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1// SPDX-License-Identifier: GPL-2.0
2#include <errno.h>
3#include <inttypes.h>
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
15#define NR_LOOPS 10000000
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 */
22static 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;
28 char sbuf[STRERR_BUFSIZE];
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 };
40 struct cpu_map *cpus;
41 struct thread_map *threads;
42 struct perf_mmap *md;
43
44 attr.sample_freq = 500;
45
46 evlist = perf_evlist__new();
47 if (evlist == NULL) {
48 pr_debug("perf_evlist__new\n");
49 return -1;
50 }
51
52 evsel = perf_evsel__new(&attr);
53 if (evsel == NULL) {
54 pr_debug("perf_evsel__new\n");
55 goto out_delete_evlist;
56 }
57 perf_evlist__add(evlist, evsel);
58
59 cpus = cpu_map__dummy_new();
60 threads = thread_map__new_by_tid(getpid());
61 if (!cpus || !threads) {
62 err = -ENOMEM;
63 pr_debug("Not enough memory to create thread/cpu maps\n");
64 goto out_free_maps;
65 }
66
67 perf_evlist__set_maps(evlist, cpus, threads);
68
69 cpus = NULL;
70 threads = NULL;
71
72 if (perf_evlist__open(evlist)) {
73 const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate";
74
75 err = -errno;
76 pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n",
77 str_error_r(errno, sbuf, sizeof(sbuf)),
78 knob, (u64)attr.sample_freq);
79 goto out_delete_evlist;
80 }
81
82 err = perf_evlist__mmap(evlist, 128);
83 if (err < 0) {
84 pr_debug("failed to mmap event: %d (%s)\n", errno,
85 str_error_r(errno, sbuf, sizeof(sbuf)));
86 goto out_delete_evlist;
87 }
88
89 perf_evlist__enable(evlist);
90
91 /* collect samples */
92 for (i = 0; i < NR_LOOPS; i++)
93 tmp++;
94
95 perf_evlist__disable(evlist);
96
97 md = &evlist->mmap[0];
98 if (perf_mmap__read_init(md) < 0)
99 goto out_init;
100
101 while ((event = perf_mmap__read_event(md)) != NULL) {
102 struct perf_sample sample;
103
104 if (event->header.type != PERF_RECORD_SAMPLE)
105 goto next_event;
106
107 err = perf_evlist__parse_sample(evlist, event, &sample);
108 if (err < 0) {
109 pr_debug("Error during parse sample\n");
110 goto out_delete_evlist;
111 }
112
113 total_periods += sample.period;
114 nr_samples++;
115next_event:
116 perf_mmap__consume(md);
117 }
118 perf_mmap__read_done(md);
119
120out_init:
121 if ((u64) nr_samples == total_periods) {
122 pr_debug("All (%d) samples have period value of 1!\n",
123 nr_samples);
124 err = -1;
125 }
126
127out_free_maps:
128 cpu_map__put(cpus);
129 thread_map__put(threads);
130out_delete_evlist:
131 perf_evlist__delete(evlist);
132 return err;
133}
134
135int test__sw_clock_freq(struct test *test __maybe_unused, int subtest __maybe_unused)
136{
137 int ret;
138
139 ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK);
140 if (!ret)
141 ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK);
142
143 return ret;
144}
1// SPDX-License-Identifier: GPL-2.0
2#include <errno.h>
3#include <inttypes.h>
4#include <unistd.h>
5#include <stdlib.h>
6#include <signal.h>
7#include <sys/mman.h>
8#include <linux/string.h>
9
10#include "tests.h"
11#include "util/debug.h"
12#include "util/evsel.h"
13#include "util/evlist.h"
14#include "util/cpumap.h"
15#include "util/mmap.h"
16#include "util/thread_map.h"
17#include <perf/evlist.h>
18#include <perf/mmap.h>
19
20#define NR_LOOPS 10000000
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 */
27static 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;
33 char sbuf[STRERR_BUFSIZE];
34 union perf_event *event;
35 struct evsel *evsel;
36 struct evlist *evlist;
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 };
45 struct perf_cpu_map *cpus;
46 struct perf_thread_map *threads;
47 struct mmap *md;
48
49 attr.sample_freq = 500;
50
51 evlist = evlist__new();
52 if (evlist == NULL) {
53 pr_debug("evlist__new\n");
54 return -1;
55 }
56
57 evsel = evsel__new(&attr);
58 if (evsel == NULL) {
59 pr_debug("evsel__new\n");
60 goto out_delete_evlist;
61 }
62 evlist__add(evlist, evsel);
63
64 cpus = perf_cpu_map__dummy_new();
65 threads = thread_map__new_by_tid(getpid());
66 if (!cpus || !threads) {
67 err = -ENOMEM;
68 pr_debug("Not enough memory to create thread/cpu maps\n");
69 goto out_free_maps;
70 }
71
72 perf_evlist__set_maps(&evlist->core, cpus, threads);
73
74 cpus = NULL;
75 threads = NULL;
76
77 if (evlist__open(evlist)) {
78 const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate";
79
80 err = -errno;
81 pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n",
82 str_error_r(errno, sbuf, sizeof(sbuf)),
83 knob, (u64)attr.sample_freq);
84 goto out_delete_evlist;
85 }
86
87 err = evlist__mmap(evlist, 128);
88 if (err < 0) {
89 pr_debug("failed to mmap event: %d (%s)\n", errno,
90 str_error_r(errno, sbuf, sizeof(sbuf)));
91 goto out_delete_evlist;
92 }
93
94 evlist__enable(evlist);
95
96 /* collect samples */
97 for (i = 0; i < NR_LOOPS; i++)
98 tmp++;
99
100 evlist__disable(evlist);
101
102 md = &evlist->mmap[0];
103 if (perf_mmap__read_init(&md->core) < 0)
104 goto out_init;
105
106 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
107 struct perf_sample sample;
108
109 if (event->header.type != PERF_RECORD_SAMPLE)
110 goto next_event;
111
112 err = perf_evlist__parse_sample(evlist, event, &sample);
113 if (err < 0) {
114 pr_debug("Error during parse sample\n");
115 goto out_delete_evlist;
116 }
117
118 total_periods += sample.period;
119 nr_samples++;
120next_event:
121 perf_mmap__consume(&md->core);
122 }
123 perf_mmap__read_done(&md->core);
124
125out_init:
126 if ((u64) nr_samples == total_periods) {
127 pr_debug("All (%d) samples have period value of 1!\n",
128 nr_samples);
129 err = -1;
130 }
131
132out_free_maps:
133 perf_cpu_map__put(cpus);
134 perf_thread_map__put(threads);
135out_delete_evlist:
136 evlist__delete(evlist);
137 return err;
138}
139
140int test__sw_clock_freq(struct test *test __maybe_unused, int subtest __maybe_unused)
141{
142 int ret;
143
144 ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK);
145 if (!ret)
146 ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK);
147
148 return ret;
149}