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 #include "precompiled.hpp" 26 #include "oops/oop.inline.hpp" 27 #include "runtime/atomic.inline.hpp" 28 #include "utilities/histogram.hpp" 29 30 #ifdef ASSERT 31 32 ////////////////// HistogramElement //////////////////////// 33 34 HistogramElement::HistogramElement() { 35 _count = 0; 36 } 37 38 int HistogramElement::count() { 39 return _count; 40 } 41 42 const char* HistogramElement::name() { 43 return _name; 44 } 45 46 void HistogramElement::increment_count() { 47 // We can't use the accessor :-(. 48 Atomic::inc(&_count); 49 } 50 51 int HistogramElement::compare(HistogramElement* e1,HistogramElement* e2) { 52 if(e1->count() > e2->count()) { 53 return -1; 54 } else if(e1->count() < e2->count()) { 55 return 1; 56 } 57 return 0; 58 } 59 60 void HistogramElement::print_on(outputStream* st) const { 61 st->print("%10d ",((HistogramElement*)this)->count()); 62 st->print_cr("%s",((HistogramElement*)this)->name()); 63 } 64 65 ////////////////// Histogram //////////////////////// 66 67 int Histogram::sort_helper(HistogramElement** e1, HistogramElement** e2) { 68 return (*e1)->compare(*e1,*e2); 69 } 70 71 Histogram::Histogram(const char* title,int estimatedCount) { 72 _title = title; 73 _elements = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<HistogramElement*>(estimatedCount,true); 74 } 75 76 void Histogram::add_element(HistogramElement* element) { 77 // Note, we need to add locking ! 78 elements()->append(element); 79 } 80 81 void Histogram::print_header(outputStream* st) { 82 st->print_cr("%s",title()); 83 st->print_cr("--------------------------------------------------"); 84 } 85 86 void Histogram::print_elements(outputStream* st) { 87 elements()->sort(Histogram::sort_helper); 88 jint total = 0; 89 for(int i=0; i < elements()->length(); i++) { 90 elements()->at(i)->print(); 91 total += elements()->at(i)->count(); 92 } 93 st->print("%10d ", total); 94 st->print_cr("Total"); 95 } 96 97 void Histogram::print_on(outputStream* st) const { 98 ((Histogram*)this)->print_header(st); 99 ((Histogram*)this)->print_elements(st); 100 } 101 102 #endif