jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@a3953c777565 (annotated)

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@a3953c777565 (annotated)

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

Wed, 23 Jul 2014 09:03:32 +0200

author: tschatzl
date: Wed, 23 Jul 2014 09:03:32 +0200
changeset 7010: a3953c777565
parent 6992: 2c6ef90f030a
child 7049: eec72fa4b108
permissions: -rw-r--r--

8027959: Early reclamation of large objects in G1
Summary: Try to reclaim humongous objects at every young collection after doing a conservative estimate of its liveness.
Reviewed-by: brutisso, mgerdin

 /*
  * Copyright (c) 2001, 2014, 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_G1OOPCLOSURES_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP
 #include "gc_implementation/g1/concurrentMark.inline.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.hpp"
 #include "gc_implementation/g1/g1OopClosures.hpp"
 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp"
 #include "gc_implementation/g1/g1RemSet.hpp"
 #include "gc_implementation/g1/g1RemSet.inline.hpp"
 #include "gc_implementation/g1/heapRegionRemSet.hpp"
 #include "memory/iterator.inline.hpp"
 #include "runtime/prefetch.inline.hpp"
 /*
  * This really ought to be an inline function, but apparently the C++
  * compiler sometimes sees fit to ignore inline declarations.  Sigh.
  */
 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->is_in_cset_or_humongous(oopDesc::decode_heap_oop_not_null(heap_oop))) {
     _oc->do_oop(p);
   }
 }
 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);
     }
   }
 }
 // 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);
     G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj);
     if (state == G1CollectedHeap::InCSet) {
       // 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)) ||
              (obj->is_forwarded() &&
                  obj->forwardee() == oopDesc::load_decode_heap_oop(p)),
              "p should still be pointing to obj or to its forwardee");
       _par_scan_state->push_on_queue(p);
     } else {
       if (state == G1CollectedHeap::IsHumongous) {
         _g1->set_humongous_is_live(obj);
       }
       _par_scan_state->update_rs(_from, p, _worker_id);
     }
   }
 }
 template <class T>
 inline void G1ParPushHeapRSClosure::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->is_in_cset_or_humongous(obj)) {
       Prefetch::write(obj->mark_addr(), 0);
       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
       // Place on the references queue
       _par_scan_state->push_on_queue(p);
     } else {
       assert(!_g1->obj_in_cs(obj), "checking");
     }
   }
 }
 template <class T>
 inline void G1CMOopClosure::do_oop_nv(T* p) {
   oop obj = oopDesc::load_decode_heap_oop(p);
   if (_cm->verbose_high()) {
     gclog_or_tty->print_cr("[%u] we're looking at location "
                            "*"PTR_FORMAT" = "PTR_FORMAT,
                            _task->worker_id(), p2i(p), p2i((void*) obj));
   }
   _task->deal_with_reference(obj);
 }
 template <class T>
 inline void G1RootRegionScanClosure::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 = _g1h->heap_region_containing((HeapWord*) obj);
     if (hr != NULL) {
       _cm->grayRoot(obj, obj->size(), _worker_id, hr);
     }
   }
 }
 template <class T>
 inline void G1Mux2Closure::do_oop_nv(T* p) {
   // Apply first closure; then apply the second.
   _c1->do_oop(p);
   _c2->do_oop(p);
 }
 template <class T>
 inline void G1TriggerClosure::do_oop_nv(T* p) {
   // Record that this closure was actually applied (triggered).
   _triggered = true;
 }
 template <class T>
 inline void G1InvokeIfNotTriggeredClosure::do_oop_nv(T* p) {
   if (!_trigger_cl->triggered()) {
     _oop_cl->do_oop(p);
   }
 }
 template <class T>
 inline void G1UpdateRSOrPushRefOopClosure::do_oop_nv(T* p) {
   oop obj = oopDesc::load_decode_heap_oop(p);
 #ifdef ASSERT
   // can't do because of races
   // assert(obj == NULL || obj->is_oop(), "expected an oop");
   // Do the safe subset of is_oop
   if (obj != NULL) {
 #ifdef CHECK_UNHANDLED_OOPS
     oopDesc* o = obj.obj();
 #else
     oopDesc* o = obj;
 #endif // CHECK_UNHANDLED_OOPS
     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
   }
 #endif // ASSERT
   assert(_from != NULL, "from region must be non-NULL");
   assert(_from->is_in_reserved(p), "p is not in from");
   HeapRegion* to = _g1->heap_region_containing(obj);
   if (to != NULL && _from != to) {
     // The _record_refs_into_cset flag is true during the RSet
     // updating part of an evacuation pause. It is false at all
     // other times:
     //  * rebuilding the rembered sets after a full GC
     //  * during concurrent refinement.
     //  * updating the remembered sets of regions in the collection
     //    set in the event of an evacuation failure (when deferred
     //    updates are enabled).
     if (_record_refs_into_cset && to->in_collection_set()) {
       // We are recording references that point into the collection
       // set and this particular reference does exactly that...
       // If the referenced object has already been forwarded
       // to itself, we are handling an evacuation failure and
       // we have already visited/tried to copy this object
       // there is no need to retry.
       if (!self_forwarded(obj)) {
         assert(_push_ref_cl != NULL, "should not be null");
         // Push the reference in the refs queue of the G1ParScanThreadState
         // instance for this worker thread.
         _push_ref_cl->do_oop(p);
       }
       // Deferred updates to the CSet are either discarded (in the normal case),
       // or processed (if an evacuation failure occurs) at the end
       // of the collection.
       // See G1RemSet::cleanup_after_oops_into_collection_set_do().
       return;
     }
     // We either don't care about pushing references that point into the
     // collection set (i.e. we're not during an evacuation pause) _or_
     // the reference doesn't point into the collection set. Either way
     // we add the reference directly to the RSet of the region containing
     // the referenced object.
     assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
     to->rem_set()->add_reference(p, _worker_i);
   }
 }
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp@a3953c777565 (annotated)

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