관리-도구

편집 파일: function_calc_isolated_cores.py

import os import glob import tuned.logs from . import base import tuned.consts as consts from tuned.utils.commands import commands log = tuned.logs.get() cmd = commands() class calc_isolated_cores(base.Function): """ Calculates and returns isolated cores. The argument specifies how many cores per socket reserve for housekeeping. If not specified, 1 core per socket is reserved for housekeeping and the rest is isolated. """ def __init__(self): # max 1 argument super(calc_isolated_cores, self).__init__("calc_isolated_cores", 1) def execute(self, args): if not super(calc_isolated_cores, self).execute(args): return None cpus_reserve = 1 if len(args) > 0: if not args[0].isdecimal() or int(args[0]) < 0: log.error("invalid argument '%s' for builtin function '%s', it must be non-negative integer" % (args[0], self._name)) return None else: cpus_reserve = int(args[0]) topo = {} for cpu in glob.iglob(os.path.join(consts.SYSFS_CPUS_PATH, "cpu*")): cpuid = os.path.basename(cpu)[3:] if cpuid.isdecimal(): physical_package_id = os.path.join(cpu, "topology/physical_package_id") # Show no errors when the physical_package_id file does not exist -- the CPU may be offline. if not os.path.exists(physical_package_id): log.debug("file '%s' does not exist, cpu%s offline?" % (physical_package_id, cpuid)) continue socket = self._cmd.read_file(physical_package_id).strip() if socket.isdecimal(): topo[socket] = topo.get(socket, []) + [cpuid] isol_cpus = [] for cpus in topo.values(): cpus.sort(key = int) isol_cpus = isol_cpus + cpus[cpus_reserve:] isol_cpus.sort(key = int) return ",".join(cmd.cpulist_pack(isol_cpus))