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// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/string.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <sys/wait.h>
#include <perf/cpumap.h>
#include "tests.h"
#include "evlist.h"
#include "evsel.h"
#include "debug.h"
#include "parse-events.h"
#include "thread_map.h"
#include "target.h"
static int attach__enable_on_exec(struct evlist *evlist)
{
struct evsel *evsel = 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->core.attr.enable_on_exec = 1;
err = 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 evlist *evlist)
{
waitpid(evlist->workload.pid, NULL, 0);
return 0;
}
static int attach__current_disabled(struct evlist *evlist)
{
struct evsel *evsel = evlist__last(evlist);
struct perf_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->core.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;
}
perf_thread_map__put(threads);
return evsel__enable(evsel) == 0 ? TEST_OK : TEST_FAIL;
}
static int attach__current_enabled(struct evlist *evlist)
{
struct evsel *evsel = evlist__last(evlist);
struct perf_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);
perf_thread_map__put(threads);
return err == 0 ? TEST_OK : TEST_FAIL;
}
static int detach__disable(struct evlist *evlist)
{
struct evsel *evsel = evlist__last(evlist);
return evsel__enable(evsel);
}
static int attach__cpu_disabled(struct evlist *evlist)
{
struct evsel *evsel = evlist__last(evlist);
struct perf_cpu_map *cpus;
int err;
pr_debug("attaching to CPU 0 as enabled\n");
cpus = perf_cpu_map__new("0");
if (cpus == NULL) {
pr_debug("failed to call perf_cpu_map__new\n");
return -1;
}
evsel->core.attr.disabled = 1;
err = perf_evsel__open_per_cpu(evsel, cpus, -1);
if (err) {
if (err == -EACCES)
return TEST_SKIP;
pr_debug("Failed to open event cpu-clock:u\n");
return err;
}
perf_cpu_map__put(cpus);
return evsel__enable(evsel);
}
static int attach__cpu_enabled(struct evlist *evlist)
{
struct evsel *evsel = evlist__last(evlist);
struct perf_cpu_map *cpus;
int err;
pr_debug("attaching to CPU 0 as enabled\n");
cpus = perf_cpu_map__new("0");
if (cpus == NULL) {
pr_debug("failed to call perf_cpu_map__new\n");
return -1;
}
err = perf_evsel__open_per_cpu(evsel, cpus, -1);
if (err == -EACCES)
return TEST_SKIP;
perf_cpu_map__put(cpus);
return err ? TEST_FAIL : TEST_OK;
}
static int test_times(int (attach)(struct evlist *),
int (detach)(struct evlist *))
{
struct perf_counts_values count;
struct evlist *evlist = NULL;
struct evsel *evsel;
int err = -1, i;
evlist = 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 = evlist__last(evlist);
evsel->core.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->core, 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:
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;
}
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