126 lines
4.0 KiB
Python
Executable File
126 lines
4.0 KiB
Python
Executable File
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# Copyright (c) 2019 Huawei Technologies Co., Ltd.
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# A-Tune is licensed under the Mulan PSL v1.
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# You can use this software according to the terms and conditions of the Mulan PSL v1.
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# You may obtain a copy of Mulan PSL v1 at:
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# http://license.coscl.org.cn/MulanPSL
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# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
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# PURPOSE.
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# See the Mulan PSL v1 for more details.
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# Create: 2019-10-29
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"""
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The sub class of the Configurator, used to change the affinity of tasks.
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"""
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import sys
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import logging
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import subprocess
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import re
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if __name__ == "__main__":
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sys.path.insert(0, "./../../")
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from configurator.common import *
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logger = logging.getLogger(__name__)
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class TaskAffinity(Configurator):
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"""To change the affinity of tasks"""
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_module = "AFFINITY"
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_submod = "TASK"
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_option = "taskset -p"
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def __init__(self, user=None):
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Configurator.__init__(self, user)
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self._set.__func__.__doc__ = Configurator._set.__doc__ % (
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'pid or task_name', 'cpumask in hex, no "0x" prefix, "," is permitted')
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def __get_task_id(self, key):
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if key.isdecimal():
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id = key
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name = None
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else:
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id = None
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name = key.replace("(", "\(")
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name = name.replace(")", "\)")
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if id is None:
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output = subprocess.check_output("ps -e".split(),
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stderr=subprocess.STDOUT)
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pattern = "^\ *(\d.*?)\ +(.*?)\ +(.*?)\ +" + name
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searchObj = re.search(
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pattern,
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output.decode(),
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re.ASCII | re.MULTILINE)
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if searchObj is not None:
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id = searchObj.group(1)
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return id
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def _get(self, key):
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id = self.__get_task_id(key)
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if id is None:
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err = LookupError("Fail to find task {}".format(key))
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logger.error(
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"{}.{}: {}".format(
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self.__class__.__name__,
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sys._getframe().f_code.co_name,
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str(err)))
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raise err
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output = subprocess.check_output(
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"{opt} {pid}".format(
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opt=self._option,
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pid=id).split(),
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stderr=subprocess.STDOUT)
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pattern = "^pid.*?current affinity mask:\ (.+)"
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searchObj = re.search(
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pattern,
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output.decode(),
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re.ASCII | re.MULTILINE)
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if searchObj is None:
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err = GetConfigError("Fail to find {} affinity".format(key))
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logger.error(
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"{}.{}: {}".format(
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self.__class__.__name__,
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sys._getframe().f_code.co_name,
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str(err)))
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raise err
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return searchObj.group(1)
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def _set(self, key, value):
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id = self.__get_task_id(key)
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if id is None:
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err = LookupError("Fail to find task {}".format(key))
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logger.error(
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"{}.{}: {}".format(
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self.__class__.__name__,
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sys._getframe().f_code.co_name,
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str(err)))
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raise err
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mask = value.replace(",", "")
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return subprocess.call(
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"{opt} {mask} {pid}".format(
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opt=self._option,
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mask=mask,
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pid=id).split(),
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stdout=subprocess.DEVNULL,
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stderr=subprocess.DEVNULL)
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def _check(self, config1, config2):
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config1 = config1.replace(",", "")
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config2 = config2.replace(",", "")
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return int(config1, base=16) == int(config2, base=16)
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if __name__ == "__main__":
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if len(sys.argv) != 2:
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print('usage: ' + sys.argv[0] + ' key=value')
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sys.exit(-1)
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ct = TaskAffinity("UT")
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print(ct.set(sys.argv[1]))
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print(ct.get(ct._getcfg(sys.argv[1])[0]))
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