cannot re-initialize CUDA in forked subprocess

在使用Python中的multiprocessing模块调用torch模型时，如果使用了fork创建子进程，就会报错"RuntimeError: Cannot re-initialize CUDA in forked subprocess"。这是因为在子进程中无法重新初始化CUDA。解决这个问题的方法是使用spawn作为启动方法，确保在if __name__=='__main__':语句块中设置torch.multiprocessing.set_start_method('spawn')。这样就可以避免这个错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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