jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@15c5903cf9e1 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@15c5903cf9e1 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp

Mon, 03 Aug 2009 12:59:30 -0700

author: johnc
date: Mon, 03 Aug 2009 12:59:30 -0700
changeset 1324: 15c5903cf9e1
parent 1280: df6caf649ff7
child 1696: 0414c1049f15
permissions: -rw-r--r--

6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp

 /*
  * Copyright 2001-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 /*
  * This really ought to be an inline function, but apparently the C++
  * compiler sometimes sees fit to ignore inline declarations.  Sigh.
  */
 // This must a ifdef'ed because the counting it controls is in a
 // perf-critical inner loop.
 #define FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT 0
 template <class T> inline void FilterIntoCSClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) &&
       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {
     _oc->do_oop(p);
 #if FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT
     _dcto_cl->incr_count();
 #endif
   }
 }
 #define FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT 0
 template <class T> inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);
     if (obj_hw < _r_bottom || obj_hw >= _r_end) {
       _oc->do_oop(p);
 #if FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT
       _out_of_region++;
 #endif
     }
   }
 }
 template <class T> inline void FilterInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) &&
       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop)))
     _oc->do_oop(p);
 }
 template <class T> inline void FilterAndMarkInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     HeapRegion* hr = _g1->heap_region_containing((HeapWord*) obj);
     if (hr != NULL) {
       if (hr->in_collection_set())
         _oc->do_oop(p);
       else if (!hr->is_young())
         _cm->grayRoot(obj);
     }
   }
 }
 // This closure is applied to the fields of the objects that have just been copied.
 template <class T> inline void G1ParScanClosure::do_oop_nv(T* p) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if (_g1->in_cset_fast_test(obj)) {
       // We're not going to even bother checking whether the object is
       // already forwarded or not, as this usually causes an immediate
       // stall. We'll try to prefetch the object (for write, given that
       // we might need to install the forwarding reference) and we'll
       // get back to it when pop it from the queue
       Prefetch::write(obj->mark_addr(), 0);
       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
       // slightly paranoid test; I'm trying to catch potential
       // problems before we go into push_on_queue to know where the
       // problem is coming from
       assert(obj == oopDesc::load_decode_heap_oop(p),
              "p should still be pointing to obj");
       _par_scan_state->push_on_queue(p);
     } else {
       _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num());
     }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@15c5903cf9e1 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp