[PATCH v2 05/20] perf jevents: Add CheckPmu to see if a PMU is in loaded json events

From: Ian Rogers
Date: Fri Mar 01 2024 - 13:57:39 EST


CheckPmu can be used to determine if hybrid events are present,
allowing for hybrid conditional metrics/events/pmus to be premised on
the json files rather than hard coded tables.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/pmu-events/metric.py | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py
index 7d445e47ae09..0b84506cf2f7 100644
--- a/tools/perf/pmu-events/metric.py
+++ b/tools/perf/pmu-events/metric.py
@@ -8,10 +8,12 @@ import re
from enum import Enum
from typing import Dict, List, Optional, Set, Tuple, Union

+all_pmus = set()
all_events = set()

def LoadEvents(directory: str) -> None:
"""Populate a global set of all known events for the purpose of validating Event names"""
+ global all_pmus
global all_events
all_events = {
"context\-switches",
@@ -24,12 +26,17 @@ def LoadEvents(directory: str) -> None:
filename = os.fsdecode(file)
if filename.endswith(".json"):
for x in json.load(open(f"{directory}/{filename}")):
+ if "Unit" in x:
+ all_pmus.add(x["Unit"])
if "EventName" in x:
all_events.add(x["EventName"])
elif "ArchStdEvent" in x:
all_events.add(x["ArchStdEvent"])


+def CheckPmu(name: str) -> bool:
+ return name in all_pmus
+
def CheckEvent(name: str) -> bool:
"""Check the event name exists in the set of all loaded events"""
global all_events
--
2.44.0.278.ge034bb2e1d-goog