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