Tue, 26 Nov 2013 14:35:38 +0100
8027675: Full collections with Serial slower in JDK 8 compared to 7u40
Summary: Reduced the number of calls to follow_class_loader and instead marked and pushed the klass holder directly. Also removed unneeded calls to adjust_klass.
Reviewed-by: coleenp, jmasa, mgerdin, tschatzl
1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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23 */
26 #include "precompiled.hpp"
27 #include "gc_implementation/shared/objectCountEventSender.hpp"
28 #include "memory/heapInspection.hpp"
29 #include "trace/tracing.hpp"
30 #include "utilities/globalDefinitions.hpp"
32 #if INCLUDE_SERVICES
34 void ObjectCountEventSender::send(const KlassInfoEntry* entry, GCId gc_id, jlong timestamp) {
35 #if INCLUDE_TRACE
36 assert(Tracing::is_event_enabled(EventObjectCountAfterGC::eventId),
37 "Only call this method if the event is enabled");
39 EventObjectCountAfterGC event(UNTIMED);
40 event.set_gcId(gc_id);
41 event.set_class(entry->klass());
42 event.set_count(entry->count());
43 event.set_totalSize(entry->words() * BytesPerWord);
44 event.set_endtime(timestamp);
45 event.commit();
46 #endif // INCLUDE_TRACE
47 }
49 bool ObjectCountEventSender::should_send_event() {
50 #if INCLUDE_TRACE
51 return Tracing::is_event_enabled(EventObjectCountAfterGC::eventId);
52 #else
53 return false;
54 #endif // INCLUDE_TRACE
55 }
57 #endif // INCLUDE_SERVICES