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 69EE8C433EF for ; Tue, 3 May 2022 04:18:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231136AbiECEVu (ORCPT ); Tue, 3 May 2022 00:21:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230501AbiECEVh (ORCPT ); Tue, 3 May 2022 00:21:37 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B79B138D89 for ; Mon, 2 May 2022 21:18:05 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-2f902276272so43806197b3.21 for ; Mon, 02 May 2022 21:18:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=QD3DUc26sP7ykTIj1yIZzampBuXqJbDmnGb6bGuMDs8=; b=NokXk5/xkNo3NQGuTnByEoO+krhLeXfq6JfjcXwcJSXmHhFSlGr5vRf/0GOE4udOzy 4RYauE/Js0/9tqje5oT7v/+DN6B6Xl92kuCM2uE+HkPHs7a6czXX0Dsix0YBr2SQcS/p jsY2zfQ2xqQcLNpIMzKxTNlXx5berGEtzw/44QEhwX2e+EKNK53Ru8GD5Io2fU6rXyXG DSlVLV0BXwhk1HmhOmfPz1cmG1pfNMxwyeiNLztlR0wcfmyBTmUc6XoTTdjzQZqKlF/H /kmwY7mJjAub22Ax0TLQ8nRtmnVZYw6YxcRwqEf0PGJUe8StZ/OaYjjk3bWVU49oluZC EQVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=QD3DUc26sP7ykTIj1yIZzampBuXqJbDmnGb6bGuMDs8=; b=ETDfKPoCrvoi1GGnQcYe6N76hmuCpvLq3Fasf+h3KMSraxNXUwYj3jvR/L34ZIc3Yg 6aPBHQonnRrKJCEGfBXjRddz24TL8ssh44ASNe38sWGLO987ub0cd+hi8XrJ9wlvpgLs A+X1u6oXgBnLNswKJkt87oUMVPqZBKSedK8CtAPYsnMGG9/LdPYrh8nMR9WUNVfCPDjO GfmgMJ+mSngN5phy3b6YwERwK9WAqLOQmIxZ4t5GuaapbaxUK3r922UbQ1MTFkWnhyfn tapgHRC+vVVU2zM3MXVhD7KPW80TIJaPT+LSO4jseAVCHT+SVF3GaJqWj5tSgVAZnSTO Zu1A== X-Gm-Message-State: AOAM531HWdNrnqTyys+FEom/48HJ+MonfdnNgWVzb8FVhnjYsQ/PGaDN qMDWRE2bnQ+670b/ojwEsecXcR2KmLrK X-Google-Smtp-Source: ABdhPJxkQdAYSGlIDwzPRvybZXRBQfHSLeYfhwbH5tnTdrY6mFM6YP9HOoQphYHoVoYVEF02TWVPNs9nvaBl X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:202:dd4b:52bb:771d:7bb4]) (user=irogers job=sendgmr) by 2002:a05:6902:725:b0:649:68fd:6d85 with SMTP id l5-20020a056902072500b0064968fd6d85mr7546725ybt.11.1651551484866; Mon, 02 May 2022 21:18:04 -0700 (PDT) Date: Mon, 2 May 2022 21:17:52 -0700 In-Reply-To: <20220503041757.2365696-1-irogers@google.com> Message-Id: <20220503041757.2365696-2-irogers@google.com> Mime-Version: 1.0 References: <20220503041757.2365696-1-irogers@google.com> X-Mailer: git-send-email 2.36.0.464.gb9c8b46e94-goog Subject: [PATCH v5 1/6] perf cpumap: Switch to using perf_cpu_map API From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Mathieu Poirier , Suzuki K Poulose , Mike Leach , Leo Yan , John Garry , Will Deacon , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Kajol Jain , James Clark , German Gomez , Adrian Hunter , Riccardo Mancini , Andi Kleen , Alexey Bayduraev , Alexander Antonov , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Stephane Eranian , Ian Rogers Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Switch some raw accesses to the cpu map to using the library API. This can help with reference count checking. Some BPF cases switch from index to CPU for consistency, this shouldn't matter as the CPU map is full. Signed-off-by: Ian Rogers --- tools/perf/builtin-record.c | 13 +++++---- tools/perf/util/bpf_counter_cgroup.c | 42 +++++++++++++--------------- 2 files changed, 26 insertions(+), 29 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 069825c48d40..a5cf6a99d67f 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1011,7 +1011,7 @@ static int record__thread_data_init_maps(struct record_thread *thread_data, stru for (m = 0, tm = 0; m < nr_mmaps && tm < thread_data->nr_mmaps; m++) { if (cpu_map__is_dummy(cpus) || - test_bit(cpus->map[m].cpu, thread_data->mask->maps.bits)) { + test_bit(perf_cpu_map__cpu(cpus, m).cpu, thread_data->mask->maps.bits)) { if (thread_data->maps) { thread_data->maps[tm] = &mmap[m]; pr_debug2("thread_data[%p]: cpu%d: maps[%d] -> mmap[%d]\n", @@ -3331,13 +3331,14 @@ struct option *record_options = __record_options; static void record__mmap_cpu_mask_init(struct mmap_cpu_mask *mask, struct perf_cpu_map *cpus) { - int c; + struct perf_cpu cpu; + int idx; if (cpu_map__is_dummy(cpus)) return; - for (c = 0; c < cpus->nr; c++) - set_bit(cpus->map[c].cpu, mask->bits); + perf_cpu_map__for_each_cpu(cpu, idx, cpus) + set_bit(cpu.cpu, mask->bits); } static int record__mmap_cpu_mask_init_spec(struct mmap_cpu_mask *mask, const char *mask_spec) @@ -3404,8 +3405,8 @@ static int record__init_thread_cpu_masks(struct record *rec, struct perf_cpu_map pr_debug("nr_threads: %d\n", rec->nr_threads); for (t = 0; t < rec->nr_threads; t++) { - set_bit(cpus->map[t].cpu, rec->thread_masks[t].maps.bits); - set_bit(cpus->map[t].cpu, rec->thread_masks[t].affinity.bits); + set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].maps.bits); + set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].affinity.bits); if (verbose) { pr_debug("thread_masks[%d]: ", t); mmap_cpu_mask__scnprintf(&rec->thread_masks[t].maps, "maps"); diff --git a/tools/perf/util/bpf_counter_cgroup.c b/tools/perf/util/bpf_counter_cgroup.c index ac60c08e8e2a..63b9db657442 100644 --- a/tools/perf/util/bpf_counter_cgroup.c +++ b/tools/perf/util/bpf_counter_cgroup.c @@ -46,8 +46,8 @@ static int bperf_load_program(struct evlist *evlist) struct bpf_link *link; struct evsel *evsel; struct cgroup *cgrp, *leader_cgrp; - __u32 i, cpu; - __u32 nr_cpus = evlist->core.all_cpus->nr; + int i, j; + struct perf_cpu cpu; int total_cpus = cpu__max_cpu().cpu; int map_size, map_fd; int prog_fd, err; @@ -93,9 +93,9 @@ static int bperf_load_program(struct evlist *evlist) goto out; } - for (i = 0; i < nr_cpus; i++) { + perf_cpu_map__for_each_cpu(cpu, i, evlist->core.all_cpus) { link = bpf_program__attach_perf_event(skel->progs.on_cgrp_switch, - FD(cgrp_switch, i)); + FD(cgrp_switch, cpu.cpu)); if (IS_ERR(link)) { pr_err("Failed to attach cgroup program\n"); err = PTR_ERR(link); @@ -122,10 +122,9 @@ static int bperf_load_program(struct evlist *evlist) } map_fd = bpf_map__fd(skel->maps.events); - for (cpu = 0; cpu < nr_cpus; cpu++) { - int fd = FD(evsel, cpu); - __u32 idx = evsel->core.idx * total_cpus + - evlist->core.all_cpus->map[cpu].cpu; + perf_cpu_map__for_each_cpu(cpu, j, evlist->core.all_cpus) { + int fd = FD(evsel, cpu.cpu); + __u32 idx = evsel->core.idx * total_cpus + cpu.cpu; err = bpf_map_update_elem(map_fd, &idx, &fd, BPF_ANY); @@ -207,14 +206,12 @@ static int bperf_cgrp__install_pe(struct evsel *evsel __maybe_unused, */ static int bperf_cgrp__sync_counters(struct evlist *evlist) { - int i, cpu; - int nr_cpus = evlist->core.all_cpus->nr; + struct perf_cpu cpu; + int idx; int prog_fd = bpf_program__fd(skel->progs.trigger_read); - for (i = 0; i < nr_cpus; i++) { - cpu = evlist->core.all_cpus->map[i].cpu; - bperf_trigger_reading(prog_fd, cpu); - } + perf_cpu_map__for_each_cpu(cpu, idx, evlist->core.all_cpus) + bperf_trigger_reading(prog_fd, cpu.cpu); return 0; } @@ -244,12 +241,10 @@ static int bperf_cgrp__disable(struct evsel *evsel) static int bperf_cgrp__read(struct evsel *evsel) { struct evlist *evlist = evsel->evlist; - int i, cpu, nr_cpus = evlist->core.all_cpus->nr; int total_cpus = cpu__max_cpu().cpu; struct perf_counts_values *counts; struct bpf_perf_event_value *values; int reading_map_fd, err = 0; - __u32 idx; if (evsel->core.idx) return 0; @@ -263,7 +258,10 @@ static int bperf_cgrp__read(struct evsel *evsel) reading_map_fd = bpf_map__fd(skel->maps.cgrp_readings); evlist__for_each_entry(evlist, evsel) { - idx = evsel->core.idx; + __u32 idx = evsel->core.idx; + int i; + struct perf_cpu cpu; + err = bpf_map_lookup_elem(reading_map_fd, &idx, values); if (err) { pr_err("bpf map lookup failed: idx=%u, event=%s, cgrp=%s\n", @@ -271,13 +269,11 @@ static int bperf_cgrp__read(struct evsel *evsel) goto out; } - for (i = 0; i < nr_cpus; i++) { - cpu = evlist->core.all_cpus->map[i].cpu; - + perf_cpu_map__for_each_cpu(cpu, i, evlist->core.all_cpus) { counts = perf_counts(evsel->counts, i, 0); - counts->val = values[cpu].counter; - counts->ena = values[cpu].enabled; - counts->run = values[cpu].running; + counts->val = values[cpu.cpu].counter; + counts->ena = values[cpu.cpu].enabled; + counts->run = values[cpu.cpu].running; } } -- 2.36.0.464.gb9c8b46e94-goog