[PATCH v2 02/16] perf parse-events: Directly pass PMU to parse_events_add_pmu

Ian Rogers
2024-04-16T06:16:06Z

Avoid passing the name of a PMU then finding it again, just directly
pass the PMU. parse_events_multi_pmu_add_or_add_pmu is the only
version that needs to find a PMU, so move the find there. Remove the
error message as parse_events_multi_pmu_add_or_add_pmu will given an
error at the end when a name isn't either a PMU name or event
name. Without the error message being created the location in the
input parameter (loc) can be removed.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/util/parse-events.c | 46 +++++++++++++---------------------
1 file changed, 17 insertions(+), 29 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a6f71165ee1a..2d5a275dd257 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1386,32 +1386,18 @@ static bool config_term_percore(struct list_head *config_terms)
}

static int parse_events_add_pmu(struct parse_events_state *parse_state,
- struct list_head *list, const char *name,
- const struct parse_events_terms *const_parsed_terms,
- bool auto_merge_stats, void *loc_)
+ struct list_head *list, struct perf_pmu *pmu,
+ const struct parse_events_terms *const_parsed_terms,
+ bool auto_merge_stats)
{
struct perf_event_attr attr;
struct perf_pmu_info info;
- struct perf_pmu *pmu;
struct evsel *evsel;
struct parse_events_error *err = parse_state->error;
- YYLTYPE *loc = loc_;
LIST_HEAD(config_terms);
struct parse_events_terms parsed_terms;
bool alias_rewrote_terms = false;

- pmu = parse_state->fake_pmu ?: perf_pmus__find(name);
-
- if (!pmu) {
- char *err_str;
-
- if (asprintf(&err_str,
- "Cannot find PMU `%s'. Missing kernel support?",
- name) >= 0)
- parse_events_error__handle(err, loc->first_column, err_str, NULL);
- return -EINVAL;
- }
-
parse_events_terms__init(&parsed_terms);
if (const_parsed_terms) {
int ret = parse_events_terms__copy(const_parsed_terms, &parsed_terms);
@@ -1425,9 +1411,9 @@ static int parse_events_add_pmu(struct parse_events_state *parse_state,

strbuf_init(&sb, /*hint=*/ 0);
if (pmu->selectable && list_empty(&parsed_terms.terms)) {
- strbuf_addf(&sb, "%s//", name);
+ strbuf_addf(&sb, "%s//", pmu->name);
} else {
- strbuf_addf(&sb, "%s/", name);
+ strbuf_addf(&sb, "%s/", pmu->name);
parse_events_terms__to_strbuf(&parsed_terms, &sb);
strbuf_addch(&sb, '/');
}
@@ -1469,7 +1455,7 @@ static int parse_events_add_pmu(struct parse_events_state *parse_state,

strbuf_init(&sb, /*hint=*/ 0);
parse_events_terms__to_strbuf(&parsed_terms, &sb);
- fprintf(stderr, "..after resolving event: %s/%s/\n", name, sb.buf);
+ fprintf(stderr, "..after resolving event: %s/%s/\n", pmu->name, sb.buf);
strbuf_release(&sb);
}

@@ -1583,8 +1569,8 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
continue;

auto_merge_stats = perf_pmu__auto_merge_stats(pmu);
- if (!parse_events_add_pmu(parse_state, list, pmu->name,
- &parsed_terms, auto_merge_stats, loc)) {
+ if (!parse_events_add_pmu(parse_state, list, pmu,
+ &parsed_terms, auto_merge_stats)) {
struct strbuf sb;

strbuf_init(&sb, /*hint=*/ 0);
@@ -1596,8 +1582,8 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
}

if (parse_state->fake_pmu) {
- if (!parse_events_add_pmu(parse_state, list, event_name, &parsed_terms,
- /*auto_merge_stats=*/true, loc)) {
+ if (!parse_events_add_pmu(parse_state, list, parse_state->fake_pmu, &parsed_terms,
+ /*auto_merge_stats=*/true)) {
struct strbuf sb;

strbuf_init(&sb, /*hint=*/ 0);
@@ -1626,7 +1612,7 @@ int parse_events_multi_pmu_add_or_add_pmu(struct parse_events_state *parse_state
{
char *pattern = NULL;
YYLTYPE *loc = loc_;
- struct perf_pmu *pmu = NULL;
+ struct perf_pmu *pmu;
int ok = 0;
char *help;

@@ -1637,10 +1623,12 @@ int parse_events_multi_pmu_add_or_add_pmu(struct parse_events_state *parse_state
INIT_LIST_HEAD(*listp);

/* Attempt to add to list assuming event_or_pmu is a PMU name. */
- if (!parse_events_add_pmu(parse_state, *listp, event_or_pmu, const_parsed_terms,
- /*auto_merge_stats=*/false, loc))
+ pmu = parse_state->fake_pmu ?: perf_pmus__find(event_or_pmu);
+ if (pmu && !parse_events_add_pmu(parse_state, *listp, pmu, const_parsed_terms,
+ /*auto_merge_stats=*/false))
return 0;

+ pmu = NULL;
/* Failed to add, try wildcard expansion of event_or_pmu as a PMU name. */
if (asprintf(&pattern, "%s*", event_or_pmu) < 0) {
zfree(listp);
@@ -1660,9 +1648,9 @@ int parse_events_multi_pmu_add_or_add_pmu(struct parse_events_state *parse_state
!perf_pmu__match(pattern, pmu->alias_name, event_or_pmu)) {
bool auto_merge_stats = perf_pmu__auto_merge_stats(pmu);

- if (!parse_events_add_pmu(parse_state, *listp, pmu->name,
+ if (!parse_events_add_pmu(parse_state, *listp, pmu,
const_parsed_terms,
- auto_merge_stats, loc)) {
+ auto_merge_stats)) {
ok++;
parse_state->wild_card_pmus = true;
}