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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b4209025 | 2 | #include "debug.h" |
d723a550 NK |
3 | #include "evlist.h" |
4 | #include "evsel.h" | |
aeb00b1a | 5 | #include "target.h" |
d723a550 | 6 | #include "thread_map.h" |
d723a550 | 7 | #include "tests.h" |
e0fcfb08 | 8 | #include "util/mmap.h" |
d723a550 | 9 | |
a43783ae | 10 | #include <errno.h> |
d723a550 | 11 | #include <signal.h> |
8520a98d | 12 | #include <linux/string.h> |
87ffb6c6 | 13 | #include <perf/cpumap.h> |
453fa030 | 14 | #include <perf/evlist.h> |
7728fa0c | 15 | #include <perf/mmap.h> |
d723a550 NK |
16 | |
17 | static int exited; | |
18 | static int nr_exit; | |
19 | ||
735f7e0b | 20 | static void sig_handler(int sig __maybe_unused) |
d723a550 NK |
21 | { |
22 | exited = 1; | |
735f7e0b | 23 | } |
d723a550 | 24 | |
735f7e0b | 25 | /* |
7b392ef0 | 26 | * evlist__prepare_workload will send a SIGUSR1 if the fork fails, since |
735f7e0b ACM |
27 | * we asked by setting its exec_error to this handler. |
28 | */ | |
29 | static void workload_exec_failed_signal(int signo __maybe_unused, | |
30 | siginfo_t *info __maybe_unused, | |
31 | void *ucontext __maybe_unused) | |
32 | { | |
33 | exited = 1; | |
34 | nr_exit = -1; | |
d723a550 NK |
35 | } |
36 | ||
37 | /* | |
38 | * This test will start a workload that does nothing then it checks | |
39 | * if the number of exit event reported by the kernel is 1 or not | |
40 | * in order to check the kernel returns correct number of event. | |
41 | */ | |
33f44bfd | 42 | static int test__task_exit(struct test_suite *test __maybe_unused, int subtest __maybe_unused) |
d723a550 NK |
43 | { |
44 | int err = -1; | |
45 | union perf_event *event; | |
32dcd021 | 46 | struct evsel *evsel; |
63503dba | 47 | struct evlist *evlist; |
602ad878 | 48 | struct target target = { |
d723a550 NK |
49 | .uid = UINT_MAX, |
50 | .uses_mmap = true, | |
51 | }; | |
52 | const char *argv[] = { "true", NULL }; | |
ba3dfff8 | 53 | char sbuf[STRERR_BUFSIZE]; |
f854839b | 54 | struct perf_cpu_map *cpus; |
9749b90e | 55 | struct perf_thread_map *threads; |
a5830532 | 56 | struct mmap *md; |
791ce9c4 | 57 | int retry_count = 0; |
d723a550 NK |
58 | |
59 | signal(SIGCHLD, sig_handler); | |
d723a550 | 60 | |
2480232c | 61 | evlist = evlist__new_dummy(); |
d723a550 | 62 | if (evlist == NULL) { |
2480232c | 63 | pr_debug("evlist__new_dummy\n"); |
d723a550 NK |
64 | return -1; |
65 | } | |
d723a550 NK |
66 | |
67 | /* | |
68 | * Create maps of threads and cpus to monitor. In this case | |
69 | * we start with all threads and cpus (-1, -1) but then in | |
7b392ef0 | 70 | * evlist__prepare_workload we'll fill in the only thread |
d723a550 NK |
71 | * we're monitoring, the one forked there. |
72 | */ | |
48219b08 | 73 | cpus = perf_cpu_map__new_any_cpu(); |
29982722 AH |
74 | threads = thread_map__new_by_tid(-1); |
75 | if (!cpus || !threads) { | |
d723a550 NK |
76 | err = -ENOMEM; |
77 | pr_debug("Not enough memory to create thread/cpu maps\n"); | |
83d25ccd | 78 | goto out_delete_evlist; |
d723a550 NK |
79 | } |
80 | ||
453fa030 | 81 | perf_evlist__set_maps(&evlist->core, cpus, threads); |
29982722 | 82 | |
7b392ef0 | 83 | err = evlist__prepare_workload(evlist, &target, argv, false, workload_exec_failed_signal); |
d723a550 NK |
84 | if (err < 0) { |
85 | pr_debug("Couldn't run the workload!\n"); | |
03ad9747 | 86 | goto out_delete_evlist; |
d723a550 NK |
87 | } |
88 | ||
515dbe48 | 89 | evsel = evlist__first(evlist); |
1fc632ce | 90 | evsel->core.attr.task = 1; |
99654849 | 91 | #ifdef __s390x__ |
1fc632ce | 92 | evsel->core.attr.sample_freq = 1000000; |
99654849 | 93 | #else |
1fc632ce | 94 | evsel->core.attr.sample_freq = 1; |
99654849 | 95 | #endif |
1fc632ce JO |
96 | evsel->core.attr.inherit = 0; |
97 | evsel->core.attr.watermark = 0; | |
98 | evsel->core.attr.wakeup_events = 1; | |
99 | evsel->core.attr.exclude_kernel = 1; | |
d723a550 | 100 | |
474ddc4c | 101 | err = evlist__open(evlist); |
d723a550 | 102 | if (err < 0) { |
ba3dfff8 | 103 | pr_debug("Couldn't open the evlist: %s\n", |
c8b5f2c9 | 104 | str_error_r(-err, sbuf, sizeof(sbuf))); |
03ad9747 | 105 | goto out_delete_evlist; |
d723a550 NK |
106 | } |
107 | ||
9521b5f2 | 108 | if (evlist__mmap(evlist, 128) < 0) { |
d723a550 | 109 | pr_debug("failed to mmap events: %d (%s)\n", errno, |
c8b5f2c9 | 110 | str_error_r(errno, sbuf, sizeof(sbuf))); |
6add129c | 111 | err = -1; |
f26e1c7c | 112 | goto out_delete_evlist; |
d723a550 NK |
113 | } |
114 | ||
7b392ef0 | 115 | evlist__start_workload(evlist); |
d723a550 NK |
116 | |
117 | retry: | |
75948730 | 118 | md = &evlist->mmap[0]; |
7c4d4182 | 119 | if (perf_mmap__read_init(&md->core) < 0) |
75948730 KL |
120 | goto out_init; |
121 | ||
151ed5d7 | 122 | while ((event = perf_mmap__read_event(&md->core)) != NULL) { |
8e50d384 ZZ |
123 | if (event->header.type == PERF_RECORD_EXIT) |
124 | nr_exit++; | |
d723a550 | 125 | |
7728fa0c | 126 | perf_mmap__consume(&md->core); |
d723a550 | 127 | } |
32fdc2ca | 128 | perf_mmap__read_done(&md->core); |
d723a550 | 129 | |
75948730 | 130 | out_init: |
d723a550 | 131 | if (!exited || !nr_exit) { |
80ab2987 | 132 | evlist__poll(evlist, -1); |
791ce9c4 LY |
133 | |
134 | if (retry_count++ > 1000) { | |
135 | pr_debug("Failed after retrying 1000 times\n"); | |
136 | err = -1; | |
83d25ccd | 137 | goto out_delete_evlist; |
791ce9c4 LY |
138 | } |
139 | ||
d723a550 NK |
140 | goto retry; |
141 | } | |
142 | ||
143 | if (nr_exit != 1) { | |
144 | pr_debug("received %d EXIT records\n", nr_exit); | |
145 | err = -1; | |
146 | } | |
147 | ||
83d25ccd | 148 | out_delete_evlist: |
38f01d8d | 149 | perf_cpu_map__put(cpus); |
7836e52e | 150 | perf_thread_map__put(threads); |
c12995a5 | 151 | evlist__delete(evlist); |
d723a550 NK |
152 | return err; |
153 | } | |
d68f0365 IR |
154 | |
155 | DEFINE_SUITE("Number of exit events of a simple workload", task_exit); |