Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a43783ae | 2 | #include <errno.h> |
fd20e811 | 3 | #include <inttypes.h> |
bc96b361 NK |
4 | #include <unistd.h> |
5 | #include <stdlib.h> | |
6 | #include <signal.h> | |
7 | #include <sys/mman.h> | |
b4209025 | 8 | #include <linux/string.h> |
bc96b361 NK |
9 | |
10 | #include "tests.h" | |
b4209025 | 11 | #include "util/debug.h" |
bc96b361 NK |
12 | #include "util/evsel.h" |
13 | #include "util/evlist.h" | |
14 | #include "util/cpumap.h" | |
e0fcfb08 | 15 | #include "util/mmap.h" |
9823147d | 16 | #include "util/sample.h" |
bc96b361 | 17 | #include "util/thread_map.h" |
453fa030 | 18 | #include <perf/evlist.h> |
7728fa0c | 19 | #include <perf/mmap.h> |
bc96b361 | 20 | |
3fe21305 | 21 | #define NR_LOOPS 10000000 |
bc96b361 NK |
22 | |
23 | /* | |
24 | * This test will open software clock events (cpu-clock, task-clock) | |
25 | * then check their frequency -> period conversion has no artifact of | |
26 | * setting period to 1 forcefully. | |
27 | */ | |
28 | static int __test__sw_clock_freq(enum perf_sw_ids clock_id) | |
29 | { | |
30 | int i, err = -1; | |
31 | volatile int tmp = 0; | |
32 | u64 total_periods = 0; | |
33 | int nr_samples = 0; | |
ba3dfff8 | 34 | char sbuf[STRERR_BUFSIZE]; |
bc96b361 | 35 | union perf_event *event; |
32dcd021 | 36 | struct evsel *evsel; |
63503dba | 37 | struct evlist *evlist; |
bc96b361 NK |
38 | struct perf_event_attr attr = { |
39 | .type = PERF_TYPE_SOFTWARE, | |
40 | .config = clock_id, | |
41 | .sample_type = PERF_SAMPLE_PERIOD, | |
42 | .exclude_kernel = 1, | |
43 | .disabled = 1, | |
44 | .freq = 1, | |
45 | }; | |
97ab7c52 NK |
46 | struct perf_cpu_map *cpus = NULL; |
47 | struct perf_thread_map *threads = NULL; | |
a5830532 | 48 | struct mmap *md; |
bc96b361 | 49 | |
67c1e4a5 | 50 | attr.sample_freq = 500; |
bc96b361 | 51 | |
0f98b11c | 52 | evlist = evlist__new(); |
bc96b361 | 53 | if (evlist == NULL) { |
0f98b11c | 54 | pr_debug("evlist__new\n"); |
bc96b361 NK |
55 | return -1; |
56 | } | |
57 | ||
365c3ae7 | 58 | evsel = evsel__new(&attr); |
bc96b361 | 59 | if (evsel == NULL) { |
8f6725a2 | 60 | pr_debug("evsel__new\n"); |
03ad9747 | 61 | goto out_delete_evlist; |
bc96b361 | 62 | } |
a1cf3a75 | 63 | evlist__add(evlist, evsel); |
bc96b361 | 64 | |
397721e0 | 65 | cpus = perf_cpu_map__dummy_new(); |
c5e6bd2e AH |
66 | threads = thread_map__new_by_tid(getpid()); |
67 | if (!cpus || !threads) { | |
bc96b361 NK |
68 | err = -ENOMEM; |
69 | pr_debug("Not enough memory to create thread/cpu maps\n"); | |
97ab7c52 | 70 | goto out_delete_evlist; |
bc96b361 NK |
71 | } |
72 | ||
453fa030 | 73 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
c5e6bd2e | 74 | |
474ddc4c | 75 | if (evlist__open(evlist)) { |
67c1e4a5 ACM |
76 | const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate"; |
77 | ||
d0b849e9 | 78 | err = -errno; |
67c1e4a5 | 79 | pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n", |
c8b5f2c9 | 80 | str_error_r(errno, sbuf, sizeof(sbuf)), |
ba3dfff8 | 81 | knob, (u64)attr.sample_freq); |
03ad9747 | 82 | goto out_delete_evlist; |
d0b849e9 | 83 | } |
bc96b361 | 84 | |
9521b5f2 | 85 | err = evlist__mmap(evlist, 128); |
bc96b361 NK |
86 | if (err < 0) { |
87 | pr_debug("failed to mmap event: %d (%s)\n", errno, | |
c8b5f2c9 | 88 | str_error_r(errno, sbuf, sizeof(sbuf))); |
f26e1c7c | 89 | goto out_delete_evlist; |
bc96b361 NK |
90 | } |
91 | ||
1c87f165 | 92 | evlist__enable(evlist); |
bc96b361 NK |
93 | |
94 | /* collect samples */ | |
95 | for (i = 0; i < NR_LOOPS; i++) | |
96 | tmp++; | |
97 | ||
e74676de | 98 | evlist__disable(evlist); |
bc96b361 | 99 | |
5d0007cd | 100 | md = &evlist->mmap[0]; |
7c4d4182 | 101 | if (perf_mmap__read_init(&md->core) < 0) |
5d0007cd KL |
102 | goto out_init; |
103 | ||
151ed5d7 | 104 | while ((event = perf_mmap__read_event(&md->core)) != NULL) { |
bc96b361 NK |
105 | struct perf_sample sample; |
106 | ||
107 | if (event->header.type != PERF_RECORD_SAMPLE) | |
8e50d384 | 108 | goto next_event; |
bc96b361 | 109 | |
2a6599cd | 110 | err = evlist__parse_sample(evlist, event, &sample); |
bc96b361 NK |
111 | if (err < 0) { |
112 | pr_debug("Error during parse sample\n"); | |
983874d1 | 113 | goto out_delete_evlist; |
bc96b361 NK |
114 | } |
115 | ||
116 | total_periods += sample.period; | |
117 | nr_samples++; | |
8e50d384 | 118 | next_event: |
7728fa0c | 119 | perf_mmap__consume(&md->core); |
bc96b361 | 120 | } |
32fdc2ca | 121 | perf_mmap__read_done(&md->core); |
bc96b361 | 122 | |
5d0007cd | 123 | out_init: |
bc96b361 NK |
124 | if ((u64) nr_samples == total_periods) { |
125 | pr_debug("All (%d) samples have period value of 1!\n", | |
126 | nr_samples); | |
127 | err = -1; | |
128 | } | |
129 | ||
97ab7c52 | 130 | out_delete_evlist: |
38f01d8d | 131 | perf_cpu_map__put(cpus); |
7836e52e | 132 | perf_thread_map__put(threads); |
c12995a5 | 133 | evlist__delete(evlist); |
bc96b361 NK |
134 | return err; |
135 | } | |
136 | ||
33f44bfd | 137 | static int test__sw_clock_freq(struct test_suite *test __maybe_unused, int subtest __maybe_unused) |
bc96b361 NK |
138 | { |
139 | int ret; | |
140 | ||
141 | ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK); | |
142 | if (!ret) | |
143 | ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK); | |
144 | ||
145 | return ret; | |
146 | } | |
d68f0365 IR |
147 | |
148 | DEFINE_SUITE("Software clock events period values", sw_clock_freq); |