1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/* Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "thr_template.c"
volatile uint32 b32;
volatile int32 c32;
my_atomic_rwlock_t rwl;
/* add and sub a random number in a loop. Must get 0 at the end */
pthread_handler_t test_atomic_add(void *arg)
{
int m= (*(int *)arg)/2;
int32 x;
for (x= ((int)(intptr)(&m)); m ; m--)
{
x= (x*m+0x87654321) & INT_MAX32;
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&bad, x);
my_atomic_rwlock_wrunlock(&rwl);
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&bad, -x);
my_atomic_rwlock_wrunlock(&rwl);
}
pthread_mutex_lock(&mutex);
if (!--running_threads) pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
volatile int64 a64;
/* add and sub a random number in a loop. Must get 0 at the end */
pthread_handler_t test_atomic_add64(void *arg)
{
int m= (*(int *)arg)/2;
int64 x;
for (x= ((int64)(intptr)(&m)); m ; m--)
{
x= (x*m+0xfdecba987654321LL) & INT_MAX64;
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add64(&a64, x);
my_atomic_rwlock_wrunlock(&rwl);
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add64(&a64, -x);
my_atomic_rwlock_wrunlock(&rwl);
}
pthread_mutex_lock(&mutex);
if (!--running_threads)
{
bad= (a64 != 0);
pthread_cond_signal(&cond);
}
pthread_mutex_unlock(&mutex);
return 0;
}
/*
1. generate thread number 0..N-1 from b32
2. add it to bad
3. swap thread numbers in c32
4. (optionally) one more swap to avoid 0 as a result
5. subtract result from bad
must get 0 in bad at the end
*/
pthread_handler_t test_atomic_fas(void *arg)
{
int m= *(int *)arg;
int32 x;
my_atomic_rwlock_wrlock(&rwl);
x= my_atomic_add32(&b32, 1);
my_atomic_rwlock_wrunlock(&rwl);
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&bad, x);
my_atomic_rwlock_wrunlock(&rwl);
for (; m ; m--)
{
my_atomic_rwlock_wrlock(&rwl);
x= my_atomic_fas32(&c32, x);
my_atomic_rwlock_wrunlock(&rwl);
}
if (!x)
{
my_atomic_rwlock_wrlock(&rwl);
x= my_atomic_fas32(&c32, x);
my_atomic_rwlock_wrunlock(&rwl);
}
my_atomic_rwlock_wrlock(&rwl);
my_atomic_add32(&bad, -x);
my_atomic_rwlock_wrunlock(&rwl);
pthread_mutex_lock(&mutex);
if (!--running_threads) pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
/*
same as test_atomic_add, but my_atomic_add32 is emulated with
my_atomic_cas32 - notice that the slowdown is proportional to the
number of CPUs
*/
pthread_handler_t test_atomic_cas(void *arg)
{
int m= (*(int *)arg)/2, ok= 0;
int32 x, y;
for (x= ((int)(intptr)(&m)); m ; m--)
{
my_atomic_rwlock_wrlock(&rwl);
y= my_atomic_load32(&bad);
my_atomic_rwlock_wrunlock(&rwl);
x= (x*m+0x87654321) & INT_MAX32;
do {
my_atomic_rwlock_wrlock(&rwl);
ok= my_atomic_cas32(&bad, &y, (uint32)y+x);
my_atomic_rwlock_wrunlock(&rwl);
} while (!ok) ;
do {
my_atomic_rwlock_wrlock(&rwl);
ok= my_atomic_cas32(&bad, &y, y-x);
my_atomic_rwlock_wrunlock(&rwl);
} while (!ok) ;
}
pthread_mutex_lock(&mutex);
if (!--running_threads) pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
return 0;
}
void do_tests()
{
plan(6);
bad= my_atomic_initialize();
ok(!bad, "my_atomic_initialize() returned %d", bad);
my_atomic_rwlock_init(&rwl);
b32= c32= 0;
test_concurrently("my_atomic_add32", test_atomic_add, THREADS, CYCLES);
b32= c32= 0;
test_concurrently("my_atomic_fas32", test_atomic_fas, THREADS, CYCLES);
b32= c32= 0;
test_concurrently("my_atomic_cas32", test_atomic_cas, THREADS, CYCLES);
{
/*
If b is not volatile, the wrong assembly code is generated on OSX Lion
as the variable is optimized away as a constant.
See Bug#62533 / Bug#13030056.
Another workaround is to specify architecture explicitly using e.g.
CFLAGS/CXXFLAGS= "-m64".
*/
volatile int64 b=0x1000200030004000LL;
a64=0;
my_atomic_add64(&a64, b);
ok(a64==b, "add64");
}
a64=0;
test_concurrently("my_atomic_add64", test_atomic_add64, THREADS, CYCLES);
my_atomic_rwlock_destroy(&rwl);
}
|
