1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h> 2 #include <errno.h>
3 #include <inttypes.h> 3 #include <inttypes.h>
4 #include <unistd.h> 4 #include <unistd.h>
5 #include <stdlib.h> 5 #include <stdlib.h>
6 #include <signal.h> 6 #include <signal.h>
7 #include <sys/mman.h> 7 #include <sys/mman.h>
8 #include <linux/string.h> 8 #include <linux/string.h>
9 9
10 #include "tests.h" 10 #include "tests.h"
11 #include "util/debug.h" 11 #include "util/debug.h"
12 #include "util/evsel.h" 12 #include "util/evsel.h"
13 #include "util/evlist.h" 13 #include "util/evlist.h"
14 #include "util/cpumap.h" 14 #include "util/cpumap.h"
15 #include "util/mmap.h" 15 #include "util/mmap.h"
16 #include "util/sample.h" 16 #include "util/sample.h"
17 #include "util/thread_map.h" 17 #include "util/thread_map.h"
18 #include <perf/evlist.h> 18 #include <perf/evlist.h>
19 #include <perf/mmap.h> 19 #include <perf/mmap.h>
20 20
21 #define NR_LOOPS 10000000 21 #define NR_LOOPS 10000000
22 22
23 /* 23 /*
24 * This test will open software clock events ( 24 * This test will open software clock events (cpu-clock, task-clock)
25 * then check their frequency -> period conver 25 * then check their frequency -> period conversion has no artifact of
26 * setting period to 1 forcefully. 26 * setting period to 1 forcefully.
27 */ 27 */
28 static int __test__sw_clock_freq(enum perf_sw_ 28 static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
29 { 29 {
30 int i, err = -1; 30 int i, err = -1;
31 volatile int tmp = 0; 31 volatile int tmp = 0;
32 u64 total_periods = 0; 32 u64 total_periods = 0;
33 int nr_samples = 0; 33 int nr_samples = 0;
34 char sbuf[STRERR_BUFSIZE]; 34 char sbuf[STRERR_BUFSIZE];
35 union perf_event *event; 35 union perf_event *event;
36 struct evsel *evsel; 36 struct evsel *evsel;
37 struct evlist *evlist; 37 struct evlist *evlist;
38 struct perf_event_attr attr = { 38 struct perf_event_attr attr = {
39 .type = PERF_TYPE_SOFTWARE, 39 .type = PERF_TYPE_SOFTWARE,
40 .config = clock_id, 40 .config = clock_id,
41 .sample_type = PERF_SAMPLE_PER 41 .sample_type = PERF_SAMPLE_PERIOD,
42 .exclude_kernel = 1, 42 .exclude_kernel = 1,
43 .disabled = 1, 43 .disabled = 1,
44 .freq = 1, 44 .freq = 1,
45 }; 45 };
46 struct perf_cpu_map *cpus = NULL; 46 struct perf_cpu_map *cpus = NULL;
47 struct perf_thread_map *threads = NULL 47 struct perf_thread_map *threads = NULL;
48 struct mmap *md; 48 struct mmap *md;
49 49
50 attr.sample_freq = 500; 50 attr.sample_freq = 500;
51 51
52 evlist = evlist__new(); 52 evlist = evlist__new();
53 if (evlist == NULL) { 53 if (evlist == NULL) {
54 pr_debug("evlist__new\n"); 54 pr_debug("evlist__new\n");
55 return -1; 55 return -1;
56 } 56 }
57 57
58 evsel = evsel__new(&attr); 58 evsel = evsel__new(&attr);
59 if (evsel == NULL) { 59 if (evsel == NULL) {
60 pr_debug("evsel__new\n"); 60 pr_debug("evsel__new\n");
61 goto out_delete_evlist; 61 goto out_delete_evlist;
62 } 62 }
63 evlist__add(evlist, evsel); 63 evlist__add(evlist, evsel);
64 64
65 cpus = perf_cpu_map__new_any_cpu(); 65 cpus = perf_cpu_map__new_any_cpu();
66 threads = thread_map__new_by_tid(getpi 66 threads = thread_map__new_by_tid(getpid());
67 if (!cpus || !threads) { 67 if (!cpus || !threads) {
68 err = -ENOMEM; 68 err = -ENOMEM;
69 pr_debug("Not enough memory to 69 pr_debug("Not enough memory to create thread/cpu maps\n");
70 goto out_delete_evlist; 70 goto out_delete_evlist;
71 } 71 }
72 72
73 perf_evlist__set_maps(&evlist->core, c 73 perf_evlist__set_maps(&evlist->core, cpus, threads);
74 74
75 if (evlist__open(evlist)) { 75 if (evlist__open(evlist)) {
76 const char *knob = "/proc/sys/ 76 const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate";
77 77
78 err = -errno; 78 err = -errno;
79 pr_debug("Couldn't open evlist 79 pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n",
80 str_error_r(errno, sb 80 str_error_r(errno, sbuf, sizeof(sbuf)),
81 knob, (u64)attr.sampl 81 knob, (u64)attr.sample_freq);
82 goto out_delete_evlist; 82 goto out_delete_evlist;
83 } 83 }
84 84
85 err = evlist__mmap(evlist, 128); 85 err = evlist__mmap(evlist, 128);
86 if (err < 0) { 86 if (err < 0) {
87 pr_debug("failed to mmap event 87 pr_debug("failed to mmap event: %d (%s)\n", errno,
88 str_error_r(errno, sb 88 str_error_r(errno, sbuf, sizeof(sbuf)));
89 goto out_delete_evlist; 89 goto out_delete_evlist;
90 } 90 }
91 91
92 evlist__enable(evlist); 92 evlist__enable(evlist);
93 93
94 /* collect samples */ 94 /* collect samples */
95 for (i = 0; i < NR_LOOPS; i++) 95 for (i = 0; i < NR_LOOPS; i++)
96 tmp++; 96 tmp++;
97 97
98 evlist__disable(evlist); 98 evlist__disable(evlist);
99 99
100 md = &evlist->mmap[0]; 100 md = &evlist->mmap[0];
101 if (perf_mmap__read_init(&md->core) < 101 if (perf_mmap__read_init(&md->core) < 0)
102 goto out_init; 102 goto out_init;
103 103
104 while ((event = perf_mmap__read_event( 104 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
105 struct perf_sample sample; 105 struct perf_sample sample;
106 106
107 if (event->header.type != PERF 107 if (event->header.type != PERF_RECORD_SAMPLE)
108 goto next_event; 108 goto next_event;
109 109
110 err = evlist__parse_sample(evl 110 err = evlist__parse_sample(evlist, event, &sample);
111 if (err < 0) { 111 if (err < 0) {
112 pr_debug("Error during 112 pr_debug("Error during parse sample\n");
113 goto out_delete_evlist 113 goto out_delete_evlist;
114 } 114 }
115 115
116 total_periods += sample.period 116 total_periods += sample.period;
117 nr_samples++; 117 nr_samples++;
118 next_event: 118 next_event:
119 perf_mmap__consume(&md->core); 119 perf_mmap__consume(&md->core);
120 } 120 }
121 perf_mmap__read_done(&md->core); 121 perf_mmap__read_done(&md->core);
122 122
123 out_init: 123 out_init:
124 if ((u64) nr_samples == total_periods) 124 if ((u64) nr_samples == total_periods) {
125 pr_debug("All (%d) samples hav 125 pr_debug("All (%d) samples have period value of 1!\n",
126 nr_samples); 126 nr_samples);
127 err = -1; 127 err = -1;
128 } 128 }
129 129
130 out_delete_evlist: 130 out_delete_evlist:
131 perf_cpu_map__put(cpus); 131 perf_cpu_map__put(cpus);
132 perf_thread_map__put(threads); 132 perf_thread_map__put(threads);
133 evlist__delete(evlist); 133 evlist__delete(evlist);
134 return err; 134 return err;
135 } 135 }
136 136
137 static int test__sw_clock_freq(struct test_sui 137 static int test__sw_clock_freq(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
138 { 138 {
139 int ret; 139 int ret;
140 140
141 ret = __test__sw_clock_freq(PERF_COUNT 141 ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK);
142 if (!ret) 142 if (!ret)
143 ret = __test__sw_clock_freq(PE 143 ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK);
144 144
145 return ret; 145 return ret;
146 } 146 }
147 147
148 DEFINE_SUITE("Software clock events period val 148 DEFINE_SUITE("Software clock events period values", sw_clock_freq);
149 149
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