package org.apache.lucene.benchmark.byTask.tasks;
/**
* 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.
*/
import java.util.ArrayList;
import java.util.Iterator;
import org.apache.lucene.benchmark.byTask.PerfRunData;
/**
* Sequence of parallel or sequential tasks.
*/
public class TaskSequence extends PerfTask {
private ArrayList tasks;
private int repetitions = 1;
private boolean parallel;
private TaskSequence parent;
private boolean letChildReport = true;
private int rate = 0;
private boolean perMin = false; // rate, if set, is, by default, be sec.
private String seqName;
public TaskSequence (PerfRunData runData, String name, TaskSequence parent, boolean parallel) {
super(runData);
name = (name!=null ? name : (parallel ? "Par" : "Seq"));
setName(name);
setSequenceName();
this.parent = parent;
this.parallel = parallel;
tasks = new ArrayList();
}
/**
* @return Returns the parallel.
*/
public boolean isParallel() {
return parallel;
}
/**
* @return Returns the repetitions.
*/
public int getRepetitions() {
return repetitions;
}
/**
* @param repetitions The repetitions to set.
*/
public void setRepetitions(int repetitions) {
this.repetitions = repetitions;
setSequenceName();
}
/**
* @return Returns the parent.
*/
public TaskSequence getParent() {
return parent;
}
/*
* (non-Javadoc)
* @see org.apache.lucene.benchmark.byTask.tasks.PerfTask#doLogic()
*/
public int doLogic() throws Exception {
return ( parallel ? doParallelTasks() : doSerialTasks());
}
private int doSerialTasks() throws Exception {
if (rate > 0) {
return doSerialTasksWithRate();
}
int count = 0;
for (int k=0; k<repetitions; k++) {
for (Iterator it = tasks.iterator(); it.hasNext();) {
PerfTask task = (PerfTask) it.next();
count += task.runAndMaybeStats(letChildReport);
}
}
return count;
}
private int doSerialTasksWithRate() throws Exception {
long delayStep = (perMin ? 60000 : 1000) /rate;
long nextStartTime = System.currentTimeMillis();
int count = 0;
for (int k=0; k<repetitions; k++) {
for (Iterator it = tasks.iterator(); it.hasNext();) {
PerfTask task = (PerfTask) it.next();
long waitMore = nextStartTime - System.currentTimeMillis();
if (waitMore > 0) {
//System.out.println("wait: "+waitMore+" for rate: "+ratePerMin+" (delayStep="+delayStep+")");
Thread.sleep(waitMore);
}
nextStartTime += delayStep; // this aims at avarage rate.
count += task.runAndMaybeStats(letChildReport);
}
}
return count;
}
private int doParallelTasks() throws Exception {
final int count [] = {0};
Thread t[] = new Thread [repetitions * tasks.size()];
// prepare threads
int indx = 0;
for (int k=0; k<repetitions; k++) {
for (int i = 0; i < tasks.size(); i++) {
final PerfTask task = (PerfTask) ((PerfTask) tasks.get(i)).clone();
t[indx++] = new Thread() {
public void run() {
int n;
try {
n = task.runAndMaybeStats(letChildReport);
} catch (Exception e) {
throw new RuntimeException(e);
}
synchronized (count) {
count[0] += n;
}
}
};
}
}
// run threads
startThreads(t);
// wait for all threads to complete
for (int i = 0; i < t.length; i++) {
t[i].join();
}
// return total count
return count[0];
}
// run threads
private void startThreads(Thread[] t) throws InterruptedException {
if (rate > 0) {
startlThreadsWithRate(t);
return;
}
for (int i = 0; i < t.length; i++) {
t[i].start();
}
}
// run threadsm with rate
private void startlThreadsWithRate(Thread[] t) throws InterruptedException {
long delayStep = (perMin ? 60000 : 1000) /rate;
long nextStartTime = System.currentTimeMillis();
for (int i = 0; i < t.length; i++) {
long waitMore = nextStartTime - System.currentTimeMillis();
if (waitMore > 0) {
//System.out.println("thread wait: "+waitMore+" for rate: "+ratePerMin+" (delayStep="+delayStep+")");
Thread.sleep(waitMore);
}
nextStartTime += delayStep; // this aims at avarage rate of starting threads.
t[i].start();
}
}
public void addTask(PerfTask task) {
tasks.add(task);
task.setDepth(getDepth()+1);
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString() {
String padd = getPadding();
StringBuffer sb = new StringBuffer(super.toString());
sb.append(parallel ? " [" : " {");
sb.append(NEW_LINE);
for (Iterator it = tasks.iterator(); it.hasNext();) {
PerfTask task = (PerfTask) it.next();
sb.append(task.toString());
sb.append(NEW_LINE);
}
sb.append(padd);
sb.append(!letChildReport ? ">" : (parallel ? "]" : "}"));
if (repetitions>1) {
sb.append(" * " + repetitions);
}
if (rate>0) {
sb.append(", rate: " + rate+"/"+(perMin?"min":"sec"));
}
return sb.toString();
}
/**
* Execute child tasks in a way that they do not reprt their time separately.
* Current implementation if child tasks has child tasks of their own, those are not affected by this call.
*/
public void setNoChildReport() {
letChildReport = false;
for (Iterator it = tasks.iterator(); it.hasNext();) {
PerfTask task = (PerfTask) it.next();
if (task instanceof TaskSequence) {
((TaskSequence)task).setNoChildReport();
}
}
}
/**
* Returns the rate per minute: how many operations should be performed in a minute.
* If 0 this has no effect.
* @return the rate per min: how many operations should be performed in a minute.
*/
public int getRate() {
return (perMin ? rate : 60*rate);
}
/**
* @param rate The rate to set.
*/
public void setRate(int rate, boolean perMin) {
this.rate = rate;
this.perMin = perMin;
setSequenceName();
}
private void setSequenceName() {
seqName = super.getName();
if (repetitions>1) {
seqName += "_"+repetitions;
}
if (rate>0) {
seqName += "_" + rate + (perMin?"/min":"/sec");
}
if (parallel && seqName.toLowerCase().indexOf("par")<0) {
seqName += "_Par";
}
}
public String getName() {
return seqName; // overide to include more info
}
/**
* @return Returns the tasks.
*/
public ArrayList getTasks() {
return tasks;
}
/* (non-Javadoc)
* @see java.lang.Object#clone()
*/
protected Object clone() throws CloneNotSupportedException {
TaskSequence res = (TaskSequence) super.clone();
res.tasks = new ArrayList();
for (int i = 0; i < tasks.size(); i++) {
res.tasks.add(((PerfTask)tasks.get(i)).clone());
}
return res;
}
}
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