diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Makefile | 1 | ||||
| -rw-r--r-- | tools/perf/tests/builtin-test.c | 157 | ||||
| -rw-r--r-- | tools/perf/tests/mmap-basic.c | 162 | ||||
| -rw-r--r-- | tools/perf/tests/tests.h | 1 |
4 files changed, 164 insertions, 157 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index d413e89c38e..337489e827c 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -434,6 +434,7 @@ LIB_OBJS += $(OUTPUT)tests/attr.o LIB_OBJS += $(OUTPUT)tests/vmlinux-kallsyms.o LIB_OBJS += $(OUTPUT)tests/open-syscall.o LIB_OBJS += $(OUTPUT)tests/open-syscall-all-cpus.o +LIB_OBJS += $(OUTPUT)tests/mmap-basic.o LIB_OBJS += $(OUTPUT)tests/util.o BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 98e883bc330..609f5929532 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -30,163 +30,6 @@ #include <sched.h> -/* - * This test will generate random numbers of calls to some getpid syscalls, - * then establish an mmap for a group of events that are created to monitor - * the syscalls. - * - * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated - * sample.id field to map back to its respective perf_evsel instance. - * - * Then it checks if the number of syscalls reported as perf events by - * the kernel corresponds to the number of syscalls made. - */ -static int test__basic_mmap(void) -{ - int err = -1; - union perf_event *event; - struct thread_map *threads; - struct cpu_map *cpus; - struct perf_evlist *evlist; - struct perf_event_attr attr = { - .type = PERF_TYPE_TRACEPOINT, - .read_format = PERF_FORMAT_ID, - .sample_type = PERF_SAMPLE_ID, - .watermark = 0, - }; - cpu_set_t cpu_set; - const char *syscall_names[] = { "getsid", "getppid", "getpgrp", - "getpgid", }; - pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp, - (void*)getpgid }; -#define nsyscalls ARRAY_SIZE(syscall_names) - int ids[nsyscalls]; - unsigned int nr_events[nsyscalls], - expected_nr_events[nsyscalls], i, j; - struct perf_evsel *evsels[nsyscalls], *evsel; - - for (i = 0; i < nsyscalls; ++i) { - char name[64]; - - snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]); - ids[i] = trace_event__id(name); - if (ids[i] < 0) { - pr_debug("Is debugfs mounted on /sys/kernel/debug?\n"); - return -1; - } - nr_events[i] = 0; - expected_nr_events[i] = random() % 257; - } - - threads = thread_map__new(-1, getpid(), UINT_MAX); - if (threads == NULL) { - pr_debug("thread_map__new\n"); - return -1; - } - - cpus = cpu_map__new(NULL); - if (cpus == NULL) { - pr_debug("cpu_map__new\n"); - goto out_free_threads; - } - - CPU_ZERO(&cpu_set); - CPU_SET(cpus->map[0], &cpu_set); - sched_setaffinity(0, sizeof(cpu_set), &cpu_set); - if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { - pr_debug("sched_setaffinity() failed on CPU %d: %s ", - cpus->map[0], strerror(errno)); - goto out_free_cpus; - } - - evlist = perf_evlist__new(cpus, threads); - if (evlist == NULL) { - pr_debug("perf_evlist__new\n"); - goto out_free_cpus; - } - - /* anonymous union fields, can't be initialized above */ - attr.wakeup_events = 1; - attr.sample_period = 1; - - for (i = 0; i < nsyscalls; ++i) { - attr.config = ids[i]; - evsels[i] = perf_evsel__new(&attr, i); - if (evsels[i] == NULL) { - pr_debug("perf_evsel__new\n"); - goto out_free_evlist; - } - - perf_evlist__add(evlist, evsels[i]); - - if (perf_evsel__open(evsels[i], cpus, threads) < 0) { - pr_debug("failed to open counter: %s, " - "tweak /proc/sys/kernel/perf_event_paranoid?\n", - strerror(errno)); - goto out_close_fd; - } - } - - if (perf_evlist__mmap(evlist, 128, true) < 0) { - pr_debug("failed to mmap events: %d (%s)\n", errno, - strerror(errno)); - goto out_close_fd; - } - - for (i = 0; i < nsyscalls; ++i) - for (j = 0; j < expected_nr_events[i]; ++j) { - int foo = syscalls[i](); - ++foo; - } - - while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { - struct perf_sample sample; - - if (event->header.type != PERF_RECORD_SAMPLE) { - pr_debug("unexpected %s event\n", - perf_event__name(event->header.type)); - goto out_munmap; - } - - err = perf_evlist__parse_sample(evlist, event, &sample); - if (err) { - pr_err("Can't parse sample, err = %d\n", err); - goto out_munmap; - } - - evsel = perf_evlist__id2evsel(evlist, sample.id); - if (evsel == NULL) { - pr_debug("event with id %" PRIu64 - " doesn't map to an evsel\n", sample.id); - goto out_munmap; - } - nr_events[evsel->idx]++; - } - - list_for_each_entry(evsel, &evlist->entries, node) { - if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) { - pr_debug("expected %d %s events, got %d\n", - expected_nr_events[evsel->idx], - perf_evsel__name(evsel), nr_events[evsel->idx]); - goto out_munmap; - } - } - - err = 0; -out_munmap: - perf_evlist__munmap(evlist); -out_close_fd: - for (i = 0; i < nsyscalls; ++i) - perf_evsel__close_fd(evsels[i], 1, threads->nr); -out_free_evlist: - perf_evlist__delete(evlist); -out_free_cpus: - cpu_map__delete(cpus); -out_free_threads: - thread_map__delete(threads); - return err; -#undef nsyscalls -} static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t *maskp) { diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c new file mode 100644 index 00000000000..e1746811e14 --- /dev/null +++ b/tools/perf/tests/mmap-basic.c @@ -0,0 +1,162 @@ +#include "evlist.h" +#include "evsel.h" +#include "thread_map.h" +#include "cpumap.h" +#include "tests.h" + +/* + * This test will generate random numbers of calls to some getpid syscalls, + * then establish an mmap for a group of events that are created to monitor + * the syscalls. + * + * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated + * sample.id field to map back to its respective perf_evsel instance. + * + * Then it checks if the number of syscalls reported as perf events by + * the kernel corresponds to the number of syscalls made. + */ +int test__basic_mmap(void) +{ + int err = -1; + union perf_event *event; + struct thread_map *threads; + struct cpu_map *cpus; + struct perf_evlist *evlist; + struct perf_event_attr attr = { + .type = PERF_TYPE_TRACEPOINT, + .read_format = PERF_FORMAT_ID, + .sample_type = PERF_SAMPLE_ID, + .watermark = 0, + }; + cpu_set_t cpu_set; + const char *syscall_names[] = { "getsid", "getppid", "getpgrp", + "getpgid", }; + pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp, + (void*)getpgid }; +#define nsyscalls ARRAY_SIZE(syscall_names) + int ids[nsyscalls]; + unsigned int nr_events[nsyscalls], + expected_nr_events[nsyscalls], i, j; + struct perf_evsel *evsels[nsyscalls], *evsel; + + for (i = 0; i < nsyscalls; ++i) { + char name[64]; + + snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]); + ids[i] = trace_event__id(name); + if (ids[i] < 0) { + pr_debug("Is debugfs mounted on /sys/kernel/debug?\n"); + return -1; + } + nr_events[i] = 0; + expected_nr_events[i] = random() % 257; + } + + threads = thread_map__new(-1, getpid(), UINT_MAX); + if (threads == NULL) { + pr_debug("thread_map__new\n"); + return -1; + } + + cpus = cpu_map__new(NULL); + if (cpus == NULL) { + pr_debug("cpu_map__new\n"); + goto out_free_threads; + } + + CPU_ZERO(&cpu_set); + CPU_SET(cpus->map[0], &cpu_set); + sched_setaffinity(0, sizeof(cpu_set), &cpu_set); + if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) { + pr_debug("sched_setaffinity() failed on CPU %d: %s ", + cpus->map[0], strerror(errno)); + goto out_free_cpus; + } + + evlist = perf_evlist__new(cpus, threads); + if (evlist == NULL) { + pr_debug("perf_evlist__new\n"); + goto out_free_cpus; + } + + /* anonymous union fields, can't be initialized above */ + attr.wakeup_events = 1; + attr.sample_period = 1; + + for (i = 0; i < nsyscalls; ++i) { + attr.config = ids[i]; + evsels[i] = perf_evsel__new(&attr, i); + if (evsels[i] == NULL) { + pr_debug("perf_evsel__new\n"); + goto out_free_evlist; + } + + perf_evlist__add(evlist, evsels[i]); + + if (perf_evsel__open(evsels[i], cpus, threads) < 0) { + pr_debug("failed to open counter: %s, " + "tweak /proc/sys/kernel/perf_event_paranoid?\n", + strerror(errno)); + goto out_close_fd; + } + } + + if (perf_evlist__mmap(evlist, 128, true) < 0) { + pr_debug("failed to mmap events: %d (%s)\n", errno, + strerror(errno)); + goto out_close_fd; + } + + for (i = 0; i < nsyscalls; ++i) + for (j = 0; j < expected_nr_events[i]; ++j) { + int foo = syscalls[i](); + ++foo; + } + + while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { + struct perf_sample sample; + + if (event->header.type != PERF_RECORD_SAMPLE) { + pr_debug("unexpected %s event\n", + perf_event__name(event->header.type)); + goto out_munmap; + } + + err = perf_evlist__parse_sample(evlist, event, &sample); + if (err) { + pr_err("Can't parse sample, err = %d\n", err); + goto out_munmap; + } + + evsel = perf_evlist__id2evsel(evlist, sample.id); + if (evsel == NULL) { + pr_debug("event with id %" PRIu64 + " doesn't map to an evsel\n", sample.id); + goto out_munmap; + } + nr_events[evsel->idx]++; + } + + list_for_each_entry(evsel, &evlist->entries, node) { + if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) { + pr_debug("expected %d %s events, got %d\n", + expected_nr_events[evsel->idx], + perf_evsel__name(evsel), nr_events[evsel->idx]); + goto out_munmap; + } + } + + err = 0; +out_munmap: + perf_evlist__munmap(evlist); +out_close_fd: + for (i = 0; i < nsyscalls; ++i) + perf_evsel__close_fd(evsels[i], 1, threads->nr); +out_free_evlist: + perf_evlist__delete(evlist); +out_free_cpus: + cpu_map__delete(cpus); +out_free_threads: + thread_map__delete(threads); + return err; +} diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index c2887f226db..1a925ddeae7 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -5,6 +5,7 @@ int test__vmlinux_matches_kallsyms(void); int test__open_syscall_event(void); int test__open_syscall_event_on_all_cpus(void); +int test__basic_mmap(void); /* Util */ int trace_event__id(const char *evname); |