Commit | Line | Data |
---|---|---|
b257a10b MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6982d6d7 | 6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
b257a10b | 7 | * |
af02d47e MD |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
b257a10b MD |
21 | */ |
22 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
d8540fc5 | 24 | #include "../config.h" |
ac260fd9 | 25 | #include <stdio.h> |
f69f195a MD |
26 | #include <pthread.h> |
27 | #include <stdlib.h> | |
41718ff9 | 28 | #include <string.h> |
f69f195a MD |
29 | #include <sys/types.h> |
30 | #include <sys/wait.h> | |
31 | #include <unistd.h> | |
32 | #include <stdio.h> | |
41718ff9 | 33 | #include <assert.h> |
9e97e478 | 34 | #include <sched.h> |
94b343fd | 35 | #include <errno.h> |
87bd15cd | 36 | |
ec4e58a3 | 37 | #include <urcu/arch.h> |
7685d963 | 38 | |
65fcc7e9 MD |
39 | #ifdef __linux__ |
40 | #include <syscall.h> | |
41 | #endif | |
42 | ||
2a7ac59d MD |
43 | /* hardcoded number of CPUs */ |
44 | #define NR_CPUS 16384 | |
45 | ||
87bd15cd BW |
46 | #if defined(_syscall0) |
47 | _syscall0(pid_t, gettid) | |
48 | #elif defined(__NR_gettid) | |
49 | static inline pid_t gettid(void) | |
50 | { | |
51 | return syscall(__NR_gettid); | |
52 | } | |
53 | #else | |
54 | #warning "use pid as tid" | |
55 | static inline pid_t gettid(void) | |
56 | { | |
57 | return getpid(); | |
58 | } | |
59 | #endif | |
60 | ||
121a5d44 MD |
61 | #ifndef DYNAMIC_LINK_TEST |
62 | #define _LGPL_SOURCE | |
63 | #else | |
64 | #define debug_yield_read() | |
65 | #endif | |
ec4e58a3 | 66 | #include <urcu.h> |
ac260fd9 | 67 | |
41718ff9 MD |
68 | struct test_array { |
69 | int a; | |
41718ff9 MD |
70 | }; |
71 | ||
78efb485 | 72 | static volatile int test_go, test_stop; |
8c86b9a1 | 73 | |
9e31d0f0 | 74 | static unsigned long wdelay; |
bb488185 | 75 | |
41718ff9 MD |
76 | static struct test_array *test_rcu_pointer; |
77 | ||
cf380c2f | 78 | static unsigned long duration; |
cf380c2f | 79 | |
daddf5b0 | 80 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
81 | static unsigned long rduration; |
82 | ||
31b598e0 MD |
83 | /* write-side C.S. duration, in loops */ |
84 | static unsigned long wduration; | |
85 | ||
daddf5b0 MD |
86 | static inline void loop_sleep(unsigned long l) |
87 | { | |
88 | while(l-- != 0) | |
06f22bdb | 89 | caa_cpu_relax(); |
daddf5b0 MD |
90 | } |
91 | ||
4bad7d45 MD |
92 | static int verbose_mode; |
93 | ||
94 | #define printf_verbose(fmt, args...) \ | |
95 | do { \ | |
96 | if (verbose_mode) \ | |
97 | printf(fmt, args); \ | |
98 | } while (0) | |
99 | ||
2a7ac59d MD |
100 | static unsigned int cpu_affinities[NR_CPUS]; |
101 | static unsigned int next_aff = 0; | |
102 | static int use_affinity = 0; | |
103 | ||
104 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
105 | ||
d8540fc5 PA |
106 | #ifndef HAVE_CPU_SET_T |
107 | typedef unsigned long cpu_set_t; | |
108 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
109 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
110 | #endif | |
111 | ||
2a7ac59d MD |
112 | static void set_affinity(void) |
113 | { | |
114 | cpu_set_t mask; | |
115 | int cpu; | |
116 | int ret; | |
117 | ||
118 | if (!use_affinity) | |
119 | return; | |
120 | ||
d8540fc5 | 121 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d MD |
122 | ret = pthread_mutex_lock(&affinity_mutex); |
123 | if (ret) { | |
124 | perror("Error in pthread mutex lock"); | |
125 | exit(-1); | |
126 | } | |
127 | cpu = cpu_affinities[next_aff++]; | |
128 | ret = pthread_mutex_unlock(&affinity_mutex); | |
129 | if (ret) { | |
130 | perror("Error in pthread mutex unlock"); | |
131 | exit(-1); | |
132 | } | |
d8540fc5 | 133 | |
2a7ac59d MD |
134 | CPU_ZERO(&mask); |
135 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
136 | #if SCHED_SETAFFINITY_ARGS == 2 |
137 | sched_setaffinity(0, &mask); | |
138 | #else | |
2a7ac59d | 139 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
140 | #endif |
141 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
142 | } |
143 | ||
cf380c2f MD |
144 | /* |
145 | * returns 0 if test should end. | |
146 | */ | |
5873cd17 | 147 | static int test_duration_write(void) |
cf380c2f | 148 | { |
78efb485 | 149 | return !test_stop; |
5873cd17 MD |
150 | } |
151 | ||
152 | static int test_duration_read(void) | |
153 | { | |
78efb485 | 154 | return !test_stop; |
cf380c2f MD |
155 | } |
156 | ||
1eec319e MD |
157 | static unsigned long long __thread nr_writes; |
158 | static unsigned long long __thread nr_reads; | |
159 | ||
8c86b9a1 MD |
160 | static unsigned int nr_readers; |
161 | static unsigned int nr_writers; | |
162 | ||
c265818b MD |
163 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; |
164 | ||
165 | void rcu_copy_mutex_lock(void) | |
166 | { | |
167 | int ret; | |
168 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
169 | if (ret) { | |
170 | perror("Error in pthread mutex lock"); | |
171 | exit(-1); | |
172 | } | |
173 | } | |
174 | ||
175 | void rcu_copy_mutex_unlock(void) | |
176 | { | |
177 | int ret; | |
178 | ||
179 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
180 | if (ret) { | |
181 | perror("Error in pthread mutex unlock"); | |
182 | exit(-1); | |
183 | } | |
184 | } | |
f69f195a | 185 | |
bb488185 MD |
186 | /* |
187 | * malloc/free are reusing memory areas too quickly, which does not let us | |
188 | * test races appropriately. Use a large circular array for allocations. | |
8c86b9a1 | 189 | * ARRAY_SIZE is larger than nr_writers, which insures we never run over our tail. |
bb488185 | 190 | */ |
8c86b9a1 | 191 | #define ARRAY_SIZE (1048576 * nr_writers) |
bb488185 MD |
192 | #define ARRAY_POISON 0xDEADBEEF |
193 | static int array_index; | |
8c86b9a1 | 194 | static struct test_array *test_array; |
bb488185 MD |
195 | |
196 | static struct test_array *test_array_alloc(void) | |
197 | { | |
198 | struct test_array *ret; | |
199 | int index; | |
200 | ||
201 | rcu_copy_mutex_lock(); | |
202 | index = array_index % ARRAY_SIZE; | |
203 | assert(test_array[index].a == ARRAY_POISON || | |
204 | test_array[index].a == 0); | |
205 | ret = &test_array[index]; | |
206 | array_index++; | |
207 | if (array_index == ARRAY_SIZE) | |
208 | array_index = 0; | |
209 | rcu_copy_mutex_unlock(); | |
210 | return ret; | |
211 | } | |
212 | ||
213 | static void test_array_free(struct test_array *ptr) | |
214 | { | |
215 | if (!ptr) | |
216 | return; | |
217 | rcu_copy_mutex_lock(); | |
218 | ptr->a = ARRAY_POISON; | |
219 | rcu_copy_mutex_unlock(); | |
220 | } | |
221 | ||
1eec319e | 222 | void *thr_reader(void *_count) |
f69f195a | 223 | { |
1eec319e | 224 | unsigned long long *count = _count; |
41718ff9 MD |
225 | struct test_array *local_ptr; |
226 | ||
4bad7d45 | 227 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
87bd15cd | 228 | "reader", pthread_self(), (unsigned long)gettid()); |
f69f195a | 229 | |
2a7ac59d MD |
230 | set_affinity(); |
231 | ||
121a5d44 | 232 | rcu_register_thread(); |
f69f195a | 233 | |
8c86b9a1 MD |
234 | while (!test_go) |
235 | { | |
236 | } | |
5481ddb3 | 237 | cmm_smp_mb(); |
8c86b9a1 | 238 | |
cf380c2f | 239 | for (;;) { |
1430ee0b | 240 | rcu_read_lock(); |
cf380c2f | 241 | local_ptr = rcu_dereference(test_rcu_pointer); |
bb488185 | 242 | debug_yield_read(); |
cf380c2f MD |
243 | if (local_ptr) |
244 | assert(local_ptr->a == 8); | |
8b632bab | 245 | if (unlikely(rduration)) |
daddf5b0 | 246 | loop_sleep(rduration); |
1430ee0b | 247 | rcu_read_unlock(); |
1eec319e | 248 | nr_reads++; |
59d5a406 | 249 | if (unlikely(!test_duration_read())) |
cf380c2f | 250 | break; |
41718ff9 | 251 | } |
f69f195a | 252 | |
121a5d44 | 253 | rcu_unregister_thread(); |
41718ff9 | 254 | |
2b514ae2 MD |
255 | /* test extra thread registration */ |
256 | rcu_register_thread(); | |
257 | rcu_unregister_thread(); | |
258 | ||
1eec319e | 259 | *count = nr_reads; |
4bad7d45 | 260 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
cf380c2f | 261 | "reader", pthread_self(), (unsigned long)gettid()); |
f69f195a MD |
262 | return ((void*)1); |
263 | ||
264 | } | |
265 | ||
1eec319e | 266 | void *thr_writer(void *_count) |
f69f195a | 267 | { |
1eec319e | 268 | unsigned long long *count = _count; |
41718ff9 | 269 | struct test_array *new, *old; |
f69f195a | 270 | |
4bad7d45 | 271 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
87bd15cd | 272 | "writer", pthread_self(), (unsigned long)gettid()); |
f69f195a | 273 | |
2a7ac59d MD |
274 | set_affinity(); |
275 | ||
8c86b9a1 MD |
276 | while (!test_go) |
277 | { | |
278 | } | |
5481ddb3 | 279 | cmm_smp_mb(); |
8c86b9a1 | 280 | |
cf380c2f | 281 | for (;;) { |
bb488185 | 282 | new = test_array_alloc(); |
ad6ce6ae | 283 | new->a = 8; |
d2835e6f | 284 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
31b598e0 MD |
285 | if (unlikely(wduration)) |
286 | loop_sleep(wduration); | |
d2835e6f | 287 | synchronize_rcu(); |
cf380c2f | 288 | if (old) |
8c8eed97 | 289 | old->a = 0; |
bb488185 | 290 | test_array_free(old); |
1eec319e | 291 | nr_writes++; |
59d5a406 | 292 | if (unlikely(!test_duration_write())) |
cf380c2f | 293 | break; |
59d5a406 | 294 | if (unlikely(wdelay)) |
9e31d0f0 | 295 | loop_sleep(wdelay); |
f69f195a MD |
296 | } |
297 | ||
4bad7d45 | 298 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
cf380c2f | 299 | "writer", pthread_self(), (unsigned long)gettid()); |
1eec319e | 300 | *count = nr_writes; |
f69f195a MD |
301 | return ((void*)2); |
302 | } | |
ac260fd9 | 303 | |
1430ee0b MD |
304 | void show_usage(int argc, char **argv) |
305 | { | |
8c86b9a1 | 306 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); |
1430ee0b MD |
307 | #ifdef DEBUG_YIELD |
308 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
309 | #endif | |
7685d963 | 310 | printf(" [-d delay] (writer period (us))"); |
daddf5b0 | 311 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 312 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 313 | printf(" [-v] (verbose output)"); |
9e97e478 | 314 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
1430ee0b MD |
315 | printf("\n"); |
316 | } | |
317 | ||
cf380c2f | 318 | int main(int argc, char **argv) |
ac260fd9 | 319 | { |
f69f195a | 320 | int err; |
8c86b9a1 | 321 | pthread_t *tid_reader, *tid_writer; |
f69f195a | 322 | void *tret; |
8c86b9a1 | 323 | unsigned long long *count_reader, *count_writer; |
1eec319e | 324 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 325 | int i, a; |
f69f195a | 326 | |
8c86b9a1 MD |
327 | if (argc < 4) { |
328 | show_usage(argc, argv); | |
329 | return -1; | |
330 | } | |
331 | ||
332 | err = sscanf(argv[1], "%u", &nr_readers); | |
333 | if (err != 1) { | |
1430ee0b | 334 | show_usage(argc, argv); |
cf380c2f MD |
335 | return -1; |
336 | } | |
337 | ||
8c86b9a1 MD |
338 | err = sscanf(argv[2], "%u", &nr_writers); |
339 | if (err != 1) { | |
340 | show_usage(argc, argv); | |
341 | return -1; | |
342 | } | |
343 | ||
344 | err = sscanf(argv[3], "%lu", &duration); | |
cf380c2f | 345 | if (err != 1) { |
1430ee0b | 346 | show_usage(argc, argv); |
cf380c2f MD |
347 | return -1; |
348 | } | |
349 | ||
8c86b9a1 | 350 | for (i = 4; i < argc; i++) { |
cf380c2f MD |
351 | if (argv[i][0] != '-') |
352 | continue; | |
353 | switch (argv[i][1]) { | |
bb488185 | 354 | #ifdef DEBUG_YIELD |
cf380c2f MD |
355 | case 'r': |
356 | yield_active |= YIELD_READ; | |
357 | break; | |
358 | case 'w': | |
359 | yield_active |= YIELD_WRITE; | |
360 | break; | |
bb488185 | 361 | #endif |
9e97e478 MD |
362 | case 'a': |
363 | if (argc < i + 2) { | |
364 | show_usage(argc, argv); | |
365 | return -1; | |
366 | } | |
367 | a = atoi(argv[++i]); | |
2a7ac59d | 368 | cpu_affinities[next_aff++] = a; |
9e97e478 | 369 | use_affinity = 1; |
4bad7d45 | 370 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 371 | break; |
8b632bab MD |
372 | case 'c': |
373 | if (argc < i + 2) { | |
374 | show_usage(argc, argv); | |
375 | return -1; | |
376 | } | |
9e31d0f0 | 377 | rduration = atol(argv[++i]); |
8b632bab | 378 | break; |
8c86b9a1 | 379 | case 'd': |
7685d963 | 380 | if (argc < i + 2) { |
8c86b9a1 MD |
381 | show_usage(argc, argv); |
382 | return -1; | |
383 | } | |
9e31d0f0 | 384 | wdelay = atol(argv[++i]); |
bb488185 | 385 | break; |
31b598e0 MD |
386 | case 'e': |
387 | if (argc < i + 2) { | |
388 | show_usage(argc, argv); | |
389 | return -1; | |
390 | } | |
391 | wduration = atol(argv[++i]); | |
392 | break; | |
4bad7d45 MD |
393 | case 'v': |
394 | verbose_mode = 1; | |
395 | break; | |
cf380c2f MD |
396 | } |
397 | } | |
cf380c2f | 398 | |
4bad7d45 | 399 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
8c86b9a1 | 400 | duration, nr_readers, nr_writers); |
9e31d0f0 | 401 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
402 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
403 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
87bd15cd BW |
404 | "main", pthread_self(), (unsigned long)gettid()); |
405 | ||
92e8d9d6 | 406 | test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE); |
8c86b9a1 MD |
407 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
408 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
409 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
410 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
411 | ||
2a7ac59d MD |
412 | next_aff = 0; |
413 | ||
8c86b9a1 | 414 | for (i = 0; i < nr_readers; i++) { |
1eec319e MD |
415 | err = pthread_create(&tid_reader[i], NULL, thr_reader, |
416 | &count_reader[i]); | |
f69f195a MD |
417 | if (err != 0) |
418 | exit(1); | |
419 | } | |
8c86b9a1 | 420 | for (i = 0; i < nr_writers; i++) { |
1eec319e MD |
421 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
422 | &count_writer[i]); | |
f69f195a MD |
423 | if (err != 0) |
424 | exit(1); | |
425 | } | |
426 | ||
5481ddb3 | 427 | cmm_smp_mb(); |
8c86b9a1 | 428 | |
78efb485 MD |
429 | test_go = 1; |
430 | ||
431 | sleep(duration); | |
432 | ||
433 | test_stop = 1; | |
434 | ||
8c86b9a1 | 435 | for (i = 0; i < nr_readers; i++) { |
f69f195a MD |
436 | err = pthread_join(tid_reader[i], &tret); |
437 | if (err != 0) | |
438 | exit(1); | |
1eec319e | 439 | tot_reads += count_reader[i]; |
f69f195a | 440 | } |
8c86b9a1 | 441 | for (i = 0; i < nr_writers; i++) { |
f69f195a MD |
442 | err = pthread_join(tid_writer[i], &tret); |
443 | if (err != 0) | |
444 | exit(1); | |
1eec319e | 445 | tot_writes += count_writer[i]; |
f69f195a | 446 | } |
5873cd17 | 447 | |
4bad7d45 | 448 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
1eec319e | 449 | tot_writes); |
a50a7b43 | 450 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 451 | "nr_writers %3u " |
9e31d0f0 | 452 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 453 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
454 | nr_writers, wdelay, tot_reads, tot_writes, |
455 | tot_reads + tot_writes); | |
bb488185 | 456 | test_array_free(test_rcu_pointer); |
8c86b9a1 MD |
457 | free(test_array); |
458 | free(tid_reader); | |
459 | free(tid_writer); | |
460 | free(count_reader); | |
461 | free(count_writer); | |
f69f195a | 462 | return 0; |
ac260fd9 | 463 | } |