Merge pull request !5140 from zyli2020/add_cuda_path_check

Merge pull request !5051 from jjfeing/master

Merge pull request !5048 from baihuawei/0821

Merge pull request !5035 from zhoufeng/xiu-ba-ge

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

Merge pull request !4954 from tom_chen/cross_entropy

Merge pull request !4996 from 34bunny/GPU-RandomChoiceWithMask-fixv2

Merge pull request !4590 from qujianwei/master

Merge pull request !3957 from chenweifeng/strided_slice_dims_exceeds

Merge pull request !4946 from ZPaC/master-get-server-rank-in-python

fix white space

Merge pull request !4935 from VectorSL/conv-fix

Merge pull request !4809 from zhaoting/master

Merge pull request !4691 from linqingke/new_ops

Merge pull request !4706 from Peilin/smoothL1Loss-fix

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

Merge pull request !4475 from JonathanY/batchnormgrad

Merge pull request !4758 from VectorSL/nhwc-support

Merge pull request !4559 from chenweifeng/warning

Merge pull request !4221 from limingqi107/master

replace frontend/operator/ops.h in backend with base/core_ops.h as
backend should not use any frontend-only primitive

Merge pull request !4760 from baihuawei/loss

Merge pull request !4764 from zyli2020/gpu_bn_op_perf_optimize

fix pylint

changed doc and code for SmoothL1Loss to be same a dchip. fixed grad kernel

fix ci

Merge pull request !4704 from chengang/fix_ps_multi_worker

Merge pull request !4436 from peixu_ren/custom_gpu

Merge pull request !4699 from danishnxt/GPU_two

fix ci

fix ci