/*
* Copyright (C) 2011-2015, Peter Abeles. All Rights Reserved.
*
* This file is part of Geometric Regression Library (GeoRegression).
*
* Licensed 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 georegression;
/**
* @author Peter Abeles
*/
public class ProfileOperation {
/**
* See how long it takes to run the process 'num' times and print the results
* to standard out
*
*/
public static void profile( Performer performer , int num ) {
long deltaTime = measureTime(performer,num);
System.out.printf("%30s time = %8d ms per frame = %8.3f\n",
performer.getName(),deltaTime,(deltaTime/(double)num));
// System.out.println(performer.getClass().getSimpleName()+
// " time = "+deltaTime+" ms per frame "+(deltaTime/(double)num));
}
public static void printOpsPerSec( Performer performer , long minTestTime )
{
try {
double opsPerSecond = profileOpsPerSec(performer,minTestTime, false);
String name = performer.getName() == null ? performer.getClass().getSimpleName() : performer.getName();
System.out.printf("%30s ops/sec = %7.3f\n",name,opsPerSecond);
} catch( RuntimeException e ) {
e.printStackTrace();
System.out.printf("%30s FAILED\n",performer.getClass().getSimpleName());
}
}
public static double profileOpsPerSec(Performer performer, long minTestTime, boolean warmUp)
{
if( warmUp )
performer.process();
int N = 1;
long elapsedTime;
while( true ) {
elapsedTime = measureTime(performer,N);
if(elapsedTime >= minTestTime)
break;
N = N*2;
}
return (double)N/(elapsedTime/1000.0);
}
public static long measureTime( Performer performer , int num )
{
long startTime = System.nanoTime();
for( int i = 0; i < num; i++ ) {
performer.process();
}
long stopTime = System.nanoTime();
return (stopTime-startTime)/1000000L;
}
}