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 | ||
23 | #define _GNU_SOURCE | |
f5ab766e | 24 | #include "config.h" |
fdee2e6d 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> |
fdee2e6d MD |
35 | |
36 | #include <urcu/arch.h> | |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
2953b501 | 38 | #include "cpuset.h" |
94df6318 | 39 | #include "thread-id.h" |
2650042a | 40 | #include "../common/debug-yield.h" |
65fcc7e9 | 41 | |
fdee2e6d MD |
42 | /* hardcoded number of CPUs */ |
43 | #define NR_CPUS 16384 | |
44 | ||
fdee2e6d MD |
45 | #ifndef DYNAMIC_LINK_TEST |
46 | #define _LGPL_SOURCE | |
fdee2e6d MD |
47 | #endif |
48 | #include <urcu-bp.h> | |
49 | ||
fdee2e6d MD |
50 | static volatile int test_go, test_stop; |
51 | ||
52 | static unsigned long wdelay; | |
53 | ||
bcc74df3 | 54 | static int *test_rcu_pointer; |
fdee2e6d MD |
55 | |
56 | static unsigned long duration; | |
57 | ||
58 | /* read-side C.S. duration, in loops */ | |
59 | static unsigned long rduration; | |
60 | ||
31b598e0 MD |
61 | /* write-side C.S. duration, in loops */ |
62 | static unsigned long wduration; | |
63 | ||
ab0aacbe | 64 | static inline void loop_sleep(unsigned long loops) |
fdee2e6d | 65 | { |
ab0aacbe | 66 | while (loops-- != 0) |
06f22bdb | 67 | caa_cpu_relax(); |
fdee2e6d MD |
68 | } |
69 | ||
70 | static int verbose_mode; | |
71 | ||
72 | #define printf_verbose(fmt, args...) \ | |
73 | do { \ | |
74 | if (verbose_mode) \ | |
75 | printf(fmt, args); \ | |
76 | } while (0) | |
77 | ||
78 | static unsigned int cpu_affinities[NR_CPUS]; | |
79 | static unsigned int next_aff = 0; | |
80 | static int use_affinity = 0; | |
81 | ||
82 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
83 | ||
84 | static void set_affinity(void) | |
85 | { | |
95bc7fb9 | 86 | #if HAVE_SCHED_SETAFFINITY |
fdee2e6d | 87 | cpu_set_t mask; |
95bc7fb9 MD |
88 | int cpu, ret; |
89 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
90 | |
91 | if (!use_affinity) | |
92 | return; | |
93 | ||
d8540fc5 | 94 | #if HAVE_SCHED_SETAFFINITY |
fdee2e6d MD |
95 | ret = pthread_mutex_lock(&affinity_mutex); |
96 | if (ret) { | |
97 | perror("Error in pthread mutex lock"); | |
98 | exit(-1); | |
99 | } | |
100 | cpu = cpu_affinities[next_aff++]; | |
101 | ret = pthread_mutex_unlock(&affinity_mutex); | |
102 | if (ret) { | |
103 | perror("Error in pthread mutex unlock"); | |
104 | exit(-1); | |
105 | } | |
d8540fc5 | 106 | |
fdee2e6d MD |
107 | CPU_ZERO(&mask); |
108 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
109 | #if SCHED_SETAFFINITY_ARGS == 2 |
110 | sched_setaffinity(0, &mask); | |
111 | #else | |
fdee2e6d | 112 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
113 | #endif |
114 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
115 | } |
116 | ||
117 | /* | |
118 | * returns 0 if test should end. | |
119 | */ | |
120 | static int test_duration_write(void) | |
121 | { | |
122 | return !test_stop; | |
123 | } | |
124 | ||
125 | static int test_duration_read(void) | |
126 | { | |
127 | return !test_stop; | |
128 | } | |
129 | ||
bd252a04 MD |
130 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
131 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
fdee2e6d MD |
132 | |
133 | static unsigned int nr_readers; | |
134 | static unsigned int nr_writers; | |
135 | ||
136 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
137 | ||
138 | void rcu_copy_mutex_lock(void) | |
139 | { | |
140 | int ret; | |
141 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
142 | if (ret) { | |
143 | perror("Error in pthread mutex lock"); | |
144 | exit(-1); | |
145 | } | |
146 | } | |
147 | ||
148 | void rcu_copy_mutex_unlock(void) | |
149 | { | |
150 | int ret; | |
151 | ||
152 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
153 | if (ret) { | |
154 | perror("Error in pthread mutex unlock"); | |
155 | exit(-1); | |
156 | } | |
157 | } | |
158 | ||
fdee2e6d MD |
159 | void *thr_reader(void *_count) |
160 | { | |
161 | unsigned long long *count = _count; | |
bcc74df3 | 162 | int *local_ptr; |
fdee2e6d | 163 | |
94df6318 MD |
164 | printf_verbose("thread_begin %s, tid %lu\n", |
165 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
166 | |
167 | set_affinity(); | |
168 | ||
169 | rcu_register_thread(); | |
882f3357 | 170 | assert(!rcu_read_ongoing()); |
fdee2e6d MD |
171 | |
172 | while (!test_go) | |
173 | { | |
174 | } | |
5481ddb3 | 175 | cmm_smp_mb(); |
fdee2e6d MD |
176 | |
177 | for (;;) { | |
178 | rcu_read_lock(); | |
882f3357 | 179 | assert(rcu_read_ongoing()); |
fdee2e6d | 180 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 181 | rcu_debug_yield_read(); |
fdee2e6d | 182 | if (local_ptr) |
bcc74df3 | 183 | assert(*local_ptr == 8); |
a0b7f7ea | 184 | if (caa_unlikely(rduration)) |
fdee2e6d MD |
185 | loop_sleep(rduration); |
186 | rcu_read_unlock(); | |
bd252a04 | 187 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 188 | if (caa_unlikely(!test_duration_read())) |
fdee2e6d MD |
189 | break; |
190 | } | |
191 | ||
192 | rcu_unregister_thread(); | |
193 | ||
bd252a04 | 194 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
195 | printf_verbose("thread_end %s, tid %lu\n", |
196 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
197 | return ((void*)1); |
198 | ||
199 | } | |
200 | ||
201 | void *thr_writer(void *_count) | |
202 | { | |
203 | unsigned long long *count = _count; | |
bcc74df3 | 204 | int *new, *old; |
fdee2e6d | 205 | |
94df6318 MD |
206 | printf_verbose("thread_begin %s, tid %lu\n", |
207 | "writer", urcu_get_thread_id()); | |
fdee2e6d MD |
208 | |
209 | set_affinity(); | |
210 | ||
211 | while (!test_go) | |
212 | { | |
213 | } | |
5481ddb3 | 214 | cmm_smp_mb(); |
fdee2e6d MD |
215 | |
216 | for (;;) { | |
bcc74df3 MD |
217 | new = malloc(sizeof(int)); |
218 | *new = 8; | |
d2835e6f | 219 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 220 | if (caa_unlikely(wduration)) |
31b598e0 | 221 | loop_sleep(wduration); |
d2835e6f | 222 | synchronize_rcu(); |
fdee2e6d | 223 | if (old) |
bcc74df3 MD |
224 | *old = 0; |
225 | free(old); | |
bd252a04 | 226 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 227 | if (caa_unlikely(!test_duration_write())) |
fdee2e6d | 228 | break; |
a0b7f7ea | 229 | if (caa_unlikely(wdelay)) |
fdee2e6d MD |
230 | loop_sleep(wdelay); |
231 | } | |
232 | ||
94df6318 MD |
233 | printf_verbose("thread_end %s, tid %lu\n", |
234 | "writer", urcu_get_thread_id()); | |
bd252a04 | 235 | *count = URCU_TLS(nr_writes); |
fdee2e6d MD |
236 | return ((void*)2); |
237 | } | |
238 | ||
239 | void show_usage(int argc, char **argv) | |
240 | { | |
06637138 MD |
241 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
242 | argv[0]); | |
243 | printf("OPTIONS:\n"); | |
06637138 | 244 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
245 | printf(" [-d delay] (writer period (us))\n"); |
246 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
247 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
248 | printf(" [-v] (verbose output)\n"); | |
249 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
fdee2e6d MD |
250 | printf("\n"); |
251 | } | |
252 | ||
253 | int main(int argc, char **argv) | |
254 | { | |
255 | int err; | |
256 | pthread_t *tid_reader, *tid_writer; | |
257 | void *tret; | |
258 | unsigned long long *count_reader, *count_writer; | |
259 | unsigned long long tot_reads = 0, tot_writes = 0; | |
260 | int i, a; | |
261 | ||
262 | if (argc < 4) { | |
263 | show_usage(argc, argv); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | err = sscanf(argv[1], "%u", &nr_readers); | |
268 | if (err != 1) { | |
269 | show_usage(argc, argv); | |
270 | return -1; | |
271 | } | |
272 | ||
273 | err = sscanf(argv[2], "%u", &nr_writers); | |
274 | if (err != 1) { | |
275 | show_usage(argc, argv); | |
276 | return -1; | |
277 | } | |
278 | ||
279 | err = sscanf(argv[3], "%lu", &duration); | |
280 | if (err != 1) { | |
281 | show_usage(argc, argv); | |
282 | return -1; | |
283 | } | |
284 | ||
285 | for (i = 4; i < argc; i++) { | |
286 | if (argv[i][0] != '-') | |
287 | continue; | |
288 | switch (argv[i][1]) { | |
fdee2e6d | 289 | case 'r': |
2650042a | 290 | rcu_debug_yield_enable(RCU_YIELD_READ); |
fdee2e6d MD |
291 | break; |
292 | case 'w': | |
2650042a | 293 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
fdee2e6d | 294 | break; |
fdee2e6d MD |
295 | case 'a': |
296 | if (argc < i + 2) { | |
297 | show_usage(argc, argv); | |
298 | return -1; | |
299 | } | |
300 | a = atoi(argv[++i]); | |
301 | cpu_affinities[next_aff++] = a; | |
302 | use_affinity = 1; | |
303 | printf_verbose("Adding CPU %d affinity\n", a); | |
304 | break; | |
305 | case 'c': | |
306 | if (argc < i + 2) { | |
307 | show_usage(argc, argv); | |
308 | return -1; | |
309 | } | |
310 | rduration = atol(argv[++i]); | |
311 | break; | |
312 | case 'd': | |
313 | if (argc < i + 2) { | |
314 | show_usage(argc, argv); | |
315 | return -1; | |
316 | } | |
317 | wdelay = atol(argv[++i]); | |
318 | break; | |
31b598e0 MD |
319 | case 'e': |
320 | if (argc < i + 2) { | |
321 | show_usage(argc, argv); | |
322 | return -1; | |
323 | } | |
324 | wduration = atol(argv[++i]); | |
325 | break; | |
fdee2e6d MD |
326 | case 'v': |
327 | verbose_mode = 1; | |
328 | break; | |
329 | } | |
330 | } | |
331 | ||
332 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
333 | duration, nr_readers, nr_writers); | |
334 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
335 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
336 | printf_verbose("thread %-6s, tid %lu\n", |
337 | "main", urcu_get_thread_id()); | |
fdee2e6d | 338 | |
9aa14175 MD |
339 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
340 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
341 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
342 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
fdee2e6d MD |
343 | |
344 | next_aff = 0; | |
345 | ||
346 | for (i = 0; i < nr_readers; i++) { | |
347 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
348 | &count_reader[i]); | |
349 | if (err != 0) | |
350 | exit(1); | |
351 | } | |
352 | for (i = 0; i < nr_writers; i++) { | |
353 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
354 | &count_writer[i]); | |
355 | if (err != 0) | |
356 | exit(1); | |
357 | } | |
358 | ||
5481ddb3 | 359 | cmm_smp_mb(); |
fdee2e6d MD |
360 | |
361 | test_go = 1; | |
362 | ||
363 | sleep(duration); | |
364 | ||
365 | test_stop = 1; | |
366 | ||
367 | for (i = 0; i < nr_readers; i++) { | |
368 | err = pthread_join(tid_reader[i], &tret); | |
369 | if (err != 0) | |
370 | exit(1); | |
371 | tot_reads += count_reader[i]; | |
372 | } | |
373 | for (i = 0; i < nr_writers; i++) { | |
374 | err = pthread_join(tid_writer[i], &tret); | |
375 | if (err != 0) | |
376 | exit(1); | |
377 | tot_writes += count_writer[i]; | |
378 | } | |
379 | ||
380 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
381 | tot_writes); | |
a50a7b43 | 382 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
fdee2e6d MD |
383 | "nr_writers %3u " |
384 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 385 | argv[0], duration, nr_readers, rduration, wduration, |
fdee2e6d MD |
386 | nr_writers, wdelay, tot_reads, tot_writes, |
387 | tot_reads + tot_writes); | |
bcc74df3 | 388 | free(test_rcu_pointer); |
fdee2e6d MD |
389 | free(tid_reader); |
390 | free(tid_writer); | |
391 | free(count_reader); | |
392 | free(count_writer); | |
393 | return 0; | |
394 | } |