Commit | Line | Data |
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de10a585 MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
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 | ||
de10a585 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> | |
de10a585 MD |
32 | #include <errno.h> |
33 | ||
34 | #include <urcu/arch.h> | |
bd252a04 | 35 | #include <urcu/tls-compat.h> |
94df6318 | 36 | #include "thread-id.h" |
2650042a | 37 | #include "../common/debug-yield.h" |
de10a585 MD |
38 | |
39 | /* hardcoded number of CPUs */ | |
40 | #define NR_CPUS 16384 | |
41 | ||
de10a585 MD |
42 | #ifndef DYNAMIC_LINK_TEST |
43 | #define _LGPL_SOURCE | |
de10a585 MD |
44 | #endif |
45 | #include "urcu-qsbr.h" | |
46 | ||
de10a585 MD |
47 | static volatile int test_go, test_stop; |
48 | ||
49 | static unsigned long wdelay; | |
50 | ||
bcc74df3 | 51 | static int *test_rcu_pointer; |
de10a585 MD |
52 | |
53 | static unsigned long duration; | |
54 | ||
55 | /* read-side C.S. duration, in loops */ | |
56 | static unsigned long rduration; | |
57 | ||
58 | /* write-side C.S. duration, in loops */ | |
59 | static unsigned long wduration; | |
60 | ||
ab0aacbe | 61 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 62 | { |
ab0aacbe | 63 | while (loops-- != 0) |
de10a585 MD |
64 | caa_cpu_relax(); |
65 | } | |
66 | ||
67 | static int verbose_mode; | |
68 | ||
69 | #define printf_verbose(fmt, args...) \ | |
70 | do { \ | |
71 | if (verbose_mode) \ | |
72 | printf(fmt, args); \ | |
73 | } while (0) | |
74 | ||
75 | static unsigned int cpu_affinities[NR_CPUS]; | |
76 | static unsigned int next_aff = 0; | |
77 | static int use_affinity = 0; | |
78 | ||
79 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
80 | ||
de10a585 MD |
81 | static void set_affinity(void) |
82 | { | |
95bc7fb9 | 83 | #if HAVE_SCHED_SETAFFINITY |
de10a585 | 84 | cpu_set_t mask; |
95bc7fb9 MD |
85 | int cpu, ret; |
86 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
87 | |
88 | if (!use_affinity) | |
89 | return; | |
90 | ||
91 | #if HAVE_SCHED_SETAFFINITY | |
92 | ret = pthread_mutex_lock(&affinity_mutex); | |
93 | if (ret) { | |
94 | perror("Error in pthread mutex lock"); | |
95 | exit(-1); | |
96 | } | |
97 | cpu = cpu_affinities[next_aff++]; | |
98 | ret = pthread_mutex_unlock(&affinity_mutex); | |
99 | if (ret) { | |
100 | perror("Error in pthread mutex unlock"); | |
101 | exit(-1); | |
102 | } | |
103 | CPU_ZERO(&mask); | |
104 | CPU_SET(cpu, &mask); | |
de10a585 | 105 | sched_setaffinity(0, sizeof(mask), &mask); |
de10a585 MD |
106 | #endif /* HAVE_SCHED_SETAFFINITY */ |
107 | } | |
108 | ||
109 | /* | |
110 | * returns 0 if test should end. | |
111 | */ | |
112 | static int test_duration_write(void) | |
113 | { | |
114 | return !test_stop; | |
115 | } | |
116 | ||
117 | static int test_duration_read(void) | |
118 | { | |
119 | return !test_stop; | |
120 | } | |
121 | ||
bd252a04 MD |
122 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
123 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
124 | |
125 | static unsigned int nr_readers; | |
126 | static unsigned int nr_writers; | |
127 | ||
128 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
129 | ||
130 | void rcu_copy_mutex_lock(void) | |
131 | { | |
132 | int ret; | |
133 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
134 | if (ret) { | |
135 | perror("Error in pthread mutex lock"); | |
136 | exit(-1); | |
137 | } | |
138 | } | |
139 | ||
140 | void rcu_copy_mutex_unlock(void) | |
141 | { | |
142 | int ret; | |
143 | ||
144 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
145 | if (ret) { | |
146 | perror("Error in pthread mutex unlock"); | |
147 | exit(-1); | |
148 | } | |
149 | } | |
150 | ||
de10a585 MD |
151 | void *thr_reader(void *_count) |
152 | { | |
153 | unsigned long long *count = _count; | |
bcc74df3 | 154 | int *local_ptr; |
de10a585 | 155 | |
94df6318 MD |
156 | printf_verbose("thread_begin %s, tid %lu\n", |
157 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
158 | |
159 | set_affinity(); | |
160 | ||
161 | rcu_register_thread(); | |
162 | ||
882f3357 MD |
163 | assert(rcu_read_ongoing()); |
164 | rcu_thread_offline(); | |
165 | assert(!rcu_read_ongoing()); | |
166 | rcu_thread_online(); | |
167 | ||
de10a585 MD |
168 | while (!test_go) |
169 | { | |
170 | } | |
171 | cmm_smp_mb(); | |
172 | ||
173 | for (;;) { | |
174 | rcu_read_lock(); | |
882f3357 | 175 | assert(rcu_read_ongoing()); |
de10a585 | 176 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 177 | rcu_debug_yield_read(); |
de10a585 | 178 | if (local_ptr) |
bcc74df3 | 179 | assert(*local_ptr == 8); |
a0b7f7ea | 180 | if (caa_unlikely(rduration)) |
de10a585 MD |
181 | loop_sleep(rduration); |
182 | rcu_read_unlock(); | |
bd252a04 | 183 | URCU_TLS(nr_reads)++; |
de10a585 | 184 | /* QS each 1024 reads */ |
bd252a04 | 185 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 186 | rcu_quiescent_state(); |
a0b7f7ea | 187 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
188 | break; |
189 | } | |
190 | ||
191 | rcu_unregister_thread(); | |
192 | ||
193 | /* test extra thread registration */ | |
194 | rcu_register_thread(); | |
195 | rcu_unregister_thread(); | |
196 | ||
bd252a04 | 197 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
198 | printf_verbose("thread_end %s, tid %lu\n", |
199 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
200 | return ((void*)1); |
201 | ||
202 | } | |
203 | ||
204 | void *thr_writer(void *_count) | |
205 | { | |
206 | unsigned long long *count = _count; | |
bcc74df3 | 207 | int *new, *old; |
de10a585 | 208 | |
94df6318 MD |
209 | printf_verbose("thread_begin %s, tid %lu\n", |
210 | "writer", urcu_get_thread_id()); | |
de10a585 MD |
211 | |
212 | set_affinity(); | |
213 | ||
214 | while (!test_go) | |
215 | { | |
216 | } | |
217 | cmm_smp_mb(); | |
218 | ||
219 | for (;;) { | |
bcc74df3 MD |
220 | new = malloc(sizeof(int)); |
221 | assert(new); | |
222 | *new = 8; | |
de10a585 | 223 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 224 | if (caa_unlikely(wduration)) |
de10a585 MD |
225 | loop_sleep(wduration); |
226 | synchronize_rcu(); | |
de10a585 | 227 | if (old) |
bcc74df3 MD |
228 | *old = 0; |
229 | free(old); | |
bd252a04 | 230 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 231 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 232 | break; |
a0b7f7ea | 233 | if (caa_unlikely(wdelay)) |
de10a585 MD |
234 | loop_sleep(wdelay); |
235 | } | |
236 | ||
94df6318 MD |
237 | printf_verbose("thread_end %s, tid %lu\n", |
238 | "writer", urcu_get_thread_id()); | |
bd252a04 | 239 | *count = URCU_TLS(nr_writes); |
de10a585 MD |
240 | return ((void*)2); |
241 | } | |
242 | ||
243 | void show_usage(int argc, char **argv) | |
244 | { | |
06637138 MD |
245 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
246 | argv[0]); | |
247 | printf("OPTIONS:\n"); | |
06637138 | 248 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
249 | printf(" [-d delay] (writer period (us))\n"); |
250 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
251 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
252 | printf(" [-v] (verbose output)\n"); | |
253 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
de10a585 MD |
254 | printf("\n"); |
255 | } | |
256 | ||
257 | int main(int argc, char **argv) | |
258 | { | |
259 | int err; | |
260 | pthread_t *tid_reader, *tid_writer; | |
261 | void *tret; | |
262 | unsigned long long *count_reader, *count_writer; | |
263 | unsigned long long tot_reads = 0, tot_writes = 0; | |
264 | int i, a; | |
83e334d0 | 265 | unsigned int i_thr; |
de10a585 MD |
266 | |
267 | if (argc < 4) { | |
268 | show_usage(argc, argv); | |
269 | return -1; | |
270 | } | |
271 | ||
272 | err = sscanf(argv[1], "%u", &nr_readers); | |
273 | if (err != 1) { | |
274 | show_usage(argc, argv); | |
275 | return -1; | |
276 | } | |
277 | ||
278 | err = sscanf(argv[2], "%u", &nr_writers); | |
279 | if (err != 1) { | |
280 | show_usage(argc, argv); | |
281 | return -1; | |
282 | } | |
83e334d0 | 283 | |
de10a585 MD |
284 | err = sscanf(argv[3], "%lu", &duration); |
285 | if (err != 1) { | |
286 | show_usage(argc, argv); | |
287 | return -1; | |
288 | } | |
289 | ||
290 | for (i = 4; i < argc; i++) { | |
291 | if (argv[i][0] != '-') | |
292 | continue; | |
293 | switch (argv[i][1]) { | |
de10a585 | 294 | case 'r': |
2650042a | 295 | rcu_debug_yield_enable(RCU_YIELD_READ); |
de10a585 MD |
296 | break; |
297 | case 'w': | |
2650042a | 298 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
de10a585 | 299 | break; |
de10a585 MD |
300 | case 'a': |
301 | if (argc < i + 2) { | |
302 | show_usage(argc, argv); | |
303 | return -1; | |
304 | } | |
305 | a = atoi(argv[++i]); | |
306 | cpu_affinities[next_aff++] = a; | |
307 | use_affinity = 1; | |
308 | printf_verbose("Adding CPU %d affinity\n", a); | |
309 | break; | |
310 | case 'c': | |
311 | if (argc < i + 2) { | |
312 | show_usage(argc, argv); | |
313 | return -1; | |
314 | } | |
315 | rduration = atol(argv[++i]); | |
316 | break; | |
317 | case 'd': | |
318 | if (argc < i + 2) { | |
319 | show_usage(argc, argv); | |
320 | return -1; | |
321 | } | |
322 | wdelay = atol(argv[++i]); | |
323 | break; | |
324 | case 'e': | |
325 | if (argc < i + 2) { | |
326 | show_usage(argc, argv); | |
327 | return -1; | |
328 | } | |
329 | wduration = atol(argv[++i]); | |
330 | break; | |
331 | case 'v': | |
332 | verbose_mode = 1; | |
333 | break; | |
334 | } | |
335 | } | |
336 | ||
337 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
338 | duration, nr_readers, nr_writers); | |
339 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
340 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
341 | printf_verbose("thread %-6s, tid %lu\n", |
342 | "main", urcu_get_thread_id()); | |
de10a585 | 343 | |
9aa14175 MD |
344 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
345 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
346 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
347 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
de10a585 MD |
348 | |
349 | next_aff = 0; | |
350 | ||
83e334d0 MJ |
351 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
352 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
353 | &count_reader[i_thr]); | |
de10a585 MD |
354 | if (err != 0) |
355 | exit(1); | |
356 | } | |
83e334d0 MJ |
357 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
358 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
359 | &count_writer[i_thr]); | |
de10a585 MD |
360 | if (err != 0) |
361 | exit(1); | |
362 | } | |
363 | ||
364 | cmm_smp_mb(); | |
365 | ||
366 | test_go = 1; | |
367 | ||
368 | sleep(duration); | |
369 | ||
370 | test_stop = 1; | |
371 | ||
83e334d0 MJ |
372 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
373 | err = pthread_join(tid_reader[i_thr], &tret); | |
de10a585 MD |
374 | if (err != 0) |
375 | exit(1); | |
83e334d0 | 376 | tot_reads += count_reader[i_thr]; |
de10a585 | 377 | } |
83e334d0 MJ |
378 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
379 | err = pthread_join(tid_writer[i_thr], &tret); | |
de10a585 MD |
380 | if (err != 0) |
381 | exit(1); | |
83e334d0 | 382 | tot_writes += count_writer[i_thr]; |
de10a585 | 383 | } |
83e334d0 | 384 | |
de10a585 MD |
385 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
386 | tot_writes); | |
387 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
388 | "nr_writers %3u " | |
389 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
390 | argv[0], duration, nr_readers, rduration, wduration, | |
391 | nr_writers, wdelay, tot_reads, tot_writes, | |
392 | tot_reads + tot_writes); | |
bcc74df3 | 393 | free(test_rcu_pointer); |
de10a585 MD |
394 | free(tid_reader); |
395 | free(tid_writer); | |
396 | free(count_reader); | |
397 | free(count_writer); | |
398 | return 0; | |
399 | } |