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src/share/vm/utilities/histogram.hpp@24b9c7f4cae6 (annotated)
src/share/vm/utilities/histogram.hpp
Mon, 02 Jul 2012 13:11:28 -0400
- author
- coleenp
- date
- Mon, 02 Jul 2012 13:11:28 -0400
- changeset 3901
- 24b9c7f4cae6
- parent 3900
- d2a62e0f25eb
- child 4153
- b9a9ed0f8eeb
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- -rw-r--r--
Merge
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_UTILITIES_HISTOGRAM_HPP |
| stefank@2314 | 26 | #define SHARE_VM_UTILITIES_HISTOGRAM_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "memory/allocation.hpp" |
| stefank@2314 | 29 | #include "runtime/os.hpp" |
| stefank@2314 | 30 | #include "utilities/growableArray.hpp" |
| stefank@2314 | 31 | #ifdef TARGET_OS_FAMILY_linux |
| stefank@2314 | 32 | # include "os_linux.inline.hpp" |
| stefank@2314 | 33 | #endif |
| stefank@2314 | 34 | #ifdef TARGET_OS_FAMILY_solaris |
| stefank@2314 | 35 | # include "os_solaris.inline.hpp" |
| stefank@2314 | 36 | #endif |
| stefank@2314 | 37 | #ifdef TARGET_OS_FAMILY_windows |
| stefank@2314 | 38 | # include "os_windows.inline.hpp" |
| stefank@2314 | 39 | #endif |
| never@3156 | 40 | #ifdef TARGET_OS_FAMILY_bsd |
| never@3156 | 41 | # include "os_bsd.inline.hpp" |
| never@3156 | 42 | #endif |
| stefank@2314 | 43 | |
| duke@435 | 44 | // This class provides a framework for collecting various statistics. |
| duke@435 | 45 | // The current implementation is oriented towards counting invocations |
| duke@435 | 46 | // of various types, but that can be easily changed. |
| duke@435 | 47 | // |
| duke@435 | 48 | // To use it, you need to declare a Histogram*, and a subtype of |
| duke@435 | 49 | // HistogramElement: |
| duke@435 | 50 | // |
| duke@435 | 51 | // HistogramElement* MyHistogram; |
| duke@435 | 52 | // |
| duke@435 | 53 | // class MyHistogramElement : public HistogramElement { |
| duke@435 | 54 | // public: |
| duke@435 | 55 | // MyHistogramElement(char* name); |
| duke@435 | 56 | // }; |
| duke@435 | 57 | // |
| duke@435 | 58 | // MyHistogramElement::MyHistogramElement(char* elementName) { |
| duke@435 | 59 | // _name = elementName; |
| duke@435 | 60 | // |
| duke@435 | 61 | // if(MyHistogram == NULL) |
| duke@435 | 62 | // MyHistogram = new Histogram("My Call Counts",100); |
| duke@435 | 63 | // |
| duke@435 | 64 | // MyHistogram->add_element(this); |
| duke@435 | 65 | // } |
| duke@435 | 66 | // |
| duke@435 | 67 | // #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count() |
| duke@435 | 68 | // |
| duke@435 | 69 | // This gives you a simple way to count invocations of specfic functions: |
| duke@435 | 70 | // |
| duke@435 | 71 | // void a_function_that_is_being_counted() { |
| duke@435 | 72 | // MyCountWrapper("FunctionName"); |
| duke@435 | 73 | // ... |
| duke@435 | 74 | // } |
| duke@435 | 75 | // |
| duke@435 | 76 | // To print the results, invoke print() on your Histogram*. |
| duke@435 | 77 | |
| duke@435 | 78 | #ifdef ASSERT |
| duke@435 | 79 | |
| zgu@3900 | 80 | class HistogramElement : public CHeapObj<mtInternal> { |
| duke@435 | 81 | protected: |
| duke@435 | 82 | jint _count; |
| duke@435 | 83 | const char* _name; |
| duke@435 | 84 | |
| duke@435 | 85 | public: |
| duke@435 | 86 | HistogramElement(); |
| duke@435 | 87 | virtual int count(); |
| duke@435 | 88 | virtual const char* name(); |
| duke@435 | 89 | virtual void increment_count(); |
| duke@435 | 90 | void print_on(outputStream* st) const; |
| duke@435 | 91 | virtual int compare(HistogramElement* e1,HistogramElement* e2); |
| duke@435 | 92 | }; |
| duke@435 | 93 | |
| zgu@3900 | 94 | class Histogram : public CHeapObj<mtInternal> { |
| duke@435 | 95 | protected: |
| duke@435 | 96 | GrowableArray<HistogramElement*>* _elements; |
| duke@435 | 97 | GrowableArray<HistogramElement*>* elements() { return _elements; } |
| duke@435 | 98 | const char* _title; |
| duke@435 | 99 | const char* title() { return _title; } |
| duke@435 | 100 | static int sort_helper(HistogramElement** e1,HistogramElement** e2); |
| duke@435 | 101 | virtual void print_header(outputStream* st); |
| duke@435 | 102 | virtual void print_elements(outputStream* st); |
| duke@435 | 103 | |
| duke@435 | 104 | public: |
| duke@435 | 105 | Histogram(const char* title,int estimatedSize); |
| duke@435 | 106 | virtual void add_element(HistogramElement* element); |
| duke@435 | 107 | void print_on(outputStream* st) const; |
| duke@435 | 108 | }; |
| duke@435 | 109 | |
| duke@435 | 110 | #endif |
| stefank@2314 | 111 | |
| stefank@2314 | 112 | #endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP |
