[PATCH v3 11/11] perf jevents: Add model list option

From: Ian Rogers
Date: Tue Jan 24 2023 - 01:35:44 EST


This allows the set of generated jevents events and metrics be limited
to a subset of the model names. Appropriate if trying to minimize the
binary size where only a set of models are possible. On ARM64 the
--model selects the implementor rather than model.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/pmu-events/Build | 3 ++-
tools/perf/pmu-events/jevents.py | 7 +++++++
2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/Build b/tools/perf/pmu-events/Build
index 15b9e8fdbffa..a14de24ecb69 100644
--- a/tools/perf/pmu-events/Build
+++ b/tools/perf/pmu-events/Build
@@ -10,6 +10,7 @@ JEVENTS_PY = pmu-events/jevents.py
ifeq ($(JEVENTS_ARCH),)
JEVENTS_ARCH=$(SRCARCH)
endif
+JEVENTS_MODEL ?= all

#
# Locate/process JSON files in pmu-events/arch/
@@ -23,5 +24,5 @@ $(OUTPUT)pmu-events/pmu-events.c: pmu-events/empty-pmu-events.c
else
$(OUTPUT)pmu-events/pmu-events.c: $(JSON) $(JSON_TEST) $(JEVENTS_PY) pmu-events/metric.py
$(call rule_mkdir)
- $(Q)$(call echo-cmd,gen)$(PYTHON) $(JEVENTS_PY) $(JEVENTS_ARCH) pmu-events/arch $@
+ $(Q)$(call echo-cmd,gen)$(PYTHON) $(JEVENTS_PY) $(JEVENTS_ARCH) $(JEVENTS_MODEL) pmu-events/arch $@
endif
diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 627ee817f57f..764720858950 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -888,12 +888,19 @@ def main() -> None:
action: Callable[[Sequence[str], os.DirEntry], None]) -> None:
"""Replicate the directory/file walking behavior of C's file tree walk."""
for item in os.scandir(path):
+ if (len(parents) == 0 and item.is_dir() and _args.model != 'all' and
+ 'test' not in item.name and item.name not in _args.model.split(',')):
+ continue
action(parents, item)
if item.is_dir():
ftw(item.path, parents + [item.name], action)

ap = argparse.ArgumentParser()
ap.add_argument('arch', help='Architecture name like x86')
+ ap.add_argument('model', help='''Select a model such as skylake to
+reduce the code size. Normally set to "all". For architectures like
+ARM64 with an implementor/model, this selects the implementor.''',
+ default='all')
ap.add_argument(
'starting_dir',
type=dir_path,
--
2.39.0.246.g2a6d74b583-goog