[phi] Update graph_send_recv OP#40509
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ZeyuChen merged 11 commits intoPaddlePaddle:developfrom Mar 22, 2022
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DesmonDay
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wawltor
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Mar 15, 2022
| {"pool_type", "out_size"}, | ||
| {"Out", "Dst_count"}); | ||
| } | ||
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| ctx.template Alloc<T>(out); | ||
| T* p_output = out->data<T>(); | ||
| const auto& src_dims = x.dims(); | ||
| int64_t memset_size = 1; |
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这里有个疑问，这里预置shape的目的是什么了？是否要对设置的out_size与实际的size进行检查了？
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预置shape的目的是希望可以动态减小输出的实际形状。比如我输入X维度为(100, 128)，而实际要进行消息传递的结果只有节点编号最大为60，那我可以把输出shape设置为(61, 128)，其他结果则动态去掉。
这块设置检查我是想在python端处理。或者也可以在python端函数输入一个flag来确定是否要动态压缩，然后out_size我们直接自己设置为max(dst_index) + 1.
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PR types
Function optimization
PR changes
OPs
Describe
Add out_size attribute for graph_send_recv. After adding this attribute, we can set the shape of output according to actual need, which can bring us less computation cost. Take PGL GraphSage model on Reddit dataset as an example. After using this
out_sizeattribute, the model computation cost decreased. We can see the following picture for a look.