[PATCH v2 24/43] perf print-events: Print legacy cache events for each PMU

Ian Rogers
2023-04-28T07:43:25Z

Mirroring parse_events_add_cache, list the legacy name alongside its
alias with the PMU. Remove the now unnecessary hybrid logic.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/util/parse-events.c | 2 +-
tools/perf/util/parse-events.h | 1 +
tools/perf/util/print-events.c | 85 ++++++++++++++++------------------
3 files changed, 41 insertions(+), 47 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a07d4ecad13e..d95135115d7f 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -414,7 +414,7 @@ static int config_attr(struct perf_event_attr *attr,
* contain hyphens and the longest name
* should always be selected.
*/
-static int parse_events__decode_legacy_cache(const char *name, int pmu_type, __u64 *config)
+int parse_events__decode_legacy_cache(const char *name, int pmu_type, __u64 *config)
{
int len, cache_type = -1, cache_op = -1, cache_result = -1;
const char *name_end = &name[strlen(name) + 1];
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 0c26303f7f63..4e49be290209 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -173,6 +173,7 @@ int parse_events_add_tool(struct parse_events_state *parse_state,
int parse_events_add_cache(struct list_head *list, int *idx, const char *name,
struct parse_events_error *error,
struct list_head *head_config);
+int parse_events__decode_legacy_cache(const char *name, int pmu_type, __u64 *config);
int parse_events_add_breakpoint(struct list_head *list, int *idx,
u64 addr, char *type, u64 len);
int parse_events_add_pmu(struct parse_events_state *parse_state,
diff --git a/tools/perf/util/print-events.c b/tools/perf/util/print-events.c
index 93bbb868d400..d416c5484cd5 100644
--- a/tools/perf/util/print-events.c
+++ b/tools/perf/util/print-events.c
@@ -226,56 +226,49 @@ void print_sdt_events(const struct print_callbacks *print_cb, void *print_state)

int print_hwcache_events(const struct print_callbacks *print_cb, void *print_state)
{
+ struct perf_pmu *pmu = NULL;
const char *event_type_descriptor = event_type_descriptors[PERF_TYPE_HW_CACHE];

- for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
- for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
- /* skip invalid cache type */
- if (!evsel__is_cache_op_valid(type, op))
- continue;
+ while ((pmu = perf_pmu__scan(pmu)) != NULL) {
+ /*
+ * Skip uncore PMUs for performance. Software PMUs can open
+ * PERF_TYPE_HW_CACHE, so skip.
+ */
+ if (pmu->is_uncore || pmu->type == PERF_TYPE_SOFTWARE)
+ continue;

- for (int res = 0; res < PERF_COUNT_HW_CACHE_RESULT_MAX; res++) {
- struct perf_pmu *pmu = NULL;
- char name[64];
-
- __evsel__hw_cache_type_op_res_name(type, op, res,
- name, sizeof(name));
- if (!perf_pmu__has_hybrid()) {
- if (is_event_supported(PERF_TYPE_HW_CACHE,
- type | (op << 8) | (res << 16))) {
- print_cb->print_event(print_state,
- "cache",
- /*pmu_name=*/NULL,
- name,
- /*event_alias=*/NULL,
- /*scale_unit=*/NULL,
- /*deprecated=*/false,
- event_type_descriptor,
- /*desc=*/NULL,
- /*long_desc=*/NULL,
- /*encoding_desc=*/NULL);
- }
+ for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
+ for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
+ /* skip invalid cache type */
+ if (!evsel__is_cache_op_valid(type, op))
continue;
- }
- perf_pmu__for_each_hybrid_pmu(pmu) {
- if (is_event_supported(PERF_TYPE_HW_CACHE,
- type | (op << 8) | (res << 16) |
- ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT))) {
- char new_name[128];
- snprintf(new_name, sizeof(new_name),
- "%s/%s/", pmu->name, name);
- print_cb->print_event(print_state,
- "cache",
- pmu->name,
- name,
- new_name,
- /*scale_unit=*/NULL,
- /*deprecated=*/false,
- event_type_descriptor,
- /*desc=*/NULL,
- /*long_desc=*/NULL,
- /*encoding_desc=*/NULL);
- }
+
+ for (int res = 0; res < PERF_COUNT_HW_CACHE_RESULT_MAX; res++) {
+ char name[64];
+ char alias_name[128];
+ __u64 config;
+ int ret;
+
+ __evsel__hw_cache_type_op_res_name(type, op, res,
+ name, sizeof(name));
+
+ ret = parse_events__decode_legacy_cache(name, pmu->type,
+ &config);
+ if (ret || !is_event_supported(PERF_TYPE_HW_CACHE, config))
+ continue;
+ snprintf(alias_name, sizeof(alias_name), "%s/%s/",
+ pmu->name, name);
+ print_cb->print_event(print_state,
+ "cache",
+ pmu->name,
+ name,
+ alias_name,
+ /*scale_unit=*/NULL,
+ /*deprecated=*/false,
+ event_type_descriptor,
+ /*desc=*/NULL,
+ /*long_desc=*/NULL,
+ /*encoding_desc=*/NULL);
}
}
}
--
2.40.1.495.gc816e09b53d-goog