Tue, 14 Jul 2009 15:40:39 -0700
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
ysr@777 | 1 | /* |
ysr@777 | 2 | * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. |
ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
ysr@777 | 4 | * |
ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ysr@777 | 7 | * published by the Free Software Foundation. |
ysr@777 | 8 | * |
ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
ysr@777 | 13 | * accompanied this code). |
ysr@777 | 14 | * |
ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
ysr@777 | 18 | * |
ysr@777 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
ysr@777 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
ysr@777 | 21 | * have any questions. |
ysr@777 | 22 | * |
ysr@777 | 23 | */ |
ysr@777 | 24 | |
ysr@777 | 25 | # include "incls/_precompiled.incl" |
ysr@777 | 26 | # include "incls/_intHisto.cpp.incl" |
ysr@777 | 27 | |
ysr@777 | 28 | IntHistogram::IntHistogram(int est, int max) : _max(max), _tot(0) { |
ysr@777 | 29 | assert(0 <= est && est <= max, "Preconditions"); |
ysr@777 | 30 | _elements = new (ResourceObj::C_HEAP) GrowableArray<int>(est, true); |
ysr@777 | 31 | guarantee(_elements != NULL, "alloc failure"); |
ysr@777 | 32 | } |
ysr@777 | 33 | |
ysr@777 | 34 | void IntHistogram::add_entry(int outcome) { |
ysr@777 | 35 | if (outcome > _max) outcome = _max; |
ysr@777 | 36 | int new_count = _elements->at_grow(outcome) + 1; |
ysr@777 | 37 | _elements->at_put(outcome, new_count); |
ysr@777 | 38 | _tot++; |
ysr@777 | 39 | } |
ysr@777 | 40 | |
ysr@777 | 41 | int IntHistogram::entries_for_outcome(int outcome) { |
ysr@777 | 42 | return _elements->at_grow(outcome); |
ysr@777 | 43 | } |
ysr@777 | 44 | |
ysr@777 | 45 | void IntHistogram::print_on(outputStream* st) const { |
ysr@777 | 46 | double tot_d = (double)_tot; |
ysr@777 | 47 | st->print_cr("Outcome # of occurrences %% of occurrences"); |
ysr@777 | 48 | st->print_cr("-----------------------------------------------"); |
ysr@777 | 49 | for (int i=0; i < _elements->length()-2; i++) { |
ysr@777 | 50 | int cnt = _elements->at(i); |
ysr@777 | 51 | if (cnt != 0) { |
ysr@777 | 52 | st->print_cr("%7d %10d %8.4f", |
ysr@777 | 53 | i, cnt, (double)cnt/tot_d); |
ysr@777 | 54 | } |
ysr@777 | 55 | } |
ysr@777 | 56 | // Does it have any max entries? |
ysr@777 | 57 | if (_elements->length()-1 == _max) { |
ysr@777 | 58 | int cnt = _elements->at(_max); |
ysr@777 | 59 | st->print_cr(">= %4d %10d %8.4f", |
ysr@777 | 60 | _max, cnt, (double)cnt/tot_d); |
ysr@777 | 61 | } |
ysr@777 | 62 | st->print_cr("-----------------------------------------------"); |
ysr@777 | 63 | st->print_cr(" All %10d %8.4f", _tot, 1.0); |
ysr@777 | 64 | } |