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