552 lines
12 KiB
C
552 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2017, Intel Corporation.
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*/
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/* Manage metrics and groups of metrics from JSON files */
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#include "metricgroup.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "strbuf.h"
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#include "pmu.h"
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#include "expr.h"
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#include "rblist.h"
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#include <string.h>
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#include <errno.h>
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#include "pmu-events/pmu-events.h"
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#include "strlist.h"
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#include <assert.h>
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#include <linux/ctype.h>
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#include <linux/zalloc.h>
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#include <subcmd/parse-options.h>
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struct metric_event *metricgroup__lookup(struct rblist *metric_events,
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struct evsel *evsel,
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bool create)
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{
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struct rb_node *nd;
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struct metric_event me = {
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.evsel = evsel
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};
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if (!metric_events)
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return NULL;
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nd = rblist__find(metric_events, &me);
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if (nd)
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return container_of(nd, struct metric_event, nd);
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if (create) {
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rblist__add_node(metric_events, &me);
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nd = rblist__find(metric_events, &me);
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if (nd)
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return container_of(nd, struct metric_event, nd);
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}
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return NULL;
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}
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static int metric_event_cmp(struct rb_node *rb_node, const void *entry)
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{
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struct metric_event *a = container_of(rb_node,
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struct metric_event,
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nd);
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const struct metric_event *b = entry;
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if (a->evsel == b->evsel)
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return 0;
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if ((char *)a->evsel < (char *)b->evsel)
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return -1;
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return +1;
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}
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static struct rb_node *metric_event_new(struct rblist *rblist __maybe_unused,
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const void *entry)
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{
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struct metric_event *me = malloc(sizeof(struct metric_event));
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if (!me)
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return NULL;
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memcpy(me, entry, sizeof(struct metric_event));
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me->evsel = ((struct metric_event *)entry)->evsel;
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INIT_LIST_HEAD(&me->head);
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return &me->nd;
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}
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static void metricgroup__rblist_init(struct rblist *metric_events)
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{
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rblist__init(metric_events);
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metric_events->node_cmp = metric_event_cmp;
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metric_events->node_new = metric_event_new;
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}
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struct egroup {
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struct list_head nd;
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int idnum;
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const char **ids;
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const char *metric_name;
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const char *metric_expr;
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};
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static bool record_evsel(int *ind, struct evsel **start,
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int idnum,
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struct evsel **metric_events,
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struct evsel *ev)
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{
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metric_events[*ind] = ev;
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if (*ind == 0)
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*start = ev;
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if (++*ind == idnum) {
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metric_events[*ind] = NULL;
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return true;
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}
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return false;
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}
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static struct evsel *find_evsel_group(struct evlist *perf_evlist,
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const char **ids,
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int idnum,
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struct evsel **metric_events)
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{
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struct evsel *ev, *start = NULL;
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int ind = 0;
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evlist__for_each_entry (perf_evlist, ev) {
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if (ev->collect_stat)
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continue;
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if (!strcmp(ev->name, ids[ind])) {
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if (record_evsel(&ind, &start, idnum,
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metric_events, ev))
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return start;
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} else {
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/*
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* We saw some other event that is not
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* in our list of events. Discard
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* the whole match and start again.
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*/
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ind = 0;
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start = NULL;
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if (!strcmp(ev->name, ids[ind])) {
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if (record_evsel(&ind, &start, idnum,
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metric_events, ev))
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return start;
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}
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}
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}
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/*
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* This can happen when an alias expands to multiple
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* events, like for uncore events.
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* We don't support this case for now.
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*/
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return NULL;
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}
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static int metricgroup__setup_events(struct list_head *groups,
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struct evlist *perf_evlist,
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struct rblist *metric_events_list)
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{
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struct metric_event *me;
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struct metric_expr *expr;
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int i = 0;
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int ret = 0;
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struct egroup *eg;
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struct evsel *evsel;
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list_for_each_entry (eg, groups, nd) {
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struct evsel **metric_events;
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metric_events = calloc(sizeof(void *), eg->idnum + 1);
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if (!metric_events) {
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ret = -ENOMEM;
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break;
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}
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evsel = find_evsel_group(perf_evlist, eg->ids, eg->idnum,
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metric_events);
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if (!evsel) {
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pr_debug("Cannot resolve %s: %s\n",
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eg->metric_name, eg->metric_expr);
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continue;
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}
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for (i = 0; i < eg->idnum; i++)
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metric_events[i]->collect_stat = true;
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me = metricgroup__lookup(metric_events_list, evsel, true);
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if (!me) {
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ret = -ENOMEM;
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break;
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}
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expr = malloc(sizeof(struct metric_expr));
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if (!expr) {
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ret = -ENOMEM;
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break;
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}
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expr->metric_expr = eg->metric_expr;
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expr->metric_name = eg->metric_name;
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expr->metric_events = metric_events;
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list_add(&expr->nd, &me->head);
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}
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return ret;
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}
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static bool match_metric(const char *n, const char *list)
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{
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int len;
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char *m;
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if (!list)
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return false;
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if (!strcmp(list, "all"))
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return true;
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if (!n)
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return !strcasecmp(list, "No_group");
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len = strlen(list);
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m = strcasestr(n, list);
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if (!m)
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return false;
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if ((m == n || m[-1] == ';' || m[-1] == ' ') &&
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(m[len] == 0 || m[len] == ';'))
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return true;
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return false;
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}
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struct mep {
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struct rb_node nd;
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const char *name;
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struct strlist *metrics;
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};
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static int mep_cmp(struct rb_node *rb_node, const void *entry)
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{
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struct mep *a = container_of(rb_node, struct mep, nd);
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struct mep *b = (struct mep *)entry;
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return strcmp(a->name, b->name);
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}
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static struct rb_node *mep_new(struct rblist *rl __maybe_unused,
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const void *entry)
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{
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struct mep *me = malloc(sizeof(struct mep));
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if (!me)
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return NULL;
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memcpy(me, entry, sizeof(struct mep));
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me->name = strdup(me->name);
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if (!me->name)
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goto out_me;
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me->metrics = strlist__new(NULL, NULL);
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if (!me->metrics)
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goto out_name;
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return &me->nd;
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out_name:
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zfree(&me->name);
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out_me:
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free(me);
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return NULL;
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}
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static struct mep *mep_lookup(struct rblist *groups, const char *name)
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{
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struct rb_node *nd;
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struct mep me = {
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.name = name
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};
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nd = rblist__find(groups, &me);
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if (nd)
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return container_of(nd, struct mep, nd);
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rblist__add_node(groups, &me);
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nd = rblist__find(groups, &me);
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if (nd)
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return container_of(nd, struct mep, nd);
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return NULL;
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}
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static void mep_delete(struct rblist *rl __maybe_unused,
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struct rb_node *nd)
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{
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struct mep *me = container_of(nd, struct mep, nd);
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strlist__delete(me->metrics);
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zfree(&me->name);
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free(me);
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}
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static void metricgroup__print_strlist(struct strlist *metrics, bool raw)
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{
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struct str_node *sn;
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int n = 0;
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strlist__for_each_entry (sn, metrics) {
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if (raw)
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printf("%s%s", n > 0 ? " " : "", sn->s);
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else
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printf(" %s\n", sn->s);
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n++;
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}
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if (raw)
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putchar('\n');
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}
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void metricgroup__print(bool metrics, bool metricgroups, char *filter,
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bool raw, bool details)
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{
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struct pmu_events_map *map = perf_pmu__find_map(NULL);
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struct pmu_event *pe;
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int i;
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struct rblist groups;
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struct rb_node *node, *next;
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struct strlist *metriclist = NULL;
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if (!map)
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return;
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if (!metricgroups) {
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metriclist = strlist__new(NULL, NULL);
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if (!metriclist)
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return;
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}
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rblist__init(&groups);
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groups.node_new = mep_new;
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groups.node_cmp = mep_cmp;
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groups.node_delete = mep_delete;
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for (i = 0; ; i++) {
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const char *g;
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pe = &map->table[i];
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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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g = pe->metric_group;
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if (!g && pe->metric_name) {
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if (pe->name)
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continue;
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g = "No_group";
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}
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if (g) {
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char *omg;
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char *mg = strdup(g);
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if (!mg)
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return;
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omg = mg;
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while ((g = strsep(&mg, ";")) != NULL) {
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struct mep *me;
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char *s;
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g = skip_spaces(g);
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if (*g == 0)
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g = "No_group";
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if (filter && !strstr(g, filter))
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continue;
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if (raw)
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s = (char *)pe->metric_name;
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else {
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if (asprintf(&s, "%s\n%*s%s]",
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pe->metric_name, 8, "[", pe->desc) < 0)
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return;
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if (details) {
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if (asprintf(&s, "%s\n%*s%s]",
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s, 8, "[", pe->metric_expr) < 0)
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return;
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}
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}
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if (!s)
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continue;
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if (!metricgroups) {
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strlist__add(metriclist, s);
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} else {
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me = mep_lookup(&groups, g);
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if (!me)
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continue;
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strlist__add(me->metrics, s);
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}
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}
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free(omg);
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}
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}
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if (metricgroups && !raw)
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printf("\nMetric Groups:\n\n");
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else if (metrics && !raw)
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printf("\nMetrics:\n\n");
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for (node = rb_first_cached(&groups.entries); node; node = next) {
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struct mep *me = container_of(node, struct mep, nd);
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if (metricgroups)
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printf("%s%s%s", me->name, metrics && !raw ? ":" : "", raw ? " " : "\n");
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if (metrics)
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metricgroup__print_strlist(me->metrics, raw);
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next = rb_next(node);
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rblist__remove_node(&groups, node);
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}
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if (!metricgroups)
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metricgroup__print_strlist(metriclist, raw);
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strlist__delete(metriclist);
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}
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static int metricgroup__add_metric(const char *metric, struct strbuf *events,
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struct list_head *group_list)
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{
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struct pmu_events_map *map = perf_pmu__find_map(NULL);
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struct pmu_event *pe;
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int ret = -EINVAL;
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int i, j;
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if (!map)
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return 0;
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for (i = 0; ; i++) {
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pe = &map->table[i];
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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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if (match_metric(pe->metric_group, metric) ||
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match_metric(pe->metric_name, metric)) {
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const char **ids;
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int idnum;
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struct egroup *eg;
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bool no_group = false;
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pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
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if (expr__find_other(pe->metric_expr,
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NULL, &ids, &idnum) < 0)
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continue;
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if (events->len > 0)
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strbuf_addf(events, ",");
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for (j = 0; j < idnum; j++) {
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pr_debug("found event %s\n", ids[j]);
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/*
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* Duration time maps to a software event and can make
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* groups not count. Always use it outside a
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* group.
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*/
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if (!strcmp(ids[j], "duration_time")) {
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if (j > 0)
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strbuf_addf(events, "}:W,");
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strbuf_addf(events, "duration_time");
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no_group = true;
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continue;
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}
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strbuf_addf(events, "%s%s",
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j == 0 || no_group ? "{" : ",",
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ids[j]);
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no_group = false;
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}
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if (!no_group)
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strbuf_addf(events, "}:W");
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eg = malloc(sizeof(struct egroup));
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if (!eg) {
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ret = -ENOMEM;
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break;
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}
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eg->ids = ids;
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eg->idnum = idnum;
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eg->metric_name = pe->metric_name;
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eg->metric_expr = pe->metric_expr;
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list_add_tail(&eg->nd, group_list);
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ret = 0;
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}
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}
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return ret;
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}
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static int metricgroup__add_metric_list(const char *list, struct strbuf *events,
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struct list_head *group_list)
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{
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char *llist, *nlist, *p;
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int ret = -EINVAL;
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nlist = strdup(list);
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if (!nlist)
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return -ENOMEM;
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llist = nlist;
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strbuf_init(events, 100);
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strbuf_addf(events, "%s", "");
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while ((p = strsep(&llist, ",")) != NULL) {
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ret = metricgroup__add_metric(p, events, group_list);
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if (ret == -EINVAL) {
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fprintf(stderr, "Cannot find metric or group `%s'\n",
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p);
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break;
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}
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}
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free(nlist);
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return ret;
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}
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static void metricgroup__free_egroups(struct list_head *group_list)
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{
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struct egroup *eg, *egtmp;
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int i;
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list_for_each_entry_safe (eg, egtmp, group_list, nd) {
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for (i = 0; i < eg->idnum; i++)
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zfree(&eg->ids[i]);
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zfree(&eg->ids);
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list_del_init(&eg->nd);
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free(eg);
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}
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}
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int metricgroup__parse_groups(const struct option *opt,
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const char *str,
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struct rblist *metric_events)
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{
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struct parse_events_error parse_error;
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struct evlist *perf_evlist = *(struct evlist **)opt->value;
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struct strbuf extra_events;
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LIST_HEAD(group_list);
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int ret;
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if (metric_events->nr_entries == 0)
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metricgroup__rblist_init(metric_events);
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ret = metricgroup__add_metric_list(str, &extra_events, &group_list);
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if (ret)
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return ret;
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pr_debug("adding %s\n", extra_events.buf);
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memset(&parse_error, 0, sizeof(struct parse_events_error));
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ret = parse_events(perf_evlist, extra_events.buf, &parse_error);
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if (ret) {
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parse_events_print_error(&parse_error, extra_events.buf);
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goto out;
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}
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strbuf_release(&extra_events);
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ret = metricgroup__setup_events(&group_list, perf_evlist,
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metric_events);
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out:
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metricgroup__free_egroups(&group_list);
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return ret;
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}
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bool metricgroup__has_metric(const char *metric)
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{
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struct pmu_events_map *map = perf_pmu__find_map(NULL);
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struct pmu_event *pe;
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int i;
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if (!map)
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return false;
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for (i = 0; ; i++) {
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pe = &map->table[i];
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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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if (match_metric(pe->metric_name, metric))
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return true;
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}
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return false;
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}
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