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3df360cb03
We want to reduce the total number of build units in the system to get on our way to a single binary. It will help to have some numbers so lets add a job to gitlab to track our progress. Cc: Pierrick Bouvier <pierrick.bouvier@linaro.org> Cc: Philippe Mathieu-Daudé <philmd@linaro.org> Cc: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20250304222439.2035603-19-alex.bennee@linaro.org>
66 lines
1.7 KiB
Python
Executable file
66 lines
1.7 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# check-units.py: check the number of compilation units and identify
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# those that are rebuilt multiple times
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#
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# Copyright (C) 2025 Linaro Ltd.
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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from os import access, R_OK, path
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from sys import argv, exit
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import json
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from collections import Counter
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def extract_build_units(cc_path):
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"""
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Extract the build units and their counds from compile_commands.json file.
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Returns:
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Hash table of ["unit"] = count
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"""
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j = json.load(open(cc_path, 'r'))
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files = [f['file'] for f in j]
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build_units = Counter(files)
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return build_units
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def analyse_units(build_units):
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"""
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Analyse the build units and report stats and the top 10 rebuilds
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"""
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print(f"Total source files: {len(build_units.keys())}")
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print(f"Total build units: {sum(units.values())}")
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# Create a sorted list by number of rebuilds
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sorted_build_units = sorted(build_units.items(),
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key=lambda item: item[1],
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reverse=True)
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print("Most rebuilt units:")
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for unit, count in sorted_build_units[:20]:
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print(f" {unit} built {count} times")
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print("Least rebuilt units:")
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for unit, count in sorted_build_units[-10:]:
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print(f" {unit} built {count} times")
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if __name__ == "__main__":
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if len(argv) != 2:
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script_name = path.basename(argv[0])
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print(f"Usage: {script_name} <path_to_compile_commands.json>")
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exit(1)
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cc_path = argv[1]
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if path.isfile(cc_path) and access(cc_path, R_OK):
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units = extract_build_units(cc_path)
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analyse_units(units)
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exit(0)
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else:
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print(f"{cc_path} doesn't exist or isn't readable")
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exit(1)
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