/*
* 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.ignite.spi.loadbalancing.roundrobin;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Callable;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.ignite.GridTestJob;
import org.apache.ignite.GridTestTaskSession;
import org.apache.ignite.cluster.ClusterNode;
import org.apache.ignite.compute.ComputeTaskSession;
import org.apache.ignite.lang.IgniteUuid;
import org.apache.ignite.testframework.GridSpiTestContext;
import org.apache.ignite.testframework.GridTestUtils;
import org.apache.ignite.testframework.junits.spi.GridSpiAbstractTest;
import org.apache.ignite.testframework.junits.spi.GridSpiTest;
import org.apache.ignite.testframework.junits.spi.GridSpiTestConfig;
/**
* Multithreaded tests for global load balancer.
*/
@GridSpiTest(spi = RoundRobinLoadBalancingSpi.class, group = "Load Balancing SPI")
public class GridRoundRobinLoadBalancingNotPerTaskMultithreadedSelfTest
extends GridSpiAbstractTest<RoundRobinLoadBalancingSpi> {
/** Thread count. */
public static final int THREAD_CNT = 8;
/** Per-thread iteration count. */
public static final int ITER_CNT = 4_000_000;
/**
* @return Per-task configuration parameter.
*/
@GridSpiTestConfig
public boolean getPerTask() {
return false;
}
/** {@inheritDoc} */
@Override protected GridSpiTestContext initSpiContext() throws Exception {
GridSpiTestContext spiCtx = super.initSpiContext();
spiCtx.createLocalNode();
spiCtx.createRemoteNodes(10);
return spiCtx;
}
/** {@inheritDoc} */
@Override protected void beforeTest() throws Exception {
assert !getSpi().isPerTask() : "Invalid SPI configuration.";
}
/**
*
* @throws Exception If failed.
*/
public void testMultipleTaskSessionsMultithreaded() throws Exception {
final RoundRobinLoadBalancingSpi spi = getSpi();
final List<ClusterNode> allNodes = (List<ClusterNode>)getSpiContext().nodes();
GridTestUtils.runMultiThreaded(new Callable<Object>() {
@Override public Object call() throws Exception {
ComputeTaskSession ses = new GridTestTaskSession(IgniteUuid.randomUuid());
Map<UUID, AtomicInteger> nodeCnts = new HashMap<>();
for (int i = 1; i <= ITER_CNT; i++) {
ClusterNode node = spi.getBalancedNode(ses, allNodes, new GridTestJob());
if (!nodeCnts.containsKey(node.id()))
nodeCnts.put(node.id(), new AtomicInteger(1));
else
nodeCnts.get(node.id()).incrementAndGet();
}
int predictCnt = ITER_CNT / allNodes.size();
// Consider +-20% is permissible spread for single node measure.
int floor = (int)(predictCnt * 0.8);
double avgSpread = 0;
for (ClusterNode n : allNodes) {
int curCnt = nodeCnts.get(n.id()).intValue();
avgSpread += Math.abs(predictCnt - curCnt);
String msg = "Node stats [id=" + n.id() + ", cnt=" + curCnt + ", floor=" + floor +
", predictCnt=" + predictCnt + ']';
info(msg);
assertTrue(msg, curCnt >= floor);
}
avgSpread /= allNodes.size();
avgSpread = 100.0 * avgSpread / predictCnt;
info("Average spread for " + allNodes.size() + " nodes is " + avgSpread + " percents");
// Consider +-10% is permissible average spread for all nodes.
assertTrue("Average spread is too big: " + avgSpread, avgSpread <= 10);
return null;
}
}, THREAD_CNT, "balancer-test-worker");
}
}