Commit | Line | Data |
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074d8438 MD |
1 | /* |
2 | * test_urcu_assign.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6982d6d7 | 6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
074d8438 MD |
7 | * |
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. | |
21 | */ | |
22 | ||
074d8438 MD |
23 | #include <stdio.h> |
24 | #include <pthread.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/wait.h> | |
29 | #include <unistd.h> | |
30 | #include <stdio.h> | |
31 | #include <assert.h> | |
94b343fd | 32 | #include <errno.h> |
074d8438 MD |
33 | |
34 | #include <urcu/arch.h> | |
bd252a04 | 35 | #include <urcu/tls-compat.h> |
2953b501 | 36 | #include "cpuset.h" |
94df6318 | 37 | #include "thread-id.h" |
2650042a | 38 | #include "../common/debug-yield.h" |
65fcc7e9 | 39 | |
074d8438 MD |
40 | /* hardcoded number of CPUs */ |
41 | #define NR_CPUS 16384 | |
42 | ||
074d8438 MD |
43 | #ifndef DYNAMIC_LINK_TEST |
44 | #define _LGPL_SOURCE | |
074d8438 MD |
45 | #endif |
46 | #include <urcu.h> | |
47 | ||
48 | struct test_array { | |
49 | int a; | |
50 | }; | |
51 | ||
52 | static volatile int test_go, test_stop; | |
53 | ||
54 | static unsigned long wdelay; | |
55 | ||
56 | static struct test_array *test_rcu_pointer; | |
57 | ||
58 | static unsigned long duration; | |
59 | ||
60 | /* read-side C.S. duration, in loops */ | |
61 | static unsigned long rduration; | |
62 | ||
31b598e0 MD |
63 | /* write-side C.S. duration, in loops */ |
64 | static unsigned long wduration; | |
65 | ||
ab0aacbe | 66 | static inline void loop_sleep(unsigned long loops) |
074d8438 | 67 | { |
ab0aacbe | 68 | while (loops-- != 0) |
06f22bdb | 69 | caa_cpu_relax(); |
074d8438 MD |
70 | } |
71 | ||
72 | static int verbose_mode; | |
73 | ||
74 | #define printf_verbose(fmt, args...) \ | |
75 | do { \ | |
76 | if (verbose_mode) \ | |
77 | printf(fmt, args); \ | |
78 | } while (0) | |
79 | ||
80 | static unsigned int cpu_affinities[NR_CPUS]; | |
81 | static unsigned int next_aff = 0; | |
82 | static int use_affinity = 0; | |
83 | ||
84 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
85 | ||
86 | static void set_affinity(void) | |
87 | { | |
a9e31859 | 88 | #ifdef HAVE_SCHED_SETAFFINITY |
074d8438 | 89 | cpu_set_t mask; |
95bc7fb9 MD |
90 | int cpu, ret; |
91 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
074d8438 MD |
92 | |
93 | if (!use_affinity) | |
94 | return; | |
95 | ||
a9e31859 | 96 | #ifdef HAVE_SCHED_SETAFFINITY |
074d8438 MD |
97 | ret = pthread_mutex_lock(&affinity_mutex); |
98 | if (ret) { | |
99 | perror("Error in pthread mutex lock"); | |
100 | exit(-1); | |
101 | } | |
102 | cpu = cpu_affinities[next_aff++]; | |
103 | ret = pthread_mutex_unlock(&affinity_mutex); | |
104 | if (ret) { | |
105 | perror("Error in pthread mutex unlock"); | |
106 | exit(-1); | |
107 | } | |
d8540fc5 | 108 | |
074d8438 MD |
109 | CPU_ZERO(&mask); |
110 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
111 | #if SCHED_SETAFFINITY_ARGS == 2 |
112 | sched_setaffinity(0, &mask); | |
113 | #else | |
074d8438 | 114 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
115 | #endif |
116 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
074d8438 MD |
117 | } |
118 | ||
119 | /* | |
120 | * returns 0 if test should end. | |
121 | */ | |
122 | static int test_duration_write(void) | |
123 | { | |
124 | return !test_stop; | |
125 | } | |
126 | ||
127 | static int test_duration_read(void) | |
128 | { | |
129 | return !test_stop; | |
130 | } | |
131 | ||
bd252a04 MD |
132 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
133 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
074d8438 MD |
134 | |
135 | static unsigned int nr_readers; | |
136 | static unsigned int nr_writers; | |
137 | ||
138 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
139 | ||
e3717dbc | 140 | static |
074d8438 MD |
141 | void rcu_copy_mutex_lock(void) |
142 | { | |
143 | int ret; | |
144 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
145 | if (ret) { | |
146 | perror("Error in pthread mutex lock"); | |
147 | exit(-1); | |
148 | } | |
149 | } | |
150 | ||
e3717dbc | 151 | static |
074d8438 MD |
152 | void rcu_copy_mutex_unlock(void) |
153 | { | |
154 | int ret; | |
155 | ||
156 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
157 | if (ret) { | |
158 | perror("Error in pthread mutex unlock"); | |
159 | exit(-1); | |
160 | } | |
161 | } | |
162 | ||
163 | /* | |
164 | * malloc/free are reusing memory areas too quickly, which does not let us | |
165 | * test races appropriately. Use a large circular array for allocations. | |
d4267b0b MD |
166 | * ARRAY_SIZE is larger than nr_writers, and we keep the mutex across |
167 | * both alloc and free, which insures we never run over our tail. | |
074d8438 MD |
168 | */ |
169 | #define ARRAY_SIZE (1048576 * nr_writers) | |
83e334d0 MJ |
170 | #define ARRAY_POISON (int) 0xDEADBEEF |
171 | static unsigned int array_index; | |
074d8438 MD |
172 | static struct test_array *test_array; |
173 | ||
174 | static struct test_array *test_array_alloc(void) | |
175 | { | |
176 | struct test_array *ret; | |
177 | int index; | |
178 | ||
074d8438 MD |
179 | index = array_index % ARRAY_SIZE; |
180 | assert(test_array[index].a == ARRAY_POISON || | |
181 | test_array[index].a == 0); | |
182 | ret = &test_array[index]; | |
183 | array_index++; | |
184 | if (array_index == ARRAY_SIZE) | |
185 | array_index = 0; | |
074d8438 MD |
186 | return ret; |
187 | } | |
188 | ||
189 | static void test_array_free(struct test_array *ptr) | |
190 | { | |
191 | if (!ptr) | |
192 | return; | |
074d8438 | 193 | ptr->a = ARRAY_POISON; |
074d8438 MD |
194 | } |
195 | ||
e3717dbc | 196 | static |
074d8438 MD |
197 | void *thr_reader(void *_count) |
198 | { | |
199 | unsigned long long *count = _count; | |
200 | struct test_array *local_ptr; | |
201 | ||
94df6318 MD |
202 | printf_verbose("thread_begin %s, tid %lu\n", |
203 | "reader", urcu_get_thread_id()); | |
074d8438 MD |
204 | |
205 | set_affinity(); | |
206 | ||
207 | rcu_register_thread(); | |
208 | ||
209 | while (!test_go) | |
210 | { | |
211 | } | |
5481ddb3 | 212 | cmm_smp_mb(); |
074d8438 MD |
213 | |
214 | for (;;) { | |
215 | rcu_read_lock(); | |
216 | local_ptr = rcu_dereference(test_rcu_pointer); | |
1de4df4b | 217 | rcu_debug_yield_read(); |
074d8438 MD |
218 | if (local_ptr) |
219 | assert(local_ptr->a == 8); | |
a0b7f7ea | 220 | if (caa_unlikely(rduration)) |
074d8438 MD |
221 | loop_sleep(rduration); |
222 | rcu_read_unlock(); | |
bd252a04 | 223 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 224 | if (caa_unlikely(!test_duration_read())) |
074d8438 MD |
225 | break; |
226 | } | |
227 | ||
228 | rcu_unregister_thread(); | |
229 | ||
bd252a04 | 230 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
231 | printf_verbose("thread_end %s, tid %lu\n", |
232 | "reader", urcu_get_thread_id()); | |
074d8438 MD |
233 | return ((void*)1); |
234 | ||
235 | } | |
236 | ||
e3717dbc | 237 | static |
074d8438 MD |
238 | void *thr_writer(void *_count) |
239 | { | |
240 | unsigned long long *count = _count; | |
241 | struct test_array *new, *old; | |
242 | ||
94df6318 MD |
243 | printf_verbose("thread_begin %s, tid %lu\n", |
244 | "writer", urcu_get_thread_id()); | |
074d8438 MD |
245 | |
246 | set_affinity(); | |
247 | ||
248 | while (!test_go) | |
249 | { | |
250 | } | |
5481ddb3 | 251 | cmm_smp_mb(); |
074d8438 MD |
252 | |
253 | for (;;) { | |
d4267b0b | 254 | rcu_copy_mutex_lock(); |
074d8438 MD |
255 | new = test_array_alloc(); |
256 | new->a = 8; | |
074d8438 MD |
257 | old = test_rcu_pointer; |
258 | rcu_assign_pointer(test_rcu_pointer, new); | |
a0b7f7ea | 259 | if (caa_unlikely(wduration)) |
31b598e0 | 260 | loop_sleep(wduration); |
074d8438 MD |
261 | synchronize_rcu(); |
262 | if (old) | |
263 | old->a = 0; | |
264 | test_array_free(old); | |
d4267b0b | 265 | rcu_copy_mutex_unlock(); |
bd252a04 | 266 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 267 | if (caa_unlikely(!test_duration_write())) |
074d8438 | 268 | break; |
a0b7f7ea | 269 | if (caa_unlikely(wdelay)) |
074d8438 MD |
270 | loop_sleep(wdelay); |
271 | } | |
272 | ||
94df6318 MD |
273 | printf_verbose("thread_end %s, tid %lu\n", |
274 | "writer", urcu_get_thread_id()); | |
bd252a04 | 275 | *count = URCU_TLS(nr_writes); |
074d8438 MD |
276 | return ((void*)2); |
277 | } | |
278 | ||
e3717dbc | 279 | static |
17a8f206 | 280 | void show_usage(char **argv) |
074d8438 | 281 | { |
06637138 MD |
282 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
283 | argv[0]); | |
284 | printf("OPTIONS:\n"); | |
06637138 | 285 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
286 | printf(" [-d delay] (writer period (us))\n"); |
287 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
288 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
289 | printf(" [-v] (verbose output)\n"); | |
290 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
074d8438 MD |
291 | printf("\n"); |
292 | } | |
293 | ||
294 | int main(int argc, char **argv) | |
295 | { | |
296 | int err; | |
297 | pthread_t *tid_reader, *tid_writer; | |
298 | void *tret; | |
299 | unsigned long long *count_reader, *count_writer; | |
300 | unsigned long long tot_reads = 0, tot_writes = 0; | |
301 | int i, a; | |
83e334d0 | 302 | unsigned int i_thr; |
074d8438 MD |
303 | |
304 | if (argc < 4) { | |
17a8f206 | 305 | show_usage(argv); |
074d8438 MD |
306 | return -1; |
307 | } | |
308 | ||
309 | err = sscanf(argv[1], "%u", &nr_readers); | |
310 | if (err != 1) { | |
17a8f206 | 311 | show_usage(argv); |
074d8438 MD |
312 | return -1; |
313 | } | |
314 | ||
315 | err = sscanf(argv[2], "%u", &nr_writers); | |
316 | if (err != 1) { | |
17a8f206 | 317 | show_usage(argv); |
074d8438 MD |
318 | return -1; |
319 | } | |
83e334d0 | 320 | |
074d8438 MD |
321 | err = sscanf(argv[3], "%lu", &duration); |
322 | if (err != 1) { | |
17a8f206 | 323 | show_usage(argv); |
074d8438 MD |
324 | return -1; |
325 | } | |
326 | ||
327 | for (i = 4; i < argc; i++) { | |
328 | if (argv[i][0] != '-') | |
329 | continue; | |
330 | switch (argv[i][1]) { | |
074d8438 | 331 | case 'r': |
2650042a | 332 | rcu_debug_yield_enable(RCU_YIELD_READ); |
074d8438 MD |
333 | break; |
334 | case 'w': | |
2650042a | 335 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
074d8438 | 336 | break; |
074d8438 MD |
337 | case 'a': |
338 | if (argc < i + 2) { | |
17a8f206 | 339 | show_usage(argv); |
074d8438 MD |
340 | return -1; |
341 | } | |
342 | a = atoi(argv[++i]); | |
343 | cpu_affinities[next_aff++] = a; | |
344 | use_affinity = 1; | |
345 | printf_verbose("Adding CPU %d affinity\n", a); | |
346 | break; | |
347 | case 'c': | |
348 | if (argc < i + 2) { | |
17a8f206 | 349 | show_usage(argv); |
074d8438 MD |
350 | return -1; |
351 | } | |
352 | rduration = atol(argv[++i]); | |
353 | break; | |
354 | case 'd': | |
355 | if (argc < i + 2) { | |
17a8f206 | 356 | show_usage(argv); |
074d8438 MD |
357 | return -1; |
358 | } | |
359 | wdelay = atol(argv[++i]); | |
360 | break; | |
31b598e0 MD |
361 | case 'e': |
362 | if (argc < i + 2) { | |
17a8f206 | 363 | show_usage(argv); |
31b598e0 MD |
364 | return -1; |
365 | } | |
366 | wduration = atol(argv[++i]); | |
367 | break; | |
074d8438 MD |
368 | case 'v': |
369 | verbose_mode = 1; | |
370 | break; | |
371 | } | |
372 | } | |
373 | ||
374 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
375 | duration, nr_readers, nr_writers); | |
376 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
377 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
378 | printf_verbose("thread %-6s, tid %lu\n", |
379 | "main", urcu_get_thread_id()); | |
074d8438 | 380 | |
92e8d9d6 | 381 | test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE); |
9aa14175 MD |
382 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
383 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
384 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
385 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
074d8438 MD |
386 | |
387 | next_aff = 0; | |
388 | ||
83e334d0 MJ |
389 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
390 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
391 | &count_reader[i_thr]); | |
074d8438 MD |
392 | if (err != 0) |
393 | exit(1); | |
394 | } | |
83e334d0 MJ |
395 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
396 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
397 | &count_writer[i_thr]); | |
074d8438 MD |
398 | if (err != 0) |
399 | exit(1); | |
400 | } | |
401 | ||
5481ddb3 | 402 | cmm_smp_mb(); |
074d8438 MD |
403 | |
404 | test_go = 1; | |
405 | ||
406 | sleep(duration); | |
407 | ||
408 | test_stop = 1; | |
409 | ||
83e334d0 MJ |
410 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
411 | err = pthread_join(tid_reader[i_thr], &tret); | |
074d8438 MD |
412 | if (err != 0) |
413 | exit(1); | |
83e334d0 | 414 | tot_reads += count_reader[i_thr]; |
074d8438 | 415 | } |
83e334d0 MJ |
416 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
417 | err = pthread_join(tid_writer[i_thr], &tret); | |
074d8438 MD |
418 | if (err != 0) |
419 | exit(1); | |
83e334d0 | 420 | tot_writes += count_writer[i_thr]; |
074d8438 | 421 | } |
83e334d0 | 422 | |
074d8438 MD |
423 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
424 | tot_writes); | |
a50a7b43 | 425 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
074d8438 MD |
426 | "nr_writers %3u " |
427 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 428 | argv[0], duration, nr_readers, rduration, wduration, |
074d8438 MD |
429 | nr_writers, wdelay, tot_reads, tot_writes, |
430 | tot_reads + tot_writes); | |
83e334d0 | 431 | |
074d8438 MD |
432 | test_array_free(test_rcu_pointer); |
433 | free(test_array); | |
434 | free(tid_reader); | |
435 | free(tid_writer); | |
436 | free(count_reader); | |
437 | free(count_writer); | |
83e334d0 | 438 | |
074d8438 MD |
439 | return 0; |
440 | } |