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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
perf_evlist__ is for 'struct perf_evlist' methods, in tools/lib/perf/, go on completing this split. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
241 lines
5.3 KiB
C
241 lines
5.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/compiler.h>
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#include <linux/string.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <perf/cpumap.h>
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#include "tests.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "debug.h"
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#include "parse-events.h"
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#include "thread_map.h"
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#include "target.h"
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static int attach__enable_on_exec(struct evlist *evlist)
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{
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struct evsel *evsel = evlist__last(evlist);
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struct target target = {
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.uid = UINT_MAX,
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};
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const char *argv[] = { "true", NULL, };
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char sbuf[STRERR_BUFSIZE];
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int err;
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pr_debug("attaching to spawned child, enable on exec\n");
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err = evlist__create_maps(evlist, &target);
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if (err < 0) {
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pr_debug("Not enough memory to create thread/cpu maps\n");
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return err;
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}
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err = evlist__prepare_workload(evlist, &target, argv, false, NULL);
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if (err < 0) {
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pr_debug("Couldn't run the workload!\n");
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return err;
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}
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evsel->core.attr.enable_on_exec = 1;
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err = evlist__open(evlist);
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if (err < 0) {
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pr_debug("perf_evlist__open: %s\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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return err;
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}
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return evlist__start_workload(evlist) == 1 ? TEST_OK : TEST_FAIL;
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}
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static int detach__enable_on_exec(struct evlist *evlist)
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{
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waitpid(evlist->workload.pid, NULL, 0);
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return 0;
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}
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static int attach__current_disabled(struct evlist *evlist)
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{
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struct evsel *evsel = evlist__last(evlist);
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struct perf_thread_map *threads;
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int err;
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pr_debug("attaching to current thread as disabled\n");
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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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evsel->core.attr.disabled = 1;
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err = evsel__open_per_thread(evsel, threads);
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if (err) {
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pr_debug("Failed to open event cpu-clock:u\n");
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return err;
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}
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perf_thread_map__put(threads);
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return evsel__enable(evsel) == 0 ? TEST_OK : TEST_FAIL;
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}
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static int attach__current_enabled(struct evlist *evlist)
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{
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struct evsel *evsel = evlist__last(evlist);
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struct perf_thread_map *threads;
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int err;
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pr_debug("attaching to current thread as enabled\n");
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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("failed to call thread_map__new\n");
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return -1;
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}
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err = evsel__open_per_thread(evsel, threads);
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perf_thread_map__put(threads);
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return err == 0 ? TEST_OK : TEST_FAIL;
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}
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static int detach__disable(struct evlist *evlist)
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{
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struct evsel *evsel = evlist__last(evlist);
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return evsel__enable(evsel);
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}
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static int attach__cpu_disabled(struct evlist *evlist)
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{
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struct evsel *evsel = evlist__last(evlist);
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struct perf_cpu_map *cpus;
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int err;
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pr_debug("attaching to CPU 0 as enabled\n");
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cpus = perf_cpu_map__new("0");
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if (cpus == NULL) {
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pr_debug("failed to call perf_cpu_map__new\n");
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return -1;
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}
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evsel->core.attr.disabled = 1;
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err = evsel__open_per_cpu(evsel, cpus, -1);
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if (err) {
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if (err == -EACCES)
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return TEST_SKIP;
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pr_debug("Failed to open event cpu-clock:u\n");
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return err;
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}
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perf_cpu_map__put(cpus);
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return evsel__enable(evsel);
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}
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static int attach__cpu_enabled(struct evlist *evlist)
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{
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struct evsel *evsel = evlist__last(evlist);
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struct perf_cpu_map *cpus;
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int err;
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pr_debug("attaching to CPU 0 as enabled\n");
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cpus = perf_cpu_map__new("0");
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if (cpus == NULL) {
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pr_debug("failed to call perf_cpu_map__new\n");
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return -1;
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}
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err = evsel__open_per_cpu(evsel, cpus, -1);
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if (err == -EACCES)
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return TEST_SKIP;
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perf_cpu_map__put(cpus);
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return err ? TEST_FAIL : TEST_OK;
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}
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static int test_times(int (attach)(struct evlist *),
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int (detach)(struct evlist *))
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{
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struct perf_counts_values count;
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struct evlist *evlist = NULL;
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struct evsel *evsel;
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int err = -1, i;
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evlist = evlist__new();
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if (!evlist) {
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pr_debug("failed to create event list\n");
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goto out_err;
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}
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err = parse_events(evlist, "cpu-clock:u", NULL);
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if (err) {
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pr_debug("failed to parse event cpu-clock:u\n");
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goto out_err;
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}
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evsel = evlist__last(evlist);
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evsel->core.attr.read_format |=
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PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING;
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err = attach(evlist);
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if (err == TEST_SKIP) {
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pr_debug(" SKIP : not enough rights\n");
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return err;
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}
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TEST_ASSERT_VAL("failed to attach", !err);
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for (i = 0; i < 100000000; i++) { }
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TEST_ASSERT_VAL("failed to detach", !detach(evlist));
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perf_evsel__read(&evsel->core, 0, 0, &count);
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err = !(count.ena == count.run);
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pr_debug(" %s: ena %" PRIu64", run %" PRIu64"\n",
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!err ? "OK " : "FAILED",
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count.ena, count.run);
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out_err:
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evlist__delete(evlist);
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return !err ? TEST_OK : TEST_FAIL;
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}
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/*
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* This test creates software event 'cpu-clock'
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* attaches it in several ways (explained below)
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* and checks that enabled and running times
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* match.
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*/
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int test__event_times(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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int err, ret = 0;
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#define _T(attach, detach) \
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err = test_times(attach, detach); \
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if (err && (ret == TEST_OK || ret == TEST_SKIP)) \
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ret = err;
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/* attach on newly spawned process after exec */
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_T(attach__enable_on_exec, detach__enable_on_exec)
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/* attach on current process as enabled */
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_T(attach__current_enabled, detach__disable)
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/* attach on current process as disabled */
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_T(attach__current_disabled, detach__disable)
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/* attach on cpu as disabled */
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_T(attach__cpu_disabled, detach__disable)
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/* attach on cpu as enabled */
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_T(attach__cpu_enabled, detach__disable)
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#undef _T
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return ret;
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}
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