src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp

RFE_8195103_reduce_initial_card_marks

*** 1,7 ****
  /*
!  * Copyright (c) 2001, 2017, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2001, 2018, 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.
***************
*** 55,66 ****
  PSAdaptiveSizePolicy* ParallelScavengeHeap::_size_policy = NULL;
  PSGCAdaptivePolicyCounters* ParallelScavengeHeap::_gc_policy_counters = NULL;
  GCTaskManager* ParallelScavengeHeap::_gc_task_manager = NULL;
  
  jint ParallelScavengeHeap::initialize() {
-   CollectedHeap::pre_initialize();
- 
    const size_t heap_size = _collector_policy->max_heap_byte_size();
  
    ReservedSpace heap_rs = Universe::reserve_heap(heap_size, _collector_policy->heap_alignment());
  
    os::trace_page_sizes("Heap",
--- 55,64 ----
***************
*** 488,504 ****
  
  void ParallelScavengeHeap::resize_all_tlabs() {
    CollectedHeap::resize_all_tlabs();
  }
  
- bool ParallelScavengeHeap::can_elide_initializing_store_barrier(oop new_obj) {
-   // We don't need barriers for stores to objects in the
-   // young gen and, a fortiori, for initializing stores to
-   // objects therein.
-   return is_in_young(new_obj);
- }
- 
  // This method is used by System.gc() and JVMTI.
  void ParallelScavengeHeap::collect(GCCause::Cause cause) {
    assert(!Heap_lock->owned_by_self(),
      "this thread should not own the Heap_lock");
  
--- 486,495 ----
***************
*** 717,722 ****
    memory_pools.append(_eden_pool);
    memory_pools.append(_survivor_pool);
    memory_pools.append(_old_pool);
    return memory_pools;
  }
- 
--- 708,712 ----