Merge pull request !2256 from JesseKLee/sampler

Merge pull request !2198 from h.farahat/mask_op

Merge pull request !2255 from Peilin/bucket-batch-doxygen-fix

Merge pull request !2142 from Tinazhang/reorg-visualize

Merge pull request !2247 from yanghaoran/master

Merge pull request !2249 from ms_yan/numpy_slice_repair

Merge pull request !2092 from qianlong21st/june_third

Merge pull request !2242 from panfengfeng/modify_info_level

Merge pull request !2164 from lianliguang/master

Merge pull request !2225 from VectorSL/shape-check

Merge pull request !2243 from panfengfeng/revert-merge-2189-master

Merge pull request !2227 from jjfeing/master

Merge pull request !2238 from guozhijian/fix_doc_format

Merge pull request !2192 from baihuawei/cpulstm

Merge pull request !2210 from limingqi107/max_device_memory_optimize

Merge pull request !2183 from limingqi107/gpu_pynative_optimize

Merge pull request !2224 from liyong126/mindrecord_fix_mi

Merge pull request !2189 from ms_yan/numpy_slice_repair

Merge pull request !2217 from chengxb7532/cxb_st

Merge pull request !2186 from Kang/opt

Merge pull request !2209 from chenzhongming/master

Merge pull request !2215 from caifubi/support-hccl-profiling

Merge pull request !2203 from huanghui/single-batchnorm-fission-pass

Merge pull request !2216 from pengyanjun/fix_generatordataset_para_check

Merge pull request !2204 from zhangbuxue/add_check_for_tensor_slice_before_convert_to_ops

Merge pull request !2069 from liuxiao/fix-input-value-check-for-SparseApplyFtrl-and-SparseApplyAdaGrad