* remove allreduce before c_allgather

* update reshard insert_fill_constant_op func

* insert_fill_constant_op add shape arg

This reverts commit 15c87528.

* [Fix]fix cleandoc with a first blank line

* [Fix]fix metrics.py code-block

* [Fix]fix metrics.py code-block indent

* add lerp bf16 support

* fix bug

* Update test_lerp_op.py

modify the input dtype

* modify the test_lerp_op.py

* Update test_lerp_op.py

* fix bug of import

* add user_defined_grads

* Update test_lerp_op.py

* fix bug of grad

* fix bug of grad

* fix bug of grad

* add the check for bfloat16 dtype

* add linear_compress API

replace the PolynomialDecay、NoamDecay、LinearLrWarmup、ReduceLROnPlateau in fluid with 2.0 version (#54806)

* remove the ReduceLROnPlateau in fluid

* fix bug

* remove the PolynomialDecay in fluid

* remove the LinearLrWarmup in fluid

* fix bug

* remove the NoamDecay in fluid

* fix bug

* fix bug

* fix bug

[prim] modify multiply_double_grad composite rules to solve paddlescience poiseuille_flow.py problem (#54908)

* modify eular_beam

* modify matmul infermeta

* add test

* modify timeout

* modify mutiply_double nullptr

* modify tanh_triple_gradnode create

* COPY FROM issue of paddle nn

* 移除额外添加的示例，并修改Examplex->Examples

* remove example name of transformer

* fix vpp mp init prob

* triger ci

* update dygraph collective

fix ut

* remove debug log

* style

* more

* update ctest

* Update legacy_backward.yaml

* Update legacy_ops.yaml

* Update legacy_ops.yaml

* update

* update

* update for move

* add skip_gc_vars for 1f1b schedule mode

* add pp_degree and pp_stage

* remove function sequence_conv_pool

* fix test_glu.py

* remove function scaled_dot_product_attention

* remove function img_conv_group

* remove function simple_img_conv_pool

* delete the nets.py

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* Update test_image_classification.py

* Update test_recognize_digits.py

* Update test_recommender_system.py

* Update test_image_classification_fp16.py

* fix bug

* fix bug

* fix bug

* remove the nets.py in fluid

* fix bug

* fix the codestyle

* fix conflict

* fix bug

* Fix TODO

* add clone for inpalce

* fix name

* add inplace pow

* fix typro

* add note

* fix typro

* fix typro

* fix bug

* fix test error

* add type error test

* adjust indentation

* add gc for multi jobs

* fix job.h

* update OpInfo to OpInOutInfo

* update get_skip_gc_vars algo order

* demo1

* add test cases

* modify the usage of StepDecay

* refine

* replace PiecewiseDecay(LearningRateDecay) with PiecewiseDecay(LRScheduler)

* fix bug

* fix bug

* replace the StepDecay,MultiStepDecay,LambdaDecay with 2.0 version

* add pos_weight in kernel

* fix unittest

* fix xpu

* fix bce unittest, change infermeta order

* [ROCM] fix cupti, hipcub

* update

* update

* [kunlun] fix the dataloader problem in RDMA env

When running multi-machine training with Paddle DataLoader, an
unexpected segmentfault will be raised in DataLoader Process,
where the traceback goes all back to a runtime error that dataloader
workers exit unexpectedly. Similar problems have been discussed
that lead to a misbehavior of OpenCV working in multiprocessing
environment.
See
https://stackoverflow.com/questions/54013846/pytorch-dataloader-stucked-if-using-opencv-resize-method

* code style

* fix 'RuntimeError: context has already been set'

* Update dataloader_iter.py

spawn method raise error 'Can't pickle local object' in some situations

* code format check

* code style

* modify eular_beam

* modify matmul infermeta

* add test

* modify timeout

* base rule

* add sharidng merge

* add sharidng axis merge

* define unified data class for inferencing dist_attr

* test wrap DistTensorSpec in dygraph mode

* matmul main logic done

* define unified data class for inferencing dist_attr

---------
Co-authored-by: NYichen Zhang <zhangyichen03@baidu.com>

* remove the CosineDecay in fluid

* Update test_basic_api_transformation.py

* remove the NaturalExpDecay in fluid

* fix bug

* remove the ExponentialDecay in fluid

* remove the InverseTimeDecay in fluid

* remove the InverseTimeDecay class

* fix bug

* add fetch kernel

* support fetch var in new ir

* fix bug

* polish code

* change array equal to np.testing

* support feed in new ir

* fix bug

* try to hack combine op

* add scope guard

* revert atan2 op

* polish code

* [XPU] support xpu runtime profiler: follow up

* fix compile issue