/**
* Copyright (c) 1999-2014, Ecole des Mines de Nantes
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Ecole des Mines de Nantes nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package samples;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;
import util.tools.ArrayUtils;
import java.lang.management.ManagementFactory;
/**
* <br/>
*
* @author Charles Prud'homme
* @since 29/08/11
*/
public abstract class AbstractBenchmarking {
@Option(name = "-loop", usage = "Number of time a sample should be run", required = false)
int loop = 1;
@Option(name = "-warmUp", usage = "JVM warm up loop", required = false)
int warmUp = 0;
@Option(name = "-noJVMclean", usage = "Disable JVM cleaning", required = false)
boolean noJVMcleaning = false;
public final void execute(String... args) {
readArgs(args);
run();
}
public final void readArgs(String... args) {
CmdLineParser parser = new CmdLineParser(this);
parser.setUsageWidth(160);
try {
parser.parseArgument(args);
} catch (CmdLineException e) {
System.err.println(e.getMessage());
System.err.println("java " + this.getClass() + " [options...]");
parser.printUsage(System.err);
System.err.println();
System.exit(-1);
}
}
protected void cleanJVM() {
long memUsedPrev = memoryUsed();
for (int i = 0; i < 100; i++) {
System.runFinalization(); // see also: http://java.sun.com/developer/technicalArticles/javase/finalization/
System.gc();
long memUsedNow = memoryUsed();
if ( // break early if have no more finalization and get constant mem used
(ManagementFactory.getMemoryMXBean().getObjectPendingFinalizationCount() == 0) &&
(memUsedNow >= memUsedPrev)
) {
break;
} else {
memUsedPrev = memUsedNow;
}
}
}
/**
* Returns how much memory on the heap is currently being used.
*/
public static long memoryUsed() {
Runtime rt = Runtime.getRuntime();
return rt.totalMemory() - rt.freeMemory();
}
protected abstract void run();
protected void run(AbstractProblem pb, String[] args) {
if (warmUp > 0) {
System.out.printf("Warm up JVM");
AbstractProblem.Level level = pb.level;
String[] _args = args.clone();
boolean found = false;
for (int i = 0; i < args.length; i++) {
if (_args[i].equals("-l")) {
_args[i + 1] = "SILENT";
found = true;
break;
}
}
if (!found) {
_args = ArrayUtils.append(_args, new String[]{"-l", "SILENT"});
}
for (int i = warmUp; i >= 0; i--) {
pb.execute(_args);
if (!noJVMcleaning) cleanJVM();
System.out.printf(".");
}
pb.level = level; // restore initial level
System.out.printf("OK\n");
}
for (int i = loop - 1; i >= 0; i--) {
pb.execute(args);
if (!noJVMcleaning) cleanJVM();
}
}
}