jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/vm_operations

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@7383557659bd (annotated)

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp

Tue, 21 Aug 2012 14:10:39 -0700

author: johnc
date: Tue, 21 Aug 2012 14:10:39 -0700
changeset 3998: 7383557659bd
parent 3823: 37552638d24a
child 6876: 710a3c8b516e
child 7118: 227a9e5e4b4a
permissions: -rw-r--r--

7185699: G1: Prediction model discrepancies
Summary: Correct the result value of G1CollectedHeap::pending_card_num(). Change the code that calculates the GC efficiency of a non-young heap region to use historical data from mixed GCs and the actual number of live bytes when predicting how long it would take to collect the region. Changes were also reviewed by Thomas Schatzl.
Reviewed-by: azeemj, brutisso

 /*
  * Copyright (c) 2001, 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
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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
 #include "gc_implementation/shared/vmGCOperations.hpp"
 // VM_operations for the G1 collector.
 // VM_GC_Operation:
 //   - VM_CGC_Operation
 //   - VM_G1CollectFull
 //   - VM_G1OperationWithAllocRequest
 //     - VM_G1CollectForAllocation
 //     - VM_G1IncCollectionPause
 class VM_G1OperationWithAllocRequest: public VM_GC_Operation {
 protected:
   size_t    _word_size;
   HeapWord* _result;
   bool      _pause_succeeded;
 public:
   VM_G1OperationWithAllocRequest(unsigned int gc_count_before,
                                  size_t       word_size,
                                  GCCause::Cause gc_cause)
     : VM_GC_Operation(gc_count_before, gc_cause),
       _word_size(word_size), _result(NULL), _pause_succeeded(false) { }
   HeapWord* result() { return _result; }
   bool pause_succeeded() { return _pause_succeeded; }
 };
 class VM_G1CollectFull: public VM_GC_Operation {
 public:
   VM_G1CollectFull(unsigned int gc_count_before,
                    unsigned int full_gc_count_before,
                    GCCause::Cause cause)
     : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }
   virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
   virtual void doit();
   virtual const char* name() const {
     return "full garbage-first collection";
   }
 };
 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
 public:
   VM_G1CollectForAllocation(unsigned int gc_count_before,
                             size_t       word_size);
   virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
   virtual void doit();
   virtual const char* name() const {
     return "garbage-first collection to satisfy allocation";
   }
 };
 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
 private:
   bool         _should_initiate_conc_mark;
   bool         _should_retry_gc;
   double       _target_pause_time_ms;
   unsigned int _old_marking_cycles_completed_before;
 public:
   VM_G1IncCollectionPause(unsigned int   gc_count_before,
                           size_t         word_size,
                           bool           should_initiate_conc_mark,
                           double         target_pause_time_ms,
                           GCCause::Cause gc_cause);
   virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
   virtual bool doit_prologue();
   virtual void doit();
   virtual void doit_epilogue();
   virtual const char* name() const {
     return "garbage-first incremental collection pause";
   }
   bool should_retry_gc() const { return _should_retry_gc; }
 };
 // Concurrent GC stop-the-world operations such as remark and cleanup;
 // consider sharing these with CMS's counterparts.
 class VM_CGC_Operation: public VM_Operation {
   VoidClosure* _cl;
   const char* _printGCMessage;
   bool _needs_pll;
 protected:
   // java.lang.ref.Reference support
   void acquire_pending_list_lock();
   void release_and_notify_pending_list_lock();
 public:
   VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
     : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
   virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
   virtual void doit();
   virtual bool doit_prologue();
   virtual void doit_epilogue();
   virtual const char* name() const {
     return "concurrent gc";
   }
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@7383557659bd (annotated)

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp