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comparison: src/share/vm/utilities/histogram.hpp
src/share/vm/utilities/histogram.hpp
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| 1 /* | |
| 2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_UTILITIES_HISTOGRAM_HPP | |
| 26 #define SHARE_VM_UTILITIES_HISTOGRAM_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "runtime/os.hpp" | |
| 30 #include "utilities/growableArray.hpp" | |
| 31 #ifdef TARGET_OS_FAMILY_linux | |
| 32 # include "os_linux.inline.hpp" | |
| 33 #endif | |
| 34 #ifdef TARGET_OS_FAMILY_solaris | |
| 35 # include "os_solaris.inline.hpp" | |
| 36 #endif | |
| 37 #ifdef TARGET_OS_FAMILY_windows | |
| 38 # include "os_windows.inline.hpp" | |
| 39 #endif | |
| 40 #ifdef TARGET_OS_FAMILY_aix | |
| 41 # include "os_aix.inline.hpp" | |
| 42 #endif | |
| 43 #ifdef TARGET_OS_FAMILY_bsd | |
| 44 # include "os_bsd.inline.hpp" | |
| 45 #endif | |
| 46 | |
| 47 // This class provides a framework for collecting various statistics. | |
| 48 // The current implementation is oriented towards counting invocations | |
| 49 // of various types, but that can be easily changed. | |
| 50 // | |
| 51 // To use it, you need to declare a Histogram*, and a subtype of | |
| 52 // HistogramElement: | |
| 53 // | |
| 54 // HistogramElement* MyHistogram; | |
| 55 // | |
| 56 // class MyHistogramElement : public HistogramElement { | |
| 57 // public: | |
| 58 // MyHistogramElement(char* name); | |
| 59 // }; | |
| 60 // | |
| 61 // MyHistogramElement::MyHistogramElement(char* elementName) { | |
| 62 // _name = elementName; | |
| 63 // | |
| 64 // if(MyHistogram == NULL) | |
| 65 // MyHistogram = new Histogram("My Call Counts",100); | |
| 66 // | |
| 67 // MyHistogram->add_element(this); | |
| 68 // } | |
| 69 // | |
| 70 // #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count() | |
| 71 // | |
| 72 // This gives you a simple way to count invocations of specfic functions: | |
| 73 // | |
| 74 // void a_function_that_is_being_counted() { | |
| 75 // MyCountWrapper("FunctionName"); | |
| 76 // ... | |
| 77 // } | |
| 78 // | |
| 79 // To print the results, invoke print() on your Histogram*. | |
| 80 | |
| 81 #ifdef ASSERT | |
| 82 | |
| 83 class HistogramElement : public CHeapObj<mtInternal> { | |
| 84 protected: | |
| 85 jint _count; | |
| 86 const char* _name; | |
| 87 | |
| 88 public: | |
| 89 HistogramElement(); | |
| 90 virtual int count(); | |
| 91 virtual const char* name(); | |
| 92 virtual void increment_count(); | |
| 93 void print_on(outputStream* st) const; | |
| 94 virtual int compare(HistogramElement* e1,HistogramElement* e2); | |
| 95 }; | |
| 96 | |
| 97 class Histogram : public CHeapObj<mtInternal> { | |
| 98 protected: | |
| 99 GrowableArray<HistogramElement*>* _elements; | |
| 100 GrowableArray<HistogramElement*>* elements() { return _elements; } | |
| 101 const char* _title; | |
| 102 const char* title() { return _title; } | |
| 103 static int sort_helper(HistogramElement** e1,HistogramElement** e2); | |
| 104 virtual void print_header(outputStream* st); | |
| 105 virtual void print_elements(outputStream* st); | |
| 106 | |
| 107 public: | |
| 108 Histogram(const char* title,int estimatedSize); | |
| 109 virtual void add_element(HistogramElement* element); | |
| 110 void print_on(outputStream* st) const; | |
| 111 }; | |
| 112 | |
| 113 #endif | |
| 114 | |
| 115 #endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP |
