Mercurial > hg > truffle

annotate src/share/vm/memory/barrierSet.inline.hpp @ 20543:e7d0505c8a30

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8059758: Footprint regressions with JDK-8038423 Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything. Reviewed-by: jwilhelm, brutisso
author tschatzl
date Fri, 10 Oct 2014 15:51:58 +0200
parents 3205e78d8193
children 4ca6dc0799b6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1 /*
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load
duke
parents:
diff changeset
4 *
a61af66fc99e Initial load
duke
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load
duke
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load
duke
parents:
diff changeset
7 * published by the Free Software Foundation.
a61af66fc99e Initial load
duke
parents:
diff changeset
8 *
a61af66fc99e Initial load
duke
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load
duke
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load
duke
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load
duke
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load
duke
parents:
diff changeset
13 * accompanied this code).
a61af66fc99e Initial load
duke
parents:
diff changeset
14 *
a61af66fc99e Initial load
duke
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load
duke
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load
duke
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load
duke
parents:
diff changeset
18 *
1552
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1245
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1245
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1245
diff changeset
21 * questions.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
22 *
a61af66fc99e Initial load
duke
parents:
diff changeset
23 */
a61af66fc99e Initial load
duke
parents:
diff changeset
24
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
25 #ifndef SHARE_VM_MEMORY_BARRIERSET_INLINE_HPP
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
26 #define SHARE_VM_MEMORY_BARRIERSET_INLINE_HPP
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
27
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
28 #include "memory/barrierSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
29 #include "memory/cardTableModRefBS.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
30
0
a61af66fc99e Initial load
duke
parents:
diff changeset
31 // Inline functions of BarrierSet, which de-virtualize certain
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 356
diff changeset
32 // performance-critical calls when the barrier is the most common
0
a61af66fc99e Initial load
duke
parents:
diff changeset
33 // card-table kind.
a61af66fc99e Initial load
duke
parents:
diff changeset
34
845
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 356
diff changeset
35 template <class T> void BarrierSet::write_ref_field_pre(T* field, oop new_val) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
36 if (kind() == CardTableModRef) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
37 ((CardTableModRefBS*)this)->inline_write_ref_field_pre(field, new_val);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
38 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
39 write_ref_field_pre_work(field, new_val);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
40 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
41 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 113
diff changeset
42
14443
3205e78d8193 8029396: PPC64 (part 212): Several memory ordering fixes in C-code.
goetz
parents: 1972
diff changeset
43 void BarrierSet::write_ref_field(void* field, oop new_val, bool release) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
44 if (kind() == CardTableModRef) {
14443
3205e78d8193 8029396: PPC64 (part 212): Several memory ordering fixes in C-code.
goetz
parents: 1972
diff changeset
45 ((CardTableModRefBS*)this)->inline_write_ref_field(field, new_val, release);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
46 } else {
14443
3205e78d8193 8029396: PPC64 (part 212): Several memory ordering fixes in C-code.
goetz
parents: 1972
diff changeset
47 write_ref_field_work(field, new_val, release);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
48 }
a61af66fc99e Initial load
duke
parents:
diff changeset
49 }
a61af66fc99e Initial load
duke
parents:
diff changeset
50
1091
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
51 // count is number of array elements being written
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
52 void BarrierSet::write_ref_array(HeapWord* start, size_t count) {
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
53 assert(count <= (size_t)max_intx, "count too large");
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
54 HeapWord* end = (HeapWord*)((char*)start + (count*heapOopSize));
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
55 // In the case of compressed oops, start and end may potentially be misaligned;
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
56 // so we need to conservatively align the first downward (this is not
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
57 // strictly necessary for current uses, but a case of good hygiene and,
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
58 // if you will, aesthetics) and the second upward (this is essential for
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
59 // current uses) to a HeapWord boundary, so we mark all cards overlapping
1245
6484c4ee11cb 6904516: More object array barrier fixes, following up on 6906727
ysr
parents: 1091
diff changeset
60 // this write. If this evolves in the future to calling a
1091
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
61 // logging barrier of narrow oop granularity, like the pre-barrier for G1
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
62 // (mentioned here merely by way of example), we will need to change this
1245
6484c4ee11cb 6904516: More object array barrier fixes, following up on 6906727
ysr
parents: 1091
diff changeset
63 // interface, so it is "exactly precise" (if i may be allowed the adverbial
6484c4ee11cb 6904516: More object array barrier fixes, following up on 6906727
ysr
parents: 1091
diff changeset
64 // redundancy for emphasis) and does not include narrow oop slots not
6484c4ee11cb 6904516: More object array barrier fixes, following up on 6906727
ysr
parents: 1091
diff changeset
65 // included in the original write interval.
1091
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
66 HeapWord* aligned_start = (HeapWord*)align_size_down((uintptr_t)start, HeapWordSize);
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
67 HeapWord* aligned_end = (HeapWord*)align_size_up ((uintptr_t)end, HeapWordSize);
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
68 // If compressed oops were not being used, these should already be aligned
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
69 assert(UseCompressedOops || (aligned_start == start && aligned_end == end),
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
70 "Expected heap word alignment of start and end");
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
71 #if 0
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
72 warning("Post:\t" INTPTR_FORMAT "[" SIZE_FORMAT "] : [" INTPTR_FORMAT","INTPTR_FORMAT")\t",
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
73 start, count, aligned_start, aligned_end);
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
74 #endif
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
75 write_ref_array_work(MemRegion(aligned_start, aligned_end));
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
76 }
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
77
6aa7255741f3 6906727: UseCompressedOops: some card-marking fixes related to object arrays
ysr
parents: 845
diff changeset
78
0
a61af66fc99e Initial load
duke
parents:
diff changeset
79 void BarrierSet::write_region(MemRegion mr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
80 if (kind() == CardTableModRef) {
a61af66fc99e Initial load
duke
parents:
diff changeset
81 ((CardTableModRefBS*)this)->inline_write_region(mr);
a61af66fc99e Initial load
duke
parents:
diff changeset
82 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
83 write_region_work(mr);
a61af66fc99e Initial load
duke
parents:
diff changeset
84 }
a61af66fc99e Initial load
duke
parents:
diff changeset
85 }
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
86
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
87 #endif // SHARE_VM_MEMORY_BARRIERSET_INLINE_HPP