1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/histogram.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,115 @@
1.4 +/*
1.5 + * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_UTILITIES_HISTOGRAM_HPP
1.29 +#define SHARE_VM_UTILITIES_HISTOGRAM_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "runtime/os.hpp"
1.33 +#include "utilities/growableArray.hpp"
1.34 +#ifdef TARGET_OS_FAMILY_linux
1.35 +# include "os_linux.inline.hpp"
1.36 +#endif
1.37 +#ifdef TARGET_OS_FAMILY_solaris
1.38 +# include "os_solaris.inline.hpp"
1.39 +#endif
1.40 +#ifdef TARGET_OS_FAMILY_windows
1.41 +# include "os_windows.inline.hpp"
1.42 +#endif
1.43 +#ifdef TARGET_OS_FAMILY_aix
1.44 +# include "os_aix.inline.hpp"
1.45 +#endif
1.46 +#ifdef TARGET_OS_FAMILY_bsd
1.47 +# include "os_bsd.inline.hpp"
1.48 +#endif
1.49 +
1.50 +// This class provides a framework for collecting various statistics.
1.51 +// The current implementation is oriented towards counting invocations
1.52 +// of various types, but that can be easily changed.
1.53 +//
1.54 +// To use it, you need to declare a Histogram*, and a subtype of
1.55 +// HistogramElement:
1.56 +//
1.57 +// HistogramElement* MyHistogram;
1.58 +//
1.59 +// class MyHistogramElement : public HistogramElement {
1.60 +// public:
1.61 +// MyHistogramElement(char* name);
1.62 +// };
1.63 +//
1.64 +// MyHistogramElement::MyHistogramElement(char* elementName) {
1.65 +// _name = elementName;
1.66 +//
1.67 +// if(MyHistogram == NULL)
1.68 +// MyHistogram = new Histogram("My Call Counts",100);
1.69 +//
1.70 +// MyHistogram->add_element(this);
1.71 +// }
1.72 +//
1.73 +// #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count()
1.74 +//
1.75 +// This gives you a simple way to count invocations of specfic functions:
1.76 +//
1.77 +// void a_function_that_is_being_counted() {
1.78 +// MyCountWrapper("FunctionName");
1.79 +// ...
1.80 +// }
1.81 +//
1.82 +// To print the results, invoke print() on your Histogram*.
1.83 +
1.84 +#ifdef ASSERT
1.85 +
1.86 +class HistogramElement : public CHeapObj<mtInternal> {
1.87 + protected:
1.88 + jint _count;
1.89 + const char* _name;
1.90 +
1.91 + public:
1.92 + HistogramElement();
1.93 + virtual int count();
1.94 + virtual const char* name();
1.95 + virtual void increment_count();
1.96 + void print_on(outputStream* st) const;
1.97 + virtual int compare(HistogramElement* e1,HistogramElement* e2);
1.98 +};
1.99 +
1.100 +class Histogram : public CHeapObj<mtInternal> {
1.101 + protected:
1.102 + GrowableArray<HistogramElement*>* _elements;
1.103 + GrowableArray<HistogramElement*>* elements() { return _elements; }
1.104 + const char* _title;
1.105 + const char* title() { return _title; }
1.106 + static int sort_helper(HistogramElement** e1,HistogramElement** e2);
1.107 + virtual void print_header(outputStream* st);
1.108 + virtual void print_elements(outputStream* st);
1.109 +
1.110 + public:
1.111 + Histogram(const char* title,int estimatedSize);
1.112 + virtual void add_element(HistogramElement* element);
1.113 + void print_on(outputStream* st) const;
1.114 +};
1.115 +
1.116 +#endif
1.117 +
1.118 +#endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP
