author | tschatzl |
Fri, 29 Nov 2019 10:20:16 +0100 | |
changeset 59320 | 11ff4e485670 |
parent 59249 | 29b0d0b61615 |
permissions | -rw-r--r-- |
53482 | 1 |
/* |
2 |
* Copyright (c) 2019, 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 |
#include "precompiled.hpp" |
|
26 |
#include "gc/g1/g1FreeIdSet.hpp" |
|
27 |
#include "memory/allocation.hpp" |
|
28 |
#include "runtime/atomic.hpp" |
|
29 |
#include "runtime/interfaceSupport.inline.hpp" |
|
30 |
#include "runtime/semaphore.inline.hpp" |
|
31 |
#include "runtime/thread.hpp" |
|
32 |
#include "utilities/debug.hpp" |
|
33 |
#include "utilities/globalDefinitions.hpp" |
|
34 |
#include "utilities/ostream.hpp" |
|
35 |
#include "threadHelper.inline.hpp" |
|
36 |
#include "unittest.hpp" |
|
37 |
||
38 |
struct G1FreeIdSet::TestSupport : AllStatic { |
|
39 |
static uint next(const G1FreeIdSet& set, uint index) { |
|
40 |
assert(index < set._size, "precondition"); |
|
41 |
return set._next[index]; |
|
42 |
} |
|
43 |
||
44 |
static uint start(const G1FreeIdSet& set) { return set._start; } |
|
45 |
static uint size(const G1FreeIdSet& set) { return set._size; } |
|
46 |
static uintx mask(const G1FreeIdSet& set) { return set._head_index_mask; } |
|
47 |
static uintx head(const G1FreeIdSet& set) { return Atomic::load(&set._head); } |
|
48 |
||
49 |
static uint head_index(const G1FreeIdSet& set, uintx head) { |
|
50 |
return set.head_index(head); |
|
51 |
} |
|
52 |
}; |
|
53 |
||
54 |
typedef G1FreeIdSet::TestSupport TestSupport; |
|
55 |
||
56 |
TEST_VM(G1FreeIdSetTest, initial_state) { |
|
57 |
const uint start = 5; |
|
58 |
const uint size = 4; |
|
59 |
G1FreeIdSet set(start, size); |
|
60 |
||
61 |
ASSERT_EQ(start, TestSupport::start(set)); |
|
62 |
ASSERT_EQ(size, TestSupport::size(set)); |
|
63 |
ASSERT_EQ(7u, TestSupport::mask(set)); |
|
64 |
ASSERT_EQ(0u, TestSupport::head(set)); |
|
65 |
for (uint i = 0; i < size; ++i) { |
|
66 |
ASSERT_EQ(i + 1, TestSupport::next(set, i)); |
|
67 |
} |
|
68 |
} |
|
69 |
||
70 |
TEST_VM(G1FreeIdSetTest, non_blocking_ops) { |
|
71 |
const uint start = 5; |
|
72 |
const uint size = 3; |
|
73 |
G1FreeIdSet set(start, size); |
|
74 |
||
75 |
ASSERT_EQ(5u, set.claim_par_id()); |
|
76 |
ASSERT_EQ(1u, TestSupport::head_index(set, TestSupport::head(set))); |
|
77 |
ASSERT_EQ(6u, set.claim_par_id()); |
|
78 |
ASSERT_EQ(2u, TestSupport::head_index(set, TestSupport::head(set))); |
|
79 |
ASSERT_EQ(7u, set.claim_par_id()); |
|
80 |
ASSERT_EQ(3u, TestSupport::head_index(set, TestSupport::head(set))); |
|
81 |
||
82 |
set.release_par_id(5u); |
|
83 |
set.release_par_id(6u); |
|
84 |
ASSERT_EQ(6u, set.claim_par_id()); |
|
85 |
ASSERT_EQ(5u, set.claim_par_id()); |
|
86 |
} |
|
87 |
||
88 |
class TestG1FreeIdSetThread : public JavaTestThread { |
|
89 |
G1FreeIdSet* _set; |
|
90 |
volatile size_t* _total_allocations; |
|
91 |
volatile bool* _continue_running; |
|
92 |
size_t _allocations; |
|
93 |
uint _thread_number; |
|
94 |
||
95 |
public: |
|
96 |
TestG1FreeIdSetThread(uint thread_number, |
|
97 |
Semaphore* post, |
|
98 |
G1FreeIdSet* set, |
|
99 |
volatile size_t* total_allocations, |
|
100 |
volatile bool* continue_running) : |
|
101 |
JavaTestThread(post), |
|
102 |
_set(set), |
|
103 |
_total_allocations(total_allocations), |
|
104 |
_continue_running(continue_running), |
|
105 |
_allocations(0), |
|
106 |
_thread_number(thread_number) |
|
107 |
{} |
|
108 |
||
109 |
virtual void main_run() { |
|
59247
56bf71d64d51
8234562: Move OrderAccess::release_store*/load_acquire to Atomic
stefank
parents:
58095
diff
changeset
|
110 |
while (Atomic::load_acquire(_continue_running)) { |
53482 | 111 |
uint id = _set->claim_par_id(); |
112 |
_set->release_par_id(id); |
|
113 |
++_allocations; |
|
114 |
ThreadBlockInVM tbiv(this); // Safepoint check. |
|
115 |
} |
|
116 |
tty->print_cr("%u allocations: " SIZE_FORMAT, _thread_number, _allocations); |
|
59249
29b0d0b61615
8234737: Harmonize parameter order in Atomic - add
stefank
parents:
59247
diff
changeset
|
117 |
Atomic::add(_total_allocations, _allocations); |
53482 | 118 |
} |
119 |
}; |
|
120 |
||
121 |
TEST_VM(G1FreeIdSetTest, stress) { |
|
122 |
const uint start = 5; |
|
123 |
const uint size = 3; |
|
124 |
const uint nthreads = size + 1; |
|
125 |
const uint milliseconds_to_run = 1000; |
|
126 |
||
127 |
Semaphore post; |
|
128 |
volatile size_t total_allocations = 0; |
|
129 |
volatile bool continue_running = true; |
|
130 |
||
131 |
G1FreeIdSet set(start, size); |
|
132 |
||
133 |
TestG1FreeIdSetThread* threads[nthreads] = {}; |
|
134 |
for (uint i = 0; i < nthreads; ++i) { |
|
135 |
threads[i] = new TestG1FreeIdSetThread(i, |
|
136 |
&post, |
|
137 |
&set, |
|
138 |
&total_allocations, |
|
139 |
&continue_running); |
|
140 |
threads[i]->doit(); |
|
141 |
} |
|
142 |
||
143 |
JavaThread* this_thread = JavaThread::current(); |
|
144 |
tty->print_cr("Stressing G1FreeIdSet for %u ms", milliseconds_to_run); |
|
145 |
{ |
|
146 |
ThreadInVMfromNative invm(this_thread); |
|
58095 | 147 |
this_thread->sleep(milliseconds_to_run); |
53482 | 148 |
} |
59247
56bf71d64d51
8234562: Move OrderAccess::release_store*/load_acquire to Atomic
stefank
parents:
58095
diff
changeset
|
149 |
Atomic::release_store(&continue_running, false); |
53482 | 150 |
for (uint i = 0; i < nthreads; ++i) { |
151 |
ThreadInVMfromNative invm(this_thread); |
|
152 |
post.wait_with_safepoint_check(this_thread); |
|
153 |
} |
|
154 |
tty->print_cr("total allocations: " SIZE_FORMAT, total_allocations); |
|
155 |
tty->print_cr("final free list: "); |
|
156 |
uint ids[size] = {}; |
|
157 |
for (uint i = 0; i < size; ++i) { |
|
158 |
uint id = set.claim_par_id(); |
|
159 |
uint index = id - TestSupport::start(set); |
|
160 |
ASSERT_LT(index, TestSupport::size(set)); |
|
161 |
tty->print_cr(" %u: %u", i, index); |
|
162 |
} |
|
163 |
ASSERT_EQ(size, TestSupport::head_index(set, TestSupport::head(set))); |
|
164 |
} |