// SPDX-License-Identifier: GPL-2.0
|
#include <linux/compiler.h>
|
#include <errno.h>
|
#include <inttypes.h>
|
#include <string.h>
|
#include <sys/wait.h>
|
#include "tests.h"
|
#include "evlist.h"
|
#include "evsel.h"
|
#include "util.h"
|
#include "debug.h"
|
#include "thread_map.h"
|
#include "target.h"
|
|
static int attach__enable_on_exec(struct perf_evlist *evlist)
|
{
|
struct perf_evsel *evsel = perf_evlist__last(evlist);
|
struct target target = {
|
.uid = UINT_MAX,
|
};
|
const char *argv[] = { "true", NULL, };
|
char sbuf[STRERR_BUFSIZE];
|
int err;
|
|
pr_debug("attaching to spawned child, enable on exec\n");
|
|
err = perf_evlist__create_maps(evlist, &target);
|
if (err < 0) {
|
pr_debug("Not enough memory to create thread/cpu maps\n");
|
return err;
|
}
|
|
err = perf_evlist__prepare_workload(evlist, &target, argv, false, NULL);
|
if (err < 0) {
|
pr_debug("Couldn't run the workload!\n");
|
return err;
|
}
|
|
evsel->attr.enable_on_exec = 1;
|
|
err = perf_evlist__open(evlist);
|
if (err < 0) {
|
pr_debug("perf_evlist__open: %s\n",
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
return err;
|
}
|
|
return perf_evlist__start_workload(evlist) == 1 ? TEST_OK : TEST_FAIL;
|
}
|
|
static int detach__enable_on_exec(struct perf_evlist *evlist)
|
{
|
waitpid(evlist->workload.pid, NULL, 0);
|
return 0;
|
}
|
|
static int attach__current_disabled(struct perf_evlist *evlist)
|
{
|
struct perf_evsel *evsel = perf_evlist__last(evlist);
|
struct thread_map *threads;
|
int err;
|
|
pr_debug("attaching to current thread as disabled\n");
|
|
threads = thread_map__new(-1, getpid(), UINT_MAX);
|
if (threads == NULL) {
|
pr_debug("thread_map__new\n");
|
return -1;
|
}
|
|
evsel->attr.disabled = 1;
|
|
err = perf_evsel__open_per_thread(evsel, threads);
|
if (err) {
|
pr_debug("Failed to open event cpu-clock:u\n");
|
return err;
|
}
|
|
thread_map__put(threads);
|
return perf_evsel__enable(evsel) == 0 ? TEST_OK : TEST_FAIL;
|
}
|
|
static int attach__current_enabled(struct perf_evlist *evlist)
|
{
|
struct perf_evsel *evsel = perf_evlist__last(evlist);
|
struct thread_map *threads;
|
int err;
|
|
pr_debug("attaching to current thread as enabled\n");
|
|
threads = thread_map__new(-1, getpid(), UINT_MAX);
|
if (threads == NULL) {
|
pr_debug("failed to call thread_map__new\n");
|
return -1;
|
}
|
|
err = perf_evsel__open_per_thread(evsel, threads);
|
|
thread_map__put(threads);
|
return err == 0 ? TEST_OK : TEST_FAIL;
|
}
|
|
static int detach__disable(struct perf_evlist *evlist)
|
{
|
struct perf_evsel *evsel = perf_evlist__last(evlist);
|
|
return perf_evsel__enable(evsel);
|
}
|
|
static int attach__cpu_disabled(struct perf_evlist *evlist)
|
{
|
struct perf_evsel *evsel = perf_evlist__last(evlist);
|
struct cpu_map *cpus;
|
int err;
|
|
pr_debug("attaching to CPU 0 as enabled\n");
|
|
cpus = cpu_map__new("0");
|
if (cpus == NULL) {
|
pr_debug("failed to call cpu_map__new\n");
|
return -1;
|
}
|
|
evsel->attr.disabled = 1;
|
|
err = perf_evsel__open_per_cpu(evsel, cpus);
|
if (err) {
|
if (err == -EACCES)
|
return TEST_SKIP;
|
|
pr_debug("Failed to open event cpu-clock:u\n");
|
return err;
|
}
|
|
cpu_map__put(cpus);
|
return perf_evsel__enable(evsel);
|
}
|
|
static int attach__cpu_enabled(struct perf_evlist *evlist)
|
{
|
struct perf_evsel *evsel = perf_evlist__last(evlist);
|
struct cpu_map *cpus;
|
int err;
|
|
pr_debug("attaching to CPU 0 as enabled\n");
|
|
cpus = cpu_map__new("0");
|
if (cpus == NULL) {
|
pr_debug("failed to call cpu_map__new\n");
|
return -1;
|
}
|
|
err = perf_evsel__open_per_cpu(evsel, cpus);
|
if (err == -EACCES)
|
return TEST_SKIP;
|
|
cpu_map__put(cpus);
|
return err ? TEST_FAIL : TEST_OK;
|
}
|
|
static int test_times(int (attach)(struct perf_evlist *),
|
int (detach)(struct perf_evlist *))
|
{
|
struct perf_counts_values count;
|
struct perf_evlist *evlist = NULL;
|
struct perf_evsel *evsel;
|
int err = -1, i;
|
|
evlist = perf_evlist__new();
|
if (!evlist) {
|
pr_debug("failed to create event list\n");
|
goto out_err;
|
}
|
|
err = parse_events(evlist, "cpu-clock:u", NULL);
|
if (err) {
|
pr_debug("failed to parse event cpu-clock:u\n");
|
goto out_err;
|
}
|
|
evsel = perf_evlist__last(evlist);
|
evsel->attr.read_format |=
|
PERF_FORMAT_TOTAL_TIME_ENABLED |
|
PERF_FORMAT_TOTAL_TIME_RUNNING;
|
|
err = attach(evlist);
|
if (err == TEST_SKIP) {
|
pr_debug(" SKIP : not enough rights\n");
|
return err;
|
}
|
|
TEST_ASSERT_VAL("failed to attach", !err);
|
|
for (i = 0; i < 100000000; i++) { }
|
|
TEST_ASSERT_VAL("failed to detach", !detach(evlist));
|
|
perf_evsel__read(evsel, 0, 0, &count);
|
|
err = !(count.ena == count.run);
|
|
pr_debug(" %s: ena %" PRIu64", run %" PRIu64"\n",
|
!err ? "OK " : "FAILED",
|
count.ena, count.run);
|
|
out_err:
|
perf_evlist__delete(evlist);
|
return !err ? TEST_OK : TEST_FAIL;
|
}
|
|
/*
|
* This test creates software event 'cpu-clock'
|
* attaches it in several ways (explained below)
|
* and checks that enabled and running times
|
* match.
|
*/
|
int test__event_times(struct test *test __maybe_unused, int subtest __maybe_unused)
|
{
|
int err, ret = 0;
|
|
#define _T(attach, detach) \
|
err = test_times(attach, detach); \
|
if (err && (ret == TEST_OK || ret == TEST_SKIP)) \
|
ret = err;
|
|
/* attach on newly spawned process after exec */
|
_T(attach__enable_on_exec, detach__enable_on_exec)
|
/* attach on current process as enabled */
|
_T(attach__current_enabled, detach__disable)
|
/* attach on current process as disabled */
|
_T(attach__current_disabled, detach__disable)
|
/* attach on cpu as disabled */
|
_T(attach__cpu_disabled, detach__disable)
|
/* attach on cpu as enabled */
|
_T(attach__cpu_enabled, detach__disable)
|
|
#undef _T
|
return ret;
|
}
|
