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perf tests: Move test__basic_mmap into separate object
Separating test__basic_mmap test from the builtin-test into mmap-basic object. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1352508412-16914-5-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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; | ||
| } |
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