org.apache.flink.runtime.io.network.metrics.OutputBufferPoolUsageGauge Maven / Gradle / Ivy
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* 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.flink.runtime.io.network.metrics;
import org.apache.flink.metrics.Gauge;
import org.apache.flink.runtime.io.network.buffer.BufferPool;
import org.apache.flink.runtime.io.network.partition.ResultPartition;
/**
* Gauge metric measuring the output buffer pool usage gauge for {@link ResultPartition}s.
*/
public class OutputBufferPoolUsageGauge implements Gauge {
private final ResultPartition[] resultPartitions;
public OutputBufferPoolUsageGauge(ResultPartition[] resultPartitions) {
this.resultPartitions = resultPartitions;
}
@Override
public Float getValue() {
int usedBuffers = 0;
int bufferPoolSize = 0;
for (ResultPartition resultPartition : resultPartitions) {
BufferPool bufferPool = resultPartition.getBufferPool();
if (bufferPool != null) {
usedBuffers += bufferPool.bestEffortGetNumOfUsedBuffers();
bufferPoolSize += bufferPool.getNumBuffers();
}
}
if (bufferPoolSize != 0) {
return ((float) usedBuffers) / bufferPoolSize;
} else {
return 0.0f;
}
}
}