Mercurial > hg > truffle
view src/share/vm/utilities/histogram.hpp @ 4877:c03e06373b47
Merge
author | stefank |
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date | Sat, 28 Jan 2012 01:15:34 -0800 |
parents | f08d439fab8c |
children | d2a62e0f25eb |
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/* * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_UTILITIES_HISTOGRAM_HPP #define SHARE_VM_UTILITIES_HISTOGRAM_HPP #include "memory/allocation.hpp" #include "runtime/os.hpp" #include "utilities/growableArray.hpp" #ifdef TARGET_OS_FAMILY_linux # include "os_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "os_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "os_windows.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_bsd # include "os_bsd.inline.hpp" #endif // This class provides a framework for collecting various statistics. // The current implementation is oriented towards counting invocations // of various types, but that can be easily changed. // // To use it, you need to declare a Histogram*, and a subtype of // HistogramElement: // // HistogramElement* MyHistogram; // // class MyHistogramElement : public HistogramElement { // public: // MyHistogramElement(char* name); // }; // // MyHistogramElement::MyHistogramElement(char* elementName) { // _name = elementName; // // if(MyHistogram == NULL) // MyHistogram = new Histogram("My Call Counts",100); // // MyHistogram->add_element(this); // } // // #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count() // // This gives you a simple way to count invocations of specfic functions: // // void a_function_that_is_being_counted() { // MyCountWrapper("FunctionName"); // ... // } // // To print the results, invoke print() on your Histogram*. #ifdef ASSERT class HistogramElement : public CHeapObj { protected: jint _count; const char* _name; public: HistogramElement(); virtual int count(); virtual const char* name(); virtual void increment_count(); void print_on(outputStream* st) const; virtual int compare(HistogramElement* e1,HistogramElement* e2); }; class Histogram : public CHeapObj { protected: GrowableArray<HistogramElement*>* _elements; GrowableArray<HistogramElement*>* elements() { return _elements; } const char* _title; const char* title() { return _title; } static int sort_helper(HistogramElement** e1,HistogramElement** e2); virtual void print_header(outputStream* st); virtual void print_elements(outputStream* st); public: Histogram(const char* title,int estimatedSize); virtual void add_element(HistogramElement* element); void print_on(outputStream* st) const; }; #endif #endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP