* Add Temporal Allocator

* add Temporay Allocator to DeviceContext
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* code refine
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* fix mean_iou
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* Add DeviceTemporaryAllocator
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* fix conv_op bug
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* small fix
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* code refine
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* log refine
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* fix unit test
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* move double check

* refine concat_and_split
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* add limit_of_temporary_allocation
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* fix name
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fix comment
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* add doc for MergeSelectedRows
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* checkout selected_rows
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This reverts commit 3d750f9c.

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* Add test items for mkldnn conv2d

* Fix the regression issue and pass the unit test for conv2d and conv3d

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* refine parallel_executor

* remove uncessary code
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* wip

* wip

* wip

* wip for test

* add fp16 tests test=develop

* fix cpu build test=develop

* fix test=develop

* fix py3 tests test=develop

* fix lr_scheduler dtype test=develop

* fix test=dvelop

* test fix ci compile test=develop

* fix build and merge test=develop

* fallback momentumop change to general test=develop

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* fix utils config, test=develop

* reweite tools in lookup table utils, test=develop

* merge develop, test=develop

* add copy in setup, test=develop

* update api spec, test=develop

* add doc, test=develop

* prettifying doc, test=develop

* Update API.spec

update api.spec, test=develop

* Update lookup_table_utils.py

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* Update lookup_table_utils.py

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* merge develop, test=develop

* merge develop, test=develop

* init fix, test=develop

* fix in downloads, test=develop

* fix in setup.in, test=develop

* Avoid calling VLOG() when program exiting
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* Avoid calling VLOG() when program exiting
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enhance test precision

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* MKLDNN residual connection fuse: conv op reused

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* MKLDNN residual connection fuse: added prints for checking fuse

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* MKLDNN residual connection fuse: add more prints

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* MKLDNN residual connection fuse: add hash function. test=develop

* MKLDNN residual connection fuse: add hash to elementwise_add

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* MKLDNN residual connection fuse: add more hashes. test=develop

* MKLDNN residual connection fuse: added hashes to relu

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* MKLDNN residual connection fuse: do not fuse when fuse_relu is on

* MKLDNN residual connection fuse: check if fuse_relu attribute is set

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* MKLDNN residual connection fuse: comment out some printouts

* MKLDNN residual connection fuse: remove unused functions in the pass code

* MKLDNN residual connection fuse: delete commented hashes and printouts

* MKLDNN residual connection fuse: remove unnecessary includes. test=develop

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* Enable mul operator for a ngraph
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* Enable activation ops test
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* Remove unused line
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* - Added transpose MKLDNN Op
- Few basic UT works
- Added 1D transpose
- implementing generic mem desc for MKLDNN transpose
- Modified trnaspose op to support  more dimensional data eg. 5,6..10
- Added is_test attribute to transpose op

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* - Added support for MKLDNN::memory::format::any for Transpose MKLDNN op

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* - Additional transpose mkldnn op correction to mkldnn layout

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* Cosmetic fixes

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* - Removed const_cast to obey coding standard

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