annotate src/share/vm/memory/threadLocalAllocBuffer.cpp @ 14726:92aa6797d639

Backed out merge changeset: b51e29501f30 Backed out merge revision to its first parent (8f483e200405)
author Doug Simon <doug.simon@oracle.com>
date Mon, 24 Mar 2014 21:30:43 +0100
parents d8041d695d19
children 4ca6dc0799b6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1 /*
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
2 * Copyright (c) 1999, 2011, 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: 1165
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1165
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: 1165
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 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
26 #include "memory/genCollectedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
27 #include "memory/resourceArea.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
28 #include "memory/threadLocalAllocBuffer.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
29 #include "memory/universe.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
30 #include "oops/oop.inline.hpp"
7180
f34d701e952e 8003935: Simplify the needed includes for using Thread::current()
stefank
parents: 3960
diff changeset
31 #include "runtime/thread.inline.hpp"
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
32 #include "utilities/copy.hpp"
0
a61af66fc99e Initial load
duke
parents:
diff changeset
33
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1552
diff changeset
34 // Thread-Local Edens support
0
a61af66fc99e Initial load
duke
parents:
diff changeset
35
a61af66fc99e Initial load
duke
parents:
diff changeset
36 // static member initialization
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
37 size_t ThreadLocalAllocBuffer::_max_size = 0;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
38 unsigned ThreadLocalAllocBuffer::_target_refills = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
39 GlobalTLABStats* ThreadLocalAllocBuffer::_global_stats = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
40
a61af66fc99e Initial load
duke
parents:
diff changeset
41 void ThreadLocalAllocBuffer::clear_before_allocation() {
a61af66fc99e Initial load
duke
parents:
diff changeset
42 _slow_refill_waste += (unsigned)remaining();
a61af66fc99e Initial load
duke
parents:
diff changeset
43 make_parsable(true); // also retire the TLAB
a61af66fc99e Initial load
duke
parents:
diff changeset
44 }
a61af66fc99e Initial load
duke
parents:
diff changeset
45
a61af66fc99e Initial load
duke
parents:
diff changeset
46 void ThreadLocalAllocBuffer::accumulate_statistics_before_gc() {
a61af66fc99e Initial load
duke
parents:
diff changeset
47 global_stats()->initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
48
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
49 for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
50 thread->tlab().accumulate_statistics();
a61af66fc99e Initial load
duke
parents:
diff changeset
51 thread->tlab().initialize_statistics();
a61af66fc99e Initial load
duke
parents:
diff changeset
52 }
a61af66fc99e Initial load
duke
parents:
diff changeset
53
a61af66fc99e Initial load
duke
parents:
diff changeset
54 // Publish new stats if some allocation occurred.
a61af66fc99e Initial load
duke
parents:
diff changeset
55 if (global_stats()->allocation() != 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
56 global_stats()->publish();
a61af66fc99e Initial load
duke
parents:
diff changeset
57 if (PrintTLAB) {
a61af66fc99e Initial load
duke
parents:
diff changeset
58 global_stats()->print();
a61af66fc99e Initial load
duke
parents:
diff changeset
59 }
a61af66fc99e Initial load
duke
parents:
diff changeset
60 }
a61af66fc99e Initial load
duke
parents:
diff changeset
61 }
a61af66fc99e Initial load
duke
parents:
diff changeset
62
a61af66fc99e Initial load
duke
parents:
diff changeset
63 void ThreadLocalAllocBuffer::accumulate_statistics() {
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
64 Thread* thread = myThread();
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
65 size_t capacity = Universe::heap()->tlab_capacity(thread);
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
66 size_t used = Universe::heap()->tlab_used(thread);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
67
a61af66fc99e Initial load
duke
parents:
diff changeset
68 _gc_waste += (unsigned)remaining();
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
69 size_t total_allocated = thread->allocated_bytes();
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
70 size_t allocated_since_last_gc = total_allocated - _allocated_before_last_gc;
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
71 _allocated_before_last_gc = total_allocated;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
72
a61af66fc99e Initial load
duke
parents:
diff changeset
73 if (PrintTLAB && (_number_of_refills > 0 || Verbose)) {
a61af66fc99e Initial load
duke
parents:
diff changeset
74 print_stats("gc");
a61af66fc99e Initial load
duke
parents:
diff changeset
75 }
a61af66fc99e Initial load
duke
parents:
diff changeset
76
a61af66fc99e Initial load
duke
parents:
diff changeset
77 if (_number_of_refills > 0) {
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
78 // Update allocation history if a reasonable amount of eden was allocated.
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
79 bool update_allocation_history = used > 0.5 * capacity;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
80
a61af66fc99e Initial load
duke
parents:
diff changeset
81 if (update_allocation_history) {
a61af66fc99e Initial load
duke
parents:
diff changeset
82 // Average the fraction of eden allocated in a tlab by this
a61af66fc99e Initial load
duke
parents:
diff changeset
83 // thread for use in the next resize operation.
a61af66fc99e Initial load
duke
parents:
diff changeset
84 // _gc_waste is not subtracted because it's included in
a61af66fc99e Initial load
duke
parents:
diff changeset
85 // "used".
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
86 // The result can be larger than 1.0 due to direct to old allocations.
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
87 // These allocations should ideally not be counted but since it is not possible
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
88 // to filter them out here we just cap the fraction to be at most 1.0.
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
89 double alloc_frac = MIN2(1.0, (double) allocated_since_last_gc / used);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
90 _allocation_fraction.sample(alloc_frac);
a61af66fc99e Initial load
duke
parents:
diff changeset
91 }
a61af66fc99e Initial load
duke
parents:
diff changeset
92 global_stats()->update_allocating_threads();
a61af66fc99e Initial load
duke
parents:
diff changeset
93 global_stats()->update_number_of_refills(_number_of_refills);
a61af66fc99e Initial load
duke
parents:
diff changeset
94 global_stats()->update_allocation(_number_of_refills * desired_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
95 global_stats()->update_gc_waste(_gc_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
96 global_stats()->update_slow_refill_waste(_slow_refill_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
97 global_stats()->update_fast_refill_waste(_fast_refill_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
98
a61af66fc99e Initial load
duke
parents:
diff changeset
99 } else {
7236
579ee1eb0f30 fixed overly strong assertion
Doug Simon <doug.simon@oracle.com>
parents: 7180
diff changeset
100 // (ds) _gc_waste can be non-zero (see above) even if _number_of_refills is 0
0
a61af66fc99e Initial load
duke
parents:
diff changeset
101 assert(_number_of_refills == 0 && _fast_refill_waste == 0 &&
7236
579ee1eb0f30 fixed overly strong assertion
Doug Simon <doug.simon@oracle.com>
parents: 7180
diff changeset
102 _slow_refill_waste == 0/* && _gc_waste == 0*/,
0
a61af66fc99e Initial load
duke
parents:
diff changeset
103 "tlab stats == 0");
a61af66fc99e Initial load
duke
parents:
diff changeset
104 }
a61af66fc99e Initial load
duke
parents:
diff changeset
105 global_stats()->update_slow_allocations(_slow_allocations);
a61af66fc99e Initial load
duke
parents:
diff changeset
106 }
a61af66fc99e Initial load
duke
parents:
diff changeset
107
a61af66fc99e Initial load
duke
parents:
diff changeset
108 // Fills the current tlab with a dummy filler array to create
a61af66fc99e Initial load
duke
parents:
diff changeset
109 // an illusion of a contiguous Eden and optionally retires the tlab.
a61af66fc99e Initial load
duke
parents:
diff changeset
110 // Waste accounting should be done in caller as appropriate; see,
a61af66fc99e Initial load
duke
parents:
diff changeset
111 // for example, clear_before_allocation().
a61af66fc99e Initial load
duke
parents:
diff changeset
112 void ThreadLocalAllocBuffer::make_parsable(bool retire) {
a61af66fc99e Initial load
duke
parents:
diff changeset
113 if (end() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
114 invariants();
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
115
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
116 if (retire) {
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
117 myThread()->incr_allocated_bytes(used_bytes());
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
118 }
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
119
1165
2dd52dea6d28 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 579
diff changeset
120 CollectedHeap::fill_with_object(top(), hard_end(), retire);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
121
a61af66fc99e Initial load
duke
parents:
diff changeset
122 if (retire || ZeroTLAB) { // "Reset" the TLAB
a61af66fc99e Initial load
duke
parents:
diff changeset
123 set_start(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
124 set_top(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
125 set_pf_top(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
126 set_end(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
127 }
a61af66fc99e Initial load
duke
parents:
diff changeset
128 }
a61af66fc99e Initial load
duke
parents:
diff changeset
129 assert(!(retire || ZeroTLAB) ||
a61af66fc99e Initial load
duke
parents:
diff changeset
130 (start() == NULL && end() == NULL && top() == NULL),
a61af66fc99e Initial load
duke
parents:
diff changeset
131 "TLAB must be reset");
a61af66fc99e Initial load
duke
parents:
diff changeset
132 }
a61af66fc99e Initial load
duke
parents:
diff changeset
133
a61af66fc99e Initial load
duke
parents:
diff changeset
134 void ThreadLocalAllocBuffer::resize_all_tlabs() {
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
135 if (ResizeTLAB) {
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
136 for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) {
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
137 thread->tlab().resize();
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
138 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
139 }
a61af66fc99e Initial load
duke
parents:
diff changeset
140 }
a61af66fc99e Initial load
duke
parents:
diff changeset
141
a61af66fc99e Initial load
duke
parents:
diff changeset
142 void ThreadLocalAllocBuffer::resize() {
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
143 // Compute the next tlab size using expected allocation amount
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
144 assert(ResizeTLAB, "Should not call this otherwise");
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
145 size_t alloc = (size_t)(_allocation_fraction.average() *
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
146 (Universe::heap()->tlab_capacity(myThread()) / HeapWordSize));
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
147 size_t new_size = alloc / _target_refills;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
148
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
149 new_size = MIN2(MAX2(new_size, min_size()), max_size());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
150
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
151 size_t aligned_new_size = align_object_size(new_size);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
152
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
153 if (PrintTLAB && Verbose) {
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
154 gclog_or_tty->print("TLAB new size: thread: " INTPTR_FORMAT " [id: %2d]"
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
155 " refills %d alloc: %8.6f desired_size: " SIZE_FORMAT " -> " SIZE_FORMAT "\n",
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
156 myThread(), myThread()->osthread()->thread_id(),
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
157 _target_refills, _allocation_fraction.average(), desired_size(), aligned_new_size);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
158 }
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
159 set_desired_size(aligned_new_size);
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
160 set_refill_waste_limit(initial_refill_waste_limit());
0
a61af66fc99e Initial load
duke
parents:
diff changeset
161 }
a61af66fc99e Initial load
duke
parents:
diff changeset
162
a61af66fc99e Initial load
duke
parents:
diff changeset
163 void ThreadLocalAllocBuffer::initialize_statistics() {
a61af66fc99e Initial load
duke
parents:
diff changeset
164 _number_of_refills = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
165 _fast_refill_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
166 _slow_refill_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
167 _gc_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
168 _slow_allocations = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
169 }
a61af66fc99e Initial load
duke
parents:
diff changeset
170
a61af66fc99e Initial load
duke
parents:
diff changeset
171 void ThreadLocalAllocBuffer::fill(HeapWord* start,
a61af66fc99e Initial load
duke
parents:
diff changeset
172 HeapWord* top,
a61af66fc99e Initial load
duke
parents:
diff changeset
173 size_t new_size) {
a61af66fc99e Initial load
duke
parents:
diff changeset
174 _number_of_refills++;
a61af66fc99e Initial load
duke
parents:
diff changeset
175 if (PrintTLAB && Verbose) {
a61af66fc99e Initial load
duke
parents:
diff changeset
176 print_stats("fill");
a61af66fc99e Initial load
duke
parents:
diff changeset
177 }
a61af66fc99e Initial load
duke
parents:
diff changeset
178 assert(top <= start + new_size - alignment_reserve(), "size too small");
a61af66fc99e Initial load
duke
parents:
diff changeset
179 initialize(start, top, start + new_size - alignment_reserve());
a61af66fc99e Initial load
duke
parents:
diff changeset
180
a61af66fc99e Initial load
duke
parents:
diff changeset
181 // Reset amount of internal fragmentation
a61af66fc99e Initial load
duke
parents:
diff changeset
182 set_refill_waste_limit(initial_refill_waste_limit());
a61af66fc99e Initial load
duke
parents:
diff changeset
183 }
a61af66fc99e Initial load
duke
parents:
diff changeset
184
a61af66fc99e Initial load
duke
parents:
diff changeset
185 void ThreadLocalAllocBuffer::initialize(HeapWord* start,
a61af66fc99e Initial load
duke
parents:
diff changeset
186 HeapWord* top,
a61af66fc99e Initial load
duke
parents:
diff changeset
187 HeapWord* end) {
a61af66fc99e Initial load
duke
parents:
diff changeset
188 set_start(start);
a61af66fc99e Initial load
duke
parents:
diff changeset
189 set_top(top);
a61af66fc99e Initial load
duke
parents:
diff changeset
190 set_pf_top(top);
a61af66fc99e Initial load
duke
parents:
diff changeset
191 set_end(end);
a61af66fc99e Initial load
duke
parents:
diff changeset
192 invariants();
a61af66fc99e Initial load
duke
parents:
diff changeset
193 }
a61af66fc99e Initial load
duke
parents:
diff changeset
194
a61af66fc99e Initial load
duke
parents:
diff changeset
195 void ThreadLocalAllocBuffer::initialize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
196 initialize(NULL, // start
a61af66fc99e Initial load
duke
parents:
diff changeset
197 NULL, // top
a61af66fc99e Initial load
duke
parents:
diff changeset
198 NULL); // end
a61af66fc99e Initial load
duke
parents:
diff changeset
199
a61af66fc99e Initial load
duke
parents:
diff changeset
200 set_desired_size(initial_desired_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
201
a61af66fc99e Initial load
duke
parents:
diff changeset
202 // Following check is needed because at startup the main (primordial)
a61af66fc99e Initial load
duke
parents:
diff changeset
203 // thread is initialized before the heap is. The initialization for
a61af66fc99e Initial load
duke
parents:
diff changeset
204 // this thread is redone in startup_initialization below.
a61af66fc99e Initial load
duke
parents:
diff changeset
205 if (Universe::heap() != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
206 size_t capacity = Universe::heap()->tlab_capacity(myThread()) / HeapWordSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
207 double alloc_frac = desired_size() * target_refills() / (double) capacity;
a61af66fc99e Initial load
duke
parents:
diff changeset
208 _allocation_fraction.sample(alloc_frac);
a61af66fc99e Initial load
duke
parents:
diff changeset
209 }
a61af66fc99e Initial load
duke
parents:
diff changeset
210
a61af66fc99e Initial load
duke
parents:
diff changeset
211 set_refill_waste_limit(initial_refill_waste_limit());
a61af66fc99e Initial load
duke
parents:
diff changeset
212
a61af66fc99e Initial load
duke
parents:
diff changeset
213 initialize_statistics();
a61af66fc99e Initial load
duke
parents:
diff changeset
214 }
a61af66fc99e Initial load
duke
parents:
diff changeset
215
a61af66fc99e Initial load
duke
parents:
diff changeset
216 void ThreadLocalAllocBuffer::startup_initialization() {
a61af66fc99e Initial load
duke
parents:
diff changeset
217
a61af66fc99e Initial load
duke
parents:
diff changeset
218 // Assuming each thread's active tlab is, on average,
a61af66fc99e Initial load
duke
parents:
diff changeset
219 // 1/2 full at a GC
a61af66fc99e Initial load
duke
parents:
diff changeset
220 _target_refills = 100 / (2 * TLABWasteTargetPercent);
a61af66fc99e Initial load
duke
parents:
diff changeset
221 _target_refills = MAX2(_target_refills, (unsigned)1U);
a61af66fc99e Initial load
duke
parents:
diff changeset
222
a61af66fc99e Initial load
duke
parents:
diff changeset
223 _global_stats = new GlobalTLABStats();
a61af66fc99e Initial load
duke
parents:
diff changeset
224
a61af66fc99e Initial load
duke
parents:
diff changeset
225 // During jvm startup, the main (primordial) thread is initialized
a61af66fc99e Initial load
duke
parents:
diff changeset
226 // before the heap is initialized. So reinitialize it now.
a61af66fc99e Initial load
duke
parents:
diff changeset
227 guarantee(Thread::current()->is_Java_thread(), "tlab initialization thread not Java thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
228 Thread::current()->tlab().initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
229
a61af66fc99e Initial load
duke
parents:
diff changeset
230 if (PrintTLAB && Verbose) {
a61af66fc99e Initial load
duke
parents:
diff changeset
231 gclog_or_tty->print("TLAB min: " SIZE_FORMAT " initial: " SIZE_FORMAT " max: " SIZE_FORMAT "\n",
a61af66fc99e Initial load
duke
parents:
diff changeset
232 min_size(), Thread::current()->tlab().initial_desired_size(), max_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
233 }
a61af66fc99e Initial load
duke
parents:
diff changeset
234 }
a61af66fc99e Initial load
duke
parents:
diff changeset
235
a61af66fc99e Initial load
duke
parents:
diff changeset
236 size_t ThreadLocalAllocBuffer::initial_desired_size() {
a61af66fc99e Initial load
duke
parents:
diff changeset
237 size_t init_sz;
a61af66fc99e Initial load
duke
parents:
diff changeset
238
a61af66fc99e Initial load
duke
parents:
diff changeset
239 if (TLABSize > 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
240 init_sz = MIN2(TLABSize / HeapWordSize, max_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
241 } else if (global_stats() == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
242 // Startup issue - main thread initialized before heap initialized.
a61af66fc99e Initial load
duke
parents:
diff changeset
243 init_sz = min_size();
a61af66fc99e Initial load
duke
parents:
diff changeset
244 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
245 // Initial size is a function of the average number of allocating threads.
a61af66fc99e Initial load
duke
parents:
diff changeset
246 unsigned nof_threads = global_stats()->allocating_threads_avg();
a61af66fc99e Initial load
duke
parents:
diff changeset
247
a61af66fc99e Initial load
duke
parents:
diff changeset
248 init_sz = (Universe::heap()->tlab_capacity(myThread()) / HeapWordSize) /
a61af66fc99e Initial load
duke
parents:
diff changeset
249 (nof_threads * target_refills());
a61af66fc99e Initial load
duke
parents:
diff changeset
250 init_sz = align_object_size(init_sz);
a61af66fc99e Initial load
duke
parents:
diff changeset
251 init_sz = MIN2(MAX2(init_sz, min_size()), max_size());
a61af66fc99e Initial load
duke
parents:
diff changeset
252 }
a61af66fc99e Initial load
duke
parents:
diff changeset
253 return init_sz;
a61af66fc99e Initial load
duke
parents:
diff changeset
254 }
a61af66fc99e Initial load
duke
parents:
diff changeset
255
a61af66fc99e Initial load
duke
parents:
diff changeset
256 void ThreadLocalAllocBuffer::print_stats(const char* tag) {
a61af66fc99e Initial load
duke
parents:
diff changeset
257 Thread* thrd = myThread();
a61af66fc99e Initial load
duke
parents:
diff changeset
258 size_t waste = _gc_waste + _slow_refill_waste + _fast_refill_waste;
a61af66fc99e Initial load
duke
parents:
diff changeset
259 size_t alloc = _number_of_refills * _desired_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
260 double waste_percent = alloc == 0 ? 0.0 :
a61af66fc99e Initial load
duke
parents:
diff changeset
261 100.0 * waste / alloc;
14310
1e1c8d358b52 8030177: G1: Enable TLAB resizing
brutisso
parents: 7180
diff changeset
262 size_t tlab_used = Universe::heap()->tlab_used(thrd);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
263 gclog_or_tty->print("TLAB: %s thread: " INTPTR_FORMAT " [id: %2d]"
a61af66fc99e Initial load
duke
parents:
diff changeset
264 " desired_size: " SIZE_FORMAT "KB"
a61af66fc99e Initial load
duke
parents:
diff changeset
265 " slow allocs: %d refill waste: " SIZE_FORMAT "B"
a61af66fc99e Initial load
duke
parents:
diff changeset
266 " alloc:%8.5f %8.0fKB refills: %d waste %4.1f%% gc: %dB"
a61af66fc99e Initial load
duke
parents:
diff changeset
267 " slow: %dB fast: %dB\n",
a61af66fc99e Initial load
duke
parents:
diff changeset
268 tag, thrd, thrd->osthread()->thread_id(),
a61af66fc99e Initial load
duke
parents:
diff changeset
269 _desired_size / (K / HeapWordSize),
a61af66fc99e Initial load
duke
parents:
diff changeset
270 _slow_allocations, _refill_waste_limit * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
271 _allocation_fraction.average(),
a61af66fc99e Initial load
duke
parents:
diff changeset
272 _allocation_fraction.average() * tlab_used / K,
a61af66fc99e Initial load
duke
parents:
diff changeset
273 _number_of_refills, waste_percent,
a61af66fc99e Initial load
duke
parents:
diff changeset
274 _gc_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
275 _slow_refill_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
276 _fast_refill_waste * HeapWordSize);
a61af66fc99e Initial load
duke
parents:
diff changeset
277 }
a61af66fc99e Initial load
duke
parents:
diff changeset
278
a61af66fc99e Initial load
duke
parents:
diff changeset
279 void ThreadLocalAllocBuffer::verify() {
a61af66fc99e Initial load
duke
parents:
diff changeset
280 HeapWord* p = start();
a61af66fc99e Initial load
duke
parents:
diff changeset
281 HeapWord* t = top();
a61af66fc99e Initial load
duke
parents:
diff changeset
282 HeapWord* prev_p = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
283 while (p < t) {
a61af66fc99e Initial load
duke
parents:
diff changeset
284 oop(p)->verify();
a61af66fc99e Initial load
duke
parents:
diff changeset
285 prev_p = p;
a61af66fc99e Initial load
duke
parents:
diff changeset
286 p += oop(p)->size();
a61af66fc99e Initial load
duke
parents:
diff changeset
287 }
a61af66fc99e Initial load
duke
parents:
diff changeset
288 guarantee(p == top(), "end of last object must match end of space");
a61af66fc99e Initial load
duke
parents:
diff changeset
289 }
a61af66fc99e Initial load
duke
parents:
diff changeset
290
a61af66fc99e Initial load
duke
parents:
diff changeset
291 Thread* ThreadLocalAllocBuffer::myThread() {
a61af66fc99e Initial load
duke
parents:
diff changeset
292 return (Thread*)(((char *)this) +
a61af66fc99e Initial load
duke
parents:
diff changeset
293 in_bytes(start_offset()) -
a61af66fc99e Initial load
duke
parents:
diff changeset
294 in_bytes(Thread::tlab_start_offset()));
a61af66fc99e Initial load
duke
parents:
diff changeset
295 }
a61af66fc99e Initial load
duke
parents:
diff changeset
296
a61af66fc99e Initial load
duke
parents:
diff changeset
297
a61af66fc99e Initial load
duke
parents:
diff changeset
298 GlobalTLABStats::GlobalTLABStats() :
a61af66fc99e Initial load
duke
parents:
diff changeset
299 _allocating_threads_avg(TLABAllocationWeight) {
a61af66fc99e Initial load
duke
parents:
diff changeset
300
a61af66fc99e Initial load
duke
parents:
diff changeset
301 initialize();
a61af66fc99e Initial load
duke
parents:
diff changeset
302
a61af66fc99e Initial load
duke
parents:
diff changeset
303 _allocating_threads_avg.sample(1); // One allocating thread at startup
a61af66fc99e Initial load
duke
parents:
diff changeset
304
a61af66fc99e Initial load
duke
parents:
diff changeset
305 if (UsePerfData) {
a61af66fc99e Initial load
duke
parents:
diff changeset
306
a61af66fc99e Initial load
duke
parents:
diff changeset
307 EXCEPTION_MARK;
a61af66fc99e Initial load
duke
parents:
diff changeset
308 ResourceMark rm;
a61af66fc99e Initial load
duke
parents:
diff changeset
309
a61af66fc99e Initial load
duke
parents:
diff changeset
310 char* cname = PerfDataManager::counter_name("tlab", "allocThreads");
a61af66fc99e Initial load
duke
parents:
diff changeset
311 _perf_allocating_threads =
a61af66fc99e Initial load
duke
parents:
diff changeset
312 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
313
a61af66fc99e Initial load
duke
parents:
diff changeset
314 cname = PerfDataManager::counter_name("tlab", "fills");
a61af66fc99e Initial load
duke
parents:
diff changeset
315 _perf_total_refills =
a61af66fc99e Initial load
duke
parents:
diff changeset
316 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
317
a61af66fc99e Initial load
duke
parents:
diff changeset
318 cname = PerfDataManager::counter_name("tlab", "maxFills");
a61af66fc99e Initial load
duke
parents:
diff changeset
319 _perf_max_refills =
a61af66fc99e Initial load
duke
parents:
diff changeset
320 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
321
a61af66fc99e Initial load
duke
parents:
diff changeset
322 cname = PerfDataManager::counter_name("tlab", "alloc");
a61af66fc99e Initial load
duke
parents:
diff changeset
323 _perf_allocation =
a61af66fc99e Initial load
duke
parents:
diff changeset
324 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
325
a61af66fc99e Initial load
duke
parents:
diff changeset
326 cname = PerfDataManager::counter_name("tlab", "gcWaste");
a61af66fc99e Initial load
duke
parents:
diff changeset
327 _perf_gc_waste =
a61af66fc99e Initial load
duke
parents:
diff changeset
328 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
329
a61af66fc99e Initial load
duke
parents:
diff changeset
330 cname = PerfDataManager::counter_name("tlab", "maxGcWaste");
a61af66fc99e Initial load
duke
parents:
diff changeset
331 _perf_max_gc_waste =
a61af66fc99e Initial load
duke
parents:
diff changeset
332 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
333
a61af66fc99e Initial load
duke
parents:
diff changeset
334 cname = PerfDataManager::counter_name("tlab", "slowWaste");
a61af66fc99e Initial load
duke
parents:
diff changeset
335 _perf_slow_refill_waste =
a61af66fc99e Initial load
duke
parents:
diff changeset
336 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
337
a61af66fc99e Initial load
duke
parents:
diff changeset
338 cname = PerfDataManager::counter_name("tlab", "maxSlowWaste");
a61af66fc99e Initial load
duke
parents:
diff changeset
339 _perf_max_slow_refill_waste =
a61af66fc99e Initial load
duke
parents:
diff changeset
340 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
341
a61af66fc99e Initial load
duke
parents:
diff changeset
342 cname = PerfDataManager::counter_name("tlab", "fastWaste");
a61af66fc99e Initial load
duke
parents:
diff changeset
343 _perf_fast_refill_waste =
a61af66fc99e Initial load
duke
parents:
diff changeset
344 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
345
a61af66fc99e Initial load
duke
parents:
diff changeset
346 cname = PerfDataManager::counter_name("tlab", "maxFastWaste");
a61af66fc99e Initial load
duke
parents:
diff changeset
347 _perf_max_fast_refill_waste =
a61af66fc99e Initial load
duke
parents:
diff changeset
348 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
349
a61af66fc99e Initial load
duke
parents:
diff changeset
350 cname = PerfDataManager::counter_name("tlab", "slowAlloc");
a61af66fc99e Initial load
duke
parents:
diff changeset
351 _perf_slow_allocations =
a61af66fc99e Initial load
duke
parents:
diff changeset
352 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
353
a61af66fc99e Initial load
duke
parents:
diff changeset
354 cname = PerfDataManager::counter_name("tlab", "maxSlowAlloc");
a61af66fc99e Initial load
duke
parents:
diff changeset
355 _perf_max_slow_allocations =
a61af66fc99e Initial load
duke
parents:
diff changeset
356 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK);
a61af66fc99e Initial load
duke
parents:
diff changeset
357 }
a61af66fc99e Initial load
duke
parents:
diff changeset
358 }
a61af66fc99e Initial load
duke
parents:
diff changeset
359
a61af66fc99e Initial load
duke
parents:
diff changeset
360 void GlobalTLABStats::initialize() {
a61af66fc99e Initial load
duke
parents:
diff changeset
361 // Clear counters summarizing info from all threads
a61af66fc99e Initial load
duke
parents:
diff changeset
362 _allocating_threads = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
363 _total_refills = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
364 _max_refills = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
365 _total_allocation = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
366 _total_gc_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
367 _max_gc_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
368 _total_slow_refill_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
369 _max_slow_refill_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
370 _total_fast_refill_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
371 _max_fast_refill_waste = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
372 _total_slow_allocations = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
373 _max_slow_allocations = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
374 }
a61af66fc99e Initial load
duke
parents:
diff changeset
375
a61af66fc99e Initial load
duke
parents:
diff changeset
376 void GlobalTLABStats::publish() {
a61af66fc99e Initial load
duke
parents:
diff changeset
377 _allocating_threads_avg.sample(_allocating_threads);
a61af66fc99e Initial load
duke
parents:
diff changeset
378 if (UsePerfData) {
a61af66fc99e Initial load
duke
parents:
diff changeset
379 _perf_allocating_threads ->set_value(_allocating_threads);
a61af66fc99e Initial load
duke
parents:
diff changeset
380 _perf_total_refills ->set_value(_total_refills);
a61af66fc99e Initial load
duke
parents:
diff changeset
381 _perf_max_refills ->set_value(_max_refills);
a61af66fc99e Initial load
duke
parents:
diff changeset
382 _perf_allocation ->set_value(_total_allocation);
a61af66fc99e Initial load
duke
parents:
diff changeset
383 _perf_gc_waste ->set_value(_total_gc_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
384 _perf_max_gc_waste ->set_value(_max_gc_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
385 _perf_slow_refill_waste ->set_value(_total_slow_refill_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
386 _perf_max_slow_refill_waste->set_value(_max_slow_refill_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
387 _perf_fast_refill_waste ->set_value(_total_fast_refill_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
388 _perf_max_fast_refill_waste->set_value(_max_fast_refill_waste);
a61af66fc99e Initial load
duke
parents:
diff changeset
389 _perf_slow_allocations ->set_value(_total_slow_allocations);
a61af66fc99e Initial load
duke
parents:
diff changeset
390 _perf_max_slow_allocations ->set_value(_max_slow_allocations);
a61af66fc99e Initial load
duke
parents:
diff changeset
391 }
a61af66fc99e Initial load
duke
parents:
diff changeset
392 }
a61af66fc99e Initial load
duke
parents:
diff changeset
393
a61af66fc99e Initial load
duke
parents:
diff changeset
394 void GlobalTLABStats::print() {
a61af66fc99e Initial load
duke
parents:
diff changeset
395 size_t waste = _total_gc_waste + _total_slow_refill_waste + _total_fast_refill_waste;
a61af66fc99e Initial load
duke
parents:
diff changeset
396 double waste_percent = _total_allocation == 0 ? 0.0 :
a61af66fc99e Initial load
duke
parents:
diff changeset
397 100.0 * waste / _total_allocation;
a61af66fc99e Initial load
duke
parents:
diff changeset
398 gclog_or_tty->print("TLAB totals: thrds: %d refills: %d max: %d"
a61af66fc99e Initial load
duke
parents:
diff changeset
399 " slow allocs: %d max %d waste: %4.1f%%"
a61af66fc99e Initial load
duke
parents:
diff changeset
400 " gc: " SIZE_FORMAT "B max: " SIZE_FORMAT "B"
a61af66fc99e Initial load
duke
parents:
diff changeset
401 " slow: " SIZE_FORMAT "B max: " SIZE_FORMAT "B"
a61af66fc99e Initial load
duke
parents:
diff changeset
402 " fast: " SIZE_FORMAT "B max: " SIZE_FORMAT "B\n",
a61af66fc99e Initial load
duke
parents:
diff changeset
403 _allocating_threads,
a61af66fc99e Initial load
duke
parents:
diff changeset
404 _total_refills, _max_refills,
a61af66fc99e Initial load
duke
parents:
diff changeset
405 _total_slow_allocations, _max_slow_allocations,
a61af66fc99e Initial load
duke
parents:
diff changeset
406 waste_percent,
a61af66fc99e Initial load
duke
parents:
diff changeset
407 _total_gc_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
408 _max_gc_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
409 _total_slow_refill_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
410 _max_slow_refill_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
411 _total_fast_refill_waste * HeapWordSize,
a61af66fc99e Initial load
duke
parents:
diff changeset
412 _max_fast_refill_waste * HeapWordSize);
a61af66fc99e Initial load
duke
parents:
diff changeset
413 }