1 /*
2 * Copyright (c) 2001, 2009, 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
21 * questions.
22 *
23 */
24
25 // The Concurrent ZF Thread. Performs concurrent zero-filling.
26
27 class ConcurrentZFThread: public ConcurrentGCThread {
28 friend class VMStructs;
29 friend class ZeroFillRegionClosure;
30
31 private:
32
33 // Zero fill the heap region.
34 void processHeapRegion(HeapRegion* r);
35
36 // Stats
37 // Allocation (protected by heap lock).
38 static int _region_allocs; // Number of regions allocated
39 static int _sync_zfs; // Synchronous zero-fills +
40 static int _zf_waits; // Wait for conc zero-fill completion.
41
42 // Number of regions CFZ thread fills.
43 static int _regions_filled;
44
65 void print() const;
66
67 // Waits until "r" has been zero-filled. Requires caller to hold the
68 // ZF_mon.
69 static void wait_for_ZF_completed(HeapRegion* r);
70
71 // Get or clear the current unclean region. Should be done
72 // while holding the ZF_needed_mon lock.
73
74 // shutdown
75 void stop();
76
77 // Stats
78 static void note_region_alloc() {_region_allocs++; }
79 static void note_sync_zfs() { _sync_zfs++; }
80 static void note_zf_wait() { _zf_waits++; }
81 static void note_region_filled() { _regions_filled++; }
82
83 static void print_summary_info();
84 };
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1 /*
2 * Copyright (c) 2001, 2010, 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
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTZFTHREAD_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTZFTHREAD_HPP
27
28 #include "gc_implementation/shared/concurrentGCThread.hpp"
29
30 // The Concurrent ZF Thread. Performs concurrent zero-filling.
31
32 class ConcurrentZFThread: public ConcurrentGCThread {
33 friend class VMStructs;
34 friend class ZeroFillRegionClosure;
35
36 private:
37
38 // Zero fill the heap region.
39 void processHeapRegion(HeapRegion* r);
40
41 // Stats
42 // Allocation (protected by heap lock).
43 static int _region_allocs; // Number of regions allocated
44 static int _sync_zfs; // Synchronous zero-fills +
45 static int _zf_waits; // Wait for conc zero-fill completion.
46
47 // Number of regions CFZ thread fills.
48 static int _regions_filled;
49
70 void print() const;
71
72 // Waits until "r" has been zero-filled. Requires caller to hold the
73 // ZF_mon.
74 static void wait_for_ZF_completed(HeapRegion* r);
75
76 // Get or clear the current unclean region. Should be done
77 // while holding the ZF_needed_mon lock.
78
79 // shutdown
80 void stop();
81
82 // Stats
83 static void note_region_alloc() {_region_allocs++; }
84 static void note_sync_zfs() { _sync_zfs++; }
85 static void note_zf_wait() { _zf_waits++; }
86 static void note_region_filled() { _regions_filled++; }
87
88 static void print_summary_info();
89 };
90
91 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTZFTHREAD_HPP
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