hotspot/src/share/vm/memory/specialized_oop_closures.cpp
author ysr
Thu, 03 Dec 2009 15:01:57 -0800
changeset 4461 c17c526d36ef
parent 1 489c9b5090e2
child 5547 f4b087cbb361
permissions -rw-r--r--
6906727: UseCompressedOops: some card-marking fixes related to object arrays Summary: Introduced a new write_ref_array(HeapWords* start, size_t count) method that does the requisite MemRegion range calculation so (some of the) clients of the erstwhile write_ref_array(MemRegion mr) do not need to worry. This removed all external uses of array_size(), which was also simplified and made private. Asserts were added to catch other possible issues. Further, less essential, fixes stemming from this investigation are deferred to CR 6904516 (to follow shortly in hs17). Reviewed-by: kvn, coleenp, jmasa
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/*
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 * Copyright 2001-2003 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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# include "incls/_precompiled.incl"
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# include "incls/_specialized_oop_closures.cpp.incl"
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// For keeping stats on effectiveness.
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#ifndef PRODUCT
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#if ENABLE_SPECIALIZATION_STATS
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int SpecializationStats::_numCallsAll;
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int SpecializationStats::_numCallsTotal[NUM_Kinds];
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int SpecializationStats::_numCalls_nv[NUM_Kinds];
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int SpecializationStats::_numDoOopCallsTotal[NUM_Kinds];
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int SpecializationStats::_numDoOopCalls_nv[NUM_Kinds];
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void SpecializationStats::clear() {
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  _numCallsAll = 0;
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  for (int k = ik; k < NUM_Kinds; k++) {
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    _numCallsTotal[k] = 0;
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    _numCalls_nv[k] = 0;
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    _numDoOopCallsTotal[k] = 0;
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    _numDoOopCalls_nv[k] = 0;
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  }
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}
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void SpecializationStats::print() {
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  const char* header_format = "    %20s %10s %11s %10s";
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  const char* line_format   = "    %20s %10d %11d %9.2f%%";
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  int all_numCallsTotal =
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    _numCallsTotal[ik] + _numCallsTotal[irk] + _numCallsTotal[oa];
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  int all_numCalls_nv =
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    _numCalls_nv[ik] + _numCalls_nv[irk] + _numCalls_nv[oa];
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  gclog_or_tty->print_cr("\nOf %d oop_oop_iterate calls %d (%6.3f%%) are in (ik, irk, oa).",
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                _numCallsAll, all_numCallsTotal,
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                100.0 * (float)all_numCallsTotal / (float)_numCallsAll);
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  // irk calls are double-counted.
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  int real_ik_numCallsTotal = _numCallsTotal[ik] - _numCallsTotal[irk];
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  int real_ik_numCalls_nv   = _numCalls_nv[ik]   - _numCalls_nv[irk];
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  gclog_or_tty->print_cr("");
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  gclog_or_tty->print_cr(header_format, "oop_oop_iterate:", "calls", "non-virtual", "pct");
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  gclog_or_tty->print_cr(header_format,
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                "----------",
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                "----------",
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                "-----------",
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                "----------");
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  gclog_or_tty->print_cr(line_format, "all",
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                all_numCallsTotal,
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                all_numCalls_nv,
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                100.0 * (float)all_numCalls_nv / (float)all_numCallsTotal);
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  gclog_or_tty->print_cr(line_format, "ik",
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                real_ik_numCallsTotal, real_ik_numCalls_nv,
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                100.0 * (float)real_ik_numCalls_nv /
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                (float)real_ik_numCallsTotal);
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  gclog_or_tty->print_cr(line_format, "irk",
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                _numCallsTotal[irk], _numCalls_nv[irk],
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                100.0 * (float)_numCalls_nv[irk] / (float)_numCallsTotal[irk]);
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  gclog_or_tty->print_cr(line_format, "oa",
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                _numCallsTotal[oa], _numCalls_nv[oa],
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                100.0 * (float)_numCalls_nv[oa] / (float)_numCallsTotal[oa]);
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  gclog_or_tty->print_cr("");
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  gclog_or_tty->print_cr(header_format, "do_oop:", "calls", "non-virtual", "pct");
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  gclog_or_tty->print_cr(header_format,
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                "----------",
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                "----------",
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                "-----------",
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                "----------");
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  int all_numDoOopCallsTotal =
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    _numDoOopCallsTotal[ik] + _numDoOopCallsTotal[irk] + _numDoOopCallsTotal[oa];
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  int all_numDoOopCalls_nv =
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    _numDoOopCalls_nv[ik] + _numDoOopCalls_nv[irk] + _numDoOopCalls_nv[oa];
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  gclog_or_tty->print_cr(line_format, "all",
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                all_numDoOopCallsTotal, all_numDoOopCalls_nv,
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                100.0 * (float)all_numDoOopCalls_nv /
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                (float)all_numDoOopCallsTotal);
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  const char* kind_names[] = { "ik", "irk", "oa" };
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  for (int k = ik; k < NUM_Kinds; k++) {
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    gclog_or_tty->print_cr(line_format, kind_names[k],
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                  _numDoOopCallsTotal[k], _numDoOopCalls_nv[k],
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                  (_numDoOopCallsTotal[k] > 0 ?
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                   100.0 * (float)_numDoOopCalls_nv[k] /
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                   (float)_numDoOopCallsTotal[k]
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                   : 0.0));
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  }
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}
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#endif  // ENABLE_SPECIALIZATION_STATS
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#endif  // !PRODUCT