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> |
2953b501 | 36 | #include "cpuset.h" |
94df6318 | 37 | #include "thread-id.h" |
2650042a | 38 | #include "../common/debug-yield.h" |
de10a585 MD |
39 | |
40 | /* hardcoded number of CPUs */ | |
41 | #define NR_CPUS 16384 | |
42 | ||
de10a585 MD |
43 | #ifndef DYNAMIC_LINK_TEST |
44 | #define _LGPL_SOURCE | |
de10a585 MD |
45 | #endif |
46 | #include "urcu-qsbr.h" | |
47 | ||
de10a585 MD |
48 | static volatile int test_go, test_stop; |
49 | ||
50 | static unsigned long wdelay; | |
51 | ||
bcc74df3 | 52 | static int *test_rcu_pointer; |
de10a585 MD |
53 | |
54 | static unsigned long duration; | |
55 | ||
56 | /* read-side C.S. duration, in loops */ | |
57 | static unsigned long rduration; | |
58 | ||
59 | /* write-side C.S. duration, in loops */ | |
60 | static unsigned long wduration; | |
61 | ||
ab0aacbe | 62 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 63 | { |
ab0aacbe | 64 | while (loops-- != 0) |
de10a585 MD |
65 | caa_cpu_relax(); |
66 | } | |
67 | ||
68 | static int verbose_mode; | |
69 | ||
70 | #define printf_verbose(fmt, args...) \ | |
71 | do { \ | |
72 | if (verbose_mode) \ | |
73 | printf(fmt, args); \ | |
74 | } while (0) | |
75 | ||
76 | static unsigned int cpu_affinities[NR_CPUS]; | |
77 | static unsigned int next_aff = 0; | |
78 | static int use_affinity = 0; | |
79 | ||
80 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
81 | ||
de10a585 MD |
82 | static void set_affinity(void) |
83 | { | |
95bc7fb9 | 84 | #if HAVE_SCHED_SETAFFINITY |
de10a585 | 85 | cpu_set_t mask; |
95bc7fb9 MD |
86 | int cpu, ret; |
87 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
88 | |
89 | if (!use_affinity) | |
90 | return; | |
91 | ||
92 | #if HAVE_SCHED_SETAFFINITY | |
93 | ret = pthread_mutex_lock(&affinity_mutex); | |
94 | if (ret) { | |
95 | perror("Error in pthread mutex lock"); | |
96 | exit(-1); | |
97 | } | |
98 | cpu = cpu_affinities[next_aff++]; | |
99 | ret = pthread_mutex_unlock(&affinity_mutex); | |
100 | if (ret) { | |
101 | perror("Error in pthread mutex unlock"); | |
102 | exit(-1); | |
103 | } | |
104 | CPU_ZERO(&mask); | |
105 | CPU_SET(cpu, &mask); | |
106 | #if SCHED_SETAFFINITY_ARGS == 2 | |
107 | sched_setaffinity(0, &mask); | |
108 | #else | |
109 | sched_setaffinity(0, sizeof(mask), &mask); | |
110 | #endif | |
111 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
112 | } | |
113 | ||
114 | /* | |
115 | * returns 0 if test should end. | |
116 | */ | |
117 | static int test_duration_write(void) | |
118 | { | |
119 | return !test_stop; | |
120 | } | |
121 | ||
122 | static int test_duration_read(void) | |
123 | { | |
124 | return !test_stop; | |
125 | } | |
126 | ||
bd252a04 MD |
127 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
128 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
129 | |
130 | static unsigned int nr_readers; | |
131 | static unsigned int nr_writers; | |
132 | ||
133 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
134 | ||
135 | void rcu_copy_mutex_lock(void) | |
136 | { | |
137 | int ret; | |
138 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
139 | if (ret) { | |
140 | perror("Error in pthread mutex lock"); | |
141 | exit(-1); | |
142 | } | |
143 | } | |
144 | ||
145 | void rcu_copy_mutex_unlock(void) | |
146 | { | |
147 | int ret; | |
148 | ||
149 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
150 | if (ret) { | |
151 | perror("Error in pthread mutex unlock"); | |
152 | exit(-1); | |
153 | } | |
154 | } | |
155 | ||
de10a585 MD |
156 | void *thr_reader(void *_count) |
157 | { | |
158 | unsigned long long *count = _count; | |
bcc74df3 | 159 | int *local_ptr; |
de10a585 | 160 | |
94df6318 MD |
161 | printf_verbose("thread_begin %s, tid %lu\n", |
162 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
163 | |
164 | set_affinity(); | |
165 | ||
166 | rcu_register_thread(); | |
167 | ||
882f3357 MD |
168 | assert(rcu_read_ongoing()); |
169 | rcu_thread_offline(); | |
170 | assert(!rcu_read_ongoing()); | |
171 | rcu_thread_online(); | |
172 | ||
de10a585 MD |
173 | while (!test_go) |
174 | { | |
175 | } | |
176 | cmm_smp_mb(); | |
177 | ||
178 | for (;;) { | |
179 | rcu_read_lock(); | |
882f3357 | 180 | assert(rcu_read_ongoing()); |
de10a585 | 181 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 182 | rcu_debug_yield_read(); |
de10a585 | 183 | if (local_ptr) |
bcc74df3 | 184 | assert(*local_ptr == 8); |
a0b7f7ea | 185 | if (caa_unlikely(rduration)) |
de10a585 MD |
186 | loop_sleep(rduration); |
187 | rcu_read_unlock(); | |
bd252a04 | 188 | URCU_TLS(nr_reads)++; |
de10a585 | 189 | /* QS each 1024 reads */ |
bd252a04 | 190 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 191 | rcu_quiescent_state(); |
a0b7f7ea | 192 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
193 | break; |
194 | } | |
195 | ||
196 | rcu_unregister_thread(); | |
197 | ||
198 | /* test extra thread registration */ | |
199 | rcu_register_thread(); | |
200 | rcu_unregister_thread(); | |
201 | ||
bd252a04 | 202 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
203 | printf_verbose("thread_end %s, tid %lu\n", |
204 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
205 | return ((void*)1); |
206 | ||
207 | } | |
208 | ||
209 | void *thr_writer(void *_count) | |
210 | { | |
211 | unsigned long long *count = _count; | |
bcc74df3 | 212 | int *new, *old; |
de10a585 | 213 | |
94df6318 MD |
214 | printf_verbose("thread_begin %s, tid %lu\n", |
215 | "writer", urcu_get_thread_id()); | |
de10a585 MD |
216 | |
217 | set_affinity(); | |
218 | ||
219 | while (!test_go) | |
220 | { | |
221 | } | |
222 | cmm_smp_mb(); | |
223 | ||
224 | for (;;) { | |
bcc74df3 MD |
225 | new = malloc(sizeof(int)); |
226 | assert(new); | |
227 | *new = 8; | |
de10a585 | 228 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 229 | if (caa_unlikely(wduration)) |
de10a585 MD |
230 | loop_sleep(wduration); |
231 | synchronize_rcu(); | |
de10a585 | 232 | if (old) |
bcc74df3 MD |
233 | *old = 0; |
234 | free(old); | |
bd252a04 | 235 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 236 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 237 | break; |
a0b7f7ea | 238 | if (caa_unlikely(wdelay)) |
de10a585 MD |
239 | loop_sleep(wdelay); |
240 | } | |
241 | ||
94df6318 MD |
242 | printf_verbose("thread_end %s, tid %lu\n", |
243 | "writer", urcu_get_thread_id()); | |
bd252a04 | 244 | *count = URCU_TLS(nr_writes); |
de10a585 MD |
245 | return ((void*)2); |
246 | } | |
247 | ||
248 | void show_usage(int argc, char **argv) | |
249 | { | |
06637138 MD |
250 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
251 | argv[0]); | |
252 | printf("OPTIONS:\n"); | |
06637138 | 253 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
254 | printf(" [-d delay] (writer period (us))\n"); |
255 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
256 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
257 | printf(" [-v] (verbose output)\n"); | |
258 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
de10a585 MD |
259 | printf("\n"); |
260 | } | |
261 | ||
262 | int main(int argc, char **argv) | |
263 | { | |
264 | int err; | |
265 | pthread_t *tid_reader, *tid_writer; | |
266 | void *tret; | |
267 | unsigned long long *count_reader, *count_writer; | |
268 | unsigned long long tot_reads = 0, tot_writes = 0; | |
269 | int i, a; | |
83e334d0 | 270 | unsigned int i_thr; |
de10a585 MD |
271 | |
272 | if (argc < 4) { | |
273 | show_usage(argc, argv); | |
274 | return -1; | |
275 | } | |
276 | ||
277 | err = sscanf(argv[1], "%u", &nr_readers); | |
278 | if (err != 1) { | |
279 | show_usage(argc, argv); | |
280 | return -1; | |
281 | } | |
282 | ||
283 | err = sscanf(argv[2], "%u", &nr_writers); | |
284 | if (err != 1) { | |
285 | show_usage(argc, argv); | |
286 | return -1; | |
287 | } | |
83e334d0 | 288 | |
de10a585 MD |
289 | err = sscanf(argv[3], "%lu", &duration); |
290 | if (err != 1) { | |
291 | show_usage(argc, argv); | |
292 | return -1; | |
293 | } | |
294 | ||
295 | for (i = 4; i < argc; i++) { | |
296 | if (argv[i][0] != '-') | |
297 | continue; | |
298 | switch (argv[i][1]) { | |
de10a585 | 299 | case 'r': |
2650042a | 300 | rcu_debug_yield_enable(RCU_YIELD_READ); |
de10a585 MD |
301 | break; |
302 | case 'w': | |
2650042a | 303 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
de10a585 | 304 | break; |
de10a585 MD |
305 | case 'a': |
306 | if (argc < i + 2) { | |
307 | show_usage(argc, argv); | |
308 | return -1; | |
309 | } | |
310 | a = atoi(argv[++i]); | |
311 | cpu_affinities[next_aff++] = a; | |
312 | use_affinity = 1; | |
313 | printf_verbose("Adding CPU %d affinity\n", a); | |
314 | break; | |
315 | case 'c': | |
316 | if (argc < i + 2) { | |
317 | show_usage(argc, argv); | |
318 | return -1; | |
319 | } | |
320 | rduration = atol(argv[++i]); | |
321 | break; | |
322 | case 'd': | |
323 | if (argc < i + 2) { | |
324 | show_usage(argc, argv); | |
325 | return -1; | |
326 | } | |
327 | wdelay = atol(argv[++i]); | |
328 | break; | |
329 | case 'e': | |
330 | if (argc < i + 2) { | |
331 | show_usage(argc, argv); | |
332 | return -1; | |
333 | } | |
334 | wduration = atol(argv[++i]); | |
335 | break; | |
336 | case 'v': | |
337 | verbose_mode = 1; | |
338 | break; | |
339 | } | |
340 | } | |
341 | ||
342 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
343 | duration, nr_readers, nr_writers); | |
344 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
345 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
346 | printf_verbose("thread %-6s, tid %lu\n", |
347 | "main", urcu_get_thread_id()); | |
de10a585 | 348 | |
9aa14175 MD |
349 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
350 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
351 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
352 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
de10a585 MD |
353 | |
354 | next_aff = 0; | |
355 | ||
83e334d0 MJ |
356 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
357 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
358 | &count_reader[i_thr]); | |
de10a585 MD |
359 | if (err != 0) |
360 | exit(1); | |
361 | } | |
83e334d0 MJ |
362 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
363 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
364 | &count_writer[i_thr]); | |
de10a585 MD |
365 | if (err != 0) |
366 | exit(1); | |
367 | } | |
368 | ||
369 | cmm_smp_mb(); | |
370 | ||
371 | test_go = 1; | |
372 | ||
373 | sleep(duration); | |
374 | ||
375 | test_stop = 1; | |
376 | ||
83e334d0 MJ |
377 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
378 | err = pthread_join(tid_reader[i_thr], &tret); | |
de10a585 MD |
379 | if (err != 0) |
380 | exit(1); | |
83e334d0 | 381 | tot_reads += count_reader[i_thr]; |
de10a585 | 382 | } |
83e334d0 MJ |
383 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
384 | err = pthread_join(tid_writer[i_thr], &tret); | |
de10a585 MD |
385 | if (err != 0) |
386 | exit(1); | |
83e334d0 | 387 | tot_writes += count_writer[i_thr]; |
de10a585 | 388 | } |
83e334d0 | 389 | |
de10a585 MD |
390 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
391 | tot_writes); | |
392 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
393 | "nr_writers %3u " | |
394 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
395 | argv[0], duration, nr_readers, rduration, wduration, | |
396 | nr_writers, wdelay, tot_reads, tot_writes, | |
397 | tot_reads + tot_writes); | |
bcc74df3 | 398 | free(test_rcu_pointer); |
de10a585 MD |
399 | free(tid_reader); |
400 | free(tid_writer); | |
401 | free(count_reader); | |
402 | free(count_writer); | |
403 | return 0; | |
404 | } |