jdk8-mips64-public/hotspot: src/share/vm/utilities/histogram.cpp@3582bf76420e

6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank

     1 /*

     2  * Copyright (c) 1998, 2010, 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  */

    25 #include "precompiled.hpp"

    26 #include "oops/oop.inline.hpp"

    27 #include "utilities/histogram.hpp"

    29 #ifdef ASSERT

    31 ////////////////// HistogramElement ////////////////////////

    33 HistogramElement::HistogramElement() {

    34   _count = 0;

    35 }

    37 int HistogramElement::count() {

    38   return _count;

    39 }

    41 const char* HistogramElement::name() {

    42   return _name;

    43 }

    45 void HistogramElement::increment_count() {

    46   // We can't use the accessor :-(.

    47   Atomic::inc(&_count);

    48 }

    50 int HistogramElement::compare(HistogramElement* e1,HistogramElement* e2) {

    51   if(e1->count() > e2->count()) {

    52     return -1;

    53   } else if(e1->count() < e2->count()) {

    54     return 1;

    55   }

    56   return 0;

    57 }

    59 void HistogramElement::print_on(outputStream* st) const {

    60   st->print("%10d   ",((HistogramElement*)this)->count());

    61   st->print_cr("%s",((HistogramElement*)this)->name());

    62 }

    64 ////////////////// Histogram ////////////////////////

    66 int Histogram::sort_helper(HistogramElement** e1, HistogramElement** e2) {

    67   return (*e1)->compare(*e1,*e2);

    68 }

    70 Histogram::Histogram(const char* title,int estimatedCount) {

    71   _title = title;

    72   _elements = new (ResourceObj::C_HEAP) GrowableArray<HistogramElement*>(estimatedCount,true);

    73 }

    75 void Histogram::add_element(HistogramElement* element) {

    76   // Note, we need to add locking !

    77   elements()->append(element);

    78 }

    80 void Histogram::print_header(outputStream* st) {

    81   st->print_cr("%s",title());

    82   st->print_cr("--------------------------------------------------");

    83 }

    85 void Histogram::print_elements(outputStream* st) {

    86   elements()->sort(Histogram::sort_helper);

    87   jint total = 0;

    88   for(int i=0; i < elements()->length(); i++) {

    89     elements()->at(i)->print();

    90     total += elements()->at(i)->count();

    91   }

    92   st->print("%10d   ", total);

    93   st->print_cr("Total");

    94 }

    96 void Histogram::print_on(outputStream* st) const {

    97   ((Histogram*)this)->print_header(st);

    98   ((Histogram*)this)->print_elements(st);

    99 }

   101 #endif

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/utilities/histogram.cpp@3582bf76420e

src/share/vm/utilities/histogram.cpp