python如何计算节点创建cgroups绑定虚拟核心

Python如何计算节点创建cgroups绑定虚拟核心

Python可以使用标准库中的subprocess模块来计算节点创建cgroups绑定虚拟核心。首先，我们需要使用subprocess.check_output函数来获取节点的cgroups信息，然后使用正则表达式来提取虚拟核心数量。

import subprocess import re def get_node_cores(node_name): """Get the number of virtual cores of a node by its name Args: node_name (str): The name of the node Returns: int: The number of virtual cores of the node Raises: ValueError: If the node name is not valid """ # Get the cgroups info of the node try: output = subprocess.check_output(["cgm", "info", node_name], universal_newlines=True) except subprocess.CalledProcessError: raise ValueError("Invalid node name: %s" % node_name) # Extract the number of virtual cores from the cgroups info match = re.search(r"cpuset.cpus=(\d+)", output) if match: return int(match.group(1)) else: raise ValueError("Failed to get the number of virtual cores of node %s" % node_name)