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 BABA1C433EF for ; Thu, 9 Jun 2022 05:24:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238412AbiFIFY3 (ORCPT ); Thu, 9 Jun 2022 01:24:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238321AbiFIFYN (ORCPT ); Thu, 9 Jun 2022 01:24:13 -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 83C905FDA for ; Wed, 8 Jun 2022 22:24:11 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 10-20020a250d0a000000b0065ca0e7be90so19362378ybn.17 for ; Wed, 08 Jun 2022 22:24:11 -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=lb9q5Yv/NRSmWQ/bYz01a/1C1DKx+kQvVtIfEuSv0m8=; b=qaF4ArVQ5Ijgk1R5sedAyMQtN/PHxBZPjddPKT5shPniD6r9GsaYHQBs41nCGkkNuL SHeGn0BJokgDCtz1HiabL50GLDN9M66oSLJ0Cptw0pKhtcRozR9pcq5NlwCaipB6PQI1 BN3aPtREHhon32R+AKAjbVOY6MyuHU2QlgePTzJa43GC3ZOxSSF5w7soyhEImLmWxlKz 4vgCgVz7oVxq9kWTqcZKuaiSB9E22ifRjJjq/ES84kRBpS47/mCKRN1f+F8kKz+ef/r2 H5/m76I5fY5vbtPh82w0aCnWJ2wfsWWIoSzIa+do4QPri0HuWJK4ky021voryleXLPTP xEFQ== 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=lb9q5Yv/NRSmWQ/bYz01a/1C1DKx+kQvVtIfEuSv0m8=; b=yhy9EGvP/1X8yeIyQHAPHg7+xpyYNn9XQIa+Da4/HaZofi6iBWUEgtzq/6nrJljAZX I8oNOw9sj5GUgJd23AZIiU0tqX/LTbpCztZNc5XPEhFOUf6ZmmHxM5Ri7WDnB0Utna/b 8A55ln3gPcWDV4Z9NEAzYJpkNzEe1cmMlpk3x2EZMMS3kpBR//VZW6amxCYEGw1WRFZ9 qjBfMkLg/LuLkVFrhlHvwkjYRexVr9J2YPLhXdS4E8MJZ0+zs4VeLbtDcezo3yAZn+ri 7MXRCBsp2deiEAryPuB4m9oM2Pb6YUkghsVXKrnrbHOdtdpXfXDdqslILjQY3s+C7Y7C /YEw== X-Gm-Message-State: AOAM533PVE1Lioa6xwB6MH8STKJ5l6BIsrpbqKJEgcuJwjml0jI9lDY3 uxP6XW3ZXA8d/ijgnHzhEFbcV9POpaiO X-Google-Smtp-Source: ABdhPJyAqMlhCuxzMnoqvzbXCEIxUYUC+UEZoPwaqzgyUw3HKZqt3ckccIlBiudFoF39cskbid5mabc+fva+ X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:202:ae20:7578:fb21:976b]) (user=irogers job=sendgmr) by 2002:a0d:f443:0:b0:300:4795:fc0f with SMTP id d64-20020a0df443000000b003004795fc0fmr40154662ywf.354.1654752251112; Wed, 08 Jun 2022 22:24:11 -0700 (PDT) Date: Wed, 8 Jun 2022 22:23:55 -0700 In-Reply-To: <20220609052355.1300162-1-irogers@google.com> Message-Id: <20220609052355.1300162-5-irogers@google.com> Mime-Version: 1.0 References: <20220609052355.1300162-1-irogers@google.com> X-Mailer: git-send-email 2.36.1.255.ge46751e96f-goog Subject: [PATCH v2 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-perf-users@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 | 127 +++++++++++++++++++++++++++++++++- 1 file changed, 126 insertions(+), 1 deletion(-) diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c index 30bbe144648a..dfb6173b2a82 100644 --- a/tools/perf/tests/mmap-basic.c +++ b/tools/perf/tests/mmap-basic.c @@ -170,14 +170,139 @@ 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)); + 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