Jordan Halterman | 29718e6 | 2017-07-20 13:24:33 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.primitiveperf; |
| 17 | |
| 18 | import java.util.ArrayList; |
| 19 | import java.util.Arrays; |
| 20 | import java.util.HashMap; |
| 21 | import java.util.LinkedList; |
| 22 | import java.util.List; |
| 23 | import java.util.Map; |
| 24 | |
| 25 | import com.google.common.collect.ImmutableList; |
| 26 | import org.apache.felix.scr.annotations.Activate; |
| 27 | import org.apache.felix.scr.annotations.Component; |
| 28 | import org.apache.felix.scr.annotations.Deactivate; |
| 29 | import org.apache.felix.scr.annotations.Reference; |
| 30 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 31 | import org.apache.felix.scr.annotations.Service; |
| 32 | import org.onosproject.cluster.ClusterService; |
| 33 | import org.onosproject.cluster.ControllerNode; |
| 34 | import org.onosproject.cluster.NodeId; |
| 35 | import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
| 36 | import org.onosproject.store.cluster.messaging.ClusterMessage; |
| 37 | import org.onosproject.store.cluster.messaging.ClusterMessageHandler; |
| 38 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 39 | import org.slf4j.Logger; |
| 40 | |
| 41 | import static org.onlab.util.SharedExecutors.getPoolThreadExecutor; |
| 42 | import static org.slf4j.LoggerFactory.getLogger; |
| 43 | |
| 44 | /** |
| 45 | * Collects and distributes performance samples. |
| 46 | */ |
| 47 | @Component(immediate = true) |
| 48 | @Service(value = PrimitivePerfCollector.class) |
| 49 | public class PrimitivePerfCollector { |
| 50 | |
| 51 | private static final long SAMPLE_TIME_WINDOW_MS = 5_000; |
| 52 | private final Logger log = getLogger(getClass()); |
| 53 | |
| 54 | private static final int MAX_SAMPLES = 1_000; |
| 55 | |
| 56 | private final List<Sample> samples = new LinkedList<>(); |
| 57 | |
| 58 | private static final MessageSubject SAMPLE = new MessageSubject("primitive-perf-sample"); |
| 59 | |
| 60 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 61 | protected ClusterCommunicationService communicationService; |
| 62 | |
| 63 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 64 | protected ClusterService clusterService; |
| 65 | |
| 66 | // Auxiliary structures used to accrue data for normalized time interval |
| 67 | // across all nodes. |
| 68 | private long newestTime; |
| 69 | private Sample overall; |
| 70 | private Sample current; |
| 71 | |
| 72 | private ControllerNode[] nodes; |
| 73 | private Map<NodeId, Integer> nodeToIndex; |
| 74 | |
| 75 | private NodeId nodeId; |
| 76 | |
| 77 | @Activate |
| 78 | public void activate() { |
| 79 | nodeId = clusterService.getLocalNode().id(); |
| 80 | |
| 81 | communicationService.addSubscriber(SAMPLE, new InternalSampleCollector(), |
| 82 | getPoolThreadExecutor()); |
| 83 | |
| 84 | nodes = clusterService.getNodes().toArray(new ControllerNode[]{}); |
| 85 | Arrays.sort(nodes, (a, b) -> a.id().toString().compareTo(b.id().toString())); |
| 86 | |
| 87 | nodeToIndex = new HashMap<>(); |
| 88 | for (int i = 0; i < nodes.length; i++) { |
| 89 | nodeToIndex.put(nodes[i].id(), i); |
| 90 | } |
| 91 | |
| 92 | clearSamples(); |
| 93 | log.info("Started"); |
| 94 | } |
| 95 | |
| 96 | @Deactivate |
| 97 | public void deactivate() { |
| 98 | communicationService.removeSubscriber(SAMPLE); |
| 99 | log.info("Stopped"); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Clears all previously accumulated data. |
| 104 | */ |
| 105 | public synchronized void clearSamples() { |
| 106 | newestTime = 0; |
| 107 | overall = new Sample(0, nodes.length); |
| 108 | current = new Sample(0, nodes.length); |
| 109 | samples.clear(); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | /** |
| 114 | * Records a sample point of data about primitive operation rate. |
| 115 | * |
| 116 | * @param overallRate overall rate |
| 117 | * @param currentRate current rate |
| 118 | */ |
| 119 | public void recordSample(double overallRate, double currentRate) { |
| 120 | long now = System.currentTimeMillis(); |
| 121 | addSample(now, nodeId, overallRate, currentRate); |
| 122 | broadcastSample(now, nodeId, overallRate, currentRate); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Returns set of node ids as headers. |
| 127 | * |
| 128 | * @return node id headers |
| 129 | */ |
| 130 | public List<String> getSampleHeaders() { |
| 131 | List<String> headers = new ArrayList<>(); |
| 132 | for (ControllerNode node : nodes) { |
| 133 | headers.add(node.id().toString()); |
| 134 | } |
| 135 | return headers; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Returns set of all accumulated samples normalized to the local set of |
| 140 | * samples. |
| 141 | * |
| 142 | * @return accumulated samples |
| 143 | */ |
| 144 | public synchronized List<Sample> getSamples() { |
| 145 | return ImmutableList.copyOf(samples); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Returns overall throughput performance for each of the cluster nodes. |
| 150 | * |
| 151 | * @return overall primitive throughput |
| 152 | */ |
| 153 | public synchronized Sample getOverall() { |
| 154 | return overall; |
| 155 | } |
| 156 | |
| 157 | // Records a new sample to our collection of samples |
| 158 | private synchronized void addSample(long time, NodeId nodeId, |
| 159 | double overallRate, double currentRate) { |
| 160 | Sample fullSample = createCurrentSampleIfNeeded(time); |
| 161 | setSampleData(current, nodeId, currentRate); |
| 162 | setSampleData(overall, nodeId, overallRate); |
| 163 | pruneSamplesIfNeeded(); |
| 164 | } |
| 165 | |
| 166 | private Sample createCurrentSampleIfNeeded(long time) { |
| 167 | Sample oldSample = time - newestTime > SAMPLE_TIME_WINDOW_MS || current.isComplete() ? current : null; |
| 168 | if (oldSample != null) { |
| 169 | newestTime = time; |
| 170 | current = new Sample(time, nodes.length); |
| 171 | if (oldSample.time > 0) { |
| 172 | samples.add(oldSample); |
| 173 | } |
| 174 | } |
| 175 | return oldSample; |
| 176 | } |
| 177 | |
| 178 | private void setSampleData(Sample sample, NodeId nodeId, double data) { |
| 179 | Integer index = nodeToIndex.get(nodeId); |
| 180 | if (index != null) { |
| 181 | sample.data[index] = data; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | private void pruneSamplesIfNeeded() { |
| 186 | if (samples.size() > MAX_SAMPLES) { |
| 187 | samples.remove(0); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | // Performance data sample. |
| 192 | static class Sample { |
| 193 | final long time; |
| 194 | final double[] data; |
| 195 | |
| 196 | public Sample(long time, int nodeCount) { |
| 197 | this.time = time; |
| 198 | this.data = new double[nodeCount]; |
| 199 | Arrays.fill(data, -1); |
| 200 | } |
| 201 | |
| 202 | public boolean isComplete() { |
| 203 | for (int i = 0; i < data.length; i++) { |
| 204 | if (data[i] < 0) { |
| 205 | return false; |
| 206 | } |
| 207 | } |
| 208 | return true; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | private void broadcastSample(long time, NodeId nodeId, double overallRate, double currentRate) { |
| 213 | String data = String.format("%d|%f|%f", time, overallRate, currentRate); |
| 214 | communicationService.broadcast(data, SAMPLE, str -> str.getBytes()); |
| 215 | } |
| 216 | |
| 217 | private class InternalSampleCollector implements ClusterMessageHandler { |
| 218 | @Override |
| 219 | public void handle(ClusterMessage message) { |
| 220 | String[] fields = new String(message.payload()).split("\\|"); |
| 221 | log.debug("Received sample from {}: {}", message.sender(), fields); |
| 222 | addSample(Long.parseLong(fields[0]), message.sender(), |
| 223 | Double.parseDouble(fields[1]), Double.parseDouble(fields[2])); |
| 224 | } |
| 225 | } |
| 226 | } |