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文件名称：限制内存和CPU的使用量-python cookbook(第3版)高清中文完整版
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更新时间：2021-06-10 05:20:11
python cookbook 第3版 高清 中文完整版
13.14 限制内存和CPU的使用量
问题
You want to place some limits on the memory or CPU use of a program running on Unix
system.
解决方案
The resource module can be used to perform both tasks. For example, to restrict CPU time,
do the following:
import signal import resource import os
def time_exceeded(signo, frame):
print(“Time’s up!”) raise SystemExit(1)
def set_max_runtime(seconds):
# Install the signal handler and set a resource limit soft, hard =
resource.getrlimit(resource.RLIMIT_CPU) resource.setrlimit(resource.RLIMIT_CPU,
(seconds, hard)) signal.signal(signal.SIGXCPU, time_exceeded)
if __name__ == ‘__main__’:
set_max_runtime(15) while True:
pass
When this runs, the SIGXCPU signal is generated when the time expires. The program can
then clean up and exit. To restrict memory use, put a limit on the total address space in use.
For example:
import resource
def limit_memory(maxsize):
soft, hard = resource.getrlimit(resource.RLIMIT_AS)
resource.setrlimit(resource.RLIMIT_AS, (maxsize, hard))