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 5AF00C433EF for ; Wed, 8 Jun 2022 22:44:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236888AbiFHWoe (ORCPT ); Wed, 8 Jun 2022 18:44:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236785AbiFHWoX (ORCPT ); Wed, 8 Jun 2022 18:44:23 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 582FE2504E3 for ; Wed, 8 Jun 2022 15:44:18 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id e5-20020a255005000000b0065cb3669fe9so18845167ybb.0 for ; Wed, 08 Jun 2022 15:44:18 -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=2geO0ahuljEn77v5yZYAdJcWJ8DuHGsKu15Ptk4z1CU=; b=l5jFMVhRHYNtdJfhQvNcXTPSLsGUyeeftIx9EEF8LyZJstnVOe7pTpdR1efUT7nFfp +uyIF/k/VlGO6TwK70EhNvnpf8zaLXfQr/hFECUmySP7NxbCaJRR9//siudLs5EmGRiV rTt6LaU0zf0wXSptc/7pM5GVsGZlcpQWfE5tzAjOjJZT+MEsuTuu9n4FxN3grDxNY0BT 8LVxfdG0bQR3i86PbSCegT767zZoqGNc5O0mZuziWI4yXpaf8qBBuc1q35Maf0Yk/zbe J/DYLDq2rLzVQGI5Xj9zICvBSgwoMvRexJLYsllbt4Tpus29PqT7ZR5yomFgxamm6g/u n4vg== 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=2geO0ahuljEn77v5yZYAdJcWJ8DuHGsKu15Ptk4z1CU=; b=TkpzssLpv3+Slt303lQL5f3bWB2OVZnh/p9d2RFRcpi1x82jYLqN43rYJyjbBDUO7f Ko1wxDIpKoEu4zTE1BjCv+0l4PHNXkbX/zGZ2kSQwS2mSgt4I6nq0phBixdDo7ESEo+C j89hLK0oaAYRQYY0xhpILMER4sX107mx/4XgCIBvRQEV9daJ5b6kdPYUpUaG9UHuHpXW 5gh7OWt1dlIbLY8EC8zqGEVxras9YPCvKhmkaCNtLc9t+ZtbIW+A4FOFI09q81GucSEK pQse/TTrbFYx9rdHV8Tw4mjJsSr1RcZ4giS6oLWAbVavq6F0o8X9bzkAEHTPjP3Mfxns /Wzg== X-Gm-Message-State: AOAM530j35M073u6LhnNyJzTmfwZKbRiV0KeBxyZCn5SmAycPQKmHNjp TwNX4lyZl2vzbXX7bL+QVm+4uKgPFYnp X-Google-Smtp-Source: ABdhPJwOyTVT6fRTm9r0F+MK1W7bVH/+DpvqtizK5yosDhrXnnn8esrtNJzT6b/akFohsrP2YKqRQOW6xncH X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:202:de48:5efa:e4a1:2219]) (user=irogers job=sendgmr) by 2002:a05:6902:102e:b0:65d:2286:a3b5 with SMTP id x14-20020a056902102e00b0065d2286a3b5mr37765177ybt.515.1654728257392; Wed, 08 Jun 2022 15:44:17 -0700 (PDT) Date: Wed, 8 Jun 2022 15:43:53 -0700 In-Reply-To: <20220608224353.1176079-1-irogers@google.com> Message-Id: <20220608224353.1176079-5-irogers@google.com> Mime-Version: 1.0 References: <20220608224353.1176079-1-irogers@google.com> X-Mailer: git-send-email 2.36.1.255.ge46751e96f-goog Subject: [PATCH 4/4] perf test: Add user space counter reading tests From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Kajol Jain , Andi Kleen , Adrian Hunter , Anshuman Khandual , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Rob Herring Cc: Stephane Eranian , Ian Rogers Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These tests are based on test_stat_user_read in tools/lib/perf/tests/test-evsel.c. The tests are modified to skip if perf_event_open fails or rdpmc isn't supported. Signed-off-by: Ian Rogers --- tools/perf/tests/mmap-basic.c | 128 +++++++++++++++++++++++++++++++++- 1 file changed, 127 insertions(+), 1 deletion(-) diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c index 30bbe144648a..791eebcc5883 100644 --- a/tools/perf/tests/mmap-basic.c +++ b/tools/perf/tests/mmap-basic.c @@ -170,14 +170,140 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest return err; } +static int test_stat_user_read(int event) +{ + struct perf_counts_values counts = { .val = 0 }; + struct perf_thread_map *threads; + struct perf_evsel *evsel; + struct perf_event_mmap_page *pc; + struct perf_event_attr attr = { + .type = PERF_TYPE_HARDWARE, + .config = event, +#ifdef __aarch64__ + .config1 = 0x2, /* Request user access */ +#endif + }; + int err, i, ret = TEST_FAIL; + bool opened = false, mapped = false; + + threads = perf_thread_map__new_dummy(); + TEST_ASSERT_VAL("failed to create threads", threads); + + perf_thread_map__set_pid(threads, 0, 0); + + evsel = perf_evsel__new(&attr); + TEST_ASSERT_VAL("failed to create evsel", evsel); + + err = perf_evsel__open(evsel, NULL, threads); + if (err) { + pr_err("failed to open evsel: %s\n", strerror(-err)); + if (err == -EACCES) + ret = TEST_SKIP; + goto out; + } + opened = true; + + err = perf_evsel__mmap(evsel, 0); + if (err) { + pr_err("failed to mmap evsel: %s\n", strerror(-err)); + goto out; + } + mapped = true; + + pc = perf_evsel__mmap_base(evsel, 0, 0); + if (!pc) { + pr_err("failed to get mmapped address\n"); + goto out; + } + + if (!pc->cap_user_rdpmc || !pc->index) { + pr_err("userspace counter access not %s\n", + !pc->cap_user_rdpmc ? "supported" : "enabled"); + ret = TEST_SKIP; + goto out; + } + if (pc->pmc_width < 32) { + pr_err("userspace counter width not set (%d)\n", pc->pmc_width); + goto out; + } + + perf_evsel__read(evsel, 0, 0, &counts); + if (counts.val == 0) { + pr_err("failed to read value for evsel\n"); + goto out; + } + + for (i = 0; i < 5; i++) { + volatile int count = 0x10000 << i; + __u64 start, end, last = 0; + + pr_debug("\tloop = %u, ", count); + + perf_evsel__read(evsel, 0, 0, &counts); + start = counts.val; + + while (count--) ; + + perf_evsel__read(evsel, 0, 0, &counts); + end = counts.val; + + if ((end - start) < last) { + pr_err("invalid counter data: end=%llu start=%llu last= %llu\n", + end, start, last); + goto out; + } + last = end - start; + pr_debug("count = %llu\n", end - start); + } + ret = TEST_OK; + +out: + if (mapped) + perf_evsel__munmap(evsel); + if (opened) + perf_evsel__close(evsel); + perf_evsel__delete(evsel); + + perf_thread_map__put(threads); + return ret; +} + +static int test__mmap_user_read_instr(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + return test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS); +} + +static int test__mmap_user_read_cycles(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + return test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES); +} + static struct test_case tests__basic_mmap[] = { TEST_CASE_REASON("Read samples using the mmap interface", basic_mmap, "permissions"), + TEST_CASE_REASON("User space counter reading of instructions", + mmap_user_read_instr, +#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) + "permissions" +#else + "unsupported" +#endif + ), + TEST_CASE_REASON("User space counter reading of cycles", + mmap_user_read_cycles, +#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) + "permissions" +#else + "unsupported" +#endif + ), { .name = NULL, } }; struct test_suite suite__basic_mmap = { - .desc = "Read samples using the mmap interface", + .desc = "mmap interface tests", .test_cases = tests__basic_mmap, }; -- 2.36.1.255.ge46751e96f-goog