541 строка
13 KiB
C
541 строка
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "math.h"
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#include "parse-events.h"
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#include "pmu.h"
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#include "tests.h"
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#include <errno.h>
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#include <stdio.h>
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#include <linux/kernel.h>
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#include <linux/zalloc.h>
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#include "debug.h"
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#include "../pmu-events/pmu-events.h"
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#include "util/evlist.h"
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#include "util/expr.h"
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#include "util/parse-events.h"
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struct perf_pmu_test_event {
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struct pmu_event event;
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/* extra events for aliases */
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const char *alias_str;
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/*
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* Note: For when PublicDescription does not exist in the JSON, we
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* will have no long_desc in pmu_event.long_desc, but long_desc may
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* be set in the alias.
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*/
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const char *alias_long_desc;
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};
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static struct perf_pmu_test_event test_cpu_events[] = {
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{
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.event = {
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.name = "bp_l1_btb_correct",
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.event = "event=0x8a",
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.desc = "L1 BTB Correction",
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.topic = "branch",
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},
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.alias_str = "event=0x8a",
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.alias_long_desc = "L1 BTB Correction",
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},
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{
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.event = {
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.name = "bp_l2_btb_correct",
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.event = "event=0x8b",
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.desc = "L2 BTB Correction",
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.topic = "branch",
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},
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.alias_str = "event=0x8b",
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.alias_long_desc = "L2 BTB Correction",
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},
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{
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.event = {
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.name = "segment_reg_loads.any",
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.event = "umask=0x80,period=200000,event=0x6",
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.desc = "Number of segment register loads",
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.topic = "other",
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},
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.alias_str = "umask=0x80,(null)=0x30d40,event=0x6",
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.alias_long_desc = "Number of segment register loads",
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},
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{
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.event = {
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.name = "dispatch_blocked.any",
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.event = "umask=0x20,period=200000,event=0x9",
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.desc = "Memory cluster signals to block micro-op dispatch for any reason",
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.topic = "other",
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},
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.alias_str = "umask=0x20,(null)=0x30d40,event=0x9",
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.alias_long_desc = "Memory cluster signals to block micro-op dispatch for any reason",
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},
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{
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.event = {
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.name = "eist_trans",
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.event = "umask=0x0,period=200000,event=0x3a",
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.desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
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.topic = "other",
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},
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.alias_str = "umask=0,(null)=0x30d40,event=0x3a",
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.alias_long_desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
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},
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{ /* sentinel */
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.event = {
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.name = NULL,
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},
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},
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};
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static struct perf_pmu_test_event test_uncore_events[] = {
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{
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.event = {
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.name = "uncore_hisi_ddrc.flux_wcmd",
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.event = "event=0x2",
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.desc = "DDRC write commands. Unit: hisi_sccl,ddrc ",
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.topic = "uncore",
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.long_desc = "DDRC write commands",
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.pmu = "hisi_sccl,ddrc",
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},
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.alias_str = "event=0x2",
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.alias_long_desc = "DDRC write commands",
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},
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{
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.event = {
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.name = "unc_cbo_xsnp_response.miss_eviction",
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.event = "umask=0x81,event=0x22",
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.desc = "Unit: uncore_cbox A cross-core snoop resulted from L3 Eviction which misses in some processor core",
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.topic = "uncore",
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.long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
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.pmu = "uncore_cbox",
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},
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.alias_str = "umask=0x81,event=0x22",
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.alias_long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
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},
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{ /* sentinel */
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.event = {
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.name = NULL,
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},
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}
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};
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const int total_test_events_size = ARRAY_SIZE(test_uncore_events);
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static bool is_same(const char *reference, const char *test)
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{
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if (!reference && !test)
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return true;
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if (reference && !test)
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return false;
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if (!reference && test)
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return false;
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return !strcmp(reference, test);
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}
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static struct pmu_events_map *__test_pmu_get_events_map(void)
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{
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struct pmu_events_map *map;
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for (map = &pmu_events_map[0]; map->cpuid; map++) {
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if (!strcmp(map->cpuid, "testcpu"))
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return map;
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}
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pr_err("could not find test events map\n");
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return NULL;
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}
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/* Verify generated events from pmu-events.c is as expected */
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static int test_pmu_event_table(void)
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{
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struct pmu_events_map *map = __test_pmu_get_events_map();
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struct pmu_event *table;
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int map_events = 0, expected_events;
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/* ignore 2x sentinels */
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expected_events = ARRAY_SIZE(test_cpu_events) +
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ARRAY_SIZE(test_uncore_events) - 2;
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if (!map)
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return -1;
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for (table = map->table; table->name; table++) {
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struct perf_pmu_test_event *test;
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struct pmu_event *te;
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bool found = false;
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if (table->pmu)
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test = &test_uncore_events[0];
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else
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test = &test_cpu_events[0];
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te = &test->event;
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for (; te->name; test++, te = &test->event) {
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if (strcmp(table->name, te->name))
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continue;
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found = true;
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map_events++;
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if (!is_same(table->desc, te->desc)) {
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pr_debug2("testing event table %s: mismatched desc, %s vs %s\n",
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table->name, table->desc, te->desc);
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return -1;
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}
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if (!is_same(table->topic, te->topic)) {
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pr_debug2("testing event table %s: mismatched topic, %s vs %s\n",
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table->name, table->topic,
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te->topic);
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return -1;
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}
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if (!is_same(table->long_desc, te->long_desc)) {
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pr_debug2("testing event table %s: mismatched long_desc, %s vs %s\n",
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table->name, table->long_desc,
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te->long_desc);
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return -1;
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}
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if (!is_same(table->unit, te->unit)) {
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pr_debug2("testing event table %s: mismatched unit, %s vs %s\n",
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table->name, table->unit,
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te->unit);
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return -1;
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}
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if (!is_same(table->perpkg, te->perpkg)) {
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pr_debug2("testing event table %s: mismatched perpkg, %s vs %s\n",
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table->name, table->perpkg,
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te->perpkg);
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return -1;
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}
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if (!is_same(table->metric_expr, te->metric_expr)) {
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pr_debug2("testing event table %s: mismatched metric_expr, %s vs %s\n",
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table->name, table->metric_expr,
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te->metric_expr);
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return -1;
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}
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if (!is_same(table->metric_name, te->metric_name)) {
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pr_debug2("testing event table %s: mismatched metric_name, %s vs %s\n",
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table->name, table->metric_name,
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te->metric_name);
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return -1;
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}
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if (!is_same(table->deprecated, te->deprecated)) {
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pr_debug2("testing event table %s: mismatched deprecated, %s vs %s\n",
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table->name, table->deprecated,
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te->deprecated);
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return -1;
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}
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pr_debug("testing event table %s: pass\n", table->name);
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}
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if (!found) {
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pr_err("testing event table: could not find event %s\n",
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table->name);
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return -1;
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}
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}
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if (map_events != expected_events) {
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pr_err("testing event table: found %d, but expected %d\n",
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map_events, expected_events);
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return -1;
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}
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return 0;
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}
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static struct perf_pmu_alias *find_alias(const char *test_event, struct list_head *aliases)
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{
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struct perf_pmu_alias *alias;
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list_for_each_entry(alias, aliases, list)
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if (!strcmp(test_event, alias->name))
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return alias;
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return NULL;
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}
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/* Verify aliases are as expected */
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static int __test__pmu_event_aliases(char *pmu_name, int *count)
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{
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struct perf_pmu_test_event *test;
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struct pmu_event *te;
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struct perf_pmu *pmu;
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LIST_HEAD(aliases);
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int res = 0;
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bool use_uncore_table;
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struct pmu_events_map *map = __test_pmu_get_events_map();
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if (!map)
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return -1;
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if (is_pmu_core(pmu_name)) {
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test = &test_cpu_events[0];
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use_uncore_table = false;
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} else {
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test = &test_uncore_events[0];
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use_uncore_table = true;
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}
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pmu = zalloc(sizeof(*pmu));
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if (!pmu)
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return -1;
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pmu->name = pmu_name;
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pmu_add_cpu_aliases_map(&aliases, pmu, map);
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for (te = &test->event; te->name; test++, te = &test->event) {
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struct perf_pmu_alias *alias = find_alias(te->name, &aliases);
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if (!alias) {
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bool uncore_match = pmu_uncore_alias_match(pmu_name,
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te->pmu);
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if (use_uncore_table && !uncore_match) {
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pr_debug3("testing aliases PMU %s: skip matching alias %s\n",
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pmu_name, te->name);
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continue;
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}
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pr_debug2("testing aliases PMU %s: no alias, alias_table->name=%s\n",
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pmu_name, te->name);
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res = -1;
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break;
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}
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if (!is_same(alias->desc, te->desc)) {
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pr_debug2("testing aliases PMU %s: mismatched desc, %s vs %s\n",
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pmu_name, alias->desc, te->desc);
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res = -1;
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break;
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}
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if (!is_same(alias->long_desc, test->alias_long_desc)) {
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pr_debug2("testing aliases PMU %s: mismatched long_desc, %s vs %s\n",
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pmu_name, alias->long_desc,
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test->alias_long_desc);
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res = -1;
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break;
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}
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if (!is_same(alias->str, test->alias_str)) {
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pr_debug2("testing aliases PMU %s: mismatched str, %s vs %s\n",
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pmu_name, alias->str, test->alias_str);
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res = -1;
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break;
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}
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if (!is_same(alias->topic, te->topic)) {
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pr_debug2("testing aliases PMU %s: mismatched topic, %s vs %s\n",
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pmu_name, alias->topic, te->topic);
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res = -1;
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break;
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}
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(*count)++;
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pr_debug2("testing aliases PMU %s: matched event %s\n",
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pmu_name, alias->name);
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}
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free(pmu);
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return res;
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}
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static int test_aliases(void)
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{
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struct perf_pmu *pmu = NULL;
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while ((pmu = perf_pmu__scan(pmu)) != NULL) {
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int count = 0;
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if (list_empty(&pmu->format)) {
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pr_debug2("skipping testing PMU %s\n", pmu->name);
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continue;
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}
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if (__test__pmu_event_aliases(pmu->name, &count)) {
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pr_debug("testing PMU %s aliases: failed\n", pmu->name);
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return -1;
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}
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if (count == 0)
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pr_debug3("testing PMU %s aliases: no events to match\n",
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pmu->name);
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else
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pr_debug("testing PMU %s aliases: pass\n", pmu->name);
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}
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return 0;
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}
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static bool is_number(const char *str)
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{
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char *end_ptr;
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double v;
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errno = 0;
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v = strtod(str, &end_ptr);
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(void)v; // We're not interested in this value, only if it is valid
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return errno == 0 && end_ptr != str;
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}
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static int check_parse_id(const char *id, bool same_cpu, struct pmu_event *pe)
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{
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struct parse_events_error error;
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struct evlist *evlist;
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int ret;
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/* Numbers are always valid. */
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if (is_number(id))
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return 0;
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evlist = evlist__new();
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memset(&error, 0, sizeof(error));
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ret = parse_events(evlist, id, &error);
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if (ret && same_cpu) {
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pr_warning("Parse event failed metric '%s' id '%s' expr '%s'\n",
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pe->metric_name, id, pe->metric_expr);
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pr_warning("Error string '%s' help '%s'\n", error.str,
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error.help);
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} else if (ret) {
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pr_debug3("Parse event failed, but for an event that may not be supported by this CPU.\nid '%s' metric '%s' expr '%s'\n",
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id, pe->metric_name, pe->metric_expr);
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ret = 0;
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}
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evlist__delete(evlist);
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free(error.str);
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free(error.help);
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free(error.first_str);
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free(error.first_help);
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return ret;
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}
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static void expr_failure(const char *msg,
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const struct pmu_events_map *map,
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const struct pmu_event *pe)
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{
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pr_debug("%s for map %s %s %s\n",
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msg, map->cpuid, map->version, map->type);
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pr_debug("On metric %s\n", pe->metric_name);
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pr_debug("On expression %s\n", pe->metric_expr);
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}
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static int test_parsing(void)
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{
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struct pmu_events_map *cpus_map = perf_pmu__find_map(NULL);
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struct pmu_events_map *map;
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struct pmu_event *pe;
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int i, j, k;
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int ret = 0;
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struct expr_parse_ctx ctx;
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double result;
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i = 0;
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for (;;) {
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map = &pmu_events_map[i++];
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if (!map->table)
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break;
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j = 0;
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for (;;) {
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struct hashmap_entry *cur;
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size_t bkt;
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pe = &map->table[j++];
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if (!pe->name && !pe->metric_group && !pe->metric_name)
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break;
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if (!pe->metric_expr)
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continue;
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expr__ctx_init(&ctx);
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if (expr__find_other(pe->metric_expr, NULL, &ctx, 0)
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< 0) {
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expr_failure("Parse other failed", map, pe);
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ret++;
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continue;
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}
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/*
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* Add all ids with a made up value. The value may
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* trigger divide by zero when subtracted and so try to
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* make them unique.
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*/
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k = 1;
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hashmap__for_each_entry((&ctx.ids), cur, bkt)
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expr__add_id(&ctx, strdup(cur->key), k++);
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hashmap__for_each_entry((&ctx.ids), cur, bkt) {
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if (check_parse_id(cur->key, map == cpus_map,
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pe))
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ret++;
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}
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if (expr__parse(&result, &ctx, pe->metric_expr, 0)) {
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expr_failure("Parse failed", map, pe);
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ret++;
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}
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expr__ctx_clear(&ctx);
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}
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}
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/* TODO: fail when not ok */
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return ret == 0 ? TEST_OK : TEST_SKIP;
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}
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static const struct {
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int (*func)(void);
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const char *desc;
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} pmu_events_testcase_table[] = {
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{
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.func = test_pmu_event_table,
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.desc = "PMU event table sanity",
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},
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{
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.func = test_aliases,
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.desc = "PMU event map aliases",
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},
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{
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.func = test_parsing,
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.desc = "Parsing of PMU event table metrics",
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},
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};
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const char *test__pmu_events_subtest_get_desc(int subtest)
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{
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if (subtest < 0 ||
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subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table))
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return NULL;
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return pmu_events_testcase_table[subtest].desc;
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}
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const char *test__pmu_events_subtest_skip_reason(int subtest)
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{
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if (subtest < 0 ||
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subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table))
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return NULL;
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if (pmu_events_testcase_table[subtest].func != test_parsing)
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return NULL;
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return "some metrics failed";
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}
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int test__pmu_events_subtest_get_nr(void)
|
|
{
|
|
return (int)ARRAY_SIZE(pmu_events_testcase_table);
|
|
}
|
|
|
|
int test__pmu_events(struct test *test __maybe_unused, int subtest)
|
|
{
|
|
if (subtest < 0 ||
|
|
subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table))
|
|
return TEST_FAIL;
|
|
return pmu_events_testcase_table[subtest].func();
|
|
}
|