hotspot/src/share/vm/utilities/histogram.cpp
changeset 1 489c9b5090e2
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0:fd16c54261b3 1:489c9b5090e2
       
     1 /*
       
     2  * Copyright 1998-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
       
    20  * CA 95054 USA or visit www.sun.com if you need additional information or
       
    21  * have any questions.
       
    22  *
       
    23  */
       
    24 
       
    25 # include "incls/_precompiled.incl"
       
    26 # include "incls/_histogram.cpp.incl"
       
    27 
       
    28 #ifdef ASSERT
       
    29 
       
    30 ////////////////// HistogramElement ////////////////////////
       
    31 
       
    32 HistogramElement::HistogramElement() {
       
    33   _count = 0;
       
    34 }
       
    35 
       
    36 int HistogramElement::count() {
       
    37   return _count;
       
    38 }
       
    39 
       
    40 const char* HistogramElement::name() {
       
    41   return _name;
       
    42 }
       
    43 
       
    44 void HistogramElement::increment_count() {
       
    45   // We can't use the accessor :-(.
       
    46   Atomic::inc(&_count);
       
    47 }
       
    48 
       
    49 int HistogramElement::compare(HistogramElement* e1,HistogramElement* e2) {
       
    50   if(e1->count() > e2->count()) {
       
    51     return -1;
       
    52   } else if(e1->count() < e2->count()) {
       
    53     return 1;
       
    54   }
       
    55   return 0;
       
    56 }
       
    57 
       
    58 void HistogramElement::print_on(outputStream* st) const {
       
    59   st->print("%10d   ",((HistogramElement*)this)->count());
       
    60   st->print_cr("%s",((HistogramElement*)this)->name());
       
    61 }
       
    62 
       
    63 ////////////////// Histogram ////////////////////////
       
    64 
       
    65 int Histogram::sort_helper(HistogramElement** e1, HistogramElement** e2) {
       
    66   return (*e1)->compare(*e1,*e2);
       
    67 }
       
    68 
       
    69 Histogram::Histogram(const char* title,int estimatedCount) {
       
    70   _title = title;
       
    71   _elements = new (ResourceObj::C_HEAP) GrowableArray<HistogramElement*>(estimatedCount,true);
       
    72 }
       
    73 
       
    74 void Histogram::add_element(HistogramElement* element) {
       
    75   // Note, we need to add locking !
       
    76   elements()->append(element);
       
    77 }
       
    78 
       
    79 void Histogram::print_header(outputStream* st) {
       
    80   st->print_cr("%s",title());
       
    81   st->print_cr("--------------------------------------------------");
       
    82 }
       
    83 
       
    84 void Histogram::print_elements(outputStream* st) {
       
    85   elements()->sort(Histogram::sort_helper);
       
    86   jint total = 0;
       
    87   for(int i=0; i < elements()->length(); i++) {
       
    88     elements()->at(i)->print();
       
    89     total += elements()->at(i)->count();
       
    90   }
       
    91   st->print("%10d   ", total);
       
    92   st->print_cr("Total");
       
    93 }
       
    94 
       
    95 void Histogram::print_on(outputStream* st) const {
       
    96   ((Histogram*)this)->print_header(st);
       
    97   ((Histogram*)this)->print_elements(st);
       
    98 }
       
    99 
       
   100 #endif