modified:   ge/graph/preprocess/graph_preprocess.cc
	modified:   ge/graph/preprocess/graph_preprocess.h
	modified:   inc/external/ge/ge_api_types.h

From: @taoxiangdong
Reviewed-by: 
Signed-off-by:

From: @wangxiaotian22
Reviewed-by: @ji_chen,@sheng-nan
Signed-off-by: @ji_chen

From: @zhangxiaokun9
Reviewed-by: @wqtshg,@wangxiaotian22
Signed-off-by: @wqtshg

From: @chen_yemeng
Reviewed-by: 
Signed-off-by:

From: @zhou_chao1993
Reviewed-by: @wqtshg,@youui
Signed-off-by: @youui

From: @chen_yemeng
Reviewed-by: @sheng-nan,@wqtshg
Signed-off-by: @wqtshg

From: @jiming6
Reviewed-by: @sheng-nan,@wqtshg
Signed-off-by:

From: @wangxiaotian22
Reviewed-by: 
Signed-off-by:

From: @zhangxiaokun9
Reviewed-by: @wangxiaotian22,@xchu42,@wangxiaotian22,@xchu42
Signed-off-by: @ji_chen

* subgraph optimize multi thread env

From: @chen_yemeng
Reviewed-by: 
Signed-off-by:

From: @wan_xuelei
Reviewed-by: @xchu42,@ji_chen
Signed-off-by: @ji_chen

From: @youui
Reviewed-by: 
Signed-off-by:

From: @zhao_zhixuan
Reviewed-by: @xchu42,@ji_chen
Signed-off-by: @ji_chen

Merge pull request !728 from weiyang/performance

* 回退 'Pull Request !703 : TaskInfo release OpDesc after distribute.'

From: @jiming6
Reviewed-by: @xchu42,@xchu42,@wqtshg
Signed-off-by: