Tue, 23 Nov 2010 13:22:55 -0800
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
1 /*
2 * Copyright (c) 1999, 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.
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23 */
25 #ifndef SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_INLINE_HPP
26 #define SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_INLINE_HPP
28 #include "gc_interface/collectedHeap.hpp"
29 #include "memory/threadLocalAllocBuffer.hpp"
30 #include "runtime/atomic.hpp"
31 #include "utilities/copy.hpp"
33 inline HeapWord* ThreadLocalAllocBuffer::allocate(size_t size) {
34 invariants();
35 HeapWord* obj = top();
36 if (pointer_delta(end(), obj) >= size) {
37 // successful thread-local allocation
38 #ifdef ASSERT
39 // Skip mangling the space corresponding to the object header to
40 // ensure that the returned space is not considered parsable by
41 // any concurrent GC thread.
42 size_t hdr_size = oopDesc::header_size();
43 Copy::fill_to_words(obj + hdr_size, size - hdr_size, badHeapWordVal);
44 #endif // ASSERT
45 // This addition is safe because we know that top is
46 // at least size below end, so the add can't wrap.
47 set_top(obj + size);
49 invariants();
50 return obj;
51 }
52 return NULL;
53 }
55 inline size_t ThreadLocalAllocBuffer::compute_size(size_t obj_size) {
56 const size_t aligned_obj_size = align_object_size(obj_size);
58 // Compute the size for the new TLAB.
59 // The "last" tlab may be smaller to reduce fragmentation.
60 // unsafe_max_tlab_alloc is just a hint.
61 const size_t available_size = Universe::heap()->unsafe_max_tlab_alloc(myThread()) /
62 HeapWordSize;
63 size_t new_tlab_size = MIN2(available_size, desired_size() + aligned_obj_size);
65 // Make sure there's enough room for object and filler int[].
66 const size_t obj_plus_filler_size = aligned_obj_size + alignment_reserve();
67 if (new_tlab_size < obj_plus_filler_size) {
68 // If there isn't enough room for the allocation, return failure.
69 if (PrintTLAB && Verbose) {
70 gclog_or_tty->print_cr("ThreadLocalAllocBuffer::compute_size(" SIZE_FORMAT ")"
71 " returns failure",
72 obj_size);
73 }
74 return 0;
75 }
76 if (PrintTLAB && Verbose) {
77 gclog_or_tty->print_cr("ThreadLocalAllocBuffer::compute_size(" SIZE_FORMAT ")"
78 " returns " SIZE_FORMAT,
79 obj_size, new_tlab_size);
80 }
81 return new_tlab_size;
82 }
85 void ThreadLocalAllocBuffer::record_slow_allocation(size_t obj_size) {
86 // Raise size required to bypass TLAB next time. Why? Else there's
87 // a risk that a thread that repeatedly allocates objects of one
88 // size will get stuck on this slow path.
90 set_refill_waste_limit(refill_waste_limit() + refill_waste_limit_increment());
92 _slow_allocations++;
94 if (PrintTLAB && Verbose) {
95 Thread* thrd = myThread();
96 gclog_or_tty->print("TLAB: %s thread: "INTPTR_FORMAT" [id: %2d]"
97 " obj: "SIZE_FORMAT
98 " free: "SIZE_FORMAT
99 " waste: "SIZE_FORMAT"\n",
100 "slow", thrd, thrd->osthread()->thread_id(),
101 obj_size, free(), refill_waste_limit());
102 }
103 }
105 #endif // SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_INLINE_HPP