Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Arnaldo Carvalho de Melo | a43783a | 2017-04-18 10:46:11 -0300 | [diff] [blame] | 2 | #include <errno.h> |
Arnaldo Carvalho de Melo | fd20e81 | 2017-04-17 15:23:08 -0300 | [diff] [blame] | 3 | #include <inttypes.h> |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 4 | #include <unistd.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <signal.h> |
| 7 | #include <sys/mman.h> |
| 8 | |
| 9 | #include "tests.h" |
| 10 | #include "util/evsel.h" |
| 11 | #include "util/evlist.h" |
| 12 | #include "util/cpumap.h" |
| 13 | #include "util/thread_map.h" |
| 14 | |
Adrian Hunter | 3fe2130 | 2013-11-12 11:45:21 -0300 | [diff] [blame] | 15 | #define NR_LOOPS 10000000 |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 16 | |
| 17 | /* |
| 18 | * This test will open software clock events (cpu-clock, task-clock) |
| 19 | * then check their frequency -> period conversion has no artifact of |
| 20 | * setting period to 1 forcefully. |
| 21 | */ |
| 22 | static int __test__sw_clock_freq(enum perf_sw_ids clock_id) |
| 23 | { |
| 24 | int i, err = -1; |
| 25 | volatile int tmp = 0; |
| 26 | u64 total_periods = 0; |
| 27 | int nr_samples = 0; |
Masami Hiramatsu | ba3dfff | 2014-08-14 02:22:45 +0000 | [diff] [blame] | 28 | char sbuf[STRERR_BUFSIZE]; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 29 | union perf_event *event; |
| 30 | struct perf_evsel *evsel; |
| 31 | struct perf_evlist *evlist; |
| 32 | struct perf_event_attr attr = { |
| 33 | .type = PERF_TYPE_SOFTWARE, |
| 34 | .config = clock_id, |
| 35 | .sample_type = PERF_SAMPLE_PERIOD, |
| 36 | .exclude_kernel = 1, |
| 37 | .disabled = 1, |
| 38 | .freq = 1, |
| 39 | }; |
Adrian Hunter | c5e6bd2 | 2015-09-08 10:59:02 +0300 | [diff] [blame] | 40 | struct cpu_map *cpus; |
| 41 | struct thread_map *threads; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 42 | |
Arnaldo Carvalho de Melo | 67c1e4a | 2013-11-11 16:33:18 -0300 | [diff] [blame] | 43 | attr.sample_freq = 500; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 44 | |
| 45 | evlist = perf_evlist__new(); |
| 46 | if (evlist == NULL) { |
| 47 | pr_debug("perf_evlist__new\n"); |
| 48 | return -1; |
| 49 | } |
| 50 | |
Arnaldo Carvalho de Melo | ef50383 | 2013-11-07 16:41:19 -0300 | [diff] [blame] | 51 | evsel = perf_evsel__new(&attr); |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 52 | if (evsel == NULL) { |
| 53 | pr_debug("perf_evsel__new\n"); |
Arnaldo Carvalho de Melo | 03ad974 | 2014-01-03 15:56:06 -0300 | [diff] [blame] | 54 | goto out_delete_evlist; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 55 | } |
| 56 | perf_evlist__add(evlist, evsel); |
| 57 | |
Adrian Hunter | c5e6bd2 | 2015-09-08 10:59:02 +0300 | [diff] [blame] | 58 | cpus = cpu_map__dummy_new(); |
| 59 | threads = thread_map__new_by_tid(getpid()); |
| 60 | if (!cpus || !threads) { |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 61 | err = -ENOMEM; |
| 62 | pr_debug("Not enough memory to create thread/cpu maps\n"); |
Adrian Hunter | c5e6bd2 | 2015-09-08 10:59:02 +0300 | [diff] [blame] | 63 | goto out_free_maps; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 64 | } |
| 65 | |
Adrian Hunter | c5e6bd2 | 2015-09-08 10:59:02 +0300 | [diff] [blame] | 66 | perf_evlist__set_maps(evlist, cpus, threads); |
| 67 | |
| 68 | cpus = NULL; |
| 69 | threads = NULL; |
| 70 | |
Arnaldo Carvalho de Melo | d0b849e | 2013-11-11 16:28:42 -0300 | [diff] [blame] | 71 | if (perf_evlist__open(evlist)) { |
Arnaldo Carvalho de Melo | 67c1e4a | 2013-11-11 16:33:18 -0300 | [diff] [blame] | 72 | const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate"; |
| 73 | |
Arnaldo Carvalho de Melo | d0b849e | 2013-11-11 16:28:42 -0300 | [diff] [blame] | 74 | err = -errno; |
Arnaldo Carvalho de Melo | 67c1e4a | 2013-11-11 16:33:18 -0300 | [diff] [blame] | 75 | pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n", |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 76 | str_error_r(errno, sbuf, sizeof(sbuf)), |
Masami Hiramatsu | ba3dfff | 2014-08-14 02:22:45 +0000 | [diff] [blame] | 77 | knob, (u64)attr.sample_freq); |
Arnaldo Carvalho de Melo | 03ad974 | 2014-01-03 15:56:06 -0300 | [diff] [blame] | 78 | goto out_delete_evlist; |
Arnaldo Carvalho de Melo | d0b849e | 2013-11-11 16:28:42 -0300 | [diff] [blame] | 79 | } |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 80 | |
| 81 | err = perf_evlist__mmap(evlist, 128, true); |
| 82 | if (err < 0) { |
| 83 | pr_debug("failed to mmap event: %d (%s)\n", errno, |
Arnaldo Carvalho de Melo | c8b5f2c | 2016-07-06 11:56:20 -0300 | [diff] [blame] | 84 | str_error_r(errno, sbuf, sizeof(sbuf))); |
Arnaldo Carvalho de Melo | f26e1c7 | 2014-01-03 16:54:12 -0300 | [diff] [blame] | 85 | goto out_delete_evlist; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | perf_evlist__enable(evlist); |
| 89 | |
| 90 | /* collect samples */ |
| 91 | for (i = 0; i < NR_LOOPS; i++) |
| 92 | tmp++; |
| 93 | |
| 94 | perf_evlist__disable(evlist); |
| 95 | |
| 96 | while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { |
| 97 | struct perf_sample sample; |
| 98 | |
| 99 | if (event->header.type != PERF_RECORD_SAMPLE) |
Zhouyi Zhou | 8e50d38 | 2013-10-24 15:43:33 +0800 | [diff] [blame] | 100 | goto next_event; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 101 | |
| 102 | err = perf_evlist__parse_sample(evlist, event, &sample); |
| 103 | if (err < 0) { |
| 104 | pr_debug("Error during parse sample\n"); |
Arnaldo Carvalho de Melo | 983874d | 2014-01-03 17:25:49 -0300 | [diff] [blame] | 105 | goto out_delete_evlist; |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | total_periods += sample.period; |
| 109 | nr_samples++; |
Zhouyi Zhou | 8e50d38 | 2013-10-24 15:43:33 +0800 | [diff] [blame] | 110 | next_event: |
| 111 | perf_evlist__mmap_consume(evlist, 0); |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | if ((u64) nr_samples == total_periods) { |
| 115 | pr_debug("All (%d) samples have period value of 1!\n", |
| 116 | nr_samples); |
| 117 | err = -1; |
| 118 | } |
| 119 | |
Adrian Hunter | c5e6bd2 | 2015-09-08 10:59:02 +0300 | [diff] [blame] | 120 | out_free_maps: |
| 121 | cpu_map__put(cpus); |
| 122 | thread_map__put(threads); |
Arnaldo Carvalho de Melo | 03ad974 | 2014-01-03 15:56:06 -0300 | [diff] [blame] | 123 | out_delete_evlist: |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 124 | perf_evlist__delete(evlist); |
| 125 | return err; |
| 126 | } |
| 127 | |
Arnaldo Carvalho de Melo | 81f17c9 | 2017-08-03 15:16:31 -0300 | [diff] [blame] | 128 | int test__sw_clock_freq(struct test *test __maybe_unused, int subtest __maybe_unused) |
Namhyung Kim | bc96b36 | 2013-03-18 11:41:47 +0900 | [diff] [blame] | 129 | { |
| 130 | int ret; |
| 131 | |
| 132 | ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK); |
| 133 | if (!ret) |
| 134 | ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK); |
| 135 | |
| 136 | return ret; |
| 137 | } |