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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
|
/* Copyright (C) 2006 MySQL AB
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 Street, Fifth Floor, Boston, MA 02111-1301 USA */
/*
lockman for row locks, tablockman for table locks
*/
/* #define EXTRA_VERBOSE */
#include <tap.h>
#include <my_global.h>
#include <my_sys.h>
#include <my_atomic.h>
#include <lf.h>
#include "../lockman.h"
#include "../tablockman.h"
#define Nlos 100
#define Ntbls 10
LOCK_OWNER loarray[Nlos];
TABLE_LOCK_OWNER loarray1[Nlos];
pthread_mutex_t mutexes[Nlos];
pthread_cond_t conds[Nlos];
LOCKED_TABLE ltarray[Ntbls];
LOCKMAN lockman;
TABLOCKMAN tablockman;
#ifndef EXTRA_VERBOSE
#define print_lo1(X) /* no-op */
#define DIAG(X) /* no-op */
#else
#define DIAG(X) diag X
#endif
LOCK_OWNER *loid2lo(uint16 loid)
{
return loarray+loid-1;
}
TABLE_LOCK_OWNER *loid2lo1(uint16 loid)
{
return loarray1+loid-1;
}
#define unlock_all(O) diag("lo" #O "> release all locks"); \
tablockman_release_locks(&tablockman, loid2lo1(O));
#define test_lock(O, R, L, S, RES) \
ok(tablockman_getlock(&tablockman, loid2lo1(O), <array[R], L) == RES, \
"lo" #O "> " S "lock resource " #R " with " #L "-lock"); \
print_lo1(loid2lo1(O));
#define lock_ok_a(O, R, L) \
test_lock(O, R, L, "", GOT_THE_LOCK)
#define lock_ok_i(O, R, L) \
test_lock(O, R, L, "", GOT_THE_LOCK_NEED_TO_LOCK_A_SUBRESOURCE)
#define lock_ok_l(O, R, L) \
test_lock(O, R, L, "", GOT_THE_LOCK_NEED_TO_INSTANT_LOCK_A_SUBRESOURCE)
#define lock_conflict(O, R, L) \
test_lock(O, R, L, "cannot ", LOCK_TIMEOUT);
void test_tablockman_simple()
{
/* simple */
lock_ok_a(1, 1, S);
lock_ok_i(2, 2, IS);
lock_ok_i(1, 2, IX);
/* lock escalation */
lock_ok_a(1, 1, X);
lock_ok_i(2, 2, IX);
/* failures */
lock_conflict(2, 1, X);
unlock_all(2);
lock_ok_a(1, 2, S);
lock_ok_a(1, 2, IS);
lock_ok_a(1, 2, LS);
lock_ok_i(1, 3, IX);
lock_ok_a(2, 3, LS);
lock_ok_i(1, 3, IX);
lock_ok_l(2, 3, IS);
unlock_all(1);
unlock_all(2);
lock_ok_i(1, 1, IX);
lock_conflict(2, 1, S);
lock_ok_a(1, 1, LS);
unlock_all(1);
unlock_all(2);
lock_ok_i(1, 1, IX);
lock_ok_a(2, 1, LS);
lock_ok_a(1, 1, LS);
lock_ok_i(1, 1, IX);
lock_ok_i(3, 1, IS);
unlock_all(1);
unlock_all(2);
unlock_all(3);
lock_ok_i(1, 4, IS);
lock_ok_i(2, 4, IS);
lock_ok_i(3, 4, IS);
lock_ok_a(3, 4, LS);
lock_ok_i(4, 4, IS);
lock_conflict(4, 4, IX);
lock_conflict(2, 4, IX);
lock_ok_a(1, 4, LS);
unlock_all(1);
unlock_all(2);
unlock_all(3);
unlock_all(4);
lock_ok_i(1, 1, IX);
lock_ok_i(2, 1, IX);
lock_conflict(1, 1, S);
lock_conflict(2, 1, X);
unlock_all(1);
unlock_all(2);
}
int rt_num_threads;
int litmus;
int thread_number= 0, timeouts= 0;
void run_test(const char *test, pthread_handler handler, int n, int m)
{
pthread_t *threads;
ulonglong now= my_getsystime();
int i;
thread_number= timeouts= 0;
litmus= 0;
threads= (pthread_t *)my_malloc(sizeof(void *)*n, MYF(0));
if (!threads)
{
diag("Out of memory");
abort();
}
diag("Running %s with %d threads, %d iterations... ", test, n, m);
rt_num_threads= n;
for (i= 0; i < n ; i++)
if (pthread_create(threads+i, 0, handler, &m))
{
diag("Could not create thread");
abort();
}
for (i= 0 ; i < n ; i++)
pthread_join(threads[i], 0);
now= my_getsystime()-now;
ok(litmus == 0, "Finished %s in %g secs (%d)", test, ((double)now)/1e7, litmus);
my_free((void*)threads, MYF(0));
}
pthread_mutex_t rt_mutex;
int Nrows= 100;
int Ntables= 10;
int table_lock_ratio= 10;
enum lockman_lock_type lock_array[6]= {S, X, LS, LX, IS, IX};
char *lock2str[6]= {"S", "X", "LS", "LX", "IS", "IX"};
char *res2str[]= {
"DIDN'T GET THE LOCK",
"OUT OF MEMORY",
"DEADLOCK",
"LOCK TIMEOUT",
"GOT THE LOCK",
"GOT THE LOCK NEED TO LOCK A SUBRESOURCE",
"GOT THE LOCK NEED TO INSTANT LOCK A SUBRESOURCE"};
pthread_handler_t test_lockman(void *arg)
{
int m= (*(int *)arg);
uint x, loid, row, table, res, locklevel, timeout= 0;
LOCK_OWNER *lo; TABLE_LOCK_OWNER *lo1; DBUG_ASSERT(Ntables <= Ntbls);
pthread_mutex_lock(&rt_mutex);
loid= ++thread_number;
pthread_mutex_unlock(&rt_mutex);
lo= loid2lo(loid); lo1= loid2lo1(loid);
for (x= ((int)(intptr)(&m)); m > 0; m--)
{
x= (x*3628273133 + 1500450271) % 9576890767; /* three prime numbers */
row= x % Nrows + Ntables;
table= row % Ntables;
locklevel= (x/Nrows) & 3;
if (table_lock_ratio && (x/Nrows/4) % table_lock_ratio == 0)
{ /* table lock */
res= tablockman_getlock(&tablockman, lo1, ltarray+table, lock_array[locklevel]);
DIAG(("loid %2d, table %d, lock %s, res %s", loid, table,
lock2str[locklevel], res2str[res]));
if (res < GOT_THE_LOCK)
{
lockman_release_locks(&lockman, lo); tablockman_release_locks(&tablockman, lo1);
DIAG(("loid %2d, release all locks", loid));
timeout++;
continue;
}
DBUG_ASSERT(res == GOT_THE_LOCK);
}
else
{ /* row lock */
locklevel&= 1;
res= tablockman_getlock(&tablockman, lo1, ltarray+table, lock_array[locklevel + 4]);
DIAG(("loid %2d, row %d, lock %s, res %s", loid, row,
lock2str[locklevel+4], res2str[res]));
switch (res)
{
case GOT_THE_LOCK:
continue;
case GOT_THE_LOCK_NEED_TO_INSTANT_LOCK_A_SUBRESOURCE:
/* not implemented, so take a regular lock */
case GOT_THE_LOCK_NEED_TO_LOCK_A_SUBRESOURCE:
res= lockman_getlock(&lockman, lo, row, lock_array[locklevel]);
DIAG(("loid %2d, ROW %d, lock %s, res %s", loid, row,
lock2str[locklevel], res2str[res]));
if (res == DIDNT_GET_THE_LOCK)
{
lockman_release_locks(&lockman, lo);
tablockman_release_locks(&tablockman, lo1);
DIAG(("loid %2d, release all locks", loid));
timeout++;
continue;
}
DBUG_ASSERT(res == GOT_THE_LOCK);
continue;
default:
lockman_release_locks(&lockman, lo); tablockman_release_locks(&tablockman, lo1);
DIAG(("loid %2d, release all locks", loid));
timeout++;
continue;
}
}
}
lockman_release_locks(&lockman, lo);
tablockman_release_locks(&tablockman, lo1);
pthread_mutex_lock(&rt_mutex);
rt_num_threads--;
timeouts+= timeout;
if (!rt_num_threads)
diag("number of timeouts: %d", timeouts);
pthread_mutex_unlock(&rt_mutex);
return 0;
}
int main()
{
int i;
my_init();
pthread_mutex_init(&rt_mutex, 0);
plan(35);
lockman_init(&lockman, &loid2lo, 50);
tablockman_init(&tablockman, &loid2lo1, 50);
for (i= 0; i < Nlos; i++)
{
pthread_mutex_init(&mutexes[i], MY_MUTEX_INIT_FAST);
pthread_cond_init (&conds[i], 0);
loarray[i].pins= lf_alloc_get_pins(&lockman.alloc);
loarray[i].all_locks= 0;
loarray[i].waiting_for= 0;
loarray[i].mutex= &mutexes[i];
loarray[i].cond= &conds[i];
loarray[i].loid= i+1;
loarray1[i].active_locks= 0;
loarray1[i].waiting_lock= 0;
loarray1[i].waiting_for= 0;
loarray1[i].mutex= &mutexes[i];
loarray1[i].cond= &conds[i];
loarray1[i].loid= i+1;
}
for (i= 0; i < Ntbls; i++)
{
tablockman_init_locked_table(ltarray+i, Nlos);
}
test_tablockman_simple();
#define CYCLES 10000
#define THREADS Nlos /* don't change this line */
/* mixed load, stress-test with random locks */
Nrows= 100;
Ntables= 10;
table_lock_ratio= 10;
run_test("\"random lock\" stress test", test_lockman, THREADS, CYCLES);
/* "real-life" simulation - many rows, no table locks */
Nrows= 1000000;
Ntables= 10;
table_lock_ratio= 0;
run_test("\"real-life\" simulation test", test_lockman, THREADS, CYCLES*10);
for (i= 0; i < Nlos; i++)
{
lockman_release_locks(&lockman, &loarray[i]);
pthread_mutex_destroy(loarray[i].mutex);
pthread_cond_destroy(loarray[i].cond);
lf_pinbox_put_pins(loarray[i].pins);
}
{
ulonglong now= my_getsystime();
lockman_destroy(&lockman);
now= my_getsystime()-now;
diag("lockman_destroy: %g secs", ((double)now)/1e7);
}
pthread_mutex_destroy(&rt_mutex);
my_end(0);
return exit_status();
}
|