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test=develop

size_t is an unsigned integer, with a conversion rank
 larger than int, therefore in the following expression
 the int value was promoted to size_t, making it a
 subtraction of unsigned values. The result of such
 a subtraction is also an unsigned value.

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test=develop

1. graph and program_desc alignment
2. trt stream

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test=develop

fix comments

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* Choose to turn on use_mkldnn attribute v1

* Fix mkldnn_op empty bug

* format change test=develop

* fix ci test=develop

* fix ci test and add test in dam test=develop

* add example to dam compare test test=develop

* review changes test=develop

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* Initialize the elementwise plugin.

* Implement the basic CUDA kernel of elementwise plugin.
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test=develop

the parameters will load from CPUPlace, that will keep copying data
between CPU and GPU places.

test=develop

test=develop