Commit | Line | Data |
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fdee2e6d 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> |
fdee2e6d 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 | ||
fdee2e6d 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> |
fdee2e6d MD |
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" |
65fcc7e9 | 38 | |
fdee2e6d MD |
39 | /* hardcoded number of CPUs */ |
40 | #define NR_CPUS 16384 | |
41 | ||
fdee2e6d MD |
42 | #ifndef DYNAMIC_LINK_TEST |
43 | #define _LGPL_SOURCE | |
fdee2e6d MD |
44 | #endif |
45 | #include <urcu-bp.h> | |
46 | ||
fdee2e6d MD |
47 | static volatile int test_go, test_stop; |
48 | ||
49 | static unsigned long wdelay; | |
50 | ||
bcc74df3 | 51 | static int *test_rcu_pointer; |
fdee2e6d MD |
52 | |
53 | static unsigned long duration; | |
54 | ||
55 | /* read-side C.S. duration, in loops */ | |
56 | static unsigned long rduration; | |
57 | ||
31b598e0 MD |
58 | /* write-side C.S. duration, in loops */ |
59 | static unsigned long wduration; | |
60 | ||
ab0aacbe | 61 | static inline void loop_sleep(unsigned long loops) |
fdee2e6d | 62 | { |
ab0aacbe | 63 | while (loops-- != 0) |
06f22bdb | 64 | caa_cpu_relax(); |
fdee2e6d MD |
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 | ||
81 | static void set_affinity(void) | |
82 | { | |
95bc7fb9 | 83 | #if HAVE_SCHED_SETAFFINITY |
fdee2e6d | 84 | cpu_set_t mask; |
95bc7fb9 MD |
85 | int cpu, ret; |
86 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
87 | |
88 | if (!use_affinity) | |
89 | return; | |
90 | ||
d8540fc5 | 91 | #if HAVE_SCHED_SETAFFINITY |
fdee2e6d MD |
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 | } | |
d8540fc5 | 103 | |
fdee2e6d MD |
104 | CPU_ZERO(&mask); |
105 | CPU_SET(cpu, &mask); | |
106 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 107 | #endif /* HAVE_SCHED_SETAFFINITY */ |
fdee2e6d MD |
108 | } |
109 | ||
110 | /* | |
111 | * returns 0 if test should end. | |
112 | */ | |
113 | static int test_duration_write(void) | |
114 | { | |
115 | return !test_stop; | |
116 | } | |
117 | ||
118 | static int test_duration_read(void) | |
119 | { | |
120 | return !test_stop; | |
121 | } | |
122 | ||
bd252a04 MD |
123 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
124 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
fdee2e6d MD |
125 | |
126 | static unsigned int nr_readers; | |
127 | static unsigned int nr_writers; | |
128 | ||
129 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
130 | ||
131 | void rcu_copy_mutex_lock(void) | |
132 | { | |
133 | int ret; | |
134 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
135 | if (ret) { | |
136 | perror("Error in pthread mutex lock"); | |
137 | exit(-1); | |
138 | } | |
139 | } | |
140 | ||
141 | void rcu_copy_mutex_unlock(void) | |
142 | { | |
143 | int ret; | |
144 | ||
145 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
146 | if (ret) { | |
147 | perror("Error in pthread mutex unlock"); | |
148 | exit(-1); | |
149 | } | |
150 | } | |
151 | ||
fdee2e6d MD |
152 | void *thr_reader(void *_count) |
153 | { | |
154 | unsigned long long *count = _count; | |
bcc74df3 | 155 | int *local_ptr; |
fdee2e6d | 156 | |
94df6318 MD |
157 | printf_verbose("thread_begin %s, tid %lu\n", |
158 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
159 | |
160 | set_affinity(); | |
161 | ||
162 | rcu_register_thread(); | |
882f3357 | 163 | assert(!rcu_read_ongoing()); |
fdee2e6d MD |
164 | |
165 | while (!test_go) | |
166 | { | |
167 | } | |
5481ddb3 | 168 | cmm_smp_mb(); |
fdee2e6d MD |
169 | |
170 | for (;;) { | |
171 | rcu_read_lock(); | |
882f3357 | 172 | assert(rcu_read_ongoing()); |
fdee2e6d | 173 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 174 | rcu_debug_yield_read(); |
fdee2e6d | 175 | if (local_ptr) |
bcc74df3 | 176 | assert(*local_ptr == 8); |
a0b7f7ea | 177 | if (caa_unlikely(rduration)) |
fdee2e6d MD |
178 | loop_sleep(rduration); |
179 | rcu_read_unlock(); | |
bd252a04 | 180 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 181 | if (caa_unlikely(!test_duration_read())) |
fdee2e6d MD |
182 | break; |
183 | } | |
184 | ||
185 | rcu_unregister_thread(); | |
186 | ||
bd252a04 | 187 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
188 | printf_verbose("thread_end %s, tid %lu\n", |
189 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
190 | return ((void*)1); |
191 | ||
192 | } | |
193 | ||
194 | void *thr_writer(void *_count) | |
195 | { | |
196 | unsigned long long *count = _count; | |
bcc74df3 | 197 | int *new, *old; |
fdee2e6d | 198 | |
94df6318 MD |
199 | printf_verbose("thread_begin %s, tid %lu\n", |
200 | "writer", urcu_get_thread_id()); | |
fdee2e6d MD |
201 | |
202 | set_affinity(); | |
203 | ||
204 | while (!test_go) | |
205 | { | |
206 | } | |
5481ddb3 | 207 | cmm_smp_mb(); |
fdee2e6d MD |
208 | |
209 | for (;;) { | |
bcc74df3 MD |
210 | new = malloc(sizeof(int)); |
211 | *new = 8; | |
d2835e6f | 212 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 213 | if (caa_unlikely(wduration)) |
31b598e0 | 214 | loop_sleep(wduration); |
d2835e6f | 215 | synchronize_rcu(); |
fdee2e6d | 216 | if (old) |
bcc74df3 MD |
217 | *old = 0; |
218 | free(old); | |
bd252a04 | 219 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 220 | if (caa_unlikely(!test_duration_write())) |
fdee2e6d | 221 | break; |
a0b7f7ea | 222 | if (caa_unlikely(wdelay)) |
fdee2e6d MD |
223 | loop_sleep(wdelay); |
224 | } | |
225 | ||
94df6318 MD |
226 | printf_verbose("thread_end %s, tid %lu\n", |
227 | "writer", urcu_get_thread_id()); | |
bd252a04 | 228 | *count = URCU_TLS(nr_writes); |
fdee2e6d MD |
229 | return ((void*)2); |
230 | } | |
231 | ||
232 | void show_usage(int argc, char **argv) | |
233 | { | |
06637138 MD |
234 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
235 | argv[0]); | |
236 | printf("OPTIONS:\n"); | |
06637138 | 237 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
238 | printf(" [-d delay] (writer period (us))\n"); |
239 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
240 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
241 | printf(" [-v] (verbose output)\n"); | |
242 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
fdee2e6d MD |
243 | printf("\n"); |
244 | } | |
245 | ||
246 | int main(int argc, char **argv) | |
247 | { | |
248 | int err; | |
249 | pthread_t *tid_reader, *tid_writer; | |
250 | void *tret; | |
251 | unsigned long long *count_reader, *count_writer; | |
252 | unsigned long long tot_reads = 0, tot_writes = 0; | |
253 | int i, a; | |
83e334d0 | 254 | unsigned int i_thr; |
fdee2e6d MD |
255 | |
256 | if (argc < 4) { | |
257 | show_usage(argc, argv); | |
258 | return -1; | |
259 | } | |
260 | ||
261 | err = sscanf(argv[1], "%u", &nr_readers); | |
262 | if (err != 1) { | |
263 | show_usage(argc, argv); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | err = sscanf(argv[2], "%u", &nr_writers); | |
268 | if (err != 1) { | |
269 | show_usage(argc, argv); | |
270 | return -1; | |
271 | } | |
83e334d0 | 272 | |
fdee2e6d MD |
273 | err = sscanf(argv[3], "%lu", &duration); |
274 | if (err != 1) { | |
275 | show_usage(argc, argv); | |
276 | return -1; | |
277 | } | |
278 | ||
279 | for (i = 4; i < argc; i++) { | |
280 | if (argv[i][0] != '-') | |
281 | continue; | |
282 | switch (argv[i][1]) { | |
fdee2e6d | 283 | case 'r': |
2650042a | 284 | rcu_debug_yield_enable(RCU_YIELD_READ); |
fdee2e6d MD |
285 | break; |
286 | case 'w': | |
2650042a | 287 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
fdee2e6d | 288 | break; |
fdee2e6d MD |
289 | case 'a': |
290 | if (argc < i + 2) { | |
291 | show_usage(argc, argv); | |
292 | return -1; | |
293 | } | |
294 | a = atoi(argv[++i]); | |
295 | cpu_affinities[next_aff++] = a; | |
296 | use_affinity = 1; | |
297 | printf_verbose("Adding CPU %d affinity\n", a); | |
298 | break; | |
299 | case 'c': | |
300 | if (argc < i + 2) { | |
301 | show_usage(argc, argv); | |
302 | return -1; | |
303 | } | |
304 | rduration = atol(argv[++i]); | |
305 | break; | |
306 | case 'd': | |
307 | if (argc < i + 2) { | |
308 | show_usage(argc, argv); | |
309 | return -1; | |
310 | } | |
311 | wdelay = atol(argv[++i]); | |
312 | break; | |
31b598e0 MD |
313 | case 'e': |
314 | if (argc < i + 2) { | |
315 | show_usage(argc, argv); | |
316 | return -1; | |
317 | } | |
318 | wduration = atol(argv[++i]); | |
319 | break; | |
fdee2e6d MD |
320 | case 'v': |
321 | verbose_mode = 1; | |
322 | break; | |
323 | } | |
324 | } | |
325 | ||
326 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
327 | duration, nr_readers, nr_writers); | |
328 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
329 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
330 | printf_verbose("thread %-6s, tid %lu\n", |
331 | "main", urcu_get_thread_id()); | |
fdee2e6d | 332 | |
9aa14175 MD |
333 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
334 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
335 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
336 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
fdee2e6d MD |
337 | |
338 | next_aff = 0; | |
339 | ||
83e334d0 MJ |
340 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
341 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
342 | &count_reader[i_thr]); | |
fdee2e6d MD |
343 | if (err != 0) |
344 | exit(1); | |
345 | } | |
83e334d0 MJ |
346 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
347 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
348 | &count_writer[i_thr]); | |
fdee2e6d MD |
349 | if (err != 0) |
350 | exit(1); | |
351 | } | |
352 | ||
5481ddb3 | 353 | cmm_smp_mb(); |
fdee2e6d MD |
354 | |
355 | test_go = 1; | |
356 | ||
357 | sleep(duration); | |
358 | ||
359 | test_stop = 1; | |
360 | ||
83e334d0 MJ |
361 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
362 | err = pthread_join(tid_reader[i_thr], &tret); | |
fdee2e6d MD |
363 | if (err != 0) |
364 | exit(1); | |
83e334d0 | 365 | tot_reads += count_reader[i_thr]; |
fdee2e6d | 366 | } |
83e334d0 MJ |
367 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
368 | err = pthread_join(tid_writer[i_thr], &tret); | |
fdee2e6d MD |
369 | if (err != 0) |
370 | exit(1); | |
83e334d0 | 371 | tot_writes += count_writer[i_thr]; |
fdee2e6d | 372 | } |
83e334d0 | 373 | |
fdee2e6d MD |
374 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
375 | tot_writes); | |
a50a7b43 | 376 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
fdee2e6d MD |
377 | "nr_writers %3u " |
378 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 379 | argv[0], duration, nr_readers, rduration, wduration, |
fdee2e6d MD |
380 | nr_writers, wdelay, tot_reads, tot_writes, |
381 | tot_reads + tot_writes); | |
83e334d0 | 382 | |
bcc74df3 | 383 | free(test_rcu_pointer); |
fdee2e6d MD |
384 | free(tid_reader); |
385 | free(tid_writer); | |
386 | free(count_reader); | |
387 | free(count_writer); | |
83e334d0 | 388 | |
fdee2e6d MD |
389 | return 0; |
390 | } |