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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
27
28 #include "gc_implementation/g1/concurrentMark.hpp"
29 #include "gc_implementation/g1/g1CollectedHeap.hpp"
30 #include "gc_implementation/g1/g1AllocRegion.inline.hpp"
31 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
32 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
33 #include "gc_implementation/g1/heapRegionManager.inline.hpp"
34 #include "gc_implementation/g1/heapRegionSet.inline.hpp"
35 #include "runtime/orderAccess.inline.hpp"
36 #include "utilities/taskqueue.hpp"
37
38 PLABStats* G1CollectedHeap::alloc_buffer_stats(InCSetState dest) {
39 switch (dest.value()) {
40 case InCSetState::Young:
41 return &_survivor_plab_stats;
42 case InCSetState::Old:
43 return &_old_plab_stats;
44 default:
45 ShouldNotReachHere();
46 return NULL; // Keep some compilers happy
47 }
48 }
49
50 size_t G1CollectedHeap::desired_plab_sz(InCSetState dest) {
51 size_t gclab_word_size = alloc_buffer_stats(dest)->desired_plab_sz();
52 // Prevent humongous PLAB sizes for two reasons:
53 // * PLABs are allocated using a similar paths as oops, but should
54 // never be in a humongous region
55 // * Allowing humongous PLABs needlessly churns the region free lists
56 return MIN2(_humongous_object_threshold_in_words, gclab_word_size);
363 }
364
365 inline void G1CollectedHeap::set_humongous_is_live(oop obj) {
366 uint region = addr_to_region((HeapWord*)obj);
367 // Clear the flag in the humongous_reclaim_candidates table. Also
368 // reset the entry in the _in_cset_fast_test table so that subsequent references
369 // to the same humongous object do not go into the slow path again.
370 // This is racy, as multiple threads may at the same time enter here, but this
371 // is benign.
372 // During collection we only ever clear the "candidate" flag, and only ever clear the
373 // entry in the in_cset_fast_table.
374 // We only ever evaluate the contents of these tables (in the VM thread) after
375 // having synchronized the worker threads with the VM thread, or in the same
376 // thread (i.e. within the VM thread).
377 if (is_humongous_reclaim_candidate(region)) {
378 set_humongous_reclaim_candidate(region, false);
379 _in_cset_fast_test.clear_humongous(region);
380 }
381 }
382
383 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP
|
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_G1_G1COLLECTEDHEAP_INLINE_HPP
26 #define SHARE_VM_GC_G1_G1COLLECTEDHEAP_INLINE_HPP
27
28 #include "gc/g1/concurrentMark.hpp"
29 #include "gc/g1/g1AllocRegion.inline.hpp"
30 #include "gc/g1/g1CollectedHeap.hpp"
31 #include "gc/g1/g1CollectorPolicy.hpp"
32 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
33 #include "gc/g1/heapRegionManager.inline.hpp"
34 #include "gc/g1/heapRegionSet.inline.hpp"
35 #include "gc/shared/taskqueue.hpp"
36 #include "runtime/orderAccess.inline.hpp"
37
38 PLABStats* G1CollectedHeap::alloc_buffer_stats(InCSetState dest) {
39 switch (dest.value()) {
40 case InCSetState::Young:
41 return &_survivor_plab_stats;
42 case InCSetState::Old:
43 return &_old_plab_stats;
44 default:
45 ShouldNotReachHere();
46 return NULL; // Keep some compilers happy
47 }
48 }
49
50 size_t G1CollectedHeap::desired_plab_sz(InCSetState dest) {
51 size_t gclab_word_size = alloc_buffer_stats(dest)->desired_plab_sz();
52 // Prevent humongous PLAB sizes for two reasons:
53 // * PLABs are allocated using a similar paths as oops, but should
54 // never be in a humongous region
55 // * Allowing humongous PLABs needlessly churns the region free lists
56 return MIN2(_humongous_object_threshold_in_words, gclab_word_size);
363 }
364
365 inline void G1CollectedHeap::set_humongous_is_live(oop obj) {
366 uint region = addr_to_region((HeapWord*)obj);
367 // Clear the flag in the humongous_reclaim_candidates table. Also
368 // reset the entry in the _in_cset_fast_test table so that subsequent references
369 // to the same humongous object do not go into the slow path again.
370 // This is racy, as multiple threads may at the same time enter here, but this
371 // is benign.
372 // During collection we only ever clear the "candidate" flag, and only ever clear the
373 // entry in the in_cset_fast_table.
374 // We only ever evaluate the contents of these tables (in the VM thread) after
375 // having synchronized the worker threads with the VM thread, or in the same
376 // thread (i.e. within the VM thread).
377 if (is_humongous_reclaim_candidate(region)) {
378 set_humongous_reclaim_candidate(region, false);
379 _in_cset_fast_test.clear_humongous(region);
380 }
381 }
382
383 #endif // SHARE_VM_GC_G1_G1COLLECTEDHEAP_INLINE_HPP
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