python占用指定比例CPU

 

 

# author: xiaoyang
# date: 2025/09/28import os
import sys
import time
from multiprocessing import Processdef ac_cpu(timeout=None):t0 = time.time()while timeout and time.time() - t0 < timeout:1024 ** 1024if __name__ == '__main__':ratio = 0.5delay = 10 * 60if '-h' in sys.argv:exit('usage:\npython cpu_a.py [float] [float]\nsample:\npython cpu_a.py 0.5 60')else:if len(sys.argv) > 1:ratio = float(sys.argv[1])if len(sys.argv) > 2:delay = float(sys.argv[2])ac = int(os.cpu_count() * ratio)print(f'共{os.cpu_count()}核，占用{ac}核, 持续{delay}秒')ps = []for i in range(ac):p = Process(target=ac_cpu, kwargs={'timeout': delay}, daemon=True)ps.append(p)p.start()for p in ps:p.join()