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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9249C6FD1D for ; Wed, 15 Mar 2023 14:53:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233125AbjCOOx0 (ORCPT ); Wed, 15 Mar 2023 10:53:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233217AbjCOOxD (ORCPT ); Wed, 15 Mar 2023 10:53:03 -0400 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9B35943B1 for ; Wed, 15 Mar 2023 07:52:36 -0700 (PDT) Received: by mail-pj1-x102f.google.com with SMTP id k18-20020a17090a591200b0023d36e30cb5so2093963pji.1 for ; Wed, 15 Mar 2023 07:52:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678891953; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VpX5eG5BICdwUiyxxIOGXbe9ltJnRnUa5/qhb/BObdw=; b=IhD7gDtNXKpVqae6GrAVGJREdsRwLhQsCsDulpzLIHFujBKus4mwz/k7gzrvWaBg6t 3RL6+nTh1GLVE6A2rK/wCg2omf4nbnbsD0ctSsaN4KQcxbI12FlDnPuKfhxi5D23MnWV girZAy8wsHPYv5HtGqa0660B/9C7tWbeJ5QU6dlBDcKdlKzo1IcZdoAYsDnSMB2Ah1Sc 4KKtdkHcNlEhKfJgS8BhRMwt8evU0PG5PfiYnBlcqxrbhhmS7oKvOuumOko6m6CPTQgv j4XRD94+3vTLrgb70Pa837uPY3ZY8uaMdJlGFNh7e4SLeS+beSOV+koYUx5fTinTfwDo TC3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678891953; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VpX5eG5BICdwUiyxxIOGXbe9ltJnRnUa5/qhb/BObdw=; b=GzZIPCvsfK2S+BMB5hac1ZqjllsixAskEdHdwc+qSWHQM3QCkXG5qMI2TDFOwwTSRq s+BDW08UI4ccSu3LFbf6moBU5sjkJpFjxh4fOkim/jYlMlO8pPogLYFuIECaLrIEFUIZ Oku8MP5z1kz4yolOqefy0T998Ofa0UB5XVgvK2DpL7G2BYnVsdwjuxP/A3AnC0XgBZLj Epe4DKyR+ROajobHy1J31H2Ed9onAF5C3PmknrLoJTtk5+s8NXStGQOPZVRzeVdayqfO o374D2KtJTlTgHuybtfK2TsIc/hD1TVAZGZ+KovCSPbHDA8GAbNj4Z+9NJ3m13IxmcNR NkzQ== X-Gm-Message-State: AO0yUKUmGiYpJpJQqnCk9sdXwhvyB9SusVVz4mf3tukAKgTg80njieR+ 4XjBcuQi9XsFZviJPin1kIDfhQ== X-Google-Smtp-Source: AK7set988SHmFCSkIwmVtr0pBg1nX7tBBXroJ6DfZCJ0oeOUVVX0GAEi1459Qr46+KRJVUaE+ctlWg== X-Received: by 2002:a17:903:886:b0:1a0:4526:3535 with SMTP id kt6-20020a170903088600b001a045263535mr2789903plb.57.1678891953208; Wed, 15 Mar 2023 07:52:33 -0700 (PDT) Received: from leoy-huanghe.lan ([107.151.177.133]) by smtp.gmail.com with ESMTPSA id kh3-20020a170903064300b0019926c77577sm3781587plb.90.2023.03.15.07.52.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Mar 2023 07:52:32 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Jiri Olsa , Namhyung Kim , Ian Rogers , John Garry , James Clark , Adrian Hunter , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan Subject: [PATCH v5 11/16] perf kvm: Use histograms list to replace cached list Date: Wed, 15 Mar 2023 22:51:07 +0800 Message-Id: <20230315145112.186603-12-leo.yan@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230315145112.186603-1-leo.yan@linaro.org> References: <20230315145112.186603-1-leo.yan@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org perf kvm tool defines its own cached list which is managed with RB tree, histograms also provide RB tree to manage data entries. Since now we have introduced histograms in the tool, it's not necessary to use the self defined list and we can directly use histograms list to manage KVM events. This patch changes to use histograms list to track KVM events, and it invokes the common function hists__output_resort_cb() to sort result, this also give us flexibility to extend more sorting key words easily. After histograms list supported, the cached list is redundant so remove the relevant code for it. Signed-off-by: Leo Yan --- tools/perf/builtin-kvm.c | 189 +++++++++++++++++++------------------ tools/perf/util/kvm-stat.h | 7 -- 2 files changed, 95 insertions(+), 101 deletions(-) diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 3f601ccb7aab..ba3134613bcb 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -323,6 +323,12 @@ static int kvm_hists__init(void) return kvm_hpp_list__parse(&kvm_hists.list, NULL, "ev_name"); } +static int kvm_hists__reinit(const char *output, const char *sort) +{ + perf_hpp__reset_output_field(&kvm_hists.list); + return kvm_hpp_list__parse(&kvm_hists.list, output, sort); +} + static const char *get_filename_for_perf_kvm(void) { const char *filename; @@ -420,44 +426,37 @@ struct vcpu_event_record { struct kvm_event *last_event; }; - -static void init_kvm_event_record(struct perf_kvm_stat *kvm) -{ - unsigned int i; - - for (i = 0; i < EVENTS_CACHE_SIZE; i++) - INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); -} - #ifdef HAVE_TIMERFD_SUPPORT -static void clear_events_cache_stats(struct list_head *kvm_events_cache) +static void clear_events_cache_stats(void) { - struct list_head *head; + struct rb_root_cached *root; + struct rb_node *nd; struct kvm_event *event; - unsigned int i; - int j; - - for (i = 0; i < EVENTS_CACHE_SIZE; i++) { - head = &kvm_events_cache[i]; - list_for_each_entry(event, head, hash_entry) { - /* reset stats for event */ - event->total.time = 0; - init_stats(&event->total.stats); - - for (j = 0; j < event->max_vcpu; ++j) { - event->vcpu[j].time = 0; - init_stats(&event->vcpu[j].stats); - } + int i; + + if (hists__has(&kvm_hists.hists, need_collapse)) + root = &kvm_hists.hists.entries_collapsed; + else + root = kvm_hists.hists.entries_in; + + for (nd = rb_first_cached(root); nd; nd = rb_next(nd)) { + struct hist_entry *he; + + he = rb_entry(nd, struct hist_entry, rb_node_in); + event = container_of(he, struct kvm_event, he); + + /* reset stats for event */ + event->total.time = 0; + init_stats(&event->total.stats); + + for (i = 0; i < event->max_vcpu; ++i) { + event->vcpu[i].time = 0; + init_stats(&event->vcpu[i].stats); } } } #endif -static int kvm_events_hash_fn(u64 key) -{ - return key & (EVENTS_CACHE_SIZE - 1); -} - static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) { int old_max_vcpu = event->max_vcpu; @@ -483,44 +482,64 @@ static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) return true; } -static struct kvm_event *kvm_alloc_init_event(struct perf_kvm_stat *kvm, - struct event_key *key, - struct perf_sample *sample __maybe_unused) +static void *kvm_he_zalloc(size_t size) { - struct kvm_event *event; + struct kvm_event *kvm_ev; - event = zalloc(sizeof(*event)); - if (!event) { - pr_err("Not enough memory\n"); + kvm_ev = zalloc(size + sizeof(*kvm_ev)); + if (!kvm_ev) return NULL; - } - event->perf_kvm = kvm; - event->key = *key; - init_stats(&event->total.stats); - return event; + init_stats(&kvm_ev->total.stats); + hists__inc_nr_samples(&kvm_hists.hists, 0); + return &kvm_ev->he; +} + +static void kvm_he_free(void *he) +{ + struct kvm_event *kvm_ev; + + free(((struct hist_entry *)he)->kvm_info); + kvm_ev = container_of(he, struct kvm_event, he); + free(kvm_ev); } +static struct hist_entry_ops kvm_ev_entry_ops = { + .new = kvm_he_zalloc, + .free = kvm_he_free, +}; + static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, struct event_key *key, struct perf_sample *sample) { struct kvm_event *event; - struct list_head *head; + struct hist_entry *he; + struct kvm_info *ki; BUG_ON(key->key == INVALID_KEY); - head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; - list_for_each_entry(event, head, hash_entry) { - if (event->key.key == key->key && event->key.info == key->info) - return event; + ki = zalloc(sizeof(*ki)); + if (!ki) { + pr_err("Failed to allocate kvm info\n"); + return NULL; } - event = kvm_alloc_init_event(kvm, key, sample); - if (!event) + kvm->events_ops->decode_key(kvm, key, ki->name); + he = hists__add_entry_ops(&kvm_hists.hists, &kvm_ev_entry_ops, + &kvm->al, NULL, NULL, NULL, ki, sample, true); + if (he == NULL) { + pr_err("Failed to allocate hist entry\n"); + free(ki); return NULL; + } + + event = container_of(he, struct kvm_event, he); + if (!event->perf_kvm) { + event->perf_kvm = kvm; + event->key = *key; + } - list_add(&event->hash_entry, head); return event; } @@ -753,58 +772,32 @@ static bool select_key(struct perf_kvm_stat *kvm) return false; } -static void insert_to_result(struct rb_root *result, struct kvm_event *event, - key_cmp_fun bigger, int vcpu) -{ - struct rb_node **rb = &result->rb_node; - struct rb_node *parent = NULL; - struct kvm_event *p; - - while (*rb) { - p = container_of(*rb, struct kvm_event, rb); - parent = *rb; - - if (bigger(event, p, vcpu) > 0) - rb = &(*rb)->rb_left; - else - rb = &(*rb)->rb_right; - } - - rb_link_node(&event->rb, parent, rb); - rb_insert_color(&event->rb, result); -} - static bool event_is_valid(struct kvm_event *event, int vcpu) { return !!get_event_count(event, vcpu); } -static void sort_result(struct perf_kvm_stat *kvm) +static int filter_cb(struct hist_entry *he, void *arg __maybe_unused) { - unsigned int i; - int vcpu = kvm->trace_vcpu; struct kvm_event *event; + struct perf_kvm_stat *perf_kvm; - for (i = 0; i < EVENTS_CACHE_SIZE; i++) { - list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { - if (event_is_valid(event, vcpu)) { - insert_to_result(&kvm->result, event, - kvm->compare, vcpu); - } - } - } + event = container_of(he, struct kvm_event, he); + perf_kvm = event->perf_kvm; + if (!event_is_valid(event, perf_kvm->trace_vcpu)) + he->filtered = 1; + else + he->filtered = 0; + return 0; } -/* returns left most element of result, and erase it */ -static struct kvm_event *pop_from_result(struct rb_root *result) +static void sort_result(struct perf_kvm_stat *kvm) { - struct rb_node *node = rb_first(result); - - if (!node) - return NULL; + const char *output_columns = "ev_name,sample,time,max_t,min_t,mean_t"; - rb_erase(node, result); - return container_of(node, struct kvm_event, rb); + kvm_hists__reinit(output_columns, kvm->sort_key); + hists__collapse_resort(&kvm_hists.hists, NULL); + hists__output_resort_cb(&kvm_hists.hists, NULL, filter_cb); } static void print_vcpu_info(struct perf_kvm_stat *kvm) @@ -847,6 +840,7 @@ static void print_result(struct perf_kvm_stat *kvm) char decode[KVM_EVENT_NAME_LEN]; struct kvm_event *event; int vcpu = kvm->trace_vcpu; + struct rb_node *nd; if (kvm->live) { puts(CONSOLE_CLEAR); @@ -865,9 +859,15 @@ static void print_result(struct perf_kvm_stat *kvm) pr_info("%16s ", "Avg time"); pr_info("\n\n"); - while ((event = pop_from_result(&kvm->result))) { + for (nd = rb_first_cached(&kvm_hists.hists.entries); nd; nd = rb_next(nd)) { + struct hist_entry *he; u64 ecount, etime, max, min; + he = rb_entry(nd, struct hist_entry, rb_node); + if (he->filtered) + continue; + + event = container_of(he, struct kvm_event, he); ecount = get_event_count(event, vcpu); etime = get_event_time(event, vcpu); max = get_event_max(event, vcpu); @@ -1144,8 +1144,11 @@ static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) sort_result(kvm); print_result(kvm); + /* Reset sort list to "ev_name" */ + kvm_hists__reinit(NULL, "ev_name"); + /* reset counts */ - clear_events_cache_stats(kvm->kvm_events_cache); + clear_events_cache_stats(); kvm->total_count = 0; kvm->total_time = 0; kvm->lost_events = 0; @@ -1201,7 +1204,6 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm) } set_term_quiet_input(&save); - init_kvm_event_record(kvm); kvm_hists__init(); @@ -1397,7 +1399,6 @@ static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) if (!register_kvm_events_ops(kvm)) goto exit; - init_kvm_event_record(kvm); setup_pager(); kvm_hists__init(); diff --git a/tools/perf/util/kvm-stat.h b/tools/perf/util/kvm-stat.h index fc30a72dfac1..3f0cbecb862c 100644 --- a/tools/perf/util/kvm-stat.h +++ b/tools/perf/util/kvm-stat.h @@ -36,7 +36,6 @@ struct perf_kvm_stat; struct kvm_event { struct list_head hash_entry; - struct rb_node rb; struct perf_kvm_stat *perf_kvm; struct event_key key; @@ -81,9 +80,6 @@ struct exit_reasons_table { const char *reason; }; -#define EVENTS_BITS 12 -#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS) - struct perf_kvm_stat { struct perf_tool tool; struct record_opts opts; @@ -103,7 +99,6 @@ struct perf_kvm_stat { struct kvm_events_ops *events_ops; key_cmp_fun compare; - struct list_head kvm_events_cache[EVENTS_CACHE_SIZE]; u64 total_time; u64 total_count; @@ -112,8 +107,6 @@ struct perf_kvm_stat { struct intlist *pid_list; - struct rb_root result; - int timerfd; unsigned int display_time; bool live; -- 2.34.1 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E8C6DC7618D for ; Wed, 15 Mar 2023 14:53:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Je1z9GjHGDnrbMdMNDSWjr1oA8P+gcWNsrIXMGQvre0=; b=DwmTIRMRd8Osit iu167Uxs/1k1HhA1XQ13CsOClT/Z8tSDmAtTWWaAQ1pr9a3JWLzYbIW3DSPMDt47ehzHcw+bhykTc +d2phBTwIH4WW2YMHXpRlcZyJEnXBdhNmYBcTfc3VZ+Ai/VazfSTc18WAgB5cHo69L7O6Wz8fijV2 mxcwQiTerzQEN20dI5u9Njcsw9kouAM4jF3g6WgXA0KfliG6wQZngb9hSfMEDurWpE5g4RBddxHYy UffiigGJ6bf5BNgWY5cDbSU6sw4/ccp/Hnc9mcmAv4vbxmvUWvv0IuojYjfPaXGX1KaATBMaLbUAg wouy/OfhIZDBV8onarmA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pcSUf-00DfkL-2c; Wed, 15 Mar 2023 14:52:45 +0000 Received: from mail-pj1-x1034.google.com ([2607:f8b0:4864:20::1034]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pcSUW-00Dfbh-1V for linux-arm-kernel@lists.infradead.org; Wed, 15 Mar 2023 14:52:38 +0000 Received: by mail-pj1-x1034.google.com with SMTP id l9-20020a17090a3f0900b0023d32684e7fso3601726pjc.1 for ; Wed, 15 Mar 2023 07:52:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678891953; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VpX5eG5BICdwUiyxxIOGXbe9ltJnRnUa5/qhb/BObdw=; b=IhD7gDtNXKpVqae6GrAVGJREdsRwLhQsCsDulpzLIHFujBKus4mwz/k7gzrvWaBg6t 3RL6+nTh1GLVE6A2rK/wCg2omf4nbnbsD0ctSsaN4KQcxbI12FlDnPuKfhxi5D23MnWV girZAy8wsHPYv5HtGqa0660B/9C7tWbeJ5QU6dlBDcKdlKzo1IcZdoAYsDnSMB2Ah1Sc 4KKtdkHcNlEhKfJgS8BhRMwt8evU0PG5PfiYnBlcqxrbhhmS7oKvOuumOko6m6CPTQgv j4XRD94+3vTLrgb70Pa837uPY3ZY8uaMdJlGFNh7e4SLeS+beSOV+koYUx5fTinTfwDo TC3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678891953; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VpX5eG5BICdwUiyxxIOGXbe9ltJnRnUa5/qhb/BObdw=; b=Cgx5XtaAjFHhCig9EoFGLJBv6nqC33PTlkMxipamIX3qx3kjB/kYNK4SvayzO9yb+I oFl26TjCr5cSl4aE1sObfn0N6lQqneKD1YjSDxEsLTOaxpqvBDWGDf8eUvy5f5Alj42M STSvsSFodRJF/JYE4zw2rZ6uHMDkrhjonybK+veJB073sxo9eqdtHG0UwrNIaHOKzPcq 0wht8gpYMM+rjVget9mkfJ5pEKCJCH5BBm1WZXewjuxoQnIiV8t9yBXPDkfAjFsWkECa 9lnZj1FAY5r50/S8G07+O9EYiYacossRq8lqUp13tCP6x+acxFXKty7FBwNMuJ+3CFd+ ak7Q== X-Gm-Message-State: AO0yUKVM7aWUwSa0JuYQBybA7TiuZ25VBphqBBhMokQCs9WXQbsWP6MI k2+AVjxJZshyaadUNdeiHPNBmw== X-Google-Smtp-Source: AK7set988SHmFCSkIwmVtr0pBg1nX7tBBXroJ6DfZCJ0oeOUVVX0GAEi1459Qr46+KRJVUaE+ctlWg== X-Received: by 2002:a17:903:886:b0:1a0:4526:3535 with SMTP id kt6-20020a170903088600b001a045263535mr2789903plb.57.1678891953208; Wed, 15 Mar 2023 07:52:33 -0700 (PDT) Received: from leoy-huanghe.lan ([107.151.177.133]) by smtp.gmail.com with ESMTPSA id kh3-20020a170903064300b0019926c77577sm3781587plb.90.2023.03.15.07.52.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Mar 2023 07:52:32 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Jiri Olsa , Namhyung Kim , Ian Rogers , John Garry , James Clark , Adrian Hunter , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan Subject: [PATCH v5 11/16] perf kvm: Use histograms list to replace cached list Date: Wed, 15 Mar 2023 22:51:07 +0800 Message-Id: <20230315145112.186603-12-leo.yan@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230315145112.186603-1-leo.yan@linaro.org> References: <20230315145112.186603-1-leo.yan@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230315_075236_512745_206048FE X-CRM114-Status: GOOD ( 25.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org perf kvm tool defines its own cached list which is managed with RB tree, histograms also provide RB tree to manage data entries. Since now we have introduced histograms in the tool, it's not necessary to use the self defined list and we can directly use histograms list to manage KVM events. This patch changes to use histograms list to track KVM events, and it invokes the common function hists__output_resort_cb() to sort result, this also give us flexibility to extend more sorting key words easily. After histograms list supported, the cached list is redundant so remove the relevant code for it. Signed-off-by: Leo Yan --- tools/perf/builtin-kvm.c | 189 +++++++++++++++++++------------------ tools/perf/util/kvm-stat.h | 7 -- 2 files changed, 95 insertions(+), 101 deletions(-) diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 3f601ccb7aab..ba3134613bcb 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -323,6 +323,12 @@ static int kvm_hists__init(void) return kvm_hpp_list__parse(&kvm_hists.list, NULL, "ev_name"); } +static int kvm_hists__reinit(const char *output, const char *sort) +{ + perf_hpp__reset_output_field(&kvm_hists.list); + return kvm_hpp_list__parse(&kvm_hists.list, output, sort); +} + static const char *get_filename_for_perf_kvm(void) { const char *filename; @@ -420,44 +426,37 @@ struct vcpu_event_record { struct kvm_event *last_event; }; - -static void init_kvm_event_record(struct perf_kvm_stat *kvm) -{ - unsigned int i; - - for (i = 0; i < EVENTS_CACHE_SIZE; i++) - INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); -} - #ifdef HAVE_TIMERFD_SUPPORT -static void clear_events_cache_stats(struct list_head *kvm_events_cache) +static void clear_events_cache_stats(void) { - struct list_head *head; + struct rb_root_cached *root; + struct rb_node *nd; struct kvm_event *event; - unsigned int i; - int j; - - for (i = 0; i < EVENTS_CACHE_SIZE; i++) { - head = &kvm_events_cache[i]; - list_for_each_entry(event, head, hash_entry) { - /* reset stats for event */ - event->total.time = 0; - init_stats(&event->total.stats); - - for (j = 0; j < event->max_vcpu; ++j) { - event->vcpu[j].time = 0; - init_stats(&event->vcpu[j].stats); - } + int i; + + if (hists__has(&kvm_hists.hists, need_collapse)) + root = &kvm_hists.hists.entries_collapsed; + else + root = kvm_hists.hists.entries_in; + + for (nd = rb_first_cached(root); nd; nd = rb_next(nd)) { + struct hist_entry *he; + + he = rb_entry(nd, struct hist_entry, rb_node_in); + event = container_of(he, struct kvm_event, he); + + /* reset stats for event */ + event->total.time = 0; + init_stats(&event->total.stats); + + for (i = 0; i < event->max_vcpu; ++i) { + event->vcpu[i].time = 0; + init_stats(&event->vcpu[i].stats); } } } #endif -static int kvm_events_hash_fn(u64 key) -{ - return key & (EVENTS_CACHE_SIZE - 1); -} - static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) { int old_max_vcpu = event->max_vcpu; @@ -483,44 +482,64 @@ static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) return true; } -static struct kvm_event *kvm_alloc_init_event(struct perf_kvm_stat *kvm, - struct event_key *key, - struct perf_sample *sample __maybe_unused) +static void *kvm_he_zalloc(size_t size) { - struct kvm_event *event; + struct kvm_event *kvm_ev; - event = zalloc(sizeof(*event)); - if (!event) { - pr_err("Not enough memory\n"); + kvm_ev = zalloc(size + sizeof(*kvm_ev)); + if (!kvm_ev) return NULL; - } - event->perf_kvm = kvm; - event->key = *key; - init_stats(&event->total.stats); - return event; + init_stats(&kvm_ev->total.stats); + hists__inc_nr_samples(&kvm_hists.hists, 0); + return &kvm_ev->he; +} + +static void kvm_he_free(void *he) +{ + struct kvm_event *kvm_ev; + + free(((struct hist_entry *)he)->kvm_info); + kvm_ev = container_of(he, struct kvm_event, he); + free(kvm_ev); } +static struct hist_entry_ops kvm_ev_entry_ops = { + .new = kvm_he_zalloc, + .free = kvm_he_free, +}; + static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, struct event_key *key, struct perf_sample *sample) { struct kvm_event *event; - struct list_head *head; + struct hist_entry *he; + struct kvm_info *ki; BUG_ON(key->key == INVALID_KEY); - head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; - list_for_each_entry(event, head, hash_entry) { - if (event->key.key == key->key && event->key.info == key->info) - return event; + ki = zalloc(sizeof(*ki)); + if (!ki) { + pr_err("Failed to allocate kvm info\n"); + return NULL; } - event = kvm_alloc_init_event(kvm, key, sample); - if (!event) + kvm->events_ops->decode_key(kvm, key, ki->name); + he = hists__add_entry_ops(&kvm_hists.hists, &kvm_ev_entry_ops, + &kvm->al, NULL, NULL, NULL, ki, sample, true); + if (he == NULL) { + pr_err("Failed to allocate hist entry\n"); + free(ki); return NULL; + } + + event = container_of(he, struct kvm_event, he); + if (!event->perf_kvm) { + event->perf_kvm = kvm; + event->key = *key; + } - list_add(&event->hash_entry, head); return event; } @@ -753,58 +772,32 @@ static bool select_key(struct perf_kvm_stat *kvm) return false; } -static void insert_to_result(struct rb_root *result, struct kvm_event *event, - key_cmp_fun bigger, int vcpu) -{ - struct rb_node **rb = &result->rb_node; - struct rb_node *parent = NULL; - struct kvm_event *p; - - while (*rb) { - p = container_of(*rb, struct kvm_event, rb); - parent = *rb; - - if (bigger(event, p, vcpu) > 0) - rb = &(*rb)->rb_left; - else - rb = &(*rb)->rb_right; - } - - rb_link_node(&event->rb, parent, rb); - rb_insert_color(&event->rb, result); -} - static bool event_is_valid(struct kvm_event *event, int vcpu) { return !!get_event_count(event, vcpu); } -static void sort_result(struct perf_kvm_stat *kvm) +static int filter_cb(struct hist_entry *he, void *arg __maybe_unused) { - unsigned int i; - int vcpu = kvm->trace_vcpu; struct kvm_event *event; + struct perf_kvm_stat *perf_kvm; - for (i = 0; i < EVENTS_CACHE_SIZE; i++) { - list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { - if (event_is_valid(event, vcpu)) { - insert_to_result(&kvm->result, event, - kvm->compare, vcpu); - } - } - } + event = container_of(he, struct kvm_event, he); + perf_kvm = event->perf_kvm; + if (!event_is_valid(event, perf_kvm->trace_vcpu)) + he->filtered = 1; + else + he->filtered = 0; + return 0; } -/* returns left most element of result, and erase it */ -static struct kvm_event *pop_from_result(struct rb_root *result) +static void sort_result(struct perf_kvm_stat *kvm) { - struct rb_node *node = rb_first(result); - - if (!node) - return NULL; + const char *output_columns = "ev_name,sample,time,max_t,min_t,mean_t"; - rb_erase(node, result); - return container_of(node, struct kvm_event, rb); + kvm_hists__reinit(output_columns, kvm->sort_key); + hists__collapse_resort(&kvm_hists.hists, NULL); + hists__output_resort_cb(&kvm_hists.hists, NULL, filter_cb); } static void print_vcpu_info(struct perf_kvm_stat *kvm) @@ -847,6 +840,7 @@ static void print_result(struct perf_kvm_stat *kvm) char decode[KVM_EVENT_NAME_LEN]; struct kvm_event *event; int vcpu = kvm->trace_vcpu; + struct rb_node *nd; if (kvm->live) { puts(CONSOLE_CLEAR); @@ -865,9 +859,15 @@ static void print_result(struct perf_kvm_stat *kvm) pr_info("%16s ", "Avg time"); pr_info("\n\n"); - while ((event = pop_from_result(&kvm->result))) { + for (nd = rb_first_cached(&kvm_hists.hists.entries); nd; nd = rb_next(nd)) { + struct hist_entry *he; u64 ecount, etime, max, min; + he = rb_entry(nd, struct hist_entry, rb_node); + if (he->filtered) + continue; + + event = container_of(he, struct kvm_event, he); ecount = get_event_count(event, vcpu); etime = get_event_time(event, vcpu); max = get_event_max(event, vcpu); @@ -1144,8 +1144,11 @@ static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) sort_result(kvm); print_result(kvm); + /* Reset sort list to "ev_name" */ + kvm_hists__reinit(NULL, "ev_name"); + /* reset counts */ - clear_events_cache_stats(kvm->kvm_events_cache); + clear_events_cache_stats(); kvm->total_count = 0; kvm->total_time = 0; kvm->lost_events = 0; @@ -1201,7 +1204,6 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm) } set_term_quiet_input(&save); - init_kvm_event_record(kvm); kvm_hists__init(); @@ -1397,7 +1399,6 @@ static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) if (!register_kvm_events_ops(kvm)) goto exit; - init_kvm_event_record(kvm); setup_pager(); kvm_hists__init(); diff --git a/tools/perf/util/kvm-stat.h b/tools/perf/util/kvm-stat.h index fc30a72dfac1..3f0cbecb862c 100644 --- a/tools/perf/util/kvm-stat.h +++ b/tools/perf/util/kvm-stat.h @@ -36,7 +36,6 @@ struct perf_kvm_stat; struct kvm_event { struct list_head hash_entry; - struct rb_node rb; struct perf_kvm_stat *perf_kvm; struct event_key key; @@ -81,9 +80,6 @@ struct exit_reasons_table { const char *reason; }; -#define EVENTS_BITS 12 -#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS) - struct perf_kvm_stat { struct perf_tool tool; struct record_opts opts; @@ -103,7 +99,6 @@ struct perf_kvm_stat { struct kvm_events_ops *events_ops; key_cmp_fun compare; - struct list_head kvm_events_cache[EVENTS_CACHE_SIZE]; u64 total_time; u64 total_count; @@ -112,8 +107,6 @@ struct perf_kvm_stat { struct intlist *pid_list; - struct rb_root result; - int timerfd; unsigned int display_time; bool live; -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel