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 #include "precompiled.hpp"
26 #include "gc_implementation/shared/plab.hpp"
27 #include "gc_interface/collectedHeap.hpp"
28 #include "memory/threadLocalAllocBuffer.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/oop.inline.hpp"
31
32 size_t PLAB::min_size() {
33 // Make sure that we return something that is larger than AlignmentReserve
34 return align_object_size(MAX2(MinTLABSize / HeapWordSize, (uintx)oopDesc::header_size())) + AlignmentReserve;
35 }
36
37 size_t PLAB::max_size() {
38 return ThreadLocalAllocBuffer::max_size();
39 }
40
41 PLAB::PLAB(size_t desired_plab_sz_) :
42 _word_sz(desired_plab_sz_), _bottom(NULL), _top(NULL),
43 _end(NULL), _hard_end(NULL), _allocated(0), _wasted(0), _undo_wasted(0)
44 {
45 // ArrayOopDesc::header_size depends on command line initialization.
46 AlignmentReserve = oopDesc::header_size() > MinObjAlignment ? align_object_size(arrayOopDesc::header_size(T_INT)) : 0;
47 assert(min_size() > AlignmentReserve,
48 err_msg("Minimum PLAB size " SIZE_FORMAT" must be larger than alignment reserve " SIZE_FORMAT" "
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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 #include "precompiled.hpp"
26 #include "gc/shared/collectedHeap.hpp"
27 #include "gc/shared/plab.hpp"
28 #include "gc/shared/threadLocalAllocBuffer.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/oop.inline.hpp"
31
32 size_t PLAB::min_size() {
33 // Make sure that we return something that is larger than AlignmentReserve
34 return align_object_size(MAX2(MinTLABSize / HeapWordSize, (uintx)oopDesc::header_size())) + AlignmentReserve;
35 }
36
37 size_t PLAB::max_size() {
38 return ThreadLocalAllocBuffer::max_size();
39 }
40
41 PLAB::PLAB(size_t desired_plab_sz_) :
42 _word_sz(desired_plab_sz_), _bottom(NULL), _top(NULL),
43 _end(NULL), _hard_end(NULL), _allocated(0), _wasted(0), _undo_wasted(0)
44 {
45 // ArrayOopDesc::header_size depends on command line initialization.
46 AlignmentReserve = oopDesc::header_size() > MinObjAlignment ? align_object_size(arrayOopDesc::header_size(T_INT)) : 0;
47 assert(min_size() > AlignmentReserve,
48 err_msg("Minimum PLAB size " SIZE_FORMAT" must be larger than alignment reserve " SIZE_FORMAT" "
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