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Use std::forward_list for fast destruction 

Helps avoid constructing the vector which is usually not used.

PiperOrigin-RevId: 281325666
Change-Id: Ie7bd6ec72412245de590b75a76c3c22b00650bd0
This commit is contained in:
Gaurav Jain 2019-11-19 10:33:41 -08:00 committed by TensorFlower Gardener
parent a6ceaa8440
commit ddbdb4a7fd
1 changed files with 10 additions and 8 deletions
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18
tensorflow/core/common_runtime/eager/eager_executor.cc
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@ -15,6 +15,8 @@ limitations under the License.
#include "tensorflow/core/common_runtime/eager/eager_executor.h"
#include <forward_list>
#include "tensorflow/core/lib/core/errors.h"
#include "tensorflow/core/lib/gtl/cleanup.h"
@ -175,13 +177,13 @@ void EagerExecutor::NodeDone(const core::RefCountPtr<NodeItem>& item,
const Status& status) {
DVLOG(3) << "Node Done: [id " << item->id << "] " << item->node->DebugString()
<< " with status: " << status.ToString();
std::vector<core::RefCountPtr<NodeItem>> items_to_destroy;
{
DCHECK(item->state != NodeState::kDONE);
auto previous_state = item->state;
item->state = NodeState::kDONE;
if (!ok()) return;
DCHECK(item->state != NodeState::kDONE);
auto previous_state = item->state;
item->state = NodeState::kDONE;
if (!ok()) return;
std::forward_list<core::RefCountPtr<NodeItem>> items_to_destroy;
{
mutex_lock l(node_queue_mutex_);
bool need_notification = false;
if (previous_state == NodeState::kPENDING) {
@ -210,11 +212,11 @@ void EagerExecutor::NodeDone(const core::RefCountPtr<NodeItem>& item,
"operations and poisons their output tensors.");
}
while (!node_queue_.empty()) {
items_to_destroy.push_back(std::move(node_queue_.front()));
items_to_destroy.push_front(std::move(node_queue_.front()));
node_queue_.pop();
}
for (auto& it : unfinished_nodes_) {
items_to_destroy.push_back(std::move(it.second));
items_to_destroy.push_front(std::move(it.second));
}
unfinished_nodes_.clear();
}