jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/heapRegionSet.inline.hpp@191174b49bec (annotated)

src/share/vm/gc_implementation/g1/heapRegionSet.inline.hpp@191174b49bec (annotated)

src/share/vm/gc_implementation/g1/heapRegionSet.inline.hpp

Mon, 24 Mar 2014 15:30:14 +0100

author: tschatzl
date: Mon, 24 Mar 2014 15:30:14 +0100
changeset 6402: 191174b49bec
parent 6385: 58fc1b1523dc
child 6422: 8ee855b4e667
permissions: -rw-r--r--

8035406: Improve data structure for Code Cache remembered sets
Summary: Change the code cache remembered sets data structure from a GrowableArray to a chunked list of nmethods. This makes the data structure more amenable to parallelization, and decreases freeing time.
Reviewed-by: mgerdin, brutisso

 /*
  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_INLINE_HPP
 #include "gc_implementation/g1/heapRegionSet.hpp"
 inline void HeapRegionSetBase::add(HeapRegion* hr) {
   check_mt_safety();
   assert(hr->containing_set() == NULL, hrs_ext_msg(this, "should not already have a containing set %u"));
   assert(hr->next() == NULL, hrs_ext_msg(this, "should not already be linked"));
   _count.increment(1u, hr->capacity());
   hr->set_containing_set(this);
   verify_region(hr);
 }
 inline void HeapRegionSetBase::remove(HeapRegion* hr) {
   check_mt_safety();
   verify_region(hr);
   assert(hr->next() == NULL, hrs_ext_msg(this, "should already be unlinked"));
   hr->set_containing_set(NULL);
   assert(_count.length() > 0, hrs_ext_msg(this, "pre-condition"));
   _count.decrement(1u, hr->capacity());
 }
 inline void FreeRegionList::add_as_head(HeapRegion* hr) {
   assert((length() == 0 && _head == NULL && _tail == NULL) ||
          (length() >  0 && _head != NULL && _tail != NULL),
          hrs_ext_msg(this, "invariant"));
   // add() will verify the region and check mt safety.
   add(hr);
   // Now link the region.
   if (_head != NULL) {
     hr->set_next(_head);
   } else {
     _tail = hr;
   }
   _head = hr;
 }
 inline void FreeRegionList::add_as_tail(HeapRegion* hr) {
   check_mt_safety();
   assert((length() == 0 && _head == NULL && _tail == NULL) ||
          (length() >  0 && _head != NULL && _tail != NULL),
          hrs_ext_msg(this, "invariant"));
   // add() will verify the region and check mt safety
   add(hr);
   // Now link the region.
   if (_tail != NULL) {
     _tail->set_next(hr);
   } else {
     _head = hr;
   }
   _tail = hr;
 }
 inline HeapRegion* FreeRegionList::remove_head() {
   assert(!is_empty(), hrs_ext_msg(this, "the list should not be empty"));
   assert(length() > 0 && _head != NULL && _tail != NULL,
          hrs_ext_msg(this, "invariant"));
   // We need to unlink it first.
   HeapRegion* hr = _head;
   _head = hr->next();
   if (_head == NULL) {
     _tail = NULL;
   }
   hr->set_next(NULL);
   // remove() will verify the region and check mt safety
   remove(hr);
   return hr;
 }
 inline HeapRegion* FreeRegionList::remove_head_or_null() {
   check_mt_safety();
   if (!is_empty()) {
     return remove_head();
   } else {
     return NULL;
   }
 }
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/heapRegionSet.inline.hpp@191174b49bec (annotated)

src/share/vm/gc_implementation/g1/heapRegionSet.inline.hpp