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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 | }; | |
9749b90e | 52 | struct perf_thread_map *threads = NULL; |
f854839b | 53 | struct perf_cpu_map *cpus = NULL; |
63503dba | 54 | struct evlist *evlist = NULL; |
32dcd021 | 55 | struct evsel *evsel = NULL; |
3bd5a5fc AH |
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; | |
9dfb85df | 63 | struct perf_mmap *md; |
3bd5a5fc AH |
64 | |
65 | threads = thread_map__new(-1, getpid(), UINT_MAX); | |
66 | CHECK_NOT_NULL__(threads); | |
67 | ||
68 | cpus = cpu_map__new(NULL); | |
69 | CHECK_NOT_NULL__(cpus); | |
70 | ||
71 | evlist = perf_evlist__new(); | |
72 | CHECK_NOT_NULL__(evlist); | |
73 | ||
74 | perf_evlist__set_maps(evlist, cpus, threads); | |
75 | ||
b39b8393 | 76 | CHECK__(parse_events(evlist, "cycles:u", NULL)); |
3bd5a5fc | 77 | |
e68ae9cf | 78 | perf_evlist__config(evlist, &opts, NULL); |
3bd5a5fc AH |
79 | |
80 | evsel = perf_evlist__first(evlist); | |
81 | ||
82 | evsel->attr.comm = 1; | |
83 | evsel->attr.disabled = 1; | |
84 | evsel->attr.enable_on_exec = 0; | |
85 | ||
86 | CHECK__(perf_evlist__open(evlist)); | |
87 | ||
f74b9d3a | 88 | CHECK__(perf_evlist__mmap(evlist, UINT_MAX)); |
3bd5a5fc AH |
89 | |
90 | pc = evlist->mmap[0].base; | |
91 | ret = perf_read_tsc_conversion(pc, &tc); | |
92 | if (ret) { | |
93 | if (ret == -EOPNOTSUPP) { | |
94 | fprintf(stderr, " (not supported)"); | |
95 | return 0; | |
96 | } | |
97 | goto out_err; | |
98 | } | |
99 | ||
100 | perf_evlist__enable(evlist); | |
101 | ||
102 | comm1 = "Test COMM 1"; | |
103 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm1, 0, 0, 0)); | |
104 | ||
105 | test_tsc = rdtsc(); | |
106 | ||
107 | comm2 = "Test COMM 2"; | |
108 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm2, 0, 0, 0)); | |
109 | ||
110 | perf_evlist__disable(evlist); | |
111 | ||
112 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
9dfb85df | 113 | md = &evlist->mmap[i]; |
b9bae2c8 | 114 | if (perf_mmap__read_init(md) < 0) |
9dfb85df KL |
115 | continue; |
116 | ||
0019dc87 | 117 | while ((event = perf_mmap__read_event(md)) != NULL) { |
3bd5a5fc AH |
118 | struct perf_sample sample; |
119 | ||
120 | if (event->header.type != PERF_RECORD_COMM || | |
121 | (pid_t)event->comm.pid != getpid() || | |
122 | (pid_t)event->comm.tid != getpid()) | |
8e50d384 | 123 | goto next_event; |
3bd5a5fc AH |
124 | |
125 | if (strcmp(event->comm.comm, comm1) == 0) { | |
126 | CHECK__(perf_evsel__parse_sample(evsel, event, | |
127 | &sample)); | |
128 | comm1_time = sample.time; | |
129 | } | |
130 | if (strcmp(event->comm.comm, comm2) == 0) { | |
131 | CHECK__(perf_evsel__parse_sample(evsel, event, | |
132 | &sample)); | |
133 | comm2_time = sample.time; | |
134 | } | |
8e50d384 | 135 | next_event: |
d6ace3df | 136 | perf_mmap__consume(md); |
3bd5a5fc | 137 | } |
9dfb85df | 138 | perf_mmap__read_done(md); |
3bd5a5fc AH |
139 | } |
140 | ||
141 | if (!comm1_time || !comm2_time) | |
142 | goto out_err; | |
143 | ||
144 | test_time = tsc_to_perf_time(test_tsc, &tc); | |
145 | comm1_tsc = perf_time_to_tsc(comm1_time, &tc); | |
146 | comm2_tsc = perf_time_to_tsc(comm2_time, &tc); | |
147 | ||
148 | pr_debug("1st event perf time %"PRIu64" tsc %"PRIu64"\n", | |
149 | comm1_time, comm1_tsc); | |
150 | pr_debug("rdtsc time %"PRIu64" tsc %"PRIu64"\n", | |
151 | test_time, test_tsc); | |
152 | pr_debug("2nd event perf time %"PRIu64" tsc %"PRIu64"\n", | |
153 | comm2_time, comm2_tsc); | |
154 | ||
155 | if (test_time <= comm1_time || | |
156 | test_time >= comm2_time) | |
157 | goto out_err; | |
158 | ||
159 | if (test_tsc <= comm1_tsc || | |
160 | test_tsc >= comm2_tsc) | |
161 | goto out_err; | |
162 | ||
163 | err = 0; | |
164 | ||
165 | out_err: | |
61b3f66a | 166 | perf_evlist__delete(evlist); |
3bd5a5fc AH |
167 | return err; |
168 | } |