jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@29e7d79232b9 (annotated)

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@29e7d79232b9 (annotated)

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp

Tue, 19 May 2009 04:05:31 -0700

author: apetrusenko
date: Tue, 19 May 2009 04:05:31 -0700
changeset 1231: 29e7d79232b9
parent 777: 37f87013dfd8
child 1280: df6caf649ff7
permissions: -rw-r--r--

6819065: G1: eliminate high serial card table clearing time
Reviewed-by: iveresov, 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.
  *
  */
 #ifndef SERIALGC
 class DirtyCardQueueSet;
 // This barrier is specialized to use a logging barrier to support
 // snapshot-at-the-beginning marking.
 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS {
 private:
   // Add "pre_val" to a set of objects that may have been disconnected from the
   // pre-marking object graph.
   static void enqueue(oop pre_val);
 public:
   G1SATBCardTableModRefBS(MemRegion whole_heap,
                           int max_covered_regions);
   bool is_a(BarrierSet::Name bsn) {
     return bsn == BarrierSet::G1SATBCT || CardTableModRefBS::is_a(bsn);
   }
   virtual bool has_write_ref_pre_barrier() { return true; }
   // This notes that we don't need to access any BarrierSet data
   // structures, so this can be called from a static context.
   static void write_ref_field_pre_static(void* field, oop newVal) {
     assert(!UseCompressedOops, "Else needs to be templatized");
     oop preVal = *((oop*)field);
     if (preVal != NULL) {
       enqueue(preVal);
     }
   }
   // When we know the current java thread:
   static void write_ref_field_pre_static(void* field, oop newVal,
                                          JavaThread* jt);
   // We export this to make it available in cases where the static
   // type of the barrier set is known.  Note that it is non-virtual.
   inline void inline_write_ref_field_pre(void* field, oop newVal) {
     write_ref_field_pre_static(field, newVal);
   }
   // This is the more general virtual version.
   void write_ref_field_pre_work(void* field, oop new_val) {
     inline_write_ref_field_pre(field, new_val);
   }
   virtual void write_ref_array_pre(MemRegion mr);
 };
 // Adds card-table logging to the post-barrier.
 // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet.
 class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS {
  private:
   DirtyCardQueueSet& _dcqs;
  public:
   G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
                                  int max_covered_regions);
   bool is_a(BarrierSet::Name bsn) {
     return bsn == BarrierSet::G1SATBCTLogging ||
       G1SATBCardTableModRefBS::is_a(bsn);
   }
   void write_ref_field_work(void* field, oop new_val);
   // Can be called from static contexts.
   static void write_ref_field_static(void* field, oop new_val);
   // NB: if you do a whole-heap invalidation, the "usual invariant" defined
   // above no longer applies.
   void invalidate(MemRegion mr, bool whole_heap = false);
   void write_region_work(MemRegion mr)    { invalidate(mr); }
   void write_ref_array_work(MemRegion mr) { invalidate(mr); }
 };
 #endif // SERIALGC

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp@29e7d79232b9 (annotated)

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp