Merge pull request #8011 from chengduoZH/feature/refine_feed_op

Refine feed_op

Author: chengduo

paddle/operators/feed_op.cc

@@ -52,7 +52,11 @@ class FeedOp : public framework::OperatorBase {
  platform::DeviceContextPool &pool = platform::DeviceContextPool::Instance();
  auto &dev_ctx = *pool.Get(place);
 
- framework::Copy(feed_item, place, dev_ctx, out_item);
+ if (platform::is_same_place(feed_item.place(), place)) {
+ out_item->ShareDataWith(feed_item);
+ } else {
+ framework::Copy(feed_item, place, dev_ctx, out_item);
+ }
  out_item->set_lod(feed_item.lod());
  }
 };