nemo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From GitBox <...@apache.org>
Subject [GitHub] [incubator-nemo] johnyangk commented on a change in pull request #223: [NEMO-388] Off-heap memory management (reuse ByteBuffer)
Date Tue, 23 Jul 2019 07:29:37 GMT
johnyangk commented on a change in pull request #223: [NEMO-388] Off-heap memory management
(reuse ByteBuffer)
URL: https://github.com/apache/incubator-nemo/pull/223#discussion_r306163792
 
 

 ##########
 File path: runtime/executor/src/main/java/org/apache/nemo/runtime/executor/data/MemoryChunk.java
 ##########
 @@ -0,0 +1,811 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.nemo.runtime.executor.data;
+
+import java.lang.reflect.Field;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+
+/**
+ * This class represents chunk of memory residing in off-heap region
+ * managed by {@link MemoryPoolAssigner}, which is backed by {@link ByteBuffer}.
+ */
+public class MemoryChunk {
+
+  @SuppressWarnings("restriction")
+  protected static final sun.misc.Unsafe UNSAFE = getUnsafe();
 
 Review comment:
   Briefly comment on why UNSAFE is needed?

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

Mime
View raw message