[hybrid] Support tensor parallel and cache structure for fused attention op.#40101
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wangxicoding merged 10 commits intoPaddlePaddle:developfrom Mar 11, 2022
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cache structure support for fuse attention
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LGTM for
set_tests_properties(test_static_model_parallel_fused_attention PROPERTIES TIMEOUT 120)
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Describe
fuse_attention_op 修改如下：
增加了
CacheKVinput（optional），用作生成模型while当中的上一轮cache的值使用。增加了
CacheKVOutoutput，作为生成模型while当中的本轮更新过后的cache的值使用。修改 attribute，新增
ring_id属性（optional，默认值-1），作为分布式训练tensor parallel的通讯组标识使用。Update fused_attention op support tensor model parallel and cache structure.
For tensor model parallel, first column parallel linear, then row parallel linear, then we will get partial out, we can use allreduce to get the final output.