| /******************************************************************************* |
| * Copyright (c) 2004-2010, Andras Schmidt, Andras Balogh, Istvan Rath and Daniel Varro |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Istvan Rath - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.viatra2.natives;
|
|
|
| import org.eclipse.viatra2.core.IModelSpace; |
| import org.eclipse.viatra2.errors.VPMRuntimeException; |
| import org.eclipse.viatra2.natives.NativeFunctionParameter.ParameterType; |
|
|
| /**
|
| * Native function to provide a way for estimating the memory footprint of Viatra2.
|
| * The actual metric used is the heap size.
|
| * Several garbage collection runs (the amount is configurable) are initiated before measurement, which may have a severe runtime impact.
|
| *
|
| * @author Istvan Rath
|
| *
|
| */
|
| @VIATRANativeFunction(name = "measureMemoryFootprint", returns = ParameterType.INTEGER, remark = "Returns the heaps size measured after Garbage Collection. "
|
| + "Caution: Garbage Collector runs are initiated before measurement, which may have a severe runtime impact.",
|
| params = @NativeFunctionParameter(name = "gcRuns",
|
| description = "The number of GC runs to be initiated before measurement.",
|
| type = { NativeFunctionParameter.ParameterType.INTEGER }))
|
| public class MeasureMemoryFootprintFunction implements ASMNativeFunction {
|
|
|
|
|
| public Object evaluate(IModelSpace msp, Object[] params)
|
| throws VPMRuntimeException {
|
| if (params.length != 1) throw new VPMRuntimeException("Illegal parameter number for measureMemoryFootprint(): a single parameter is required");
|
| if (! (params[0] instanceof Integer)) throw new VPMRuntimeException("Illegal argument type for measureMemoryFootprint(): Integer is required");
|
| Integer gcRuns = (Integer) params[0];
|
| for (int i = 0; i<gcRuns; ++i) Runtime.getRuntime().gc();
|
|
|
| return (int)((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory())/(1024*1024));
|
| }
|
|
|
| public String getDescription() {
|
| return "Returns the heaps size measured after Garbage Collection. "
|
| + "Caution: Garbage Collector runs are initiated before measurement, which may have a severe runtime impact.";
|
| }
|
|
|
| public String getID() {
|
| return this.getClass().getCanonicalName();
|
| }
|
|
|
| public String getName() {
|
| return "measureMemoryFootprint";
|
| }
|
|
|
| }
|
