hadoop ProgressSplitsBlock 源码
haddop ProgressSplitsBlock 代码
文件路径:/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/ProgressSplitsBlock.java
/**
* 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.hadoop.mapred;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
/*
* This object gathers the [currently four] PeriodStatset's that we
* are gathering for a particular task attempt for packaging and
* handling as a single object.
*/
@Private
@Unstable
public class ProgressSplitsBlock {
final PeriodicStatsAccumulator progressWallclockTime;
final PeriodicStatsAccumulator progressCPUTime;
final PeriodicStatsAccumulator progressVirtualMemoryKbytes;
final PeriodicStatsAccumulator progressPhysicalMemoryKbytes;
static final int[] NULL_ARRAY = new int[0];
static final int WALLCLOCK_TIME_INDEX = 0;
static final int CPU_TIME_INDEX = 1;
static final int VIRTUAL_MEMORY_KBYTES_INDEX = 2;
static final int PHYSICAL_MEMORY_KBYTES_INDEX = 3;
static final int DEFAULT_NUMBER_PROGRESS_SPLITS = 12;
ProgressSplitsBlock(int numberSplits) {
progressWallclockTime
= new CumulativePeriodicStats(numberSplits);
progressCPUTime
= new CumulativePeriodicStats(numberSplits);
progressVirtualMemoryKbytes
= new StatePeriodicStats(numberSplits);
progressPhysicalMemoryKbytes
= new StatePeriodicStats(numberSplits);
}
// this coordinates with LoggedTaskAttempt.SplitVectorKind
int[][] burst() {
int[][] result = new int[4][];
result[WALLCLOCK_TIME_INDEX] = progressWallclockTime.getValues();
result[CPU_TIME_INDEX] = progressCPUTime.getValues();
result[VIRTUAL_MEMORY_KBYTES_INDEX] = progressVirtualMemoryKbytes.getValues();
result[PHYSICAL_MEMORY_KBYTES_INDEX] = progressPhysicalMemoryKbytes.getValues();
return result;
}
static public int[] arrayGet(int[][] burstedBlock, int index) {
return burstedBlock == null ? NULL_ARRAY : burstedBlock[index];
}
static public int[] arrayGetWallclockTime(int[][] burstedBlock) {
return arrayGet(burstedBlock, WALLCLOCK_TIME_INDEX);
}
static public int[] arrayGetCPUTime(int[][] burstedBlock) {
return arrayGet(burstedBlock, CPU_TIME_INDEX);
}
static public int[] arrayGetVMemKbytes(int[][] burstedBlock) {
return arrayGet(burstedBlock, VIRTUAL_MEMORY_KBYTES_INDEX);
}
static public int[] arrayGetPhysMemKbytes(int[][] burstedBlock) {
return arrayGet(burstedBlock, PHYSICAL_MEMORY_KBYTES_INDEX);
}
}
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