* config

* fix unittest

* zero init & cache & patch config

* add barrier to save and load

* add unittest

* save load

* save load

* add unittest

* first commit

* second commit

* third commit

* remove SaveLocalFS in memory sparse table

* save dense param

* update

* push slot

* fix push show clk: int -> float

* add unittest

* fix sample

* unittest

* add AsExtra for op

* unittest

* modify fs.py

* modify fs.py

* fix some bugs

* add dataset hdfs config

* local change

* dataset use differenct hadoop ugi/fs_name

* add

* fix conflict

* fix

* remove logs

* code style

* fix

* code style

* code style

* fix

* code style

* save_dense_param

* fix

* fix

* fix

* fix

* change momentum in dense optimzer

* fix

* fix

* change fluid => paddle.static

* remove some unuseful code
Co-authored-by: Nesythan <esythan@126.com>

* fix sign-compare warning

* fix sign-compare 2

* delete function

* fix bug

* update name

* fix bug in strategy

* modify api name of ps accessor

* update

* code format

* change to new api in ssync mode

* fix

* fix

* fix

* fix

* fix benchmark and communicator config

* fix bugs of the_one_ps

* multi program and fix bug in optimizer

* multi program in the_one_ps

* public commcontext

* ps optimizer multi programs

* cvm & datanorm backend

* fix dim

* fix unittest

* fix

* the one ps merge

* remove comm

* add DownpourLiteWorker

* all

* fix

* fix

* device worker downpour lite

* fix

* fix bug in global shuffle

* save inference model

* fix & add log

* fix

* remove log

* fix

* fix save summary

* fix

* fix pscore

* fix

* fix

* fix

* fix

* fix

* remove logs

* fix

* fix

* fix

* fix

* fix

* add some comments

* fix
Co-authored-by: Nesythan <esythan@126.com>

* test

* rm test

* add memory_sparse_table and brpc communication upgrade dependency

* fix

* add dense optimizer & fix dump bug & add some strategy fields

* fix

* fix

* remove thread_pool thread_queue

* add memory sparse table

* update memory sparse table

* update memory sparse table

* update cmake

* upgrade brpc_ps_client

* remove show/click_const in ctr_accessor

* fix deconstructor