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>
This commit is contained in:
Jiri Olsa
Arnaldo Carvalho de Melo
parent
bd90517b37
commit
a65b9c62be
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@ -434,6 +434,7 @@ LIB_OBJS += $(OUTPUT)tests/attr.o
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LIB_OBJS += $(OUTPUT)tests/vmlinux-kallsyms.o
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LIB_OBJS += $(OUTPUT)tests/open-syscall.o
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LIB_OBJS += $(OUTPUT)tests/open-syscall-all-cpus.o
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LIB_OBJS += $(OUTPUT)tests/mmap-basic.o
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LIB_OBJS += $(OUTPUT)tests/util.o
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BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
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@ -30,163 +30,6 @@
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#include <sched.h>
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/*
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* This test will generate random numbers of calls to some getpid syscalls,
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* then establish an mmap for a group of events that are created to monitor
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* the syscalls.
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*
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* It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
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* sample.id field to map back to its respective perf_evsel instance.
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*
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* Then it checks if the number of syscalls reported as perf events by
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* the kernel corresponds to the number of syscalls made.
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*/
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static int test__basic_mmap(void)
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{
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int err = -1;
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union perf_event *event;
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struct thread_map *threads;
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struct cpu_map *cpus;
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struct perf_evlist *evlist;
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struct perf_event_attr attr = {
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.type = PERF_TYPE_TRACEPOINT,
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.read_format = PERF_FORMAT_ID,
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.sample_type = PERF_SAMPLE_ID,
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.watermark = 0,
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};
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cpu_set_t cpu_set;
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const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
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"getpgid", };
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pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
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(void*)getpgid };
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#define nsyscalls ARRAY_SIZE(syscall_names)
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int ids[nsyscalls];
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unsigned int nr_events[nsyscalls],
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expected_nr_events[nsyscalls], i, j;
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struct perf_evsel *evsels[nsyscalls], *evsel;
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for (i = 0; i < nsyscalls; ++i) {
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char name[64];
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snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
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ids[i] = trace_event__id(name);
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if (ids[i] < 0) {
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pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
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return -1;
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}
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nr_events[i] = 0;
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expected_nr_events[i] = random() % 257;
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}
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threads = thread_map__new(-1, getpid(), UINT_MAX);
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if (threads == NULL) {
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pr_debug("thread_map__new\n");
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return -1;
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}
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cpus = cpu_map__new(NULL);
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if (cpus == NULL) {
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pr_debug("cpu_map__new\n");
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goto out_free_threads;
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}
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CPU_ZERO(&cpu_set);
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CPU_SET(cpus->map[0], &cpu_set);
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sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
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if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
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pr_debug("sched_setaffinity() failed on CPU %d: %s ",
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cpus->map[0], strerror(errno));
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goto out_free_cpus;
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}
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evlist = perf_evlist__new(cpus, threads);
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if (evlist == NULL) {
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pr_debug("perf_evlist__new\n");
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goto out_free_cpus;
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}
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/* anonymous union fields, can't be initialized above */
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attr.wakeup_events = 1;
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attr.sample_period = 1;
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for (i = 0; i < nsyscalls; ++i) {
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attr.config = ids[i];
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evsels[i] = perf_evsel__new(&attr, i);
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if (evsels[i] == NULL) {
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pr_debug("perf_evsel__new\n");
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goto out_free_evlist;
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}
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perf_evlist__add(evlist, evsels[i]);
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if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
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pr_debug("failed to open counter: %s, "
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"tweak /proc/sys/kernel/perf_event_paranoid?\n",
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strerror(errno));
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goto out_close_fd;
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}
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}
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if (perf_evlist__mmap(evlist, 128, true) < 0) {
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pr_debug("failed to mmap events: %d (%s)\n", errno,
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strerror(errno));
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goto out_close_fd;
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}
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for (i = 0; i < nsyscalls; ++i)
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for (j = 0; j < expected_nr_events[i]; ++j) {
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int foo = syscalls[i]();
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++foo;
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}
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while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
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struct perf_sample sample;
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if (event->header.type != PERF_RECORD_SAMPLE) {
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pr_debug("unexpected %s event\n",
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perf_event__name(event->header.type));
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goto out_munmap;
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}
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err = perf_evlist__parse_sample(evlist, event, &sample);
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if (err) {
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pr_err("Can't parse sample, err = %d\n", err);
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goto out_munmap;
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}
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evsel = perf_evlist__id2evsel(evlist, sample.id);
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if (evsel == NULL) {
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pr_debug("event with id %" PRIu64
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" doesn't map to an evsel\n", sample.id);
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goto out_munmap;
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}
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nr_events[evsel->idx]++;
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}
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list_for_each_entry(evsel, &evlist->entries, node) {
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if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
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pr_debug("expected %d %s events, got %d\n",
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expected_nr_events[evsel->idx],
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perf_evsel__name(evsel), nr_events[evsel->idx]);
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goto out_munmap;
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}
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}
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err = 0;
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out_munmap:
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perf_evlist__munmap(evlist);
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out_close_fd:
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for (i = 0; i < nsyscalls; ++i)
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perf_evsel__close_fd(evsels[i], 1, threads->nr);
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out_free_evlist:
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perf_evlist__delete(evlist);
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out_free_cpus:
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cpu_map__delete(cpus);
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out_free_threads:
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thread_map__delete(threads);
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return err;
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#undef nsyscalls
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}
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static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t *maskp)
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{
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@ -0,0 +1,162 @@
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#include "evlist.h"
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#include "evsel.h"
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#include "thread_map.h"
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#include "cpumap.h"
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#include "tests.h"
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/*
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* This test will generate random numbers of calls to some getpid syscalls,
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* then establish an mmap for a group of events that are created to monitor
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* the syscalls.
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*
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* It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
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* sample.id field to map back to its respective perf_evsel instance.
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*
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* Then it checks if the number of syscalls reported as perf events by
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* the kernel corresponds to the number of syscalls made.
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*/
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int test__basic_mmap(void)
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{
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int err = -1;
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union perf_event *event;
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struct thread_map *threads;
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struct cpu_map *cpus;
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struct perf_evlist *evlist;
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struct perf_event_attr attr = {
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.type = PERF_TYPE_TRACEPOINT,
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.read_format = PERF_FORMAT_ID,
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.sample_type = PERF_SAMPLE_ID,
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.watermark = 0,
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};
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cpu_set_t cpu_set;
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const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
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"getpgid", };
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pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
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(void*)getpgid };
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#define nsyscalls ARRAY_SIZE(syscall_names)
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int ids[nsyscalls];
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unsigned int nr_events[nsyscalls],
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expected_nr_events[nsyscalls], i, j;
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struct perf_evsel *evsels[nsyscalls], *evsel;
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for (i = 0; i < nsyscalls; ++i) {
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char name[64];
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snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
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ids[i] = trace_event__id(name);
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if (ids[i] < 0) {
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pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
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return -1;
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}
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nr_events[i] = 0;
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expected_nr_events[i] = random() % 257;
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}
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threads = thread_map__new(-1, getpid(), UINT_MAX);
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if (threads == NULL) {
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pr_debug("thread_map__new\n");
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return -1;
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}
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cpus = cpu_map__new(NULL);
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if (cpus == NULL) {
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pr_debug("cpu_map__new\n");
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goto out_free_threads;
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}
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CPU_ZERO(&cpu_set);
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CPU_SET(cpus->map[0], &cpu_set);
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sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
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if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
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pr_debug("sched_setaffinity() failed on CPU %d: %s ",
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cpus->map[0], strerror(errno));
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goto out_free_cpus;
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}
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evlist = perf_evlist__new(cpus, threads);
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if (evlist == NULL) {
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pr_debug("perf_evlist__new\n");
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goto out_free_cpus;
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}
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/* anonymous union fields, can't be initialized above */
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attr.wakeup_events = 1;
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attr.sample_period = 1;
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for (i = 0; i < nsyscalls; ++i) {
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attr.config = ids[i];
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evsels[i] = perf_evsel__new(&attr, i);
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if (evsels[i] == NULL) {
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pr_debug("perf_evsel__new\n");
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goto out_free_evlist;
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}
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perf_evlist__add(evlist, evsels[i]);
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if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
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pr_debug("failed to open counter: %s, "
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"tweak /proc/sys/kernel/perf_event_paranoid?\n",
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strerror(errno));
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goto out_close_fd;
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}
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}
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if (perf_evlist__mmap(evlist, 128, true) < 0) {
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pr_debug("failed to mmap events: %d (%s)\n", errno,
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strerror(errno));
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goto out_close_fd;
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}
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for (i = 0; i < nsyscalls; ++i)
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for (j = 0; j < expected_nr_events[i]; ++j) {
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int foo = syscalls[i]();
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++foo;
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}
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while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
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struct perf_sample sample;
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if (event->header.type != PERF_RECORD_SAMPLE) {
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pr_debug("unexpected %s event\n",
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perf_event__name(event->header.type));
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goto out_munmap;
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}
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err = perf_evlist__parse_sample(evlist, event, &sample);
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if (err) {
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pr_err("Can't parse sample, err = %d\n", err);
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goto out_munmap;
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}
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evsel = perf_evlist__id2evsel(evlist, sample.id);
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if (evsel == NULL) {
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pr_debug("event with id %" PRIu64
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" doesn't map to an evsel\n", sample.id);
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goto out_munmap;
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}
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nr_events[evsel->idx]++;
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}
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list_for_each_entry(evsel, &evlist->entries, node) {
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if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
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pr_debug("expected %d %s events, got %d\n",
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expected_nr_events[evsel->idx],
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perf_evsel__name(evsel), nr_events[evsel->idx]);
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goto out_munmap;
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}
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}
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err = 0;
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out_munmap:
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perf_evlist__munmap(evlist);
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out_close_fd:
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for (i = 0; i < nsyscalls; ++i)
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perf_evsel__close_fd(evsels[i], 1, threads->nr);
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out_free_evlist:
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perf_evlist__delete(evlist);
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out_free_cpus:
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cpu_map__delete(cpus);
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out_free_threads:
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thread_map__delete(threads);
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return err;
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}
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@ -5,6 +5,7 @@
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int test__vmlinux_matches_kallsyms(void);
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int test__open_syscall_event(void);
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int test__open_syscall_event_on_all_cpus(void);
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int test__basic_mmap(void);
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/* Util */
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int trace_event__id(const char *evname);
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