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annotate src/share/vm/memory/threadLocalAllocBuffer.inline.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
author | stefank |
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date | Tue, 23 Nov 2010 13:22:55 -0800 |
parents | e9ff18c4ace7 |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_INLINE_HPP |
26 #define SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_INLINE_HPP | |
27 | |
28 #include "gc_interface/collectedHeap.hpp" | |
29 #include "memory/threadLocalAllocBuffer.hpp" | |
30 #include "runtime/atomic.hpp" | |
31 #include "utilities/copy.hpp" | |
32 | |
0 | 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 | |
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38 #ifdef ASSERT |
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39 // Skip mangling the space corresponding to the object header to |
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40 // ensure that the returned space is not considered parsable by |
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41 // any concurrent GC thread. |
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42 size_t hdr_size = oopDesc::header_size(); |
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43 Copy::fill_to_words(obj + hdr_size, size - hdr_size, badHeapWordVal); |
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44 #endif // ASSERT |
0 | 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); | |
48 | |
49 invariants(); | |
50 return obj; | |
51 } | |
52 return NULL; | |
53 } | |
54 | |
55 inline size_t ThreadLocalAllocBuffer::compute_size(size_t obj_size) { | |
56 const size_t aligned_obj_size = align_object_size(obj_size); | |
57 | |
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); | |
64 | |
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 } | |
83 | |
84 | |
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. | |
89 | |
90 set_refill_waste_limit(refill_waste_limit() + refill_waste_limit_increment()); | |
91 | |
92 _slow_allocations++; | |
93 | |
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 } | |
1972 | 104 |
105 #endif // SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_INLINE_HPP |