^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) /* For the CLR_() macros */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <pthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <perf/cpumap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "evlist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "evsel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "thread_map.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "tests.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "util/mmap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <perf/evlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <perf/mmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * This test will generate random numbers of calls to some getpid syscalls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * then establish an mmap for a group of events that are created to monitor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * the syscalls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * sample.id field to map back to its respective perf_evsel instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Then it checks if the number of syscalls reported as perf events by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * the kernel corresponds to the number of syscalls made.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) union perf_event *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct perf_thread_map *threads;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct perf_cpu_map *cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct evlist *evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) cpu_set_t cpu_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) const char *syscall_names[] = { "getsid", "getppid", "getpgid", };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) pid_t (*syscalls[])(void) = { (void *)getsid, getppid, (void*)getpgid };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define nsyscalls ARRAY_SIZE(syscall_names)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned int nr_events[nsyscalls],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) expected_nr_events[nsyscalls], i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct evsel *evsels[nsyscalls], *evsel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) char sbuf[STRERR_BUFSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct mmap *md;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) threads = thread_map__new(-1, getpid(), UINT_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (threads == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) pr_debug("thread_map__new\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) cpus = perf_cpu_map__new(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (cpus == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) pr_debug("perf_cpu_map__new\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) goto out_free_threads;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) CPU_ZERO(&cpu_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) CPU_SET(cpus->map[0], &cpu_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) pr_debug("sched_setaffinity() failed on CPU %d: %s ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) cpus->map[0], str_error_r(errno, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) goto out_free_cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) evlist = evlist__new();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (evlist == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) pr_debug("perf_evlist__new\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) goto out_free_cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) perf_evlist__set_maps(&evlist->core, cpus, threads);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) for (i = 0; i < nsyscalls; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) char name[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) evsels[i] = evsel__newtp("syscalls", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (IS_ERR(evsels[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) pr_debug("evsel__new(%s)\n", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) evsels[i]->core.attr.wakeup_events = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) evsel__set_sample_id(evsels[i], false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) evlist__add(evlist, evsels[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (evsel__open(evsels[i], cpus, threads) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) pr_debug("failed to open counter: %s, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) "tweak /proc/sys/kernel/perf_event_paranoid?\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) str_error_r(errno, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) nr_events[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) expected_nr_events[i] = 1 + rand() % 127;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (evlist__mmap(evlist, 128) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) pr_debug("failed to mmap events: %d (%s)\n", errno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) str_error_r(errno, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) for (i = 0; i < nsyscalls; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) for (j = 0; j < expected_nr_events[i]; ++j) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int foo = syscalls[i]();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ++foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) md = &evlist->mmap[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (perf_mmap__read_init(&md->core) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) goto out_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) while ((event = perf_mmap__read_event(&md->core)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct perf_sample sample;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (event->header.type != PERF_RECORD_SAMPLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pr_debug("unexpected %s event\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) perf_event__name(event->header.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) err = perf_evlist__parse_sample(evlist, event, &sample);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) pr_err("Can't parse sample, err = %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) evsel = perf_evlist__id2evsel(evlist, sample.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (evsel == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) pr_debug("event with id %" PRIu64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) " doesn't map to an evsel\n", sample.id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) nr_events[evsel->idx]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) perf_mmap__consume(&md->core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) perf_mmap__read_done(&md->core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) out_init:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) evlist__for_each_entry(evlist, evsel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) pr_debug("expected %d %s events, got %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) expected_nr_events[evsel->idx],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) evsel__name(evsel), nr_events[evsel->idx]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) goto out_delete_evlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) out_delete_evlist:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) evlist__delete(evlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) cpus = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) threads = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) out_free_cpus:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) perf_cpu_map__put(cpus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) out_free_threads:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) perf_thread_map__put(threads);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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