mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
6f844b1fdd
Make naming less error prone. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Garry <john.garry@huawei.com> Cc: Kajol Jain <kjain@linux.ibm.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: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Clarke <pc@us.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Riccardo Mancini <rickyman7@gmail.com> Cc: Stephane Eranian <eranian@google.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Vineet Singh <vineet.singh@intel.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: zhengjun.xing@intel.com Link: https://lore.kernel.org/r/20220105061351.120843-40-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
592 lines
14 KiB
C
592 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <errno.h>
|
|
#include <inttypes.h>
|
|
#include <math.h>
|
|
#include <string.h>
|
|
#include "counts.h"
|
|
#include "cpumap.h"
|
|
#include "debug.h"
|
|
#include "header.h"
|
|
#include "stat.h"
|
|
#include "session.h"
|
|
#include "target.h"
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "thread_map.h"
|
|
#include "hashmap.h"
|
|
#include <linux/zalloc.h>
|
|
|
|
void update_stats(struct stats *stats, u64 val)
|
|
{
|
|
double delta;
|
|
|
|
stats->n++;
|
|
delta = val - stats->mean;
|
|
stats->mean += delta / stats->n;
|
|
stats->M2 += delta*(val - stats->mean);
|
|
|
|
if (val > stats->max)
|
|
stats->max = val;
|
|
|
|
if (val < stats->min)
|
|
stats->min = val;
|
|
}
|
|
|
|
double avg_stats(struct stats *stats)
|
|
{
|
|
return stats->mean;
|
|
}
|
|
|
|
/*
|
|
* http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
|
|
*
|
|
* (\Sum n_i^2) - ((\Sum n_i)^2)/n
|
|
* s^2 = -------------------------------
|
|
* n - 1
|
|
*
|
|
* http://en.wikipedia.org/wiki/Stddev
|
|
*
|
|
* The std dev of the mean is related to the std dev by:
|
|
*
|
|
* s
|
|
* s_mean = -------
|
|
* sqrt(n)
|
|
*
|
|
*/
|
|
double stddev_stats(struct stats *stats)
|
|
{
|
|
double variance, variance_mean;
|
|
|
|
if (stats->n < 2)
|
|
return 0.0;
|
|
|
|
variance = stats->M2 / (stats->n - 1);
|
|
variance_mean = variance / stats->n;
|
|
|
|
return sqrt(variance_mean);
|
|
}
|
|
|
|
double rel_stddev_stats(double stddev, double avg)
|
|
{
|
|
double pct = 0.0;
|
|
|
|
if (avg)
|
|
pct = 100.0 * stddev/avg;
|
|
|
|
return pct;
|
|
}
|
|
|
|
bool __perf_stat_evsel__is(struct evsel *evsel, enum perf_stat_evsel_id id)
|
|
{
|
|
struct perf_stat_evsel *ps = evsel->stats;
|
|
|
|
return ps->id == id;
|
|
}
|
|
|
|
#define ID(id, name) [PERF_STAT_EVSEL_ID__##id] = #name
|
|
static const char *id_str[PERF_STAT_EVSEL_ID__MAX] = {
|
|
ID(NONE, x),
|
|
ID(CYCLES_IN_TX, cpu/cycles-t/),
|
|
ID(TRANSACTION_START, cpu/tx-start/),
|
|
ID(ELISION_START, cpu/el-start/),
|
|
ID(CYCLES_IN_TX_CP, cpu/cycles-ct/),
|
|
ID(TOPDOWN_TOTAL_SLOTS, topdown-total-slots),
|
|
ID(TOPDOWN_SLOTS_ISSUED, topdown-slots-issued),
|
|
ID(TOPDOWN_SLOTS_RETIRED, topdown-slots-retired),
|
|
ID(TOPDOWN_FETCH_BUBBLES, topdown-fetch-bubbles),
|
|
ID(TOPDOWN_RECOVERY_BUBBLES, topdown-recovery-bubbles),
|
|
ID(TOPDOWN_RETIRING, topdown-retiring),
|
|
ID(TOPDOWN_BAD_SPEC, topdown-bad-spec),
|
|
ID(TOPDOWN_FE_BOUND, topdown-fe-bound),
|
|
ID(TOPDOWN_BE_BOUND, topdown-be-bound),
|
|
ID(TOPDOWN_HEAVY_OPS, topdown-heavy-ops),
|
|
ID(TOPDOWN_BR_MISPREDICT, topdown-br-mispredict),
|
|
ID(TOPDOWN_FETCH_LAT, topdown-fetch-lat),
|
|
ID(TOPDOWN_MEM_BOUND, topdown-mem-bound),
|
|
ID(SMI_NUM, msr/smi/),
|
|
ID(APERF, msr/aperf/),
|
|
};
|
|
#undef ID
|
|
|
|
static void perf_stat_evsel_id_init(struct evsel *evsel)
|
|
{
|
|
struct perf_stat_evsel *ps = evsel->stats;
|
|
int i;
|
|
|
|
/* ps->id is 0 hence PERF_STAT_EVSEL_ID__NONE by default */
|
|
|
|
for (i = 0; i < PERF_STAT_EVSEL_ID__MAX; i++) {
|
|
if (!strcmp(evsel__name(evsel), id_str[i])) {
|
|
ps->id = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void evsel__reset_stat_priv(struct evsel *evsel)
|
|
{
|
|
int i;
|
|
struct perf_stat_evsel *ps = evsel->stats;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
init_stats(&ps->res_stats[i]);
|
|
|
|
perf_stat_evsel_id_init(evsel);
|
|
}
|
|
|
|
static int evsel__alloc_stat_priv(struct evsel *evsel)
|
|
{
|
|
evsel->stats = zalloc(sizeof(struct perf_stat_evsel));
|
|
if (evsel->stats == NULL)
|
|
return -ENOMEM;
|
|
evsel__reset_stat_priv(evsel);
|
|
return 0;
|
|
}
|
|
|
|
static void evsel__free_stat_priv(struct evsel *evsel)
|
|
{
|
|
struct perf_stat_evsel *ps = evsel->stats;
|
|
|
|
if (ps)
|
|
zfree(&ps->group_data);
|
|
zfree(&evsel->stats);
|
|
}
|
|
|
|
static int evsel__alloc_prev_raw_counts(struct evsel *evsel)
|
|
{
|
|
int cpu_map_nr = evsel__nr_cpus(evsel);
|
|
int nthreads = perf_thread_map__nr(evsel->core.threads);
|
|
struct perf_counts *counts;
|
|
|
|
counts = perf_counts__new(cpu_map_nr, nthreads);
|
|
if (counts)
|
|
evsel->prev_raw_counts = counts;
|
|
|
|
return counts ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void evsel__free_prev_raw_counts(struct evsel *evsel)
|
|
{
|
|
perf_counts__delete(evsel->prev_raw_counts);
|
|
evsel->prev_raw_counts = NULL;
|
|
}
|
|
|
|
static void evsel__reset_prev_raw_counts(struct evsel *evsel)
|
|
{
|
|
if (evsel->prev_raw_counts)
|
|
perf_counts__reset(evsel->prev_raw_counts);
|
|
}
|
|
|
|
static int evsel__alloc_stats(struct evsel *evsel, bool alloc_raw)
|
|
{
|
|
if (evsel__alloc_stat_priv(evsel) < 0 ||
|
|
evsel__alloc_counts(evsel) < 0 ||
|
|
(alloc_raw && evsel__alloc_prev_raw_counts(evsel) < 0))
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int evlist__alloc_stats(struct evlist *evlist, bool alloc_raw)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
if (evsel__alloc_stats(evsel, alloc_raw))
|
|
goto out_free;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_free:
|
|
evlist__free_stats(evlist);
|
|
return -1;
|
|
}
|
|
|
|
void evlist__free_stats(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
evsel__free_stat_priv(evsel);
|
|
evsel__free_counts(evsel);
|
|
evsel__free_prev_raw_counts(evsel);
|
|
}
|
|
}
|
|
|
|
void evlist__reset_stats(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
evsel__reset_stat_priv(evsel);
|
|
evsel__reset_counts(evsel);
|
|
}
|
|
}
|
|
|
|
void evlist__reset_prev_raw_counts(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
evsel__reset_prev_raw_counts(evsel);
|
|
}
|
|
|
|
static void evsel__copy_prev_raw_counts(struct evsel *evsel)
|
|
{
|
|
int ncpus = evsel__nr_cpus(evsel);
|
|
int nthreads = perf_thread_map__nr(evsel->core.threads);
|
|
|
|
for (int thread = 0; thread < nthreads; thread++) {
|
|
for (int cpu = 0; cpu < ncpus; cpu++) {
|
|
*perf_counts(evsel->counts, cpu, thread) =
|
|
*perf_counts(evsel->prev_raw_counts, cpu,
|
|
thread);
|
|
}
|
|
}
|
|
|
|
evsel->counts->aggr = evsel->prev_raw_counts->aggr;
|
|
}
|
|
|
|
void evlist__copy_prev_raw_counts(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(evlist, evsel)
|
|
evsel__copy_prev_raw_counts(evsel);
|
|
}
|
|
|
|
void evlist__save_aggr_prev_raw_counts(struct evlist *evlist)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
/*
|
|
* To collect the overall statistics for interval mode,
|
|
* we copy the counts from evsel->prev_raw_counts to
|
|
* evsel->counts. The perf_stat_process_counter creates
|
|
* aggr values from per cpu values, but the per cpu values
|
|
* are 0 for AGGR_GLOBAL. So we use a trick that saves the
|
|
* previous aggr value to the first member of perf_counts,
|
|
* then aggr calculation in process_counter_values can work
|
|
* correctly.
|
|
*/
|
|
evlist__for_each_entry(evlist, evsel) {
|
|
*perf_counts(evsel->prev_raw_counts, 0, 0) =
|
|
evsel->prev_raw_counts->aggr;
|
|
}
|
|
}
|
|
|
|
static size_t pkg_id_hash(const void *__key, void *ctx __maybe_unused)
|
|
{
|
|
uint64_t *key = (uint64_t *) __key;
|
|
|
|
return *key & 0xffffffff;
|
|
}
|
|
|
|
static bool pkg_id_equal(const void *__key1, const void *__key2,
|
|
void *ctx __maybe_unused)
|
|
{
|
|
uint64_t *key1 = (uint64_t *) __key1;
|
|
uint64_t *key2 = (uint64_t *) __key2;
|
|
|
|
return *key1 == *key2;
|
|
}
|
|
|
|
static int check_per_pkg(struct evsel *counter,
|
|
struct perf_counts_values *vals, int cpu, bool *skip)
|
|
{
|
|
struct hashmap *mask = counter->per_pkg_mask;
|
|
struct perf_cpu_map *cpus = evsel__cpus(counter);
|
|
int s, d, ret = 0;
|
|
uint64_t *key;
|
|
|
|
*skip = false;
|
|
|
|
if (!counter->per_pkg)
|
|
return 0;
|
|
|
|
if (perf_cpu_map__empty(cpus))
|
|
return 0;
|
|
|
|
if (!mask) {
|
|
mask = hashmap__new(pkg_id_hash, pkg_id_equal, NULL);
|
|
if (!mask)
|
|
return -ENOMEM;
|
|
|
|
counter->per_pkg_mask = mask;
|
|
}
|
|
|
|
/*
|
|
* we do not consider an event that has not run as a good
|
|
* instance to mark a package as used (skip=1). Otherwise
|
|
* we may run into a situation where the first CPU in a package
|
|
* is not running anything, yet the second is, and this function
|
|
* would mark the package as used after the first CPU and would
|
|
* not read the values from the second CPU.
|
|
*/
|
|
if (!(vals->run && vals->ena))
|
|
return 0;
|
|
|
|
s = cpu__get_socket_id(cpu);
|
|
if (s < 0)
|
|
return -1;
|
|
|
|
/*
|
|
* On multi-die system, die_id > 0. On no-die system, die_id = 0.
|
|
* We use hashmap(socket, die) to check the used socket+die pair.
|
|
*/
|
|
d = cpu__get_die_id(cpu);
|
|
if (d < 0)
|
|
return -1;
|
|
|
|
key = malloc(sizeof(*key));
|
|
if (!key)
|
|
return -ENOMEM;
|
|
|
|
*key = (uint64_t)d << 32 | s;
|
|
if (hashmap__find(mask, (void *)key, NULL)) {
|
|
*skip = true;
|
|
free(key);
|
|
} else
|
|
ret = hashmap__add(mask, (void *)key, (void *)1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
process_counter_values(struct perf_stat_config *config, struct evsel *evsel,
|
|
int cpu, int thread,
|
|
struct perf_counts_values *count)
|
|
{
|
|
struct perf_counts_values *aggr = &evsel->counts->aggr;
|
|
static struct perf_counts_values zero;
|
|
bool skip = false;
|
|
|
|
if (check_per_pkg(evsel, count, cpu, &skip)) {
|
|
pr_err("failed to read per-pkg counter\n");
|
|
return -1;
|
|
}
|
|
|
|
if (skip)
|
|
count = &zero;
|
|
|
|
switch (config->aggr_mode) {
|
|
case AGGR_THREAD:
|
|
case AGGR_CORE:
|
|
case AGGR_DIE:
|
|
case AGGR_SOCKET:
|
|
case AGGR_NODE:
|
|
case AGGR_NONE:
|
|
if (!evsel->snapshot)
|
|
evsel__compute_deltas(evsel, cpu, thread, count);
|
|
perf_counts_values__scale(count, config->scale, NULL);
|
|
if ((config->aggr_mode == AGGR_NONE) && (!evsel->percore)) {
|
|
perf_stat__update_shadow_stats(evsel, count->val,
|
|
cpu, &rt_stat);
|
|
}
|
|
|
|
if (config->aggr_mode == AGGR_THREAD) {
|
|
if (config->stats)
|
|
perf_stat__update_shadow_stats(evsel,
|
|
count->val, 0, &config->stats[thread]);
|
|
else
|
|
perf_stat__update_shadow_stats(evsel,
|
|
count->val, 0, &rt_stat);
|
|
}
|
|
break;
|
|
case AGGR_GLOBAL:
|
|
aggr->val += count->val;
|
|
aggr->ena += count->ena;
|
|
aggr->run += count->run;
|
|
case AGGR_UNSET:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int process_counter_maps(struct perf_stat_config *config,
|
|
struct evsel *counter)
|
|
{
|
|
int nthreads = perf_thread_map__nr(counter->core.threads);
|
|
int ncpus = evsel__nr_cpus(counter);
|
|
int cpu, thread;
|
|
|
|
if (counter->core.system_wide)
|
|
nthreads = 1;
|
|
|
|
for (thread = 0; thread < nthreads; thread++) {
|
|
for (cpu = 0; cpu < ncpus; cpu++) {
|
|
if (process_counter_values(config, counter, cpu, thread,
|
|
perf_counts(counter->counts, cpu, thread)))
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_stat_process_counter(struct perf_stat_config *config,
|
|
struct evsel *counter)
|
|
{
|
|
struct perf_counts_values *aggr = &counter->counts->aggr;
|
|
struct perf_stat_evsel *ps = counter->stats;
|
|
u64 *count = counter->counts->aggr.values;
|
|
int i, ret;
|
|
|
|
aggr->val = aggr->ena = aggr->run = 0;
|
|
|
|
if (counter->per_pkg)
|
|
evsel__zero_per_pkg(counter);
|
|
|
|
ret = process_counter_maps(config, counter);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (config->aggr_mode != AGGR_GLOBAL)
|
|
return 0;
|
|
|
|
if (!counter->snapshot)
|
|
evsel__compute_deltas(counter, -1, -1, aggr);
|
|
perf_counts_values__scale(aggr, config->scale, &counter->counts->scaled);
|
|
|
|
for (i = 0; i < 3; i++)
|
|
update_stats(&ps->res_stats[i], count[i]);
|
|
|
|
if (verbose > 0) {
|
|
fprintf(config->output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
|
|
evsel__name(counter), count[0], count[1], count[2]);
|
|
}
|
|
|
|
/*
|
|
* Save the full runtime - to allow normalization during printout:
|
|
*/
|
|
perf_stat__update_shadow_stats(counter, *count, 0, &rt_stat);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__process_stat_event(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct perf_counts_values count;
|
|
struct perf_record_stat *st = &event->stat;
|
|
struct evsel *counter;
|
|
|
|
count.val = st->val;
|
|
count.ena = st->ena;
|
|
count.run = st->run;
|
|
|
|
counter = evlist__id2evsel(session->evlist, st->id);
|
|
if (!counter) {
|
|
pr_err("Failed to resolve counter for stat event.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
*perf_counts(counter->counts, st->cpu, st->thread) = count;
|
|
counter->supported = true;
|
|
return 0;
|
|
}
|
|
|
|
size_t perf_event__fprintf_stat(union perf_event *event, FILE *fp)
|
|
{
|
|
struct perf_record_stat *st = (struct perf_record_stat *)event;
|
|
size_t ret;
|
|
|
|
ret = fprintf(fp, "\n... id %" PRI_lu64 ", cpu %d, thread %d\n",
|
|
st->id, st->cpu, st->thread);
|
|
ret += fprintf(fp, "... value %" PRI_lu64 ", enabled %" PRI_lu64 ", running %" PRI_lu64 "\n",
|
|
st->val, st->ena, st->run);
|
|
|
|
return ret;
|
|
}
|
|
|
|
size_t perf_event__fprintf_stat_round(union perf_event *event, FILE *fp)
|
|
{
|
|
struct perf_record_stat_round *rd = (struct perf_record_stat_round *)event;
|
|
size_t ret;
|
|
|
|
ret = fprintf(fp, "\n... time %" PRI_lu64 ", type %s\n", rd->time,
|
|
rd->type == PERF_STAT_ROUND_TYPE__FINAL ? "FINAL" : "INTERVAL");
|
|
|
|
return ret;
|
|
}
|
|
|
|
size_t perf_event__fprintf_stat_config(union perf_event *event, FILE *fp)
|
|
{
|
|
struct perf_stat_config sc;
|
|
size_t ret;
|
|
|
|
perf_event__read_stat_config(&sc, &event->stat_config);
|
|
|
|
ret = fprintf(fp, "\n");
|
|
ret += fprintf(fp, "... aggr_mode %d\n", sc.aggr_mode);
|
|
ret += fprintf(fp, "... scale %d\n", sc.scale);
|
|
ret += fprintf(fp, "... interval %u\n", sc.interval);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int create_perf_stat_counter(struct evsel *evsel,
|
|
struct perf_stat_config *config,
|
|
struct target *target,
|
|
int cpu_map_idx)
|
|
{
|
|
struct perf_event_attr *attr = &evsel->core.attr;
|
|
struct evsel *leader = evsel__leader(evsel);
|
|
|
|
attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
|
|
PERF_FORMAT_TOTAL_TIME_RUNNING;
|
|
|
|
/*
|
|
* The event is part of non trivial group, let's enable
|
|
* the group read (for leader) and ID retrieval for all
|
|
* members.
|
|
*/
|
|
if (leader->core.nr_members > 1)
|
|
attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
|
|
|
|
attr->inherit = !config->no_inherit && list_empty(&evsel->bpf_counter_list);
|
|
|
|
/*
|
|
* Some events get initialized with sample_(period/type) set,
|
|
* like tracepoints. Clear it up for counting.
|
|
*/
|
|
attr->sample_period = 0;
|
|
|
|
if (config->identifier)
|
|
attr->sample_type = PERF_SAMPLE_IDENTIFIER;
|
|
|
|
if (config->all_user) {
|
|
attr->exclude_kernel = 1;
|
|
attr->exclude_user = 0;
|
|
}
|
|
|
|
if (config->all_kernel) {
|
|
attr->exclude_kernel = 0;
|
|
attr->exclude_user = 1;
|
|
}
|
|
|
|
/*
|
|
* Disabling all counters initially, they will be enabled
|
|
* either manually by us or by kernel via enable_on_exec
|
|
* set later.
|
|
*/
|
|
if (evsel__is_group_leader(evsel)) {
|
|
attr->disabled = 1;
|
|
|
|
/*
|
|
* In case of initial_delay we enable tracee
|
|
* events manually.
|
|
*/
|
|
if (target__none(target) && !config->initial_delay)
|
|
attr->enable_on_exec = 1;
|
|
}
|
|
|
|
if (target__has_cpu(target) && !target__has_per_thread(target))
|
|
return evsel__open_per_cpu(evsel, evsel__cpus(evsel), cpu_map_idx);
|
|
|
|
return evsel__open_per_thread(evsel, evsel->core.threads);
|
|
}
|