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