Python使用psutil实现系统监控与资源管理

pip install psutil

import psutil

print("当前 CPU 使用率：", psutil.cpu_percent(interval=1), "%")

print("物理核心数：", psutil.cpu_count(logical=False))
print("逻辑核心数：", psutil.cpu_count(logical=True))

import time

for _ in range(5):
    usage = psutil.cpu_percent(interval=1, percpu=True)
    print("每个核心使用率：", usage)

times = psutil.cpu_times()
print(f"user: {times.user}, system: {times.system}, idle: {times.idle}")

mem = psutil.virtual_memory()
print(f"总内存: {mem.total / 1024 ** 3:.2f} GB")
print(f"已使用: {mem.used / 1024 ** 3:.2f} GB")
print(f"空闲: {mem.available / 1024 ** 3:.2f} GB")
print(f"使用率: {mem.percent}%")

swap = psutil.swap_memory()
print(f"Swap 总量: {swap.total / 1024 ** 3:.2f} GB")
print(f"使用率: {swap.percent}%")

partitions = psutil.disk_partitions()
for p in partitions:
    print(f"挂载点: {p.mountpoint}, 类型: {p.fstype}")

usage = psutil.disk_usage('/')
print(f"总空间: {usage.total / 1024 ** 3:.2f} GB")
print(f"已用: {usage.used / 1024 ** 3:.2f} GB")
print(f"剩余: {usage.free / 1024 ** 3:.2f} GB")

io = psutil.disk_io_counters()
print(f"读字节: {io.read_bytes / 1024 ** 2:.2f} MB")
print(f"写字节: {io.write_bytes / 1024 ** 2:.2f} MB")

net = psutil.net_io_counters()
print(f"发送: {net.bytes_sent / 1024 ** 2:.2f} MB")
print(f"接收: {net.bytes_recv / 1024 ** 2:.2f} MB")

addrs = psutil.net_if_addrs()
for iface, infos in addrs.items():
    print(f"\n网卡: {iface}")
    for info in infos:
        print(f"  地址: {info.address} ({info.family})")

conns = psutil.net_connections(kind='inet')
for conn in conns[:5]:
    print(f"连接: {conn.laddr} -> {conn.raddr}, 状态: {conn.status}")

for proc in psutil.process_iter(['pid', 'name', 'username']):
    print(proc.info)

p = psutil.Process(1)  # PID 1 通常是 init 或 systemd
print(f"名称: {p.name()}")
print(f"路径: {p.exe()}")
print(f"状态: {p.status()}")
print(f"CPU使用率: {p.cpu_percent(interval=1.0)}")
print(f"内存使用: {p.memory_info().rss / 1024 ** 2:.2f} MB")

p = psutil.Process(1234)
p.suspend()  # 挂起
p.resume()   # 恢复
p.terminate()  # 终止

import psutil
import time
import os

def monitor():
    while True:
        os.system('cls' if os.name == 'nt' else 'clear')
        print("=== 实时系统资源监控 ===")
        print(f"CPU 使用率: {psutil.cpu_percent()}%")
        mem = psutil.virtual_memory()
        print(f"内存: {mem.used / 1024 ** 3:.2f} GB / {mem.total / 1024 ** 3:.2f} GB ({mem.percent}%)")
        net = psutil.net_io_counters()
        print(f"网络: 发送 {net.bytes_sent / 1024 ** 2:.2f} MB, 接收 {net.bytes_recv / 1024 ** 2:.2f} MB")
        time.sleep(1)

if __name__ == "__main__":
    monitor()

def auto_kill(threshold=80):
    for proc in psutil.process_iter(['pid', 'name', 'cpu_percent']):
        try:
            if proc.info['cpu_percent'] > threshold:
                print(f"杀死高 CPU 进程: {proc.info}")
                psutil.Process(proc.info['pid']).terminate()
        except (psutil.NoSuchProcess, psutil.AccessDenied):
            continue

import json
import datetime

def log_stats():
    stats = {
        "time": str(datetime.datetime.now()),
        "cpu": psutil.cpu_percent(),
        "mem": psutil.virtual_memory().percent,
        "disk": psutil.disk_usage('/').percent,
    }
    with open("syslog.json", "a") as f:
        f.write(json.dumps(stats) + "\n")