perf jevents: Support for has_event function

Support for the new has_event function in metrics.

Signed-off-by: Ian Rogers <[email protected]>
Tested-by: Namhyung Kim <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Eduard Zingerman <[email protected]>
Cc: Sohom Datta <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Caleb Biggers <[email protected]>
Cc: Edward Baker <[email protected]>
Cc: Perry Taylor <[email protected]>
Cc: Samantha Alt <[email protected]>
Cc: Weilin Wang <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Andrii Nakryiko <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Jing Zhang <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Zhengjun Xing <[email protected]>
Cc: John Garry <[email protected]>
Cc: Ingo Molnar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

Author: captain5050

tools/perf/pmu-events/metric.py

@@ -408,6 +408,12 @@ def source_count(event: Event) -> Function:
   return Function('source_count', event)
 
 
+def has_event(event: Event) -> Function:
+  # pylint: disable=redefined-builtin
+  # pylint: disable=invalid-name
+  return Function('has_event', event)
+
+
 class Metric:
   """An individual metric that will specifiable on the perf command line."""
   groups: Set[str]
@@ -539,7 +545,7 @@ def ParsePerfJson(orig: str) -> Expression:
               r'Event(r"\1")', py)
   py = re.sub(r'#Event\(r"([^"]*)"\)', r'Literal("#\1")', py)
   py = re.sub(r'([0-9]+)Event\(r"(e[0-9]+)"\)', r'\1\2', py)
-  keywords = ['if', 'else', 'min', 'max', 'd_ratio', 'source_count']
+  keywords = ['if', 'else', 'min', 'max', 'd_ratio', 'source_count', 'has_event']
   for kw in keywords:
     py = re.sub(rf'Event\(r"{kw}"\)', kw, py)