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_SHARED_PLAB_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_PLAB_HPP
27
28 #include "gc_implementation/shared/gcUtil.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/atomic.hpp"
31 #include "utilities/globalDefinitions.hpp"
32
33 // Forward declarations.
34 class PLABStats;
35
36 // A per-thread allocation buffer used during GC.
37 class PLAB: public CHeapObj<mtGC> {
38 protected:
39 char head[32];
40 size_t _word_sz; // In HeapWord units
41 HeapWord* _bottom;
42 HeapWord* _top;
43 HeapWord* _end; // Last allocatable address + 1
44 HeapWord* _hard_end; // _end + AlignmentReserve
45 // In support of ergonomic sizing of PLAB's
46 size_t _allocated; // in HeapWord units
47 size_t _wasted; // in HeapWord units
48 size_t _undo_wasted;
190 // updates _desired_plab_sz and clears sensor accumulators.
191 void adjust_desired_plab_sz(uint no_of_gc_workers);
192
193 void add_allocated(size_t v) {
194 Atomic::add_ptr(v, &_allocated);
195 }
196
197 void add_unused(size_t v) {
198 Atomic::add_ptr(v, &_unused);
199 }
200
201 void add_wasted(size_t v) {
202 Atomic::add_ptr(v, &_wasted);
203 }
204
205 void add_undo_wasted(size_t v) {
206 Atomic::add_ptr(v, &_undo_wasted);
207 }
208 };
209
210 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_PLAB_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_SHARED_PLAB_HPP
26 #define SHARE_VM_GC_SHARED_PLAB_HPP
27
28 #include "gc/shared/gcUtil.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/atomic.hpp"
31 #include "utilities/globalDefinitions.hpp"
32
33 // Forward declarations.
34 class PLABStats;
35
36 // A per-thread allocation buffer used during GC.
37 class PLAB: public CHeapObj<mtGC> {
38 protected:
39 char head[32];
40 size_t _word_sz; // In HeapWord units
41 HeapWord* _bottom;
42 HeapWord* _top;
43 HeapWord* _end; // Last allocatable address + 1
44 HeapWord* _hard_end; // _end + AlignmentReserve
45 // In support of ergonomic sizing of PLAB's
46 size_t _allocated; // in HeapWord units
47 size_t _wasted; // in HeapWord units
48 size_t _undo_wasted;
190 // updates _desired_plab_sz and clears sensor accumulators.
191 void adjust_desired_plab_sz(uint no_of_gc_workers);
192
193 void add_allocated(size_t v) {
194 Atomic::add_ptr(v, &_allocated);
195 }
196
197 void add_unused(size_t v) {
198 Atomic::add_ptr(v, &_unused);
199 }
200
201 void add_wasted(size_t v) {
202 Atomic::add_ptr(v, &_wasted);
203 }
204
205 void add_undo_wasted(size_t v) {
206 Atomic::add_ptr(v, &_undo_wasted);
207 }
208 };
209
210 #endif // SHARE_VM_GC_SHARED_PLAB_HPP
|