_iter *iter, if (!ui__has_annotation() && !rep->symbol_ipc) return 0; - hist__account_cycles(sample->branch_stack, al, sample, - rep->nonany_branch_mode); - if (sort__mode == SORT_MODE__BRANCH) { bi = he->branch_info; err = addr_map_symbol__inc_samples(&bi->from, sample, evsel); @@ -181,9 +178,6 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter, if (!ui__has_annotation() && !rep->symbol_ipc) return 0; - hist__account_cycles(sample->branch_stack, al, sample, - rep->nonany_branch_mode); - bi = he->branch_info; err = addr_map_symbol__inc_samples(&bi->from, sample, evsel); if (err) @@ -282,6 +276,11 @@ static int process_sample_event(struct perf_tool *tool, if (al.map != NULL) al.map->dso->hit = 1; + if (ui__has_annotation() || rep->symbol_ipc) { + hist__account_cycles(sample->branch_stack, &al, sample, + rep->nonany_branch_mode); + } + ret = hist_entry_iter__add(&iter, &al, rep->max_stack, rep); if (ret < 0) pr_debug("problem adding hist entry, skipping event\n"); diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 09762985c713..0b8573fd9b05 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -1021,7 +1021,7 @@ static void annotation__count_and_fill(struct annotation *notes, u64 start, u64 float ipc = n_insn / ((double)ch->cycles / (double)ch->num); /* Hide data when there are too many overlaps. */ - if (ch->reset >= 0x7fff || ch->reset >= ch->num / 2) + if (ch->reset >= 0x7fff) return; for (offset = start; offset <= end; offset++) { -- 2.20.1