[collective] dynamic shape for send_v2 and recv_v2 #42765
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update the new_group in dygraph
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gongweibao
requested changes
May 13, 2022
gongweibao
reviewed
May 16, 2022
Shixiaowei02
approved these changes
May 18, 2022
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Describe
send_v2_op (cuda) 与 recv_v2_op (cuda) 修改如下：
修改 attribute，新增dynamic_shape属性（optional，默认值False），作为分布式训练send/recv是否使用动态shape的标识使用。
支持send_v2_op与recv_v2_op的动态shape支持。当设置dynamic_shape属性为True后，send op会首先发送tensor的shape之后再发送tensor。相应的recv op会先接受tensor的shape，并根据接受到的shape修改需要接受的tensor的shape，之后再进行tensor的接受。
support dynamic_shape for send/recv op for gpu training
add a new attr 'dynamic_shape' for both send_v2 and recv_v2, only support gpu with single tensor for now