mmap-basic.c (ecd740c6f2f092b90b95fa35f757973589eaaca2) mmap-basic.c (ba3dfff8ad2d98df0c8116faaeb281c93e161636)
1#include "evlist.h"
2#include "evsel.h"
3#include "thread_map.h"
4#include "cpumap.h"
5#include "tests.h"
6
7/*
8 * This test will generate random numbers of calls to some getpid syscalls,

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26 const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
27 "getpgid", };
28 pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
29 (void*)getpgid };
30#define nsyscalls ARRAY_SIZE(syscall_names)
31 unsigned int nr_events[nsyscalls],
32 expected_nr_events[nsyscalls], i, j;
33 struct perf_evsel *evsels[nsyscalls], *evsel;
1#include "evlist.h"
2#include "evsel.h"
3#include "thread_map.h"
4#include "cpumap.h"
5#include "tests.h"
6
7/*
8 * This test will generate random numbers of calls to some getpid syscalls,

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26 const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
27 "getpgid", };
28 pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
29 (void*)getpgid };
30#define nsyscalls ARRAY_SIZE(syscall_names)
31 unsigned int nr_events[nsyscalls],
32 expected_nr_events[nsyscalls], i, j;
33 struct perf_evsel *evsels[nsyscalls], *evsel;
34 char sbuf[STRERR_BUFSIZE];
34
35 threads = thread_map__new(-1, getpid(), UINT_MAX);
36 if (threads == NULL) {
37 pr_debug("thread_map__new\n");
38 return -1;
39 }
40
41 cpus = cpu_map__new(NULL);
42 if (cpus == NULL) {
43 pr_debug("cpu_map__new\n");
44 goto out_free_threads;
45 }
46
47 CPU_ZERO(&cpu_set);
48 CPU_SET(cpus->map[0], &cpu_set);
49 sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
50 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
51 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
35
36 threads = thread_map__new(-1, getpid(), UINT_MAX);
37 if (threads == NULL) {
38 pr_debug("thread_map__new\n");
39 return -1;
40 }
41
42 cpus = cpu_map__new(NULL);
43 if (cpus == NULL) {
44 pr_debug("cpu_map__new\n");
45 goto out_free_threads;
46 }
47
48 CPU_ZERO(&cpu_set);
49 CPU_SET(cpus->map[0], &cpu_set);
50 sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
51 if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
52 pr_debug("sched_setaffinity() failed on CPU %d: %s ",
52 cpus->map[0], strerror(errno));
53 cpus->map[0], strerror_r(errno, sbuf, sizeof(sbuf)));
53 goto out_free_cpus;
54 }
55
56 evlist = perf_evlist__new();
57 if (evlist == NULL) {
58 pr_debug("perf_evlist__new\n");
59 goto out_free_cpus;
60 }

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74 evsels[i]->attr.wakeup_events = 1;
75 perf_evsel__set_sample_id(evsels[i], false);
76
77 perf_evlist__add(evlist, evsels[i]);
78
79 if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
80 pr_debug("failed to open counter: %s, "
81 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
54 goto out_free_cpus;
55 }
56
57 evlist = perf_evlist__new();
58 if (evlist == NULL) {
59 pr_debug("perf_evlist__new\n");
60 goto out_free_cpus;
61 }

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75 evsels[i]->attr.wakeup_events = 1;
76 perf_evsel__set_sample_id(evsels[i], false);
77
78 perf_evlist__add(evlist, evsels[i]);
79
80 if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
81 pr_debug("failed to open counter: %s, "
82 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
82 strerror(errno));
83 strerror_r(errno, sbuf, sizeof(sbuf)));
83 goto out_delete_evlist;
84 }
85
86 nr_events[i] = 0;
87 expected_nr_events[i] = 1 + rand() % 127;
88 }
89
90 if (perf_evlist__mmap(evlist, 128, true) < 0) {
91 pr_debug("failed to mmap events: %d (%s)\n", errno,
84 goto out_delete_evlist;
85 }
86
87 nr_events[i] = 0;
88 expected_nr_events[i] = 1 + rand() % 127;
89 }
90
91 if (perf_evlist__mmap(evlist, 128, true) < 0) {
92 pr_debug("failed to mmap events: %d (%s)\n", errno,
92 strerror(errno));
93 strerror_r(errno, sbuf, sizeof(sbuf)));
93 goto out_delete_evlist;
94 }
95
96 for (i = 0; i < nsyscalls; ++i)
97 for (j = 0; j < expected_nr_events[i]; ++j) {
98 int foo = syscalls[i]();
99 ++foo;
100 }

--- 48 unchanged lines hidden --- 		94 goto out_delete_evlist;
95 }
96
97 for (i = 0; i < nsyscalls; ++i)
98 for (j = 0; j < expected_nr_events[i]; ++j) {
99 int foo = syscalls[i]();
100 ++foo;
101 }

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