/*
* Copyright (C) 2008-2015 by Holger Arndt
*
* This file is part of the Universal Java Matrix Package (UJMP).
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership and licensing.
*
* UJMP is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* UJMP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with UJMP; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
package org.ujmp.core.benchmark;
import java.math.BigDecimal;
import java.net.Inet4Address;
import java.util.Random;
import org.ujmp.core.Matrix;
import org.ujmp.core.doublematrix.DenseDoubleMatrix2D;
import org.ujmp.core.doublematrix.DoubleMatrix2D;
import org.ujmp.core.doublematrix.impl.DefaultDenseDoubleMatrix2D;
import org.ujmp.core.util.GCUtil;
import org.ujmp.core.util.MathUtil;
public abstract class BenchmarkUtil {
public static String getResultDir(BenchmarkConfig config) {
String name = config.getName();
if (name == null) {
return "results/" + getHostName() + "/" + System.getProperty("os.name") + "/Java"
+ System.getProperty("java.version") + "/";
} else {
return "results/" + name + "/";
}
}
public static String getHostName() {
try {
return Inet4Address.getLocalHost().getHostName();
} catch (Exception e) {
return "localhost";
}
}
public static void rand(long benchmarkSeed, int run, int id, DoubleMatrix2D matrix) {
Random random = new Random(benchmarkSeed + (run + 2) * 31 * 31 + (id + 1) * 31);
int rows = (int) matrix.getRowCount();
int cols = (int) matrix.getColumnCount();
for (int r = 0; r < rows; r++) {
for (int c = 0; c < cols; c++) {
matrix.setDouble(random.nextDouble() - 0.5, r, c);
}
}
}
public static void randSymm(long benchmarkSeed, int run, int id, DoubleMatrix2D matrix) {
Random random = new Random(benchmarkSeed + (run + 2) * 31 * 31 + (id + 1) * 31);
int rows = (int) matrix.getRowCount();
int cols = (int) matrix.getColumnCount();
for (int r = 0; r < rows; r++) {
for (int c = 0; c < cols && c <= r; c++) {
double f = random.nextDouble() - 0.5;
matrix.setDouble(f, r, c);
matrix.setDouble(f, c, r);
}
}
}
public static void randPositiveDefinite(long benchmarkSeed, int run, int id, Matrix matrix) {
Random random = new Random(benchmarkSeed + (run + 2) * 31 * 31 + (id + 1) * 31);
DenseDoubleMatrix2D temp = new DefaultDenseDoubleMatrix2D(MathUtil.longToInt(matrix
.getRowCount()), MathUtil.longToInt(matrix.getColumnCount()));
int rows = (int) temp.getRowCount();
int cols = (int) temp.getColumnCount();
for (int r = 0; r < rows; r++) {
for (int c = 0; c < cols; c++) {
temp.setDouble(random.nextDouble(), r, c);
}
}
DenseDoubleMatrix2D result = (DenseDoubleMatrix2D) temp.mtimes(temp.transpose());
for (int r = 0; r < rows; r++) {
for (int c = 0; c < cols; c++) {
matrix.setAsDouble(result.getDouble(r, c), r, c);
}
}
}
public static DoubleMatrix2D createMatrix(Class<? extends Matrix> matrixClass, long... size) {
try {
return (DoubleMatrix2D) matrixClass.getConstructor(long[].class).newInstance(size);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public static DoubleMatrix2D createMatrix(Class<? extends Matrix> matrixClass, Matrix source) {
try {
return (DoubleMatrix2D) matrixClass.getConstructor(Matrix.class).newInstance(source);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public static double difference(Matrix m1, Matrix m2) {
Matrix d = m1.minus(m2);
// return normF(d).doubleValue();
return d.normF();
}
public static BigDecimal normF(Matrix m) {
long rows = m.getRowCount();
long cols = m.getColumnCount();
BigDecimal result = BigDecimal.ZERO;
for (long ro = 0; ro < rows; ro++) {
for (long c = 0; c < cols; c++) {
BigDecimal b = m.getAsBigDecimal(ro, c);
BigDecimal temp = BigDecimal.ZERO;
if (MathUtil.isGreater(result.abs(), b.abs())) {
temp = MathUtil.divide(b, result);
temp = MathUtil.times(result.abs(), MathUtil.sqrt(MathUtil.plus(BigDecimal.ONE,
MathUtil.times(temp, temp))));
} else if (!MathUtil.equals(BigDecimal.ZERO, b)) {
temp = MathUtil.divide(result, b);
temp = MathUtil.times(b.abs(), MathUtil.sqrt(MathUtil.plus(BigDecimal.ONE,
MathUtil.times(temp, temp))));
} else {
temp = BigDecimal.ZERO;
}
result = temp;
}
}
return result;
}
public static void purgeMemory(BenchmarkConfig config) {
if (config.isPurgeMemory()) {
GCUtil.purgeMemory();
} else if (config.isGCMemory()) {
GCUtil.gc();
}
}
}