| /* |
| * This file is part of the Jikes RVM project (http://jikesrvm.org). |
| * |
| * This file is licensed to You under the Eclipse Public License (EPL); |
| * You may not use this file except in compliance with the License. You |
| * may obtain a copy of the License at |
| * |
| * http://www.opensource.org/licenses/eclipse-1.0.php |
| * |
| * See the COPYRIGHT.txt file distributed with this work for information |
| * regarding copyright ownership. |
| */ |
| package org.mmtk.utility.statistics; |
| |
| import org.vmmagic.pragma.*; |
| |
| /** |
| * This class implements a simple counter of events of different sizes |
| * (eg object allocations, where total number of objects and total |
| * volume of objects would be counted). |
| * |
| * The counter is trivially composed from two event counters (one for |
| * counting the number of events, the other for counting the volume). |
| */ |
| @Uninterruptible public class SizeCounter { |
| |
| /**************************************************************************** |
| * |
| * Instance variables |
| */ |
| private EventCounter units; |
| private EventCounter volume; |
| |
| /**************************************************************************** |
| * |
| * Initialization |
| */ |
| |
| /** |
| * Constructor |
| * |
| * @param name The name to be associated with this counter |
| */ |
| public SizeCounter(String name) { |
| this(name, true, false); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param name The name to be associated with this counter |
| * @param start True if this counter is to be implicitly started |
| * when <code>startAll()</code> is called (otherwise the counter |
| * must be explicitly started). |
| */ |
| public SizeCounter(String name, boolean start) { |
| this(name, start, false); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param name The name to be associated with this counter |
| * @param start True if this counter is to be implicitly started |
| * when <code>startAll()</code> is called (otherwise the counter |
| * must be explicitly started). |
| * @param mergephases True if this counter does not separately |
| * report GC and Mutator phases. |
| */ |
| public SizeCounter(String name, boolean start, boolean mergephases) { |
| units = new EventCounter(name, start, mergephases); |
| volume = new EventCounter(name + "Volume", start, mergephases); |
| } |
| |
| /**************************************************************************** |
| * |
| * Counter-specific methods |
| */ |
| |
| /** |
| * Increment the event counter by <code>value</code> |
| * |
| * @param value The amount by which the counter should be incremented. |
| */ |
| public void inc(int value) { |
| units.inc(); |
| volume.inc(value); |
| } |
| |
| /**************************************************************************** |
| * |
| * Generic counter control methods: start, stop, print etc |
| */ |
| |
| /** |
| * Start this counter |
| */ |
| public void start() { |
| units.start(); |
| volume.start(); |
| } |
| |
| /** |
| * Stop this counter |
| */ |
| public void stop() { |
| units.stop(); |
| volume.stop(); |
| } |
| |
| /** |
| * Print current (mid-phase) units |
| */ |
| public void printCurrentUnits() { |
| units.printCurrent(); |
| } |
| |
| /** |
| * Print (mid-phase) volume |
| */ |
| public void printCurrentVolume() { |
| volume.printCurrent(); |
| } |
| |
| /** |
| * Print units |
| */ |
| public void printUnits() { |
| units.printTotal(); |
| } |
| |
| /** |
| * Print volume |
| */ |
| public void printVolume() { |
| volume.printTotal(); |
| } |
| } |