1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdarg.h>
3 #include <stdio.h>
4 #include <linux/perf_event.h>
5 #include <perf/cpumap.h>
6 #include <perf/threadmap.h>
7 #include <perf/evsel.h>
8 #include <internal/tests.h>
9
libperf_print(enum libperf_print_level level,const char * fmt,va_list ap)10 static int libperf_print(enum libperf_print_level level,
11 const char *fmt, va_list ap)
12 {
13 return vfprintf(stderr, fmt, ap);
14 }
15
test_stat_cpu(void)16 static int test_stat_cpu(void)
17 {
18 struct perf_cpu_map *cpus;
19 struct perf_evsel *evsel;
20 struct perf_event_attr attr = {
21 .type = PERF_TYPE_SOFTWARE,
22 .config = PERF_COUNT_SW_CPU_CLOCK,
23 };
24 int err, cpu, tmp;
25
26 cpus = perf_cpu_map__new(NULL);
27 __T("failed to create cpus", cpus);
28
29 evsel = perf_evsel__new(&attr);
30 __T("failed to create evsel", evsel);
31
32 err = perf_evsel__open(evsel, cpus, NULL);
33 __T("failed to open evsel", err == 0);
34
35 perf_cpu_map__for_each_cpu(cpu, tmp, cpus) {
36 struct perf_counts_values counts = { .val = 0 };
37
38 perf_evsel__read(evsel, cpu, 0, &counts);
39 __T("failed to read value for evsel", counts.val != 0);
40 }
41
42 perf_evsel__close(evsel);
43 perf_evsel__delete(evsel);
44
45 perf_cpu_map__put(cpus);
46 return 0;
47 }
48
test_stat_thread(void)49 static int test_stat_thread(void)
50 {
51 struct perf_counts_values counts = { .val = 0 };
52 struct perf_thread_map *threads;
53 struct perf_evsel *evsel;
54 struct perf_event_attr attr = {
55 .type = PERF_TYPE_SOFTWARE,
56 .config = PERF_COUNT_SW_TASK_CLOCK,
57 };
58 int err;
59
60 threads = perf_thread_map__new_dummy();
61 __T("failed to create threads", threads);
62
63 perf_thread_map__set_pid(threads, 0, 0);
64
65 evsel = perf_evsel__new(&attr);
66 __T("failed to create evsel", evsel);
67
68 err = perf_evsel__open(evsel, NULL, threads);
69 __T("failed to open evsel", err == 0);
70
71 perf_evsel__read(evsel, 0, 0, &counts);
72 __T("failed to read value for evsel", counts.val != 0);
73
74 perf_evsel__close(evsel);
75 perf_evsel__delete(evsel);
76
77 perf_thread_map__put(threads);
78 return 0;
79 }
80
test_stat_thread_enable(void)81 static int test_stat_thread_enable(void)
82 {
83 struct perf_counts_values counts = { .val = 0 };
84 struct perf_thread_map *threads;
85 struct perf_evsel *evsel;
86 struct perf_event_attr attr = {
87 .type = PERF_TYPE_SOFTWARE,
88 .config = PERF_COUNT_SW_TASK_CLOCK,
89 .disabled = 1,
90 };
91 int err;
92
93 threads = perf_thread_map__new_dummy();
94 __T("failed to create threads", threads);
95
96 perf_thread_map__set_pid(threads, 0, 0);
97
98 evsel = perf_evsel__new(&attr);
99 __T("failed to create evsel", evsel);
100
101 err = perf_evsel__open(evsel, NULL, threads);
102 __T("failed to open evsel", err == 0);
103
104 perf_evsel__read(evsel, 0, 0, &counts);
105 __T("failed to read value for evsel", counts.val == 0);
106
107 err = perf_evsel__enable(evsel);
108 __T("failed to enable evsel", err == 0);
109
110 perf_evsel__read(evsel, 0, 0, &counts);
111 __T("failed to read value for evsel", counts.val != 0);
112
113 err = perf_evsel__disable(evsel);
114 __T("failed to enable evsel", err == 0);
115
116 perf_evsel__close(evsel);
117 perf_evsel__delete(evsel);
118
119 perf_thread_map__put(threads);
120 return 0;
121 }
122
test_stat_user_read(int event)123 static int test_stat_user_read(int event)
124 {
125 struct perf_counts_values counts = { .val = 0 };
126 struct perf_thread_map *threads;
127 struct perf_evsel *evsel;
128 struct perf_event_mmap_page *pc;
129 struct perf_event_attr attr = {
130 .type = PERF_TYPE_HARDWARE,
131 .config = event,
132 };
133 int err, i;
134
135 threads = perf_thread_map__new_dummy();
136 __T("failed to create threads", threads);
137
138 perf_thread_map__set_pid(threads, 0, 0);
139
140 evsel = perf_evsel__new(&attr);
141 __T("failed to create evsel", evsel);
142
143 err = perf_evsel__open(evsel, NULL, threads);
144 __T("failed to open evsel", err == 0);
145
146 err = perf_evsel__mmap(evsel, 0);
147 __T("failed to mmap evsel", err == 0);
148
149 pc = perf_evsel__mmap_base(evsel, 0, 0);
150
151 #if defined(__i386__) || defined(__x86_64__)
152 __T("userspace counter access not supported", pc->cap_user_rdpmc);
153 __T("userspace counter access not enabled", pc->index);
154 __T("userspace counter width not set", pc->pmc_width >= 32);
155 #endif
156
157 perf_evsel__read(evsel, 0, 0, &counts);
158 __T("failed to read value for evsel", counts.val != 0);
159
160 for (i = 0; i < 5; i++) {
161 volatile int count = 0x10000 << i;
162 __u64 start, end, last = 0;
163
164 __T_VERBOSE("\tloop = %u, ", count);
165
166 perf_evsel__read(evsel, 0, 0, &counts);
167 start = counts.val;
168
169 while (count--) ;
170
171 perf_evsel__read(evsel, 0, 0, &counts);
172 end = counts.val;
173
174 __T("invalid counter data", (end - start) > last);
175 last = end - start;
176 __T_VERBOSE("count = %llu\n", end - start);
177 }
178
179 perf_evsel__munmap(evsel);
180 perf_evsel__close(evsel);
181 perf_evsel__delete(evsel);
182
183 perf_thread_map__put(threads);
184 return 0;
185 }
186
main(int argc,char ** argv)187 int main(int argc, char **argv)
188 {
189 __T_START;
190
191 libperf_init(libperf_print);
192
193 test_stat_cpu();
194 test_stat_thread();
195 test_stat_thread_enable();
196 test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS);
197 test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES);
198
199 __T_END;
200 return tests_failed == 0 ? 0 : -1;
201 }
202