Fix prefetch train pipeline #3306
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Summary: there are 2 bugs * a random stream is used as default stream * prefetch stream is not waited by pipelined_forward Differential Revision: D80268824
Summary: Pull Request resolved: pytorch#3306 there are 2 bugs * a random stream is used as default stream * prefetch stream is not waited by pipelined_forward Differential Revision: D80268824
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Summary:
there are 2 bugs
Rollback Plan:
Differential Revision: D80268824