Commit | Line | Data |
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3bd5a5fc | 1 | #include <stdio.h> |
3bd5a5fc | 2 | #include <unistd.h> |
d944c4ee | 3 | #include <linux/types.h> |
3bd5a5fc AH |
4 | #include <sys/prctl.h> |
5 | ||
6 | #include "parse-events.h" | |
7 | #include "evlist.h" | |
8 | #include "evsel.h" | |
9 | #include "thread_map.h" | |
10 | #include "cpumap.h" | |
0b437860 | 11 | #include "tsc.h" |
d8b167f9 MF |
12 | #include "tests/tests.h" |
13 | ||
14 | #include "arch-tests.h" | |
3bd5a5fc | 15 | |
3bd5a5fc AH |
16 | #define CHECK__(x) { \ |
17 | while ((x) < 0) { \ | |
18 | pr_debug(#x " failed!\n"); \ | |
19 | goto out_err; \ | |
20 | } \ | |
21 | } | |
22 | ||
23 | #define CHECK_NOT_NULL__(x) { \ | |
24 | while ((x) == NULL) { \ | |
25 | pr_debug(#x " failed!\n"); \ | |
26 | goto out_err; \ | |
27 | } \ | |
28 | } | |
29 | ||
3bd5a5fc AH |
30 | /** |
31 | * test__perf_time_to_tsc - test converting perf time to TSC. | |
32 | * | |
33 | * This function implements a test that checks that the conversion of perf time | |
34 | * to and from TSC is consistent with the order of events. If the test passes | |
35 | * %0 is returned, otherwise %-1 is returned. If TSC conversion is not | |
36 | * supported then then the test passes but " (not supported)" is printed. | |
37 | */ | |
721a1f53 | 38 | int test__perf_time_to_tsc(int subtest __maybe_unused) |
3bd5a5fc | 39 | { |
b4006796 | 40 | struct record_opts opts = { |
3bd5a5fc AH |
41 | .mmap_pages = UINT_MAX, |
42 | .user_freq = UINT_MAX, | |
43 | .user_interval = ULLONG_MAX, | |
3bd5a5fc AH |
44 | .target = { |
45 | .uses_mmap = true, | |
46 | }, | |
47 | .sample_time = true, | |
48 | }; | |
49 | struct thread_map *threads = NULL; | |
50 | struct cpu_map *cpus = NULL; | |
51 | struct perf_evlist *evlist = NULL; | |
52 | struct perf_evsel *evsel = NULL; | |
53 | int err = -1, ret, i; | |
54 | const char *comm1, *comm2; | |
55 | struct perf_tsc_conversion tc; | |
56 | struct perf_event_mmap_page *pc; | |
57 | union perf_event *event; | |
58 | u64 test_tsc, comm1_tsc, comm2_tsc; | |
59 | u64 test_time, comm1_time = 0, comm2_time = 0; | |
60 | ||
61 | threads = thread_map__new(-1, getpid(), UINT_MAX); | |
62 | CHECK_NOT_NULL__(threads); | |
63 | ||
64 | cpus = cpu_map__new(NULL); | |
65 | CHECK_NOT_NULL__(cpus); | |
66 | ||
67 | evlist = perf_evlist__new(); | |
68 | CHECK_NOT_NULL__(evlist); | |
69 | ||
70 | perf_evlist__set_maps(evlist, cpus, threads); | |
71 | ||
b39b8393 | 72 | CHECK__(parse_events(evlist, "cycles:u", NULL)); |
3bd5a5fc | 73 | |
e68ae9cf | 74 | perf_evlist__config(evlist, &opts, NULL); |
3bd5a5fc AH |
75 | |
76 | evsel = perf_evlist__first(evlist); | |
77 | ||
78 | evsel->attr.comm = 1; | |
79 | evsel->attr.disabled = 1; | |
80 | evsel->attr.enable_on_exec = 0; | |
81 | ||
82 | CHECK__(perf_evlist__open(evlist)); | |
83 | ||
84 | CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false)); | |
85 | ||
86 | pc = evlist->mmap[0].base; | |
87 | ret = perf_read_tsc_conversion(pc, &tc); | |
88 | if (ret) { | |
89 | if (ret == -EOPNOTSUPP) { | |
90 | fprintf(stderr, " (not supported)"); | |
91 | return 0; | |
92 | } | |
93 | goto out_err; | |
94 | } | |
95 | ||
96 | perf_evlist__enable(evlist); | |
97 | ||
98 | comm1 = "Test COMM 1"; | |
99 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm1, 0, 0, 0)); | |
100 | ||
101 | test_tsc = rdtsc(); | |
102 | ||
103 | comm2 = "Test COMM 2"; | |
104 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm2, 0, 0, 0)); | |
105 | ||
106 | perf_evlist__disable(evlist); | |
107 | ||
108 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
109 | while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) { | |
110 | struct perf_sample sample; | |
111 | ||
112 | if (event->header.type != PERF_RECORD_COMM || | |
113 | (pid_t)event->comm.pid != getpid() || | |
114 | (pid_t)event->comm.tid != getpid()) | |
8e50d384 | 115 | goto next_event; |
3bd5a5fc AH |
116 | |
117 | if (strcmp(event->comm.comm, comm1) == 0) { | |
118 | CHECK__(perf_evsel__parse_sample(evsel, event, | |
119 | &sample)); | |
120 | comm1_time = sample.time; | |
121 | } | |
122 | if (strcmp(event->comm.comm, comm2) == 0) { | |
123 | CHECK__(perf_evsel__parse_sample(evsel, event, | |
124 | &sample)); | |
125 | comm2_time = sample.time; | |
126 | } | |
8e50d384 ZZ |
127 | next_event: |
128 | perf_evlist__mmap_consume(evlist, i); | |
3bd5a5fc AH |
129 | } |
130 | } | |
131 | ||
132 | if (!comm1_time || !comm2_time) | |
133 | goto out_err; | |
134 | ||
135 | test_time = tsc_to_perf_time(test_tsc, &tc); | |
136 | comm1_tsc = perf_time_to_tsc(comm1_time, &tc); | |
137 | comm2_tsc = perf_time_to_tsc(comm2_time, &tc); | |
138 | ||
139 | pr_debug("1st event perf time %"PRIu64" tsc %"PRIu64"\n", | |
140 | comm1_time, comm1_tsc); | |
141 | pr_debug("rdtsc time %"PRIu64" tsc %"PRIu64"\n", | |
142 | test_time, test_tsc); | |
143 | pr_debug("2nd event perf time %"PRIu64" tsc %"PRIu64"\n", | |
144 | comm2_time, comm2_tsc); | |
145 | ||
146 | if (test_time <= comm1_time || | |
147 | test_time >= comm2_time) | |
148 | goto out_err; | |
149 | ||
150 | if (test_tsc <= comm1_tsc || | |
151 | test_tsc >= comm2_tsc) | |
152 | goto out_err; | |
153 | ||
154 | err = 0; | |
155 | ||
156 | out_err: | |
157 | if (evlist) { | |
158 | perf_evlist__disable(evlist); | |
3bd5a5fc AH |
159 | perf_evlist__delete(evlist); |
160 | } | |
3bd5a5fc AH |
161 | |
162 | return err; | |
163 | } |