// SPDX-License-Identifier: GPL-2.0
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <linux/perf_event.h>
#include <linux/kernel.h>
#include <perf/cpumap.h>
#include <perf/threadmap.h>
#include <perf/evsel.h>
#include <internal/evsel.h>
#include <internal/tests.h>
#include "tests.h"
static int libperf_print(enum libperf_print_level level,
const char *fmt, va_list ap)
{
return vfprintf(stderr, fmt, ap);
}
static int test_stat_cpu(void)
{
struct perf_cpu_map *cpus;
struct perf_evsel *evsel;
struct perf_event_attr attr = {
.type = PERF_TYPE_SOFTWARE,
.config = PERF_COUNT_SW_CPU_CLOCK,
};
int err, idx;
cpus = perf_cpu_map__new_online_cpus();
__T("failed to create cpus", cpus);
evsel = perf_evsel__new(&attr);
__T("failed to create evsel", evsel);
err = perf_evsel__open(evsel, cpus, NULL);
__T("failed to open evsel", err == 0);
for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) {
struct perf_counts_values counts = { .val = 0 };
perf_evsel__read(evsel, idx, 0, &counts);
__T("failed to read value for evsel", counts.val != 0);
}
perf_evsel__close(evsel);
perf_evsel__delete(evsel);
perf_cpu_map__put(cpus);
return 0;
}
static int test_stat_thread(void)
{
struct perf_counts_values counts = { .val = 0 };
struct perf_thread_map *threads;
struct perf_evsel *evsel;
struct perf_event_attr attr = {
.type = PERF_TYPE_SOFTWARE,
.config = PERF_COUNT_SW_TASK_CLOCK,
};
int err;
threads = perf_thread_map__new_dummy();
__T("failed to create threads", threads);
perf_thread_map__set_pid(threads, 0, 0);
evsel = perf_evsel__new(&attr);
__T("failed to create evsel", evsel);
err = perf_evsel__open(evsel, NULL, threads);
__T("failed to open evsel", err == 0);
perf_evsel__read(evsel, 0, 0, &counts);
__T("failed to read value for evsel", counts.val != 0);
perf_evsel__close(evsel);
perf_evsel__delete(evsel);
perf_thread_map__put(threads);
return 0;
}
static int test_stat_thread_enable(void)
{
struct perf_counts_values counts = { .val = 0 };
struct perf_thread_map *threads;
struct perf_evsel *evsel;
struct perf_event_attr attr = {
.type = PERF_TYPE_SOFTWARE,
.config = PERF_COUNT_SW_TASK_CLOCK,
.disabled = 1,
};
int err;
threads = perf_thread_map__new_dummy();
__T("failed to create threads", threads);
perf_thread_map__set_pid(threads, 0, 0);
evsel = perf_evsel__new(&attr);
__T("failed to create evsel", evsel);
err = perf_evsel__open(evsel, NULL, threads);
__T("failed to open evsel", err == 0);
perf_evsel__read(evsel, 0, 0, &counts);
__T("failed to read value for evsel", counts.val == 0);
err = perf_evsel__enable(evsel);
__T("failed to enable evsel", err == 0);
perf_evsel__read(evsel, 0, 0, &counts);
__T("failed to read value for evsel", counts.val != 0);
err = perf_evsel__disable(evsel);
__T("failed to enable evsel", err == 0);
perf_evsel__close(evsel);
perf_evsel__delete(evsel);
perf_thread_map__put(threads);
return 0;
}
static int test_stat_user_read(int event)
{
struct perf_counts_values counts = { .val = 0 };
struct perf_thread_map *threads;
struct perf_evsel *evsel;
struct perf_event_mmap_page *pc;
struct perf_event_attr attr = {
.type = PERF_TYPE_HARDWARE,
.config = event,
#ifdef __aarch64__
.config1 = 0x2, /* Request user access */
#endif
};
int err, i;
threads = perf_thread_map__new_dummy();
__T("failed to create threads", threads);
perf_thread_map__set_pid(threads, 0, 0);
evsel = perf_evsel__new(&attr);
__T("failed to create evsel", evsel);
err = perf_evsel__open(evsel, NULL, threads);
__T("failed to open evsel", err == 0);
err = perf_evsel__mmap(evsel, 0);
__T("failed to mmap evsel", err == 0);
pc = perf_evsel__mmap_base(evsel, 0, 0);
__T("failed to get mmapped address", pc);
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
__T("userspace counter access not supported", pc->cap_user_rdpmc);
__T("userspace counter access not enabled", pc->index);
__T("userspace counter width not set", pc->pmc_width >= 32);
#endif
perf_evsel__read(evsel, 0, 0, &counts);
__T("failed to read value for evsel", counts.val != 0);
for (i = 0; i < 5; i++) {
volatile int count = 0x10000 << i;
__u64 start, end, last = 0;
__T_VERBOSE("\tloop = %u, ", count);
perf_evsel__read(evsel, 0, 0, &counts);
start = counts.val;
while (count--) ;
perf_evsel__read(evsel, 0, 0, &counts);
end = counts.val;
__T("invalid counter data", (end - start) > last);
last = end - start;
__T_VERBOSE("count = %llu\n", end - start);
}
perf_evsel__munmap(evsel);
perf_evsel__close(evsel);
perf_evsel__delete(evsel);
perf_thread_map__put(threads);
return 0;
}
static int test_stat_read_format_single(struct perf_event_attr *attr, struct perf_thread_map *threads)
{
struct perf_evsel *evsel;
struct perf_counts_values counts;
volatile int count = 0x100000;
int err;
evsel = perf_evsel__new(attr);
__T("failed to create evsel", evsel);
/* skip old kernels that don't support the format */
err = perf_evsel__open(evsel, NULL, threads);
if (err < 0)
return 0;
while (count--) ;
memset(&counts, -1, sizeof(counts));
perf_evsel__read(evsel, 0, 0, &counts);
__T("failed to read value", counts.val);
if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
__T("failed to read TOTAL_TIME_ENABLED", counts.ena);
if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
__T("failed to read TOTAL_TIME_RUNNING", counts.run);
if (attr->read_format & PERF_FORMAT_ID)
__T("failed to read ID", counts.id);
if (attr->read_format & PERF_FORMAT_LOST)
__T("failed to read LOST", counts.lost == 0);
perf_evsel__close(evsel);
perf_evsel__delete(evsel);
return 0;
}
static int test_stat_read_format_group(struct perf_event_attr *attr, struct perf_thread_map *threads)
{
struct perf_evsel *leader, *member;
struct perf_counts_values counts;
volatile int count = 0x100000;
int err;
attr->read_format |= PERF_FORMAT_GROUP;
leader = perf_evsel__new(attr);
__T("failed to create leader", leader);
attr->read_format &= ~PERF_FORMAT_GROUP;
member = perf_evsel__new(attr);
__T("failed to create member", member);
member->leader = leader;
leader->nr_members = 2;
/* skip old kernels that don't support the format */
err = perf_evsel__open(leader, NULL, threads);
if (err < 0)
return 0;
err = perf_evsel__open(member, NULL, threads);
if (err < 0)
return 0;
while (count--) ;
memset(&counts, -1, sizeof(counts));
perf_evsel__read(leader, 0, 0, &counts);
__T("failed to read leader value", counts.val);
if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
__T("failed to read leader TOTAL_TIME_ENABLED", counts.ena);
if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
__T("failed to read leader TOTAL_TIME_RUNNING", counts.run);
if (attr->read_format & PERF_FORMAT_ID)
__T("failed to read leader ID", counts.id);
if (attr->read_format & PERF_FORMAT_LOST)
__T("failed to read leader LOST", counts.lost == 0);
memset(&counts, -1, sizeof(counts));
perf_evsel__read(member, 0, 0, &counts);
__T("failed to read member value", counts.val);
if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
__T("failed to read member TOTAL_TIME_ENABLED", counts.ena);
if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
__T("failed to read member TOTAL_TIME_RUNNING", counts.run);
if (attr->read_format & PERF_FORMAT_ID)
__T("failed to read member ID", counts.id);
if (attr->read_format & PERF_FORMAT_LOST)
__T("failed to read member LOST", counts.lost == 0);
perf_evsel__close(member);
perf_evsel__close(leader);
perf_evsel__delete(member);
perf_evsel__delete(leader);
return 0;
}
static int test_stat_read_format(void)
{
struct perf_thread_map *threads;
struct perf_event_attr attr = {
.type = PERF_TYPE_SOFTWARE,
.config = PERF_COUNT_SW_TASK_CLOCK,
};
int err, i;
#define FMT(_fmt) PERF_FORMAT_ ## _fmt
#define FMT_TIME (FMT(TOTAL_TIME_ENABLED) | FMT(TOTAL_TIME_RUNNING))
uint64_t test_formats [] = {
0,
FMT_TIME,
FMT(ID),
FMT(LOST),
FMT_TIME | FMT(ID),
FMT_TIME | FMT(LOST),
FMT_TIME | FMT(ID) | FMT(LOST),
FMT(ID) | FMT(LOST),
};
#undef FMT
#undef FMT_TIME
threads = perf_thread_map__new_dummy();
__T("failed to create threads", threads);
perf_thread_map__set_pid(threads, 0, 0);
for (i = 0; i < (int)ARRAY_SIZE(test_formats); i++) {
attr.read_format = test_formats[i];
__T_VERBOSE("testing single read with read_format: %lx\n",
(unsigned long)test_formats[i]);
err = test_stat_read_format_single(&attr, threads);
__T("failed to read single format", err == 0);
}
perf_thread_map__put(threads);
threads = perf_thread_map__new_array(2, NULL);
__T("failed to create threads", threads);
perf_thread_map__set_pid(threads, 0, 0);
perf_thread_map__set_pid(threads, 1, 0);
for (i = 0; i < (int)ARRAY_SIZE(test_formats); i++) {
attr.read_format = test_formats[i];
__T_VERBOSE("testing group read with read_format: %lx\n",
(unsigned long)test_formats[i]);
err = test_stat_read_format_group(&attr, threads);
__T("failed to read group format", err == 0);
}
perf_thread_map__put(threads);
return 0;
}
int test_evsel(int argc, char **argv)
{
__T_START;
libperf_init(libperf_print);
test_stat_cpu();
test_stat_thread();
test_stat_thread_enable();
test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS);
test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES);
test_stat_read_format();
__T_END;
return tests_failed == 0 ? 0 : -1;
}
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