1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2017, Intel Corporation.
6 /* Manage metrics and groups of metrics from JSON files */
8 #include "metricgroup.h"
14 #include "pmu-hybrid.h"
21 #include <linux/ctype.h>
22 #include <linux/list_sort.h>
23 #include <linux/string.h>
24 #include <linux/zalloc.h>
25 #include <subcmd/parse-options.h>
26 #include <api/fs/fs.h>
31 struct metric_event *metricgroup__lookup(struct rblist *metric_events,
36 struct metric_event me = {
43 nd = rblist__find(metric_events, &me);
45 return container_of(nd, struct metric_event, nd);
47 rblist__add_node(metric_events, &me);
48 nd = rblist__find(metric_events, &me);
50 return container_of(nd, struct metric_event, nd);
55 static int metric_event_cmp(struct rb_node *rb_node, const void *entry)
57 struct metric_event *a = container_of(rb_node,
60 const struct metric_event *b = entry;
62 if (a->evsel == b->evsel)
64 if ((char *)a->evsel < (char *)b->evsel)
69 static struct rb_node *metric_event_new(struct rblist *rblist __maybe_unused,
72 struct metric_event *me = malloc(sizeof(struct metric_event));
76 memcpy(me, entry, sizeof(struct metric_event));
77 me->evsel = ((struct metric_event *)entry)->evsel;
78 INIT_LIST_HEAD(&me->head);
82 static void metric_event_delete(struct rblist *rblist __maybe_unused,
83 struct rb_node *rb_node)
85 struct metric_event *me = container_of(rb_node, struct metric_event, nd);
86 struct metric_expr *expr, *tmp;
88 list_for_each_entry_safe(expr, tmp, &me->head, nd) {
89 free((char *)expr->metric_name);
90 free(expr->metric_refs);
91 free(expr->metric_events);
98 static void metricgroup__rblist_init(struct rblist *metric_events)
100 rblist__init(metric_events);
101 metric_events->node_cmp = metric_event_cmp;
102 metric_events->node_new = metric_event_new;
103 metric_events->node_delete = metric_event_delete;
106 void metricgroup__rblist_exit(struct rblist *metric_events)
108 rblist__exit(metric_events);
112 * A node in the list of referenced metrics. metric_expr
113 * is held as a convenience to avoid a search through the
116 struct metric_ref_node {
117 const char *metric_name;
118 const char *metric_expr;
119 struct list_head list;
123 * The metric under construction. The data held here will be placed in a
129 * The expression parse context importantly holding the IDs contained
130 * within the expression.
132 struct expr_parse_ctx *pctx;
133 /** The name of the metric such as "IPC". */
134 const char *metric_name;
135 /** Modifier on the metric such as "u" or NULL for none. */
136 const char *modifier;
137 /** The expression to parse, for example, "instructions/cycles". */
138 const char *metric_expr;
140 * The "ScaleUnit" that scales and adds a unit to the metric during
143 const char *metric_unit;
144 /** Optional null terminated array of referenced metrics. */
145 struct metric_ref *metric_refs;
147 * Is there a constraint on the group of events? In which case the
148 * events won't be grouped.
152 * Parsed events for the metric. Optional as events may be taken from a
153 * different metric whose group contains all the IDs necessary for this
156 struct evlist *evlist;
159 static void metricgroup___watchdog_constraint_hint(const char *name, bool foot)
161 static bool violate_nmi_constraint;
164 pr_warning("Splitting metric group %s into standalone metrics.\n", name);
165 violate_nmi_constraint = true;
169 if (!violate_nmi_constraint)
172 pr_warning("Try disabling the NMI watchdog to comply NO_NMI_WATCHDOG metric constraint:\n"
173 " echo 0 > /proc/sys/kernel/nmi_watchdog\n"
175 " echo 1 > /proc/sys/kernel/nmi_watchdog\n");
178 static bool metricgroup__has_constraint(const struct pmu_event *pe)
180 if (!pe->metric_constraint)
183 if (!strcmp(pe->metric_constraint, "NO_NMI_WATCHDOG") &&
184 sysctl__nmi_watchdog_enabled()) {
185 metricgroup___watchdog_constraint_hint(pe->metric_name, false);
192 static struct metric *metric__new(const struct pmu_event *pe,
193 const char *modifier,
194 bool metric_no_group,
199 m = zalloc(sizeof(*m));
203 m->pctx = expr__ctx_new();
209 m->metric_name = pe->metric_name;
210 m->modifier = modifier ? strdup(modifier) : NULL;
211 if (modifier && !m->modifier) {
212 expr__ctx_free(m->pctx);
216 m->metric_expr = pe->metric_expr;
217 m->metric_unit = pe->unit;
218 m->pctx->runtime = runtime;
219 m->has_constraint = metric_no_group || metricgroup__has_constraint(pe);
220 m->metric_refs = NULL;
226 static void metric__free(struct metric *m)
228 free(m->metric_refs);
229 expr__ctx_free(m->pctx);
230 free((char *)m->modifier);
231 evlist__delete(m->evlist);
235 static bool contains_metric_id(struct evsel **metric_events, int num_events,
236 const char *metric_id)
240 for (i = 0; i < num_events; i++) {
241 if (!strcmp(evsel__metric_id(metric_events[i]), metric_id))
248 * setup_metric_events - Find a group of events in metric_evlist that correspond
249 * to the IDs from a parsed metric expression.
250 * @ids: the metric IDs to match.
251 * @metric_evlist: the list of perf events.
252 * @out_metric_events: holds the created metric events array.
254 static int setup_metric_events(struct hashmap *ids,
255 struct evlist *metric_evlist,
256 struct evsel ***out_metric_events)
258 struct evsel **metric_events;
259 const char *metric_id;
261 size_t ids_size, matched_events, i;
263 *out_metric_events = NULL;
264 ids_size = hashmap__size(ids);
266 metric_events = calloc(sizeof(void *), ids_size + 1);
271 evlist__for_each_entry(metric_evlist, ev) {
272 struct expr_id_data *val_ptr;
275 * Check for duplicate events with the same name. For
276 * example, uncore_imc/cas_count_read/ will turn into 6
277 * events per socket on skylakex. Only the first such
278 * event is placed in metric_events.
280 metric_id = evsel__metric_id(ev);
281 if (contains_metric_id(metric_events, matched_events, metric_id))
284 * Does this event belong to the parse context? For
285 * combined or shared groups, this metric may not care
288 if (hashmap__find(ids, metric_id, (void **)&val_ptr)) {
289 metric_events[matched_events++] = ev;
291 if (matched_events >= ids_size)
295 if (matched_events < ids_size) {
299 for (i = 0; i < ids_size; i++) {
300 ev = metric_events[i];
301 ev->collect_stat = true;
304 * The metric leader points to the identically named
305 * event in metric_events.
307 ev->metric_leader = ev;
309 * Mark two events with identical names in the same
310 * group (or globally) as being in use as uncore events
311 * may be duplicated for each pmu. Set the metric leader
312 * of such events to be the event that appears in
315 metric_id = evsel__metric_id(ev);
316 evlist__for_each_entry_continue(metric_evlist, ev) {
317 if (!strcmp(evsel__metric_id(ev), metric_id))
318 ev->metric_leader = metric_events[i];
321 *out_metric_events = metric_events;
325 static bool match_metric(const char *n, const char *list)
332 if (!strcmp(list, "all"))
335 return !strcasecmp(list, "No_group");
337 m = strcasestr(n, list);
340 if ((m == n || m[-1] == ';' || m[-1] == ' ') &&
341 (m[len] == 0 || m[len] == ';'))
346 static bool match_pe_metric(const struct pmu_event *pe, const char *metric)
348 return match_metric(pe->metric_group, metric) ||
349 match_metric(pe->metric_name, metric);
355 struct strlist *metrics;
358 static int mep_cmp(struct rb_node *rb_node, const void *entry)
360 struct mep *a = container_of(rb_node, struct mep, nd);
361 struct mep *b = (struct mep *)entry;
363 return strcmp(a->name, b->name);
366 static struct rb_node *mep_new(struct rblist *rl __maybe_unused,
369 struct mep *me = malloc(sizeof(struct mep));
373 memcpy(me, entry, sizeof(struct mep));
374 me->name = strdup(me->name);
377 me->metrics = strlist__new(NULL, NULL);
388 static struct mep *mep_lookup(struct rblist *groups, const char *name)
394 nd = rblist__find(groups, &me);
396 return container_of(nd, struct mep, nd);
397 rblist__add_node(groups, &me);
398 nd = rblist__find(groups, &me);
400 return container_of(nd, struct mep, nd);
404 static void mep_delete(struct rblist *rl __maybe_unused,
407 struct mep *me = container_of(nd, struct mep, nd);
409 strlist__delete(me->metrics);
414 static void metricgroup__print_strlist(struct strlist *metrics, bool raw)
419 strlist__for_each_entry (sn, metrics) {
421 printf("%s%s", n > 0 ? " " : "", sn->s);
423 printf(" %s\n", sn->s);
430 static int metricgroup__print_pmu_event(const struct pmu_event *pe,
431 bool metricgroups, char *filter,
432 bool raw, bool details,
433 struct rblist *groups,
434 struct strlist *metriclist)
439 g = pe->metric_group;
440 if (!g && pe->metric_name) {
454 while ((g = strsep(&mg, ";")) != NULL) {
461 if (filter && !strstr(g, filter))
464 s = (char *)pe->metric_name;
466 if (asprintf(&s, "%s\n%*s%s]",
467 pe->metric_name, 8, "[", pe->desc) < 0)
470 if (asprintf(&s, "%s\n%*s%s]",
471 s, 8, "[", pe->metric_expr) < 0)
480 strlist__add(metriclist, s);
482 me = mep_lookup(groups, g);
485 strlist__add(me->metrics, s);
496 struct metricgroup_print_sys_idata {
497 struct strlist *metriclist;
499 struct rblist *groups;
505 typedef int (*metricgroup_sys_event_iter_fn)(const struct pmu_event *pe, void *);
507 struct metricgroup_iter_data {
508 metricgroup_sys_event_iter_fn fn;
512 static int metricgroup__sys_event_iter(const struct pmu_event *pe, void *data)
514 struct metricgroup_iter_data *d = data;
515 struct perf_pmu *pmu = NULL;
517 if (!pe->metric_expr || !pe->compat)
520 while ((pmu = perf_pmu__scan(pmu))) {
522 if (!pmu->id || strcmp(pmu->id, pe->compat))
525 return d->fn(pe, d->data);
531 static int metricgroup__print_sys_event_iter(const struct pmu_event *pe, void *data)
533 struct metricgroup_print_sys_idata *d = data;
535 return metricgroup__print_pmu_event(pe, d->metricgroups, d->filter, d->raw,
536 d->details, d->groups, d->metriclist);
539 void metricgroup__print(bool metrics, bool metricgroups, char *filter,
540 bool raw, bool details, const char *pmu_name)
542 struct rblist groups;
543 struct rb_node *node, *next;
544 struct strlist *metriclist = NULL;
547 metriclist = strlist__new(NULL, NULL);
552 rblist__init(&groups);
553 groups.node_new = mep_new;
554 groups.node_cmp = mep_cmp;
555 groups.node_delete = mep_delete;
556 for (const struct pmu_event *pe = pmu_events_table__find(); pe; pe++) {
558 if (!pe->name && !pe->metric_group && !pe->metric_name)
560 if (!pe->metric_expr)
562 if (pmu_name && perf_pmu__is_hybrid(pe->pmu) &&
563 strcmp(pmu_name, pe->pmu)) {
566 if (metricgroup__print_pmu_event(pe, metricgroups, filter,
567 raw, details, &groups,
573 struct metricgroup_iter_data data = {
574 .fn = metricgroup__print_sys_event_iter,
575 .data = (void *) &(struct metricgroup_print_sys_idata){
576 .metriclist = metriclist,
577 .metricgroups = metricgroups,
585 pmu_for_each_sys_event(metricgroup__sys_event_iter, &data);
588 if (!filter || !rblist__empty(&groups)) {
589 if (metricgroups && !raw)
590 printf("\nMetric Groups:\n\n");
591 else if (metrics && !raw)
592 printf("\nMetrics:\n\n");
595 for (node = rb_first_cached(&groups.entries); node; node = next) {
596 struct mep *me = container_of(node, struct mep, nd);
599 printf("%s%s%s", me->name, metrics && !raw ? ":" : "", raw ? " " : "\n");
601 metricgroup__print_strlist(me->metrics, raw);
602 next = rb_next(node);
603 rblist__remove_node(&groups, node);
606 metricgroup__print_strlist(metriclist, raw);
607 strlist__delete(metriclist);
610 static const char *code_characters = ",-=@";
612 static int encode_metric_id(struct strbuf *sb, const char *x)
618 c = strchr(code_characters, *x);
620 ret = strbuf_addch(sb, '!');
624 ret = strbuf_addch(sb, '0' + (c - code_characters));
628 ret = strbuf_addch(sb, *x);
636 static int decode_metric_id(struct strbuf *sb, const char *x)
638 const char *orig = x;
648 if (i > strlen(code_characters)) {
649 pr_err("Bad metric-id encoding in: '%s'", orig);
652 c = code_characters[i];
654 ret = strbuf_addch(sb, c);
661 static int decode_all_metric_ids(struct evlist *perf_evlist, const char *modifier)
664 struct strbuf sb = STRBUF_INIT;
668 evlist__for_each_entry(perf_evlist, ev) {
672 ret = strbuf_setlen(&sb, 0);
676 ret = decode_metric_id(&sb, ev->metric_id);
680 free((char *)ev->metric_id);
681 ev->metric_id = strdup(sb.buf);
682 if (!ev->metric_id) {
687 * If the name is just the parsed event, use the metric-id to
688 * give a more friendly display version.
690 if (strstr(ev->name, "metric-id=")) {
691 bool has_slash = false;
694 for (cur = strchr(sb.buf, '@') ; cur; cur = strchr(++cur, '@')) {
700 if (!has_slash && !strchr(sb.buf, ':')) {
701 ret = strbuf_addch(&sb, ':');
705 ret = strbuf_addstr(&sb, modifier);
709 ev->name = strdup(sb.buf);
720 static int metricgroup__build_event_string(struct strbuf *events,
721 const struct expr_parse_ctx *ctx,
722 const char *modifier,
725 struct hashmap_entry *cur;
727 bool no_group = true, has_tool_events = false;
728 bool tool_events[PERF_TOOL_MAX] = {false};
731 #define RETURN_IF_NON_ZERO(x) do { if (x) return x; } while (0)
733 hashmap__for_each_entry(ctx->ids, cur, bkt) {
734 const char *sep, *rsep, *id = cur->key;
735 enum perf_tool_event ev;
737 pr_debug("found event %s\n", id);
739 /* Always move tool events outside of the group. */
740 ev = perf_tool_event__from_str(id);
741 if (ev != PERF_TOOL_NONE) {
742 has_tool_events = true;
743 tool_events[ev] = true;
746 /* Separate events with commas and open the group if necessary. */
748 if (!has_constraint) {
749 ret = strbuf_addch(events, '{');
750 RETURN_IF_NON_ZERO(ret);
755 ret = strbuf_addch(events, ',');
756 RETURN_IF_NON_ZERO(ret);
759 * Encode the ID as an event string. Add a qualifier for
760 * metric_id that is the original name except with characters
761 * that parse-events can't parse replaced. For example,
762 * 'msr@tsc@' gets added as msr/tsc,metric-id=msr!3tsc!3/
764 sep = strchr(id, '@');
766 ret = strbuf_add(events, id, sep - id);
767 RETURN_IF_NON_ZERO(ret);
768 ret = strbuf_addch(events, '/');
769 RETURN_IF_NON_ZERO(ret);
770 rsep = strrchr(sep, '@');
771 ret = strbuf_add(events, sep + 1, rsep - sep - 1);
772 RETURN_IF_NON_ZERO(ret);
773 ret = strbuf_addstr(events, ",metric-id=");
774 RETURN_IF_NON_ZERO(ret);
777 sep = strchr(id, ':');
779 ret = strbuf_add(events, id, sep - id);
780 RETURN_IF_NON_ZERO(ret);
782 ret = strbuf_addstr(events, id);
783 RETURN_IF_NON_ZERO(ret);
785 ret = strbuf_addstr(events, "/metric-id=");
786 RETURN_IF_NON_ZERO(ret);
788 ret = encode_metric_id(events, id);
789 RETURN_IF_NON_ZERO(ret);
790 ret = strbuf_addstr(events, "/");
791 RETURN_IF_NON_ZERO(ret);
794 ret = strbuf_addstr(events, sep + 1);
795 RETURN_IF_NON_ZERO(ret);
798 ret = strbuf_addstr(events, modifier);
799 RETURN_IF_NON_ZERO(ret);
802 if (!no_group && !has_constraint) {
803 ret = strbuf_addf(events, "}:W");
804 RETURN_IF_NON_ZERO(ret);
806 if (has_tool_events) {
809 perf_tool_event__for_each_event(i) {
810 if (tool_events[i]) {
812 ret = strbuf_addch(events, ',');
813 RETURN_IF_NON_ZERO(ret);
816 ret = strbuf_addstr(events, perf_tool_event__to_str(i));
817 RETURN_IF_NON_ZERO(ret);
823 #undef RETURN_IF_NON_ZERO
826 int __weak arch_get_runtimeparam(const struct pmu_event *pe __maybe_unused)
832 * A singly linked list on the stack of the names of metrics being
833 * processed. Used to identify recursion.
835 struct visited_metric {
837 const struct visited_metric *parent;
840 struct metricgroup_add_iter_data {
841 struct list_head *metric_list;
842 const char *metric_name;
843 const char *modifier;
846 bool metric_no_group;
847 struct metric *root_metric;
848 const struct visited_metric *visited;
849 const struct pmu_event *table;
852 static int add_metric(struct list_head *metric_list,
853 const struct pmu_event *pe,
854 const char *modifier,
855 bool metric_no_group,
856 struct metric *root_metric,
857 const struct visited_metric *visited,
858 const struct pmu_event *table);
861 * resolve_metric - Locate metrics within the root metric and recursively add
862 * references to them.
863 * @metric_list: The list the metric is added to.
864 * @modifier: if non-null event modifiers like "u".
865 * @metric_no_group: Should events written to events be grouped "{}" or
866 * global. Grouping is the default but due to multiplexing the
868 * @root_metric: Metrics may reference other metrics to form a tree. In this
869 * case the root_metric holds all the IDs and a list of referenced
870 * metrics. When adding a root this argument is NULL.
871 * @visited: A singly linked list of metric names being added that is used to
873 * @table: The table that is searched for metrics, most commonly the table for the
874 * architecture perf is running upon.
876 static int resolve_metric(struct list_head *metric_list,
877 const char *modifier,
878 bool metric_no_group,
879 struct metric *root_metric,
880 const struct visited_metric *visited,
881 const struct pmu_event *table)
883 struct hashmap_entry *cur;
886 /* The metric to resolve. */
887 const struct pmu_event *pe;
889 * The key in the IDs map, this may differ from in case,
890 * etc. from pe->metric_name.
894 int i, ret = 0, pending_cnt = 0;
897 * Iterate all the parsed IDs and if there's a matching metric and it to
900 hashmap__for_each_entry(root_metric->pctx->ids, cur, bkt) {
901 const struct pmu_event *pe;
903 pe = metricgroup__find_metric(cur->key, table);
905 pending = realloc(pending,
906 (pending_cnt + 1) * sizeof(struct to_resolve));
910 pending[pending_cnt].pe = pe;
911 pending[pending_cnt].key = cur->key;
916 /* Remove the metric IDs from the context. */
917 for (i = 0; i < pending_cnt; i++)
918 expr__del_id(root_metric->pctx, pending[i].key);
921 * Recursively add all the metrics, IDs are added to the root metric's
924 for (i = 0; i < pending_cnt; i++) {
925 ret = add_metric(metric_list, pending[i].pe, modifier, metric_no_group,
926 root_metric, visited, table);
936 * __add_metric - Add a metric to metric_list.
937 * @metric_list: The list the metric is added to.
938 * @pe: The pmu_event containing the metric to be added.
939 * @modifier: if non-null event modifiers like "u".
940 * @metric_no_group: Should events written to events be grouped "{}" or
941 * global. Grouping is the default but due to multiplexing the
943 * @runtime: A special argument for the parser only known at runtime.
944 * @root_metric: Metrics may reference other metrics to form a tree. In this
945 * case the root_metric holds all the IDs and a list of referenced
946 * metrics. When adding a root this argument is NULL.
947 * @visited: A singly linked list of metric names being added that is used to
949 * @table: The table that is searched for metrics, most commonly the table for the
950 * architecture perf is running upon.
952 static int __add_metric(struct list_head *metric_list,
953 const struct pmu_event *pe,
954 const char *modifier,
955 bool metric_no_group,
957 struct metric *root_metric,
958 const struct visited_metric *visited,
959 const struct pmu_event *table)
961 const struct visited_metric *vm;
963 bool is_root = !root_metric;
964 struct visited_metric visited_node = {
965 .name = pe->metric_name,
969 for (vm = visited; vm; vm = vm->parent) {
970 if (!strcmp(pe->metric_name, vm->name)) {
971 pr_err("failed: recursion detected for %s\n", pe->metric_name);
978 * This metric is the root of a tree and may reference other
979 * metrics that are added recursively.
981 root_metric = metric__new(pe, modifier, metric_no_group, runtime);
989 * This metric was referenced in a metric higher in the
990 * tree. Check if the same metric is already resolved in the
993 if (root_metric->metric_refs) {
994 for (; root_metric->metric_refs[cnt].metric_name; cnt++) {
995 if (!strcmp(pe->metric_name,
996 root_metric->metric_refs[cnt].metric_name))
1001 /* Create reference. Need space for the entry and the terminator. */
1002 root_metric->metric_refs = realloc(root_metric->metric_refs,
1003 (cnt + 2) * sizeof(struct metric_ref));
1004 if (!root_metric->metric_refs)
1008 * Intentionally passing just const char pointers,
1009 * from 'pe' object, so they never go away. We don't
1010 * need to change them, so there's no need to create
1013 root_metric->metric_refs[cnt].metric_name = pe->metric_name;
1014 root_metric->metric_refs[cnt].metric_expr = pe->metric_expr;
1016 /* Null terminate array. */
1017 root_metric->metric_refs[cnt+1].metric_name = NULL;
1018 root_metric->metric_refs[cnt+1].metric_expr = NULL;
1022 * For both the parent and referenced metrics, we parse
1023 * all the metric's IDs and add it to the root context.
1025 if (expr__find_ids(pe->metric_expr, NULL, root_metric->pctx) < 0) {
1026 /* Broken metric. */
1029 /* Resolve referenced metrics. */
1030 ret = resolve_metric(metric_list, modifier, metric_no_group, root_metric,
1031 &visited_node, table);
1036 metric__free(root_metric);
1039 list_add(&root_metric->nd, metric_list);
1044 #define table_for_each_event(__pe, __idx, __table) \
1046 for (__idx = 0, __pe = &__table[__idx]; \
1047 __pe->name || __pe->metric_group || __pe->metric_name; \
1048 __pe = &__table[++__idx])
1050 #define table_for_each_metric(__pe, __idx, __table, __metric) \
1051 table_for_each_event(__pe, __idx, __table) \
1052 if (__pe->metric_expr && \
1053 (match_metric(__pe->metric_group, __metric) || \
1054 match_metric(__pe->metric_name, __metric)))
1056 const struct pmu_event *metricgroup__find_metric(const char *metric,
1057 const struct pmu_event *table)
1059 const struct pmu_event *pe;
1062 table_for_each_event(pe, i, table) {
1063 if (match_metric(pe->metric_name, metric))
1070 static int add_metric(struct list_head *metric_list,
1071 const struct pmu_event *pe,
1072 const char *modifier,
1073 bool metric_no_group,
1074 struct metric *root_metric,
1075 const struct visited_metric *visited,
1076 const struct pmu_event *table)
1080 pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
1082 if (!strstr(pe->metric_expr, "?")) {
1083 ret = __add_metric(metric_list, pe, modifier, metric_no_group, 0,
1084 root_metric, visited, table);
1088 count = arch_get_runtimeparam(pe);
1090 /* This loop is added to create multiple
1091 * events depend on count value and add
1092 * those events to metric_list.
1095 for (j = 0; j < count && !ret; j++)
1096 ret = __add_metric(metric_list, pe, modifier, metric_no_group, j,
1097 root_metric, visited, table);
1103 static int metricgroup__add_metric_sys_event_iter(const struct pmu_event *pe,
1106 struct metricgroup_add_iter_data *d = data;
1109 if (!match_pe_metric(pe, d->metric_name))
1112 ret = add_metric(d->metric_list, pe, d->modifier, d->metric_no_group,
1113 d->root_metric, d->visited, d->table);
1117 *(d->has_match) = true;
1125 * metric_list_cmp - list_sort comparator that sorts metrics with more events to
1126 * the front. tool events are excluded from the count.
1128 static int metric_list_cmp(void *priv __maybe_unused, const struct list_head *l,
1129 const struct list_head *r)
1131 const struct metric *left = container_of(l, struct metric, nd);
1132 const struct metric *right = container_of(r, struct metric, nd);
1133 struct expr_id_data *data;
1134 int i, left_count, right_count;
1136 left_count = hashmap__size(left->pctx->ids);
1137 perf_tool_event__for_each_event(i) {
1138 if (!expr__get_id(left->pctx, perf_tool_event__to_str(i), &data))
1142 right_count = hashmap__size(right->pctx->ids);
1143 perf_tool_event__for_each_event(i) {
1144 if (!expr__get_id(right->pctx, perf_tool_event__to_str(i), &data))
1148 return right_count - left_count;
1152 * metricgroup__add_metric - Find and add a metric, or a metric group.
1153 * @metric_name: The name of the metric or metric group. For example, "IPC"
1154 * could be the name of a metric and "TopDownL1" the name of a
1156 * @modifier: if non-null event modifiers like "u".
1157 * @metric_no_group: Should events written to events be grouped "{}" or
1158 * global. Grouping is the default but due to multiplexing the
1159 * user may override.
1160 * @metric_list: The list that the metric or metric group are added to.
1161 * @table: The table that is searched for metrics, most commonly the table for the
1162 * architecture perf is running upon.
1164 static int metricgroup__add_metric(const char *metric_name, const char *modifier,
1165 bool metric_no_group,
1166 struct list_head *metric_list,
1167 const struct pmu_event *table)
1169 const struct pmu_event *pe;
1172 bool has_match = false;
1175 * Iterate over all metrics seeing if metric matches either the name or
1176 * group. When it does add the metric to the list.
1178 table_for_each_metric(pe, i, table, metric_name) {
1180 ret = add_metric(&list, pe, modifier, metric_no_group,
1181 /*root_metric=*/NULL,
1182 /*visited_metrics=*/NULL, table);
1188 struct metricgroup_iter_data data = {
1189 .fn = metricgroup__add_metric_sys_event_iter,
1190 .data = (void *) &(struct metricgroup_add_iter_data) {
1191 .metric_list = &list,
1192 .metric_name = metric_name,
1193 .modifier = modifier,
1194 .metric_no_group = metric_no_group,
1195 .has_match = &has_match,
1201 pmu_for_each_sys_event(metricgroup__sys_event_iter, &data);
1203 /* End of pmu events. */
1209 * add to metric_list so that they can be released
1210 * even if it's failed
1212 list_splice(&list, metric_list);
1217 * metricgroup__add_metric_list - Find and add metrics, or metric groups,
1218 * specified in a list.
1219 * @list: the list of metrics or metric groups. For example, "IPC,CPI,TopDownL1"
1220 * would match the IPC and CPI metrics, and TopDownL1 would match all
1221 * the metrics in the TopDownL1 group.
1222 * @metric_no_group: Should events written to events be grouped "{}" or
1223 * global. Grouping is the default but due to multiplexing the
1224 * user may override.
1225 * @metric_list: The list that metrics are added to.
1226 * @table: The table that is searched for metrics, most commonly the table for the
1227 * architecture perf is running upon.
1229 static int metricgroup__add_metric_list(const char *list, bool metric_no_group,
1230 struct list_head *metric_list,
1231 const struct pmu_event *table)
1233 char *list_itr, *list_copy, *metric_name, *modifier;
1236 list_copy = strdup(list);
1239 list_itr = list_copy;
1241 while ((metric_name = strsep(&list_itr, ",")) != NULL) {
1242 modifier = strchr(metric_name, ':');
1246 ret = metricgroup__add_metric(metric_name, modifier,
1247 metric_no_group, metric_list,
1250 pr_err("Cannot find metric or group `%s'\n", metric_name);
1261 * Warn about nmi_watchdog if any parsed metrics had the
1262 * NO_NMI_WATCHDOG constraint.
1264 metricgroup___watchdog_constraint_hint(NULL, true);
1272 static void metricgroup__free_metrics(struct list_head *metric_list)
1274 struct metric *m, *tmp;
1276 list_for_each_entry_safe (m, tmp, metric_list, nd) {
1277 list_del_init(&m->nd);
1283 * find_tool_events - Search for the pressence of tool events in metric_list.
1284 * @metric_list: List to take metrics from.
1285 * @tool_events: Array of false values, indices corresponding to tool events set
1286 * to true if tool event is found.
1288 static void find_tool_events(const struct list_head *metric_list,
1289 bool tool_events[PERF_TOOL_MAX])
1293 list_for_each_entry(m, metric_list, nd) {
1296 perf_tool_event__for_each_event(i) {
1297 struct expr_id_data *data;
1299 if (!tool_events[i] &&
1300 !expr__get_id(m->pctx, perf_tool_event__to_str(i), &data))
1301 tool_events[i] = true;
1307 * build_combined_expr_ctx - Make an expr_parse_ctx with all has_constraint
1308 * metric IDs, as the IDs are held in a set,
1309 * duplicates will be removed.
1310 * @metric_list: List to take metrics from.
1311 * @combined: Out argument for result.
1313 static int build_combined_expr_ctx(const struct list_head *metric_list,
1314 struct expr_parse_ctx **combined)
1316 struct hashmap_entry *cur;
1322 *combined = expr__ctx_new();
1326 list_for_each_entry(m, metric_list, nd) {
1327 if (m->has_constraint && !m->modifier) {
1328 hashmap__for_each_entry(m->pctx->ids, cur, bkt) {
1329 dup = strdup(cur->key);
1334 ret = expr__add_id(*combined, dup);
1342 expr__ctx_free(*combined);
1348 * parse_ids - Build the event string for the ids and parse them creating an
1349 * evlist. The encoded metric_ids are decoded.
1350 * @metric_no_merge: is metric sharing explicitly disabled.
1351 * @fake_pmu: used when testing metrics not supported by the current CPU.
1352 * @ids: the event identifiers parsed from a metric.
1353 * @modifier: any modifiers added to the events.
1354 * @has_constraint: false if events should be placed in a weak group.
1355 * @tool_events: entries set true if the tool event of index could be present in
1356 * the overall list of metrics.
1357 * @out_evlist: the created list of events.
1359 static int parse_ids(bool metric_no_merge, struct perf_pmu *fake_pmu,
1360 struct expr_parse_ctx *ids, const char *modifier,
1361 bool has_constraint, const bool tool_events[PERF_TOOL_MAX],
1362 struct evlist **out_evlist)
1364 struct parse_events_error parse_error;
1365 struct evlist *parsed_evlist;
1366 struct strbuf events = STRBUF_INIT;
1370 if (!metric_no_merge || hashmap__size(ids->ids) == 0) {
1371 bool added_event = false;
1374 * We may fail to share events between metrics because a tool
1375 * event isn't present in one metric. For example, a ratio of
1376 * cache misses doesn't need duration_time but the same events
1377 * may be used for a misses per second. Events without sharing
1378 * implies multiplexing, that is best avoided, so place
1379 * all tool events in every group.
1381 * Also, there may be no ids/events in the expression parsing
1382 * context because of constant evaluation, e.g.:
1383 * event1 if #smt_on else 0
1384 * Add a tool event to avoid a parse error on an empty string.
1386 perf_tool_event__for_each_event(i) {
1387 if (tool_events[i]) {
1388 char *tmp = strdup(perf_tool_event__to_str(i));
1392 ids__insert(ids->ids, tmp);
1396 if (!added_event && hashmap__size(ids->ids) == 0) {
1397 char *tmp = strdup("duration_time");
1401 ids__insert(ids->ids, tmp);
1404 ret = metricgroup__build_event_string(&events, ids, modifier,
1409 parsed_evlist = evlist__new();
1410 if (!parsed_evlist) {
1414 pr_debug("Parsing metric events '%s'\n", events.buf);
1415 parse_events_error__init(&parse_error);
1416 ret = __parse_events(parsed_evlist, events.buf, &parse_error, fake_pmu);
1418 parse_events_error__print(&parse_error, events.buf);
1421 ret = decode_all_metric_ids(parsed_evlist, modifier);
1425 *out_evlist = parsed_evlist;
1426 parsed_evlist = NULL;
1428 parse_events_error__exit(&parse_error);
1429 evlist__delete(parsed_evlist);
1430 strbuf_release(&events);
1434 static int parse_groups(struct evlist *perf_evlist, const char *str,
1435 bool metric_no_group,
1436 bool metric_no_merge,
1437 struct perf_pmu *fake_pmu,
1438 struct rblist *metric_events_list,
1439 const struct pmu_event *table)
1441 struct evlist *combined_evlist = NULL;
1442 LIST_HEAD(metric_list);
1444 bool tool_events[PERF_TOOL_MAX] = {false};
1447 if (metric_events_list->nr_entries == 0)
1448 metricgroup__rblist_init(metric_events_list);
1449 ret = metricgroup__add_metric_list(str, metric_no_group,
1450 &metric_list, table);
1454 /* Sort metrics from largest to smallest. */
1455 list_sort(NULL, &metric_list, metric_list_cmp);
1457 if (!metric_no_merge) {
1458 struct expr_parse_ctx *combined = NULL;
1460 find_tool_events(&metric_list, tool_events);
1462 ret = build_combined_expr_ctx(&metric_list, &combined);
1464 if (!ret && combined && hashmap__size(combined->ids)) {
1465 ret = parse_ids(metric_no_merge, fake_pmu, combined,
1467 /*has_constraint=*/true,
1472 expr__ctx_free(combined);
1478 list_for_each_entry(m, &metric_list, nd) {
1479 struct metric_event *me;
1480 struct evsel **metric_events;
1481 struct evlist *metric_evlist = NULL;
1483 struct metric_expr *expr;
1485 if (combined_evlist && m->has_constraint) {
1486 metric_evlist = combined_evlist;
1487 } else if (!metric_no_merge) {
1489 * See if the IDs for this metric are a subset of an
1492 list_for_each_entry(n, &metric_list, nd) {
1496 if (n->evlist == NULL)
1499 if ((!m->modifier && n->modifier) ||
1500 (m->modifier && !n->modifier) ||
1501 (m->modifier && n->modifier &&
1502 strcmp(m->modifier, n->modifier)))
1505 if (expr__subset_of_ids(n->pctx, m->pctx)) {
1506 pr_debug("Events in '%s' fully contained within '%s'\n",
1507 m->metric_name, n->metric_name);
1508 metric_evlist = n->evlist;
1514 if (!metric_evlist) {
1515 ret = parse_ids(metric_no_merge, fake_pmu, m->pctx, m->modifier,
1516 m->has_constraint, tool_events, &m->evlist);
1520 metric_evlist = m->evlist;
1522 ret = setup_metric_events(m->pctx->ids, metric_evlist, &metric_events);
1524 pr_debug("Cannot resolve IDs for %s: %s\n",
1525 m->metric_name, m->metric_expr);
1529 me = metricgroup__lookup(metric_events_list, metric_events[0], true);
1531 expr = malloc(sizeof(struct metric_expr));
1534 free(metric_events);
1538 expr->metric_refs = m->metric_refs;
1539 m->metric_refs = NULL;
1540 expr->metric_expr = m->metric_expr;
1544 if (asprintf(&tmp, "%s:%s", m->metric_name, m->modifier) < 0)
1545 expr->metric_name = NULL;
1547 expr->metric_name = tmp;
1549 expr->metric_name = strdup(m->metric_name);
1551 if (!expr->metric_name) {
1553 free(metric_events);
1556 expr->metric_unit = m->metric_unit;
1557 expr->metric_events = metric_events;
1558 expr->runtime = m->pctx->runtime;
1559 list_add(&expr->nd, &me->head);
1563 if (combined_evlist) {
1564 evlist__splice_list_tail(perf_evlist, &combined_evlist->core.entries);
1565 evlist__delete(combined_evlist);
1568 list_for_each_entry(m, &metric_list, nd) {
1570 evlist__splice_list_tail(perf_evlist, &m->evlist->core.entries);
1574 metricgroup__free_metrics(&metric_list);
1578 int metricgroup__parse_groups(const struct option *opt,
1580 bool metric_no_group,
1581 bool metric_no_merge,
1582 struct rblist *metric_events)
1584 struct evlist *perf_evlist = *(struct evlist **)opt->value;
1585 const struct pmu_event *table = pmu_events_table__find();
1587 return parse_groups(perf_evlist, str, metric_no_group,
1588 metric_no_merge, NULL, metric_events, table);
1591 int metricgroup__parse_groups_test(struct evlist *evlist,
1592 const struct pmu_event *table,
1594 bool metric_no_group,
1595 bool metric_no_merge,
1596 struct rblist *metric_events)
1598 return parse_groups(evlist, str, metric_no_group,
1599 metric_no_merge, &perf_pmu__fake, metric_events, table);
1602 bool metricgroup__has_metric(const char *metric)
1604 const struct pmu_event *table = pmu_events_table__find();
1605 const struct pmu_event *pe;
1611 for (i = 0; ; i++) {
1614 if (!pe->name && !pe->metric_group && !pe->metric_name)
1616 if (!pe->metric_expr)
1618 if (match_metric(pe->metric_name, metric))
1624 int metricgroup__copy_metric_events(struct evlist *evlist, struct cgroup *cgrp,
1625 struct rblist *new_metric_events,
1626 struct rblist *old_metric_events)
1630 for (i = 0; i < rblist__nr_entries(old_metric_events); i++) {
1632 struct metric_event *old_me, *new_me;
1633 struct metric_expr *old_expr, *new_expr;
1634 struct evsel *evsel;
1638 nd = rblist__entry(old_metric_events, i);
1639 old_me = container_of(nd, struct metric_event, nd);
1641 evsel = evlist__find_evsel(evlist, old_me->evsel->core.idx);
1644 new_me = metricgroup__lookup(new_metric_events, evsel, true);
1648 pr_debug("copying metric event for cgroup '%s': %s (idx=%d)\n",
1649 cgrp ? cgrp->name : "root", evsel->name, evsel->core.idx);
1651 list_for_each_entry(old_expr, &old_me->head, nd) {
1652 new_expr = malloc(sizeof(*new_expr));
1656 new_expr->metric_expr = old_expr->metric_expr;
1657 new_expr->metric_name = strdup(old_expr->metric_name);
1658 if (!new_expr->metric_name)
1661 new_expr->metric_unit = old_expr->metric_unit;
1662 new_expr->runtime = old_expr->runtime;
1664 if (old_expr->metric_refs) {
1665 /* calculate number of metric_events */
1666 for (nr = 0; old_expr->metric_refs[nr].metric_name; nr++)
1668 alloc_size = sizeof(*new_expr->metric_refs);
1669 new_expr->metric_refs = calloc(nr + 1, alloc_size);
1670 if (!new_expr->metric_refs) {
1675 memcpy(new_expr->metric_refs, old_expr->metric_refs,
1678 new_expr->metric_refs = NULL;
1681 /* calculate number of metric_events */
1682 for (nr = 0; old_expr->metric_events[nr]; nr++)
1684 alloc_size = sizeof(*new_expr->metric_events);
1685 new_expr->metric_events = calloc(nr + 1, alloc_size);
1686 if (!new_expr->metric_events) {
1687 free(new_expr->metric_refs);
1692 /* copy evsel in the same position */
1693 for (idx = 0; idx < nr; idx++) {
1694 evsel = old_expr->metric_events[idx];
1695 evsel = evlist__find_evsel(evlist, evsel->core.idx);
1696 if (evsel == NULL) {
1697 free(new_expr->metric_events);
1698 free(new_expr->metric_refs);
1702 new_expr->metric_events[idx] = evsel;
1705 list_add(&new_expr->nd, &new_me->head);