47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
# 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 base classes and functionality"""
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from oeqa.utils.commands import runCmd
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class KernelDropCaches(object):
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"""Container of the functions for dropping kernel caches"""
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sudo_passwd = None
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@classmethod
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def check(cls):
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"""Check permssions for dropping kernel caches"""
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from getpass import getpass
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from locale import getdefaultlocale
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cmd = ['sudo', '-k', '-n', 'tee', '/proc/sys/vm/drop_caches']
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ret = runCmd(cmd, ignore_status=True, data=b'0')
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if ret.output.startswith('sudo:'):
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pass_str = getpass(
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"\nThe script requires sudo access to drop caches between "
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"builds (echo 3 > /proc/sys/vm/drop_caches).\n"
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"Please enter your sudo password: ")
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cls.sudo_passwd = bytes(pass_str, getdefaultlocale()[1])
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@classmethod
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def drop(cls):
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"""Drop kernel caches"""
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cmd = ['sudo', '-k']
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if cls.sudo_passwd:
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cmd.append('-S')
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input_data = cls.sudo_passwd + b'\n'
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else:
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cmd.append('-n')
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input_data = b''
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cmd += ['tee', '/proc/sys/vm/drop_caches']
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input_data += b'3'
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runCmd(cmd, data=input_data)
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