Commit | Line | Data |
---|---|---|
90075a50 | 1 | /* |
786ee85b | 2 | * test_urcu_defer.c |
90075a50 MD |
3 | * |
4 | * Userspace RCU library - test program (with automatic reclamation) | |
5 | * | |
6982d6d7 | 6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
90075a50 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 | ||
23 | #define _GNU_SOURCE | |
d8540fc5 | 24 | #include "../config.h" |
90075a50 MD |
25 | #include <stdio.h> |
26 | #include <pthread.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | #include <unistd.h> | |
32 | #include <stdio.h> | |
33 | #include <assert.h> | |
94b343fd | 34 | #include <errno.h> |
90075a50 | 35 | |
ec4e58a3 | 36 | #include <urcu/arch.h> |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
2953b501 | 38 | #include "cpuset.h" |
90075a50 | 39 | |
65fcc7e9 MD |
40 | #ifdef __linux__ |
41 | #include <syscall.h> | |
42 | #endif | |
43 | ||
90075a50 MD |
44 | /* hardcoded number of CPUs */ |
45 | #define NR_CPUS 16384 | |
46 | ||
47 | #if defined(_syscall0) | |
48 | _syscall0(pid_t, gettid) | |
49 | #elif defined(__NR_gettid) | |
50 | static inline pid_t gettid(void) | |
51 | { | |
52 | return syscall(__NR_gettid); | |
53 | } | |
54 | #else | |
55 | #warning "use pid as tid" | |
56 | static inline pid_t gettid(void) | |
57 | { | |
58 | return getpid(); | |
59 | } | |
60 | #endif | |
61 | ||
62 | #ifndef DYNAMIC_LINK_TEST | |
63 | #define _LGPL_SOURCE | |
64 | #else | |
1de4df4b | 65 | #define rcu_debug_yield_read() |
90075a50 | 66 | #endif |
ec4e58a3 MD |
67 | #include <urcu.h> |
68 | #include <urcu-defer.h> | |
90075a50 MD |
69 | |
70 | struct test_array { | |
71 | int a; | |
72 | }; | |
73 | ||
74 | static volatile int test_go, test_stop; | |
75 | ||
76 | static unsigned long wdelay; | |
77 | ||
78 | static struct test_array *test_rcu_pointer; | |
79 | ||
80 | static unsigned long duration; | |
81 | ||
82 | /* read-side C.S. duration, in loops */ | |
83 | static unsigned long rduration; | |
84 | ||
31b598e0 MD |
85 | /* write-side C.S. duration, in loops */ |
86 | static unsigned long wduration; | |
87 | ||
ab0aacbe | 88 | static inline void loop_sleep(unsigned long loops) |
90075a50 | 89 | { |
ab0aacbe | 90 | while (loops-- != 0) |
06f22bdb | 91 | caa_cpu_relax(); |
90075a50 MD |
92 | } |
93 | ||
94 | static int verbose_mode; | |
95 | ||
96 | #define printf_verbose(fmt, args...) \ | |
97 | do { \ | |
98 | if (verbose_mode) \ | |
99 | printf(fmt, args); \ | |
100 | } while (0) | |
101 | ||
102 | static unsigned int cpu_affinities[NR_CPUS]; | |
103 | static unsigned int next_aff = 0; | |
104 | static int use_affinity = 0; | |
105 | ||
106 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
107 | ||
108 | static void set_affinity(void) | |
109 | { | |
95bc7fb9 | 110 | #if HAVE_SCHED_SETAFFINITY |
90075a50 | 111 | cpu_set_t mask; |
95bc7fb9 MD |
112 | int cpu, ret; |
113 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
90075a50 MD |
114 | |
115 | if (!use_affinity) | |
116 | return; | |
117 | ||
d8540fc5 | 118 | #if HAVE_SCHED_SETAFFINITY |
90075a50 MD |
119 | ret = pthread_mutex_lock(&affinity_mutex); |
120 | if (ret) { | |
121 | perror("Error in pthread mutex lock"); | |
122 | exit(-1); | |
123 | } | |
124 | cpu = cpu_affinities[next_aff++]; | |
125 | ret = pthread_mutex_unlock(&affinity_mutex); | |
126 | if (ret) { | |
127 | perror("Error in pthread mutex unlock"); | |
128 | exit(-1); | |
129 | } | |
d8540fc5 | 130 | |
90075a50 MD |
131 | CPU_ZERO(&mask); |
132 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
133 | #if SCHED_SETAFFINITY_ARGS == 2 |
134 | sched_setaffinity(0, &mask); | |
135 | #else | |
90075a50 | 136 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
137 | #endif |
138 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
90075a50 MD |
139 | } |
140 | ||
141 | /* | |
142 | * returns 0 if test should end. | |
143 | */ | |
144 | static int test_duration_write(void) | |
145 | { | |
146 | return !test_stop; | |
147 | } | |
148 | ||
149 | static int test_duration_read(void) | |
150 | { | |
151 | return !test_stop; | |
152 | } | |
153 | ||
bd252a04 MD |
154 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
155 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
90075a50 MD |
156 | |
157 | static | |
06f22bdb | 158 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
90075a50 MD |
159 | |
160 | static unsigned int nr_readers; | |
161 | static unsigned int nr_writers; | |
162 | ||
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 | } | |
185 | ||
186 | void *thr_reader(void *_count) | |
187 | { | |
188 | unsigned long long *count = _count; | |
189 | struct test_array *local_ptr; | |
190 | ||
191 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
192 | "reader", (unsigned long) pthread_self(), |
193 | (unsigned long) gettid()); | |
90075a50 MD |
194 | |
195 | set_affinity(); | |
196 | ||
197 | rcu_register_thread(); | |
198 | ||
199 | while (!test_go) | |
200 | { | |
201 | } | |
5481ddb3 | 202 | cmm_smp_mb(); |
90075a50 MD |
203 | |
204 | for (;;) { | |
205 | rcu_read_lock(); | |
206 | local_ptr = rcu_dereference(test_rcu_pointer); | |
1de4df4b | 207 | rcu_debug_yield_read(); |
90075a50 MD |
208 | if (local_ptr) |
209 | assert(local_ptr->a == 8); | |
a0b7f7ea | 210 | if (caa_unlikely(rduration)) |
90075a50 MD |
211 | loop_sleep(rduration); |
212 | rcu_read_unlock(); | |
bd252a04 | 213 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 214 | if (caa_unlikely(!test_duration_read())) |
90075a50 MD |
215 | break; |
216 | } | |
217 | ||
218 | rcu_unregister_thread(); | |
219 | ||
bd252a04 | 220 | *count = URCU_TLS(nr_reads); |
90075a50 | 221 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
222 | "reader", (unsigned long) pthread_self(), |
223 | (unsigned long) gettid()); | |
90075a50 MD |
224 | return ((void*)1); |
225 | ||
226 | } | |
227 | ||
804b4375 MD |
228 | static void test_cb2(void *data) |
229 | { | |
230 | } | |
231 | ||
232 | static void test_cb1(void *data) | |
233 | { | |
234 | } | |
235 | ||
90075a50 MD |
236 | void *thr_writer(void *data) |
237 | { | |
238 | unsigned long wtidx = (unsigned long)data; | |
239 | struct test_array *new, *old = NULL; | |
6ade67d5 | 240 | int ret; |
90075a50 MD |
241 | |
242 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
243 | "writer", (unsigned long) pthread_self(), |
244 | (unsigned long) gettid()); | |
90075a50 MD |
245 | |
246 | set_affinity(); | |
247 | ||
6ade67d5 MD |
248 | ret = rcu_defer_register_thread(); |
249 | if (ret) { | |
250 | printf("Error in rcu_defer_register_thread\n"); | |
251 | exit(-1); | |
252 | } | |
90075a50 MD |
253 | |
254 | while (!test_go) | |
255 | { | |
256 | } | |
5481ddb3 | 257 | cmm_smp_mb(); |
90075a50 MD |
258 | |
259 | for (;;) { | |
260 | new = malloc(sizeof(*new)); | |
261 | new->a = 8; | |
262 | old = rcu_xchg_pointer(&test_rcu_pointer, new); | |
a0b7f7ea | 263 | if (caa_unlikely(wduration)) |
31b598e0 | 264 | loop_sleep(wduration); |
b4f313b7 MD |
265 | defer_rcu(free, old); |
266 | defer_rcu(test_cb1, old); | |
267 | defer_rcu(test_cb1, (void *)-2L); | |
268 | defer_rcu(test_cb1, (void *)-2L); | |
269 | defer_rcu(test_cb1, old); | |
270 | defer_rcu(test_cb2, (void *)-2L); | |
271 | defer_rcu(test_cb2, (void *)-4L); | |
272 | defer_rcu(test_cb2, (void *)-2L); | |
bd252a04 | 273 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 274 | if (caa_unlikely(!test_duration_write())) |
90075a50 | 275 | break; |
a0b7f7ea | 276 | if (caa_unlikely(wdelay)) |
90075a50 MD |
277 | loop_sleep(wdelay); |
278 | } | |
279 | ||
786ee85b | 280 | rcu_defer_unregister_thread(); |
90075a50 MD |
281 | |
282 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
283 | "writer", (unsigned long) pthread_self(), |
284 | (unsigned long) gettid()); | |
bd252a04 | 285 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
90075a50 MD |
286 | return ((void*)2); |
287 | } | |
288 | ||
289 | void show_usage(int argc, char **argv) | |
290 | { | |
291 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
292 | #ifdef DEBUG_YIELD | |
293 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
294 | #endif | |
295 | printf(" [-d delay] (writer period (us))"); | |
296 | printf(" [-c duration] (reader C.S. duration (in loops))"); | |
31b598e0 | 297 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
90075a50 MD |
298 | printf(" [-v] (verbose output)"); |
299 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); | |
300 | printf("\n"); | |
301 | } | |
302 | ||
303 | int main(int argc, char **argv) | |
304 | { | |
305 | int err; | |
306 | pthread_t *tid_reader, *tid_writer; | |
307 | void *tret; | |
308 | unsigned long long *count_reader; | |
309 | unsigned long long tot_reads = 0, tot_writes = 0; | |
310 | int i, a; | |
311 | ||
312 | if (argc < 4) { | |
313 | show_usage(argc, argv); | |
314 | return -1; | |
315 | } | |
316 | ||
317 | err = sscanf(argv[1], "%u", &nr_readers); | |
318 | if (err != 1) { | |
319 | show_usage(argc, argv); | |
320 | return -1; | |
321 | } | |
322 | ||
323 | err = sscanf(argv[2], "%u", &nr_writers); | |
324 | if (err != 1) { | |
325 | show_usage(argc, argv); | |
326 | return -1; | |
327 | } | |
328 | ||
329 | err = sscanf(argv[3], "%lu", &duration); | |
330 | if (err != 1) { | |
331 | show_usage(argc, argv); | |
332 | return -1; | |
333 | } | |
334 | ||
335 | for (i = 4; i < argc; i++) { | |
336 | if (argv[i][0] != '-') | |
337 | continue; | |
338 | switch (argv[i][1]) { | |
339 | #ifdef DEBUG_YIELD | |
340 | case 'r': | |
1de4df4b | 341 | rcu_yield_active |= RCU_YIELD_READ; |
90075a50 MD |
342 | break; |
343 | case 'w': | |
1de4df4b | 344 | rcu_yield_active |= RCU_YIELD_WRITE; |
90075a50 MD |
345 | break; |
346 | #endif | |
347 | case 'a': | |
348 | if (argc < i + 2) { | |
349 | show_usage(argc, argv); | |
350 | return -1; | |
351 | } | |
352 | a = atoi(argv[++i]); | |
353 | cpu_affinities[next_aff++] = a; | |
354 | use_affinity = 1; | |
355 | printf_verbose("Adding CPU %d affinity\n", a); | |
356 | break; | |
357 | case 'c': | |
358 | if (argc < i + 2) { | |
359 | show_usage(argc, argv); | |
360 | return -1; | |
361 | } | |
362 | rduration = atol(argv[++i]); | |
363 | break; | |
364 | case 'd': | |
365 | if (argc < i + 2) { | |
366 | show_usage(argc, argv); | |
367 | return -1; | |
368 | } | |
369 | wdelay = atol(argv[++i]); | |
370 | break; | |
31b598e0 MD |
371 | case 'e': |
372 | if (argc < i + 2) { | |
373 | show_usage(argc, argv); | |
374 | return -1; | |
375 | } | |
376 | wduration = atol(argv[++i]); | |
377 | break; | |
90075a50 MD |
378 | case 'v': |
379 | verbose_mode = 1; | |
380 | break; | |
381 | } | |
382 | } | |
383 | ||
384 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
385 | duration, nr_readers, nr_writers); | |
386 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
387 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
388 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
389 | "main", (unsigned long) pthread_self(), |
390 | (unsigned long) gettid()); | |
90075a50 MD |
391 | |
392 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
393 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
394 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
395 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
396 | ||
397 | next_aff = 0; | |
398 | ||
399 | for (i = 0; i < nr_readers; i++) { | |
400 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
401 | &count_reader[i]); | |
402 | if (err != 0) | |
403 | exit(1); | |
404 | } | |
405 | for (i = 0; i < nr_writers; i++) { | |
406 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
407 | (void *)(long)i); | |
408 | if (err != 0) | |
409 | exit(1); | |
410 | } | |
411 | ||
5481ddb3 | 412 | cmm_smp_mb(); |
90075a50 MD |
413 | |
414 | test_go = 1; | |
415 | ||
416 | sleep(duration); | |
417 | ||
418 | test_stop = 1; | |
419 | ||
420 | for (i = 0; i < nr_readers; i++) { | |
421 | err = pthread_join(tid_reader[i], &tret); | |
422 | if (err != 0) | |
423 | exit(1); | |
424 | tot_reads += count_reader[i]; | |
425 | } | |
426 | for (i = 0; i < nr_writers; i++) { | |
427 | err = pthread_join(tid_writer[i], &tret); | |
428 | if (err != 0) | |
429 | exit(1); | |
430 | tot_writes += tot_nr_writes[i]; | |
431 | } | |
432 | ||
433 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
434 | tot_writes); | |
a50a7b43 | 435 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
90075a50 MD |
436 | "nr_writers %3u " |
437 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 438 | argv[0], duration, nr_readers, rduration, wduration, |
90075a50 MD |
439 | nr_writers, wdelay, tot_reads, tot_writes, |
440 | tot_reads + tot_writes); | |
441 | free(tid_reader); | |
442 | free(tid_writer); | |
443 | free(count_reader); | |
444 | free(tot_nr_writes); | |
445 | ||
446 | return 0; | |
447 | } |