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 #include "tests.h"
10
libperf_print(enum libperf_print_level level,const char * fmt,va_list ap)11 static int libperf_print(enum libperf_print_level level,
12 const char *fmt, va_list ap)
13 {
14 return vfprintf(stderr, fmt, ap);
15 }
16
test_stat_cpu(void)17 static int test_stat_cpu(void)
18 {
19 struct perf_cpu_map *cpus;
20 struct perf_evsel *evsel;
21 struct perf_event_attr attr = {
22 .type = PERF_TYPE_SOFTWARE,
23 .config = PERF_COUNT_SW_CPU_CLOCK,
24 };
25 int err, idx;
26
27 cpus = perf_cpu_map__new(NULL);
28 __T("failed to create cpus", cpus);
29
30 evsel = perf_evsel__new(&attr);
31 __T("failed to create evsel", evsel);
32
33 err = perf_evsel__open(evsel, cpus, NULL);
34 __T("failed to open evsel", err == 0);
35
36 for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) {
37 struct perf_counts_values counts = { .val = 0 };
38
39 perf_evsel__read(evsel, idx, 0, &counts);
40 __T("failed to read value for evsel", counts.val != 0);
41 }
42
43 perf_evsel__close(evsel);
44 perf_evsel__delete(evsel);
45
46 perf_cpu_map__put(cpus);
47 return 0;
48 }
49
test_stat_thread(void)50 static int test_stat_thread(void)
51 {
52 struct perf_counts_values counts = { .val = 0 };
53 struct perf_thread_map *threads;
54 struct perf_evsel *evsel;
55 struct perf_event_attr attr = {
56 .type = PERF_TYPE_SOFTWARE,
57 .config = PERF_COUNT_SW_TASK_CLOCK,
58 };
59 int err;
60
61 threads = perf_thread_map__new_dummy();
62 __T("failed to create threads", threads);
63
64 perf_thread_map__set_pid(threads, 0, 0);
65
66 evsel = perf_evsel__new(&attr);
67 __T("failed to create evsel", evsel);
68
69 err = perf_evsel__open(evsel, NULL, threads);
70 __T("failed to open evsel", err == 0);
71
72 perf_evsel__read(evsel, 0, 0, &counts);
73 __T("failed to read value for evsel", counts.val != 0);
74
75 perf_evsel__close(evsel);
76 perf_evsel__delete(evsel);
77
78 perf_thread_map__put(threads);
79 return 0;
80 }
81
test_stat_thread_enable(void)82 static int test_stat_thread_enable(void)
83 {
84 struct perf_counts_values counts = { .val = 0 };
85 struct perf_thread_map *threads;
86 struct perf_evsel *evsel;
87 struct perf_event_attr attr = {
88 .type = PERF_TYPE_SOFTWARE,
89 .config = PERF_COUNT_SW_TASK_CLOCK,
90 .disabled = 1,
91 };
92 int err;
93
94 threads = perf_thread_map__new_dummy();
95 __T("failed to create threads", threads);
96
97 perf_thread_map__set_pid(threads, 0, 0);
98
99 evsel = perf_evsel__new(&attr);
100 __T("failed to create evsel", evsel);
101
102 err = perf_evsel__open(evsel, NULL, threads);
103 __T("failed to open evsel", err == 0);
104
105 perf_evsel__read(evsel, 0, 0, &counts);
106 __T("failed to read value for evsel", counts.val == 0);
107
108 err = perf_evsel__enable(evsel);
109 __T("failed to enable evsel", err == 0);
110
111 perf_evsel__read(evsel, 0, 0, &counts);
112 __T("failed to read value for evsel", counts.val != 0);
113
114 err = perf_evsel__disable(evsel);
115 __T("failed to enable evsel", err == 0);
116
117 perf_evsel__close(evsel);
118 perf_evsel__delete(evsel);
119
120 perf_thread_map__put(threads);
121 return 0;
122 }
123
test_stat_user_read(int event)124 static int test_stat_user_read(int event)
125 {
126 struct perf_counts_values counts = { .val = 0 };
127 struct perf_thread_map *threads;
128 struct perf_evsel *evsel;
129 struct perf_event_mmap_page *pc;
130 struct perf_event_attr attr = {
131 .type = PERF_TYPE_HARDWARE,
132 .config = event,
133 };
134 int err, i;
135
136 threads = perf_thread_map__new_dummy();
137 __T("failed to create threads", threads);
138
139 perf_thread_map__set_pid(threads, 0, 0);
140
141 evsel = perf_evsel__new(&attr);
142 __T("failed to create evsel", evsel);
143
144 err = perf_evsel__open(evsel, NULL, threads);
145 __T("failed to open evsel", err == 0);
146
147 err = perf_evsel__mmap(evsel, 0);
148 __T("failed to mmap evsel", err == 0);
149
150 pc = perf_evsel__mmap_base(evsel, 0, 0);
151 __T("failed to get mmapped address", pc);
152
153 #if defined(__i386__) || defined(__x86_64__)
154 __T("userspace counter access not supported", pc->cap_user_rdpmc);
155 __T("userspace counter access not enabled", pc->index);
156 __T("userspace counter width not set", pc->pmc_width >= 32);
157 #endif
158
159 perf_evsel__read(evsel, 0, 0, &counts);
160 __T("failed to read value for evsel", counts.val != 0);
161
162 for (i = 0; i < 5; i++) {
163 volatile int count = 0x10000 << i;
164 __u64 start, end, last = 0;
165
166 __T_VERBOSE("\tloop = %u, ", count);
167
168 perf_evsel__read(evsel, 0, 0, &counts);
169 start = counts.val;
170
171 while (count--) ;
172
173 perf_evsel__read(evsel, 0, 0, &counts);
174 end = counts.val;
175
176 __T("invalid counter data", (end - start) > last);
177 last = end - start;
178 __T_VERBOSE("count = %llu\n", end - start);
179 }
180
181 perf_evsel__munmap(evsel);
182 perf_evsel__close(evsel);
183 perf_evsel__delete(evsel);
184
185 perf_thread_map__put(threads);
186 return 0;
187 }
188
test_evsel(int argc,char ** argv)189 int test_evsel(int argc, char **argv)
190 {
191 __T_START;
192
193 libperf_init(libperf_print);
194
195 test_stat_cpu();
196 test_stat_thread();
197 test_stat_thread_enable();
198 test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS);
199 test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES);
200
201 __T_END;
202 return tests_failed == 0 ? 0 : -1;
203 }
204