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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a43783ae | 2 | #include <errno.h> |
fd20e811 | 3 | #include <inttypes.h> |
3bd5a5fc | 4 | #include <stdio.h> |
3bd5a5fc | 5 | #include <unistd.h> |
d944c4ee | 6 | #include <linux/types.h> |
3bd5a5fc AH |
7 | #include <sys/prctl.h> |
8 | ||
9 | #include "parse-events.h" | |
10 | #include "evlist.h" | |
11 | #include "evsel.h" | |
12 | #include "thread_map.h" | |
13 | #include "cpumap.h" | |
0b437860 | 14 | #include "tsc.h" |
d8b167f9 MF |
15 | #include "tests/tests.h" |
16 | ||
17 | #include "arch-tests.h" | |
3bd5a5fc | 18 | |
3bd5a5fc AH |
19 | #define CHECK__(x) { \ |
20 | while ((x) < 0) { \ | |
21 | pr_debug(#x " failed!\n"); \ | |
22 | goto out_err; \ | |
23 | } \ | |
24 | } | |
25 | ||
26 | #define CHECK_NOT_NULL__(x) { \ | |
27 | while ((x) == NULL) { \ | |
28 | pr_debug(#x " failed!\n"); \ | |
29 | goto out_err; \ | |
30 | } \ | |
31 | } | |
32 | ||
3bd5a5fc AH |
33 | /** |
34 | * test__perf_time_to_tsc - test converting perf time to TSC. | |
35 | * | |
36 | * This function implements a test that checks that the conversion of perf time | |
37 | * to and from TSC is consistent with the order of events. If the test passes | |
38 | * %0 is returned, otherwise %-1 is returned. If TSC conversion is not | |
39 | * supported then then the test passes but " (not supported)" is printed. | |
40 | */ | |
81f17c90 | 41 | int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe_unused) |
3bd5a5fc | 42 | { |
b4006796 | 43 | struct record_opts opts = { |
3bd5a5fc AH |
44 | .mmap_pages = UINT_MAX, |
45 | .user_freq = UINT_MAX, | |
46 | .user_interval = ULLONG_MAX, | |
3bd5a5fc AH |
47 | .target = { |
48 | .uses_mmap = true, | |
49 | }, | |
50 | .sample_time = true, | |
51 | }; | |
52 | struct thread_map *threads = NULL; | |
53 | struct cpu_map *cpus = NULL; | |
54 | struct perf_evlist *evlist = NULL; | |
55 | struct perf_evsel *evsel = NULL; | |
56 | int err = -1, ret, i; | |
57 | const char *comm1, *comm2; | |
58 | struct perf_tsc_conversion tc; | |
59 | struct perf_event_mmap_page *pc; | |
60 | union perf_event *event; | |
61 | u64 test_tsc, comm1_tsc, comm2_tsc; | |
62 | u64 test_time, comm1_time = 0, comm2_time = 0; | |
63 | ||
64 | threads = thread_map__new(-1, getpid(), UINT_MAX); | |
65 | CHECK_NOT_NULL__(threads); | |
66 | ||
67 | cpus = cpu_map__new(NULL); | |
68 | CHECK_NOT_NULL__(cpus); | |
69 | ||
70 | evlist = perf_evlist__new(); | |
71 | CHECK_NOT_NULL__(evlist); | |
72 | ||
73 | perf_evlist__set_maps(evlist, cpus, threads); | |
74 | ||
b39b8393 | 75 | CHECK__(parse_events(evlist, "cycles:u", NULL)); |
3bd5a5fc | 76 | |
e68ae9cf | 77 | perf_evlist__config(evlist, &opts, NULL); |
3bd5a5fc AH |
78 | |
79 | evsel = perf_evlist__first(evlist); | |
80 | ||
81 | evsel->attr.comm = 1; | |
82 | evsel->attr.disabled = 1; | |
83 | evsel->attr.enable_on_exec = 0; | |
84 | ||
85 | CHECK__(perf_evlist__open(evlist)); | |
86 | ||
87 | CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false)); | |
88 | ||
89 | pc = evlist->mmap[0].base; | |
90 | ret = perf_read_tsc_conversion(pc, &tc); | |
91 | if (ret) { | |
92 | if (ret == -EOPNOTSUPP) { | |
93 | fprintf(stderr, " (not supported)"); | |
94 | return 0; | |
95 | } | |
96 | goto out_err; | |
97 | } | |
98 | ||
99 | perf_evlist__enable(evlist); | |
100 | ||
101 | comm1 = "Test COMM 1"; | |
102 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm1, 0, 0, 0)); | |
103 | ||
104 | test_tsc = rdtsc(); | |
105 | ||
106 | comm2 = "Test COMM 2"; | |
107 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm2, 0, 0, 0)); | |
108 | ||
109 | perf_evlist__disable(evlist); | |
110 | ||
111 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
112 | while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) { | |
113 | struct perf_sample sample; | |
114 | ||
115 | if (event->header.type != PERF_RECORD_COMM || | |
116 | (pid_t)event->comm.pid != getpid() || | |
117 | (pid_t)event->comm.tid != getpid()) | |
8e50d384 | 118 | goto next_event; |
3bd5a5fc AH |
119 | |
120 | if (strcmp(event->comm.comm, comm1) == 0) { | |
121 | CHECK__(perf_evsel__parse_sample(evsel, event, | |
122 | &sample)); | |
123 | comm1_time = sample.time; | |
124 | } | |
125 | if (strcmp(event->comm.comm, comm2) == 0) { | |
126 | CHECK__(perf_evsel__parse_sample(evsel, event, | |
127 | &sample)); | |
128 | comm2_time = sample.time; | |
129 | } | |
8e50d384 ZZ |
130 | next_event: |
131 | perf_evlist__mmap_consume(evlist, i); | |
3bd5a5fc AH |
132 | } |
133 | } | |
134 | ||
135 | if (!comm1_time || !comm2_time) | |
136 | goto out_err; | |
137 | ||
138 | test_time = tsc_to_perf_time(test_tsc, &tc); | |
139 | comm1_tsc = perf_time_to_tsc(comm1_time, &tc); | |
140 | comm2_tsc = perf_time_to_tsc(comm2_time, &tc); | |
141 | ||
142 | pr_debug("1st event perf time %"PRIu64" tsc %"PRIu64"\n", | |
143 | comm1_time, comm1_tsc); | |
144 | pr_debug("rdtsc time %"PRIu64" tsc %"PRIu64"\n", | |
145 | test_time, test_tsc); | |
146 | pr_debug("2nd event perf time %"PRIu64" tsc %"PRIu64"\n", | |
147 | comm2_time, comm2_tsc); | |
148 | ||
149 | if (test_time <= comm1_time || | |
150 | test_time >= comm2_time) | |
151 | goto out_err; | |
152 | ||
153 | if (test_tsc <= comm1_tsc || | |
154 | test_tsc >= comm2_tsc) | |
155 | goto out_err; | |
156 | ||
157 | err = 0; | |
158 | ||
159 | out_err: | |
61b3f66a | 160 | perf_evlist__delete(evlist); |
3bd5a5fc AH |
161 | return err; |
162 | } |