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Message-Id: <20240904044351.712080-1-irogers@google.com>
Date: Tue, 3 Sep 2024 21:43:51 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org
Subject: [PATCH v1] perf jevents: Add cpuid to model lookup command
When restricting jevents generated json lookup code with JEVENTS_MODEL
a list of models must be provided. Some builds don't know model names
but know cpuids. Add a command that can convert a cpuid to a model
using mapfile.csv files. This can be used with JEVENTS_MODEL like:
```
$ make JEVENTS_MODEL=`./pmu-events/models.py x86 'GenuineIntel-6-8D-1,AuthenticAMD-26-1' pmu-events/arch/`
```
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/pmu-events/models.py | 73 +++++++++++++++++++++++++++++++++
1 file changed, 73 insertions(+)
create mode 100755 tools/perf/pmu-events/models.py
diff --git a/tools/perf/pmu-events/models.py b/tools/perf/pmu-events/models.py
new file mode 100755
index 000000000000..8f727d29c952
--- /dev/null
+++ b/tools/perf/pmu-events/models.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+"""List model names from mapfile.csv files."""
+import argparse
+import csv
+import os
+import re
+from typing import List
+
+def main() -> None:
+ def dir_path(path: str) -> str:
+ """Validate path is a directory for argparse."""
+ if os.path.isdir(path):
+ return path
+ raise argparse.ArgumentTypeError(f'\'{path}\' is not a valid directory')
+
+ def find_archs(start_dir: str, arch: str) -> List[str]:
+ archs = []
+ for item in os.scandir(start_dir):
+ if not item.is_dir():
+ continue
+ if arch in (item.name, 'all'):
+ archs.append(item.name)
+
+ if len(archs) < 1:
+ raise IOError(f'Missing architecture directory \'{arch}\'')
+
+ return archs
+
+ def find_mapfiles(start_dir: str, archs: List[str]) -> List[str]:
+ result = []
+ for arch in archs:
+ for item in os.scandir(f'{start_dir}/{arch}'):
+ if item.is_dir():
+ continue
+ if item.name == 'mapfile.csv':
+ result.append(f'{start_dir}/{arch}/mapfile.csv')
+ return result
+
+ def find_cpuids(mapfiles: List[str], cpuids: str) -> List[str]:
+ result = []
+ for mapfile in mapfiles:
+ with open(mapfile, encoding='utf-8') as csvfile:
+ first = False
+ table = csv.reader(csvfile)
+ for row in table:
+ if not first or len(row) == 0 or row[0].startswith('#'):
+ first = True
+ continue
+ # Python regular expressions don't handle xdigit.
+ regex = row[0].replace('[[:xdigit:]]', '[0-9a-fA-F]')
+ for cpuid in cpuids.split(','):
+ if re.match(regex, cpuid):
+ result.append(row[2])
+ return result
+
+ ap = argparse.ArgumentParser()
+ ap.add_argument('arch', help='Architecture name like x86')
+ ap.add_argument('cpuid', default='all', help='List of cpuids to convert to model names')
+ ap.add_argument(
+ 'starting_dir',
+ type=dir_path,
+ help='Root of tree containing architecture directories containing json files'
+ )
+ args = ap.parse_args()
+
+ archs = find_archs(args.starting_dir, args.arch)
+ mapfiles = find_mapfiles(args.starting_dir, archs)
+ models = find_cpuids(mapfiles, args.cpuid)
+ print(','.join(models))
+
+if __name__ == '__main__':
+ main()
--
2.46.0.469.g59c65b2a67-goog
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