* try again if kunlun memory malloc failed

* minor

* support xpu inference with analysis predictor, test=develop

* merge the cmake of the xpu toolchain, test=develop

* add c-apis, test=develop

* fix a bug in extern_xpu, test=develop

As the title

* support setup.py to compile custom op

* move file into paddle.utils.cpp_extension

* support python setup.py install

* refine code style

* Enrich code and add unittest

* Polish code and api doc

* fix cpp_extension not include in package

* fix relative import

* fix os.makedirs exist_ok param compatibility PY2

* add compile flags in test_jit_load

* fix test_datasets unittest

* fix trt plugin clone and initialize bugs

* fix unit test error

* enable trt in ci py3

* update unittest timeout

* update lite tag

* disable ut

* Add cache for Transformer encoder.

* Bug fixed.

* add unittests for transformer encoder.

* dump to cpu

* format

* format

* format

fix push sparse int64 bug

* fix cc version

* fix

* add readme in whl package

* fix malloc L3 failed bug for kunlun

* minor

* update readme links

* update readme test=document_fix

* update readme test=document_fix

* [ROCM] update fluid platform for rocm35 (part1), test=develop

* address review comments, test=develop

* solve python3 incompatibility issues

* update checksum

* fix Brpc get hostname

* transformer predict

* trans bug fix

* update gather_tree doc, test=document_fix

* update sample code, test=document_fix

* remove tensor type, test=document_fix

* upgrade gather_tree to core.ops

* update gather_tree unittests

* added external reorder to profiler

* resolved conflict

* added enable_static

* initial version of lstm, not working yet

* added lstm to operators.cmake

* added vanilla lstm mkldnn op

* added peephole weights integration

* minor changes

* added formatting

* added fusion_lstm_mkldnn to static_whitelist

* added formatting

* removed comment

* moved use_peepholes attribute inside is_cached block

* reverted wrong changes

* minor formatting change

* minor changes

* changed stream handling

* minor change

* added datatype to GetExpectedKernelType()

* added reading stream from TLS

This reverts commit d834f4e6.