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/g1/g1OldGenAllocationTracker.hpp"
27
28 G1OldGenAllocationTracker::G1OldGenAllocationTracker() :
29 _last_cycle_old_bytes(0),
30 _last_cycle_duration(0.0),
31 _allocated_bytes_since_last_gc(0) {
32 }
33
34 void G1OldGenAllocationTracker::reset_after_full_gc() {
35 _last_cycle_duration = 0;
36 reset_cycle_after_gc();
37 }
38
39 void G1OldGenAllocationTracker::reset_after_young_gc(double allocation_duration_s) {
40 _last_cycle_duration = allocation_duration_s;
41 reset_cycle_after_gc();
42 }
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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/g1/g1OldGenAllocationTracker.hpp"
27 #include "logging/log.hpp"
28
29 G1OldGenAllocationTracker::G1OldGenAllocationTracker() :
30 _last_period_old_bytes(0),
31 _last_period_humongous_bytes(0),
32 _humongous_bytes_after_last_gc(0),
33 _humongous_bytes_after_penultimate_gc(0),
34 _allocated_bytes_since_last_gc(0),
35 _allocated_humongous_bytes_since_last_gc(0) {
36 }
37
38 void G1OldGenAllocationTracker::reset_after_gc(size_t humongous_bytes_after_gc) {
39 // Record last
40 _last_period_old_bytes = _allocated_bytes_since_last_gc;
41 _last_period_humongous_bytes = _allocated_humongous_bytes_since_last_gc;
42 _humongous_bytes_after_penultimate_gc = _humongous_bytes_after_last_gc;
43 _humongous_bytes_after_last_gc = humongous_bytes_after_gc;
44 // Reset
45 _allocated_bytes_since_last_gc = 0;
46 _allocated_humongous_bytes_since_last_gc = 0;
47 log_debug(gc, alloc, stats)("Old generation allocation in the last mutator period, "
48 "old gen allocated: " SIZE_FORMAT "B, humongous allocated: " SIZE_FORMAT "B.",
49 _last_period_old_bytes, _last_period_humongous_bytes);
50 }
51
52 size_t G1OldGenAllocationTracker::last_period_net_survived_old_bytes() const {
53 // The upper limit of the freed region count is the number of regions allocated
54 // since the last gc. When more humongous regions survived the current gc than
55 // survived the previous one, deduct the increment.
56 size_t freed_humongous_bytes = _last_period_humongous_bytes;
57
58 if (freed_humongous_bytes > 0 && _humongous_bytes_after_penultimate_gc < _humongous_bytes_after_last_gc) {
59 freed_humongous_bytes -= _humongous_bytes_after_last_gc - _humongous_bytes_after_penultimate_gc;
60 }
61 assert(_last_period_old_bytes >= freed_humongous_bytes, "Allocation rate cannot be negative");
62 return _last_period_old_bytes - freed_humongous_bytes;
63 }
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