linux 计算cpu占用率

cpu  2255 34 2290 22625563 6290 127 456

CPU_Usage = (user + nice + system + irq + softirq) / (user + nice + system + idle + iowait + irq + softirq)

import time

def get_cpu_usage():
    with open('/proc/stat', 'r') as f:
        cpu_stats = f.readline().split()
    
    user, nice, system, idle, iowait, irq, softirq = map(int, cpu_stats[1:8])
    total_time = user + nice + system + idle + iowait + irq + softirq
    idle_time = idle + iowait
    
    time.sleep(1)  # 等待1秒以获取变化量
    
    with open('/proc/stat', 'r') as f:
        cpu_stats = f.readline().split()
    
    user, nice, system, idle, iowait, irq, softirq = map(int, cpu_stats[1:8])
    total_time_new = user + nice + system + idle + iowait + irq + softirq
    idle_time_new = idle + iowait
    
    total_time_diff = total_time_new - total_time
    idle_time_diff = idle_time_new - idle_time
    
    cpu_usage = (total_time_diff - idle_time_diff) / total_time_diff * 100
    return cpu_usage

if __name__ == "__main__":
    print(f"Current CPU Usage: {get_cpu_usage():.2f}%")