mirror of
https://git.yoctoproject.org/poky
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cee685ca0d
Add a new utility class for dropping Linux kernel caches. It uses sudo and tee to write to the drop_caches file. Checking if the user has the permissions to drop caches (without a password) is done by trying to writing an invalid value to the drop_caches file. This way, we will find if writing (with tee) is possible but not really dropping caches, yet. User can avoid giving the password by adding something like: <user> ALL = NOPASSWD: /usr/bin/tee /proc/sys/vm/drop_caches to the system sudoers file. (From OE-Core rev: c9cb248429ced50c96d11ba5361c272d4c9b9323) Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
84 lines
2.2 KiB
Python
Executable File
84 lines
2.2 KiB
Python
Executable File
#!/usr/bin/python3
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#
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# Build performance test script
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#
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# Copyright (c) 2016, Intel Corporation.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms and conditions of the GNU General Public License,
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# version 2, as published by the Free Software Foundation.
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#
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# This program is distributed in the hope it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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#
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"""Build performance test script"""
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import argparse
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import logging
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import os
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import sys
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sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)) + '/lib')
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import scriptpath
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scriptpath.add_oe_lib_path()
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from oeqa.buildperf import KernelDropCaches
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from oeqa.utils.commands import runCmd
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# Set-up logging
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LOG_FORMAT = '[%(asctime)s] %(levelname)s: %(message)s'
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logging.basicConfig(level=logging.INFO, format=LOG_FORMAT)
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log = logging.getLogger()
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def pre_run_sanity_check():
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"""Sanity check of build environment"""
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build_dir = os.environ.get("BUILDDIR")
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if not build_dir:
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log.error("BUILDDIR not set. Please run the build environmnent setup "
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"script.")
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return False
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if os.getcwd() != build_dir:
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log.error("Please run this script under BUILDDIR (%s)", build_dir)
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return False
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ret = runCmd('which bitbake', ignore_status=True)
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if ret.status:
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log.error("bitbake command not found")
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return False
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return True
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def parse_args(argv):
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"""Parse command line arguments"""
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parser = argparse.ArgumentParser(
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formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument('-D', '--debug', action='store_true',
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help='Enable debug level logging')
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return parser.parse_args(argv)
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def main(argv=None):
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"""Script entry point"""
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args = parse_args(argv)
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if args.debug:
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log.setLevel(logging.DEBUG)
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if not pre_run_sanity_check():
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return 1
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# Check our capability to drop caches and ask pass if needed
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KernelDropCaches.check()
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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