Merge pull request !4846 from yuximiao/gpu_comments

Merge pull request !4820 from shenwei41/sw_master

Merge pull request !4830 from yuchaojie/gpu_allreduce

Merge pull request !4845 from zhangxinfeng3/master

Merge pull request !4838 from wangmin0104/master

Merge pull request !4874 from peixu_ren/custom_bijector

Merge pull request !4875 from XunDeng/pp_issue_branch

Merge pull request !4871 from JesseKLee/tdt

Merge pull request !4472 from anthonyaje/gpu_queue_size

change buffer type and chunk size

addressed sendtensor issue for large tensors

fix sendtensor part 2

fix bugs for sendtensor issue

fix CI errors

removes a print line

address comments

Merge pull request !4706 from Peilin/smoothL1Loss-fix

Merge pull request !4314 from nhussain/clean_up_bindings

Merge pull request !4683 from yoonlee666/cisplit

Merge pull request !4771 from EricZ/md_tensor_from_mem

Merge pull request !4843 from xychow/remove-ccsrc-common-h

Merge pull request !4475 from JonathanY/batchnormgrad

Merge pull request !4857 from tom_chen/deepfm_lr

Merge pull request !4858 from zhaodezan/master

Merge pull request !4819 from zyli2020/Add_FusedBatchEx_support

Merge pull request !4824 from hanjun996/master

Merge pull request !4837 from 陶云浩/arithmetic0

Merge pull request !4847 from xiefangqi/xfq_add_numworker_validate

Merge pull request !4850 from liuxiao78/master

Merge pull request !4839 from wangchangkai/master

Merge pull request !4839 from wangchangkai/master

Merge pull request !4855 from wangshaocong/lite_cmake

Merge pull request !4698 from Giancarlo/setshape_constmult

Merge pull request !4688 from amongo/FixBoolParse

Merge pull request !4848 from chengang/unique_id_5

Merge pull request !4835 from huangxinjing/outbrain-eval