Commit | Line | Data |
---|---|---|
a43783ae | 1 | #include <errno.h> |
fd20e811 | 2 | #include <inttypes.h> |
1fbe7df8 ACM |
3 | /* For the CPU_* macros */ |
4 | #include <pthread.h> | |
5 | ||
4605eab3 | 6 | #include <api/fs/fs.h> |
8dd2a131 | 7 | #include <linux/err.h> |
bd90517b JO |
8 | #include "evsel.h" |
9 | #include "tests.h" | |
10 | #include "thread_map.h" | |
11 | #include "cpumap.h" | |
12 | #include "debug.h" | |
a9a3a4d9 | 13 | #include "stat.h" |
bd90517b | 14 | |
721a1f53 | 15 | int test__openat_syscall_event_on_all_cpus(int subtest __maybe_unused) |
bd90517b JO |
16 | { |
17 | int err = -1, fd, cpu; | |
bd90517b JO |
18 | struct cpu_map *cpus; |
19 | struct perf_evsel *evsel; | |
43f322b4 | 20 | unsigned int nr_openat_calls = 111, i; |
bd90517b | 21 | cpu_set_t cpu_set; |
a60d7953 | 22 | struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX); |
ba3dfff8 | 23 | char sbuf[STRERR_BUFSIZE]; |
fbf99625 | 24 | char errbuf[BUFSIZ]; |
bd90517b | 25 | |
bd90517b JO |
26 | if (threads == NULL) { |
27 | pr_debug("thread_map__new\n"); | |
28 | return -1; | |
29 | } | |
30 | ||
31 | cpus = cpu_map__new(NULL); | |
32 | if (cpus == NULL) { | |
33 | pr_debug("cpu_map__new\n"); | |
34 | goto out_thread_map_delete; | |
35 | } | |
36 | ||
bd90517b JO |
37 | CPU_ZERO(&cpu_set); |
38 | ||
43f322b4 | 39 | evsel = perf_evsel__newtp("syscalls", "sys_enter_openat"); |
8dd2a131 | 40 | if (IS_ERR(evsel)) { |
fbf99625 | 41 | tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat"); |
87191383 | 42 | pr_debug("%s\n", errbuf); |
bd90517b JO |
43 | goto out_thread_map_delete; |
44 | } | |
45 | ||
46 | if (perf_evsel__open(evsel, cpus, threads) < 0) { | |
47 | pr_debug("failed to open counter: %s, " | |
48 | "tweak /proc/sys/kernel/perf_event_paranoid?\n", | |
c8b5f2c9 | 49 | str_error_r(errno, sbuf, sizeof(sbuf))); |
bd90517b JO |
50 | goto out_evsel_delete; |
51 | } | |
52 | ||
53 | for (cpu = 0; cpu < cpus->nr; ++cpu) { | |
43f322b4 | 54 | unsigned int ncalls = nr_openat_calls + cpu; |
bd90517b JO |
55 | /* |
56 | * XXX eventually lift this restriction in a way that | |
57 | * keeps perf building on older glibc installations | |
58 | * without CPU_ALLOC. 1024 cpus in 2010 still seems | |
59 | * a reasonable upper limit tho :-) | |
60 | */ | |
61 | if (cpus->map[cpu] >= CPU_SETSIZE) { | |
62 | pr_debug("Ignoring CPU %d\n", cpus->map[cpu]); | |
63 | continue; | |
64 | } | |
65 | ||
66 | CPU_SET(cpus->map[cpu], &cpu_set); | |
67 | if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { | |
68 | pr_debug("sched_setaffinity() failed on CPU %d: %s ", | |
69 | cpus->map[cpu], | |
c8b5f2c9 | 70 | str_error_r(errno, sbuf, sizeof(sbuf))); |
bd90517b JO |
71 | goto out_close_fd; |
72 | } | |
73 | for (i = 0; i < ncalls; ++i) { | |
43f322b4 | 74 | fd = openat(0, "/etc/passwd", O_RDONLY); |
bd90517b JO |
75 | close(fd); |
76 | } | |
77 | CPU_CLR(cpus->map[cpu], &cpu_set); | |
78 | } | |
79 | ||
80 | /* | |
bd1a0be5 | 81 | * Here we need to explicitly preallocate the counts, as if |
bd90517b JO |
82 | * we use the auto allocation it will allocate just for 1 cpu, |
83 | * as we start by cpu 0. | |
84 | */ | |
a6fa0038 | 85 | if (perf_evsel__alloc_counts(evsel, cpus->nr, 1) < 0) { |
bd90517b JO |
86 | pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr); |
87 | goto out_close_fd; | |
88 | } | |
89 | ||
90 | err = 0; | |
91 | ||
92 | for (cpu = 0; cpu < cpus->nr; ++cpu) { | |
93 | unsigned int expected; | |
94 | ||
95 | if (cpus->map[cpu] >= CPU_SETSIZE) | |
96 | continue; | |
97 | ||
98 | if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) { | |
99 | pr_debug("perf_evsel__read_on_cpu\n"); | |
100 | err = -1; | |
101 | break; | |
102 | } | |
103 | ||
43f322b4 | 104 | expected = nr_openat_calls + cpu; |
a6fa0038 | 105 | if (perf_counts(evsel->counts, cpu, 0)->val != expected) { |
bd90517b | 106 | pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n", |
a6fa0038 | 107 | expected, cpus->map[cpu], perf_counts(evsel->counts, cpu, 0)->val); |
bd90517b JO |
108 | err = -1; |
109 | } | |
110 | } | |
111 | ||
43f8e76e | 112 | perf_evsel__free_counts(evsel); |
bd90517b JO |
113 | out_close_fd: |
114 | perf_evsel__close_fd(evsel, 1, threads->nr); | |
115 | out_evsel_delete: | |
116 | perf_evsel__delete(evsel); | |
117 | out_thread_map_delete: | |
186fbb74 | 118 | thread_map__put(threads); |
bd90517b JO |
119 | return err; |
120 | } |