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

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

     1 /*

     2  * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 /*

    26  * This really ought to be an inline function, but apparently the C++

    27  * compiler sometimes sees fit to ignore inline declarations.  Sigh.

    28  */

    30 // This must a ifdef'ed because the counting it controls is in a

    31 // perf-critical inner loop.

    32 #define FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT 0

    34 template <class T> inline void FilterIntoCSClosure::do_oop_nv(T* p) {

    35   T heap_oop = oopDesc::load_heap_oop(p);

    36   if (!oopDesc::is_null(heap_oop) &&

    37       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {

    38     _oc->do_oop(p);

    39 #if FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT

    40     _dcto_cl->incr_count();

    41 #endif

    42   }

    43 }

    45 #define FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT 0

    47 template <class T> inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {

    48   T heap_oop = oopDesc::load_heap_oop(p);

    49   if (!oopDesc::is_null(heap_oop)) {

    50     HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);

    51     if (obj_hw < _r_bottom || obj_hw >= _r_end) {

    52       _oc->do_oop(p);

    53 #if FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT

    54       _out_of_region++;

    55 #endif

    56     }

    57   }

    58 }

    60 template <class T> inline void FilterInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {

    61   T heap_oop = oopDesc::load_heap_oop(p);

    62   if (!oopDesc::is_null(heap_oop) &&

    63       _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop)))

    64     _oc->do_oop(p);

    65 }

    67 template <class T> inline void FilterAndMarkInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {

    68   T heap_oop = oopDesc::load_heap_oop(p);

    69   if (!oopDesc::is_null(heap_oop)) {

    70     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    71     HeapRegion* hr = _g1->heap_region_containing((HeapWord*) obj);

    72     if (hr != NULL) {

    73       if (hr->in_collection_set())

    74         _oc->do_oop(p);

    75       else if (!hr->is_young())

    76         _cm->grayRoot(obj);

    77     }

    78   }

    79 }

    81 // This closure is applied to the fields of the objects that have just been copied.

    82 template <class T> inline void G1ParScanClosure::do_oop_nv(T* p) {

    83   T heap_oop = oopDesc::load_heap_oop(p);

    85   if (!oopDesc::is_null(heap_oop)) {

    86     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);

    87     if (_g1->in_cset_fast_test(obj)) {

    88       // We're not going to even bother checking whether the object is

    89       // already forwarded or not, as this usually causes an immediate

    90       // stall. We'll try to prefetch the object (for write, given that

    91       // we might need to install the forwarding reference) and we'll

    92       // get back to it when pop it from the queue

    93       Prefetch::write(obj->mark_addr(), 0);

    94       Prefetch::read(obj->mark_addr(), (HeapWordSize*2));

    96       // slightly paranoid test; I'm trying to catch potential

    97       // problems before we go into push_on_queue to know where the

    98       // problem is coming from

    99       assert(obj == oopDesc::load_decode_heap_oop(p),

   100              "p should still be pointing to obj");

   101       _par_scan_state->push_on_queue(p);

   102     } else {

   103       _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num());

   104     }

   105   }

   106 }

Mercurial > jdk8-mips64-public > hotspot / file revision

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

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