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![John Garry](/assets/img/avatar_default.png)
Add a function to find the common PMU map for the system. For arm64, a special variant is added. This is because arm64 supports heterogeneous CPU systems. As such, it cannot be guaranteed that the cpumap is same for all CPUs. So in case of heterogeneous systems, don't return a cpumap. Reviewed-by: Kajol Jain <kjain@linux.ibm.com> Signed-off-by: John Garry <john.garry@huawei.com> Tested-by: Paul A. Clarke <pc@us.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: Will Deacon <will@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxarm@huawei.com Link: https://lore.kernel.org/r/1617791570-165223-4-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
759 lines
17 KiB
C
759 lines
17 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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#include "metricgroup.h"
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struct perf_pmu_test_event {
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/* used for matching against events from generated pmu-events.c */
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struct pmu_event event;
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/* used for matching against event aliases */
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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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{
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.event = {
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.name = "l3_cache_rd",
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.event = "event=0x40",
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.desc = "L3 cache access, read",
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.long_desc = "Attributable Level 3 cache access, read",
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.topic = "cache",
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},
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.alias_str = "event=0x40",
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.alias_long_desc = "Attributable Level 3 cache access, read",
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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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struct perf_pmu_alias *a, *tmp;
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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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list_for_each_entry_safe(a, tmp, &aliases, list) {
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list_del(&a->list);
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perf_pmu_free_alias(a);
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}
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free(pmu);
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return res;
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}
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/* Test that aliases generated are as expected */
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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, struct parse_events_error *error,
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struct perf_pmu *fake_pmu)
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{
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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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if (!evlist)
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return -ENOMEM;
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ret = __parse_events(evlist, id, error, fake_pmu);
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evlist__delete(evlist);
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return ret;
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}
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static int check_parse_cpu(const char *id, bool same_cpu, struct pmu_event *pe)
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{
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struct parse_events_error error = { .idx = 0, };
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int ret = check_parse_id(id, &error, NULL);
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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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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 int check_parse_fake(const char *id)
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{
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struct parse_events_error error = { .idx = 0, };
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int ret = check_parse_id(id, &error, &perf_pmu__fake);
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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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struct metric {
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struct list_head list;
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struct metric_ref metric_ref;
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};
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static int resolve_metric_simple(struct expr_parse_ctx *pctx,
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struct list_head *compound_list,
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struct pmu_events_map *map,
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const char *metric_name)
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{
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struct hashmap_entry *cur, *cur_tmp;
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struct metric *metric, *tmp;
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size_t bkt;
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bool all;
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int rc;
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do {
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all = true;
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hashmap__for_each_entry_safe((&pctx->ids), cur, cur_tmp, bkt) {
|
|
struct metric_ref *ref;
|
|
struct pmu_event *pe;
|
|
|
|
pe = metricgroup__find_metric(cur->key, map);
|
|
if (!pe)
|
|
continue;
|
|
|
|
if (!strcmp(metric_name, (char *)cur->key)) {
|
|
pr_warning("Recursion detected for metric %s\n", metric_name);
|
|
rc = -1;
|
|
goto out_err;
|
|
}
|
|
|
|
all = false;
|
|
|
|
/* The metric key itself needs to go out.. */
|
|
expr__del_id(pctx, cur->key);
|
|
|
|
metric = malloc(sizeof(*metric));
|
|
if (!metric) {
|
|
rc = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
|
|
ref = &metric->metric_ref;
|
|
ref->metric_name = pe->metric_name;
|
|
ref->metric_expr = pe->metric_expr;
|
|
list_add_tail(&metric->list, compound_list);
|
|
|
|
rc = expr__find_other(pe->metric_expr, NULL, pctx, 0);
|
|
if (rc)
|
|
goto out_err;
|
|
break; /* The hashmap has been modified, so restart */
|
|
}
|
|
} while (!all);
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
list_for_each_entry_safe(metric, tmp, compound_list, list)
|
|
free(metric);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
static int test_parsing(void)
|
|
{
|
|
struct pmu_events_map *cpus_map = pmu_events_map__find();
|
|
struct pmu_events_map *map;
|
|
struct pmu_event *pe;
|
|
int i, j, k;
|
|
int ret = 0;
|
|
struct expr_parse_ctx ctx;
|
|
double result;
|
|
|
|
i = 0;
|
|
for (;;) {
|
|
map = &pmu_events_map[i++];
|
|
if (!map->table)
|
|
break;
|
|
j = 0;
|
|
for (;;) {
|
|
struct metric *metric, *tmp;
|
|
struct hashmap_entry *cur;
|
|
LIST_HEAD(compound_list);
|
|
size_t bkt;
|
|
|
|
pe = &map->table[j++];
|
|
if (!pe->name && !pe->metric_group && !pe->metric_name)
|
|
break;
|
|
if (!pe->metric_expr)
|
|
continue;
|
|
expr__ctx_init(&ctx);
|
|
if (expr__find_other(pe->metric_expr, NULL, &ctx, 0)
|
|
< 0) {
|
|
expr_failure("Parse other failed", map, pe);
|
|
ret++;
|
|
continue;
|
|
}
|
|
|
|
if (resolve_metric_simple(&ctx, &compound_list, map,
|
|
pe->metric_name)) {
|
|
expr_failure("Could not resolve metrics", map, pe);
|
|
ret++;
|
|
goto exit; /* Don't tolerate errors due to severity */
|
|
}
|
|
|
|
/*
|
|
* Add all ids with a made up value. The value may
|
|
* trigger divide by zero when subtracted and so try to
|
|
* make them unique.
|
|
*/
|
|
k = 1;
|
|
hashmap__for_each_entry((&ctx.ids), cur, bkt)
|
|
expr__add_id_val(&ctx, strdup(cur->key), k++);
|
|
|
|
hashmap__for_each_entry((&ctx.ids), cur, bkt) {
|
|
if (check_parse_cpu(cur->key, map == cpus_map,
|
|
pe))
|
|
ret++;
|
|
}
|
|
|
|
list_for_each_entry_safe(metric, tmp, &compound_list, list) {
|
|
expr__add_ref(&ctx, &metric->metric_ref);
|
|
free(metric);
|
|
}
|
|
|
|
if (expr__parse(&result, &ctx, pe->metric_expr, 0)) {
|
|
expr_failure("Parse failed", map, pe);
|
|
ret++;
|
|
}
|
|
expr__ctx_clear(&ctx);
|
|
}
|
|
}
|
|
/* TODO: fail when not ok */
|
|
exit:
|
|
return ret == 0 ? TEST_OK : TEST_SKIP;
|
|
}
|
|
|
|
struct test_metric {
|
|
const char *str;
|
|
};
|
|
|
|
static struct test_metric metrics[] = {
|
|
{ "(unc_p_power_state_occupancy.cores_c0 / unc_p_clockticks) * 100." },
|
|
{ "imx8_ddr0@read\\-cycles@ * 4 * 4", },
|
|
{ "imx8_ddr0@axid\\-read\\,axi_mask\\=0xffff\\,axi_id\\=0x0000@ * 4", },
|
|
{ "(cstate_pkg@c2\\-residency@ / msr@tsc@) * 100", },
|
|
{ "(imx8_ddr0@read\\-cycles@ + imx8_ddr0@write\\-cycles@)", },
|
|
};
|
|
|
|
static int metric_parse_fake(const char *str)
|
|
{
|
|
struct expr_parse_ctx ctx;
|
|
struct hashmap_entry *cur;
|
|
double result;
|
|
int ret = -1;
|
|
size_t bkt;
|
|
int i;
|
|
|
|
pr_debug("parsing '%s'\n", str);
|
|
|
|
expr__ctx_init(&ctx);
|
|
if (expr__find_other(str, NULL, &ctx, 0) < 0) {
|
|
pr_err("expr__find_other failed\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Add all ids with a made up value. The value may
|
|
* trigger divide by zero when subtracted and so try to
|
|
* make them unique.
|
|
*/
|
|
i = 1;
|
|
hashmap__for_each_entry((&ctx.ids), cur, bkt)
|
|
expr__add_id_val(&ctx, strdup(cur->key), i++);
|
|
|
|
hashmap__for_each_entry((&ctx.ids), cur, bkt) {
|
|
if (check_parse_fake(cur->key)) {
|
|
pr_err("check_parse_fake failed\n");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (expr__parse(&result, &ctx, str, 0))
|
|
pr_err("expr__parse failed\n");
|
|
else
|
|
ret = 0;
|
|
|
|
out:
|
|
expr__ctx_clear(&ctx);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Parse all the metrics for current architecture,
|
|
* or all defined cpus via the 'fake_pmu'
|
|
* in parse_events.
|
|
*/
|
|
static int test_parsing_fake(void)
|
|
{
|
|
struct pmu_events_map *map;
|
|
struct pmu_event *pe;
|
|
unsigned int i, j;
|
|
int err = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(metrics); i++) {
|
|
err = metric_parse_fake(metrics[i].str);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
i = 0;
|
|
for (;;) {
|
|
map = &pmu_events_map[i++];
|
|
if (!map->table)
|
|
break;
|
|
j = 0;
|
|
for (;;) {
|
|
pe = &map->table[j++];
|
|
if (!pe->name && !pe->metric_group && !pe->metric_name)
|
|
break;
|
|
if (!pe->metric_expr)
|
|
continue;
|
|
err = metric_parse_fake(pe->metric_expr);
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct {
|
|
int (*func)(void);
|
|
const char *desc;
|
|
} pmu_events_testcase_table[] = {
|
|
{
|
|
.func = test_pmu_event_table,
|
|
.desc = "PMU event table sanity",
|
|
},
|
|
{
|
|
.func = test_aliases,
|
|
.desc = "PMU event map aliases",
|
|
},
|
|
{
|
|
.func = test_parsing,
|
|
.desc = "Parsing of PMU event table metrics",
|
|
},
|
|
{
|
|
.func = test_parsing_fake,
|
|
.desc = "Parsing of PMU event table metrics with fake PMUs",
|
|
},
|
|
};
|
|
|
|
const char *test__pmu_events_subtest_get_desc(int subtest)
|
|
{
|
|
if (subtest < 0 ||
|
|
subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table))
|
|
return NULL;
|
|
return pmu_events_testcase_table[subtest].desc;
|
|
}
|
|
|
|
const char *test__pmu_events_subtest_skip_reason(int subtest)
|
|
{
|
|
if (subtest < 0 ||
|
|
subtest >= (int)ARRAY_SIZE(pmu_events_testcase_table))
|
|
return NULL;
|
|
if (pmu_events_testcase_table[subtest].func != test_parsing)
|
|
return NULL;
|
|
return "some metrics failed";
|
|
}
|
|
|
|
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();
|
|
}
|