Commit | Line | Data |
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0ee8bb0a 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> |
0ee8bb0a 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 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
f5ab766e | 24 | #include "config.h" |
0ee8bb0a 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> |
0ee8bb0a | 35 | |
ec4e58a3 | 36 | #include <urcu/arch.h> |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
2953b501 | 38 | #include "cpuset.h" |
94df6318 | 39 | #include "thread-id.h" |
65fcc7e9 | 40 | |
2a7ac59d MD |
41 | /* hardcoded number of CPUs */ |
42 | #define NR_CPUS 16384 | |
43 | ||
0ee8bb0a MD |
44 | #ifndef DYNAMIC_LINK_TEST |
45 | #define _LGPL_SOURCE | |
0ee8bb0a | 46 | #endif |
ec4e58a3 | 47 | #include <urcu.h> |
0ee8bb0a MD |
48 | |
49 | struct test_array { | |
50 | int a; | |
51 | }; | |
52 | ||
53 | struct per_thread_lock { | |
54 | pthread_mutex_t lock; | |
06f22bdb | 55 | } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */ |
0ee8bb0a MD |
56 | |
57 | static struct per_thread_lock *per_thread_lock; | |
58 | ||
78efb485 | 59 | static volatile int test_go, test_stop; |
0ee8bb0a | 60 | |
9e31d0f0 | 61 | static unsigned long wdelay; |
0ee8bb0a | 62 | |
2b4e4125 | 63 | static volatile struct test_array test_array = { 8 }; |
0ee8bb0a MD |
64 | |
65 | static unsigned long duration; | |
0ee8bb0a | 66 | |
daddf5b0 | 67 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
68 | static unsigned long rduration; |
69 | ||
31b598e0 MD |
70 | /* write-side C.S. duration, in loops */ |
71 | static unsigned long wduration; | |
72 | ||
ab0aacbe | 73 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 74 | { |
ab0aacbe | 75 | while (loops-- != 0) |
06f22bdb | 76 | caa_cpu_relax(); |
daddf5b0 MD |
77 | } |
78 | ||
4bad7d45 MD |
79 | static int verbose_mode; |
80 | ||
81 | #define printf_verbose(fmt, args...) \ | |
82 | do { \ | |
83 | if (verbose_mode) \ | |
84 | printf(fmt, args); \ | |
85 | } while (0) | |
86 | ||
2a7ac59d MD |
87 | static unsigned int cpu_affinities[NR_CPUS]; |
88 | static unsigned int next_aff = 0; | |
89 | static int use_affinity = 0; | |
90 | ||
6af882ba MD |
91 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
92 | ||
2a7ac59d MD |
93 | static void set_affinity(void) |
94 | { | |
95bc7fb9 | 95 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 96 | cpu_set_t mask; |
95bc7fb9 MD |
97 | int cpu, ret; |
98 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
99 | |
100 | if (!use_affinity) | |
101 | return; | |
102 | ||
d8540fc5 | 103 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
104 | ret = pthread_mutex_lock(&affinity_mutex); |
105 | if (ret) { | |
106 | perror("Error in pthread mutex lock"); | |
107 | exit(-1); | |
108 | } | |
2a7ac59d | 109 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
110 | ret = pthread_mutex_unlock(&affinity_mutex); |
111 | if (ret) { | |
112 | perror("Error in pthread mutex unlock"); | |
113 | exit(-1); | |
114 | } | |
2a7ac59d MD |
115 | CPU_ZERO(&mask); |
116 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
117 | #if SCHED_SETAFFINITY_ARGS == 2 |
118 | sched_setaffinity(0, &mask); | |
119 | #else | |
2a7ac59d | 120 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
121 | #endif |
122 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
123 | } |
124 | ||
0ee8bb0a MD |
125 | /* |
126 | * returns 0 if test should end. | |
127 | */ | |
128 | static int test_duration_write(void) | |
129 | { | |
78efb485 | 130 | return !test_stop; |
0ee8bb0a MD |
131 | } |
132 | ||
133 | static int test_duration_read(void) | |
134 | { | |
78efb485 | 135 | return !test_stop; |
0ee8bb0a MD |
136 | } |
137 | ||
bd252a04 MD |
138 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
139 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
0ee8bb0a | 140 | |
55271c13 | 141 | static |
06f22bdb | 142 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 143 | static |
06f22bdb | 144 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
145 | |
146 | static unsigned int nr_readers; | |
147 | static unsigned int nr_writers; | |
148 | ||
149 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
150 | ||
151 | void rcu_copy_mutex_lock(void) | |
152 | { | |
153 | int ret; | |
154 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
155 | if (ret) { | |
156 | perror("Error in pthread mutex lock"); | |
157 | exit(-1); | |
158 | } | |
159 | } | |
160 | ||
161 | void rcu_copy_mutex_unlock(void) | |
162 | { | |
163 | int ret; | |
164 | ||
165 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
166 | if (ret) { | |
167 | perror("Error in pthread mutex unlock"); | |
168 | exit(-1); | |
169 | } | |
170 | } | |
171 | ||
172 | void *thr_reader(void *data) | |
173 | { | |
174 | unsigned long tidx = (unsigned long)data; | |
175 | ||
94df6318 MD |
176 | printf_verbose("thread_begin %s, tid %lu\n", |
177 | "reader", urcu_get_thread_id()); | |
0ee8bb0a | 178 | |
2a7ac59d MD |
179 | set_affinity(); |
180 | ||
0ee8bb0a MD |
181 | while (!test_go) |
182 | { | |
183 | } | |
184 | ||
185 | for (;;) { | |
19d0e7ef MD |
186 | int v; |
187 | ||
0ee8bb0a | 188 | pthread_mutex_lock(&per_thread_lock[tidx].lock); |
19d0e7ef MD |
189 | v = test_array.a; |
190 | assert(v == 8); | |
a0b7f7ea | 191 | if (caa_unlikely(rduration)) |
daddf5b0 | 192 | loop_sleep(rduration); |
0ee8bb0a | 193 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
bd252a04 | 194 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 195 | if (caa_unlikely(!test_duration_read())) |
0ee8bb0a MD |
196 | break; |
197 | } | |
198 | ||
bd252a04 | 199 | tot_nr_reads[tidx] = URCU_TLS(nr_reads); |
94df6318 MD |
200 | printf_verbose("thread_end %s, tid %lu\n", |
201 | "reader", urcu_get_thread_id()); | |
0ee8bb0a MD |
202 | return ((void*)1); |
203 | ||
204 | } | |
205 | ||
206 | void *thr_writer(void *data) | |
207 | { | |
208 | unsigned long wtidx = (unsigned long)data; | |
209 | long tidx; | |
210 | ||
94df6318 MD |
211 | printf_verbose("thread_begin %s, tid %lu\n", |
212 | "writer", urcu_get_thread_id()); | |
0ee8bb0a | 213 | |
2a7ac59d MD |
214 | set_affinity(); |
215 | ||
0ee8bb0a MD |
216 | while (!test_go) |
217 | { | |
218 | } | |
5481ddb3 | 219 | cmm_smp_mb(); |
0ee8bb0a MD |
220 | |
221 | for (;;) { | |
222 | for (tidx = 0; tidx < nr_readers; tidx++) { | |
223 | pthread_mutex_lock(&per_thread_lock[tidx].lock); | |
224 | } | |
2b4e4125 | 225 | test_array.a = 0; |
0ee8bb0a | 226 | test_array.a = 8; |
a0b7f7ea | 227 | if (caa_unlikely(wduration)) |
31b598e0 | 228 | loop_sleep(wduration); |
f120cc10 | 229 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
0ee8bb0a MD |
230 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
231 | } | |
bd252a04 | 232 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 233 | if (caa_unlikely(!test_duration_write())) |
0ee8bb0a | 234 | break; |
a0b7f7ea | 235 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 236 | loop_sleep(wdelay); |
0ee8bb0a MD |
237 | } |
238 | ||
94df6318 MD |
239 | printf_verbose("thread_end %s, tid %lu\n", |
240 | "writer", urcu_get_thread_id()); | |
bd252a04 | 241 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
0ee8bb0a MD |
242 | return ((void*)2); |
243 | } | |
244 | ||
245 | void show_usage(int argc, char **argv) | |
246 | { | |
06637138 MD |
247 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
248 | argv[0]); | |
249 | printf("OPTIONS:\n"); | |
06637138 MD |
250 | printf(" [-d delay] (writer period (us))\n"); |
251 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
252 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
253 | printf(" [-v] (verbose output)\n"); | |
254 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
0ee8bb0a MD |
255 | printf("\n"); |
256 | } | |
257 | ||
258 | int main(int argc, char **argv) | |
259 | { | |
260 | int err; | |
261 | pthread_t *tid_reader, *tid_writer; | |
262 | void *tret; | |
0ee8bb0a | 263 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 264 | int i, a; |
0ee8bb0a MD |
265 | |
266 | if (argc < 4) { | |
267 | show_usage(argc, argv); | |
268 | return -1; | |
269 | } | |
5481ddb3 | 270 | cmm_smp_mb(); |
0ee8bb0a MD |
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 | } | |
283 | ||
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]) { | |
9e97e478 MD |
294 | case 'a': |
295 | if (argc < i + 2) { | |
296 | show_usage(argc, argv); | |
297 | return -1; | |
298 | } | |
299 | a = atoi(argv[++i]); | |
2a7ac59d | 300 | cpu_affinities[next_aff++] = a; |
9e97e478 | 301 | use_affinity = 1; |
4bad7d45 | 302 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 303 | break; |
8b632bab MD |
304 | case 'c': |
305 | if (argc < i + 2) { | |
306 | show_usage(argc, argv); | |
307 | return -1; | |
308 | } | |
9e31d0f0 | 309 | rduration = atol(argv[++i]); |
8b632bab | 310 | break; |
0ee8bb0a MD |
311 | case 'd': |
312 | if (argc < i + 2) { | |
313 | show_usage(argc, argv); | |
314 | return -1; | |
315 | } | |
9e31d0f0 | 316 | wdelay = atol(argv[++i]); |
0ee8bb0a | 317 | break; |
31b598e0 MD |
318 | case 'e': |
319 | if (argc < i + 2) { | |
320 | show_usage(argc, argv); | |
321 | return -1; | |
322 | } | |
323 | wduration = atol(argv[++i]); | |
324 | break; | |
4bad7d45 MD |
325 | case 'v': |
326 | verbose_mode = 1; | |
327 | break; | |
0ee8bb0a MD |
328 | } |
329 | } | |
330 | ||
4bad7d45 | 331 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 332 | duration, nr_readers, nr_writers); |
9e31d0f0 | 333 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 334 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
335 | printf_verbose("thread %-6s, tid %lu\n", |
336 | "main", urcu_get_thread_id()); | |
0ee8bb0a | 337 | |
9aa14175 MD |
338 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
339 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
340 | tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads)); | |
341 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
342 | per_thread_lock = calloc(nr_readers, sizeof(*per_thread_lock)); | |
dee09338 MD |
343 | for (i = 0; i < nr_readers; i++) { |
344 | err = pthread_mutex_init(&per_thread_lock[i].lock, NULL); | |
345 | if (err != 0) | |
346 | exit(1); | |
347 | } | |
0ee8bb0a | 348 | |
2a7ac59d MD |
349 | next_aff = 0; |
350 | ||
0ee8bb0a MD |
351 | for (i = 0; i < nr_readers; i++) { |
352 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
353 | (void *)(long)i); | |
354 | if (err != 0) | |
355 | exit(1); | |
356 | } | |
357 | for (i = 0; i < nr_writers; i++) { | |
358 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
359 | (void *)(long)i); | |
360 | if (err != 0) | |
361 | exit(1); | |
362 | } | |
363 | ||
5481ddb3 | 364 | cmm_smp_mb(); |
0ee8bb0a | 365 | |
78efb485 MD |
366 | test_go = 1; |
367 | ||
368 | sleep(duration); | |
369 | ||
370 | test_stop = 1; | |
371 | ||
0ee8bb0a MD |
372 | for (i = 0; i < nr_readers; i++) { |
373 | err = pthread_join(tid_reader[i], &tret); | |
374 | if (err != 0) | |
375 | exit(1); | |
376 | tot_reads += tot_nr_reads[i]; | |
377 | } | |
378 | for (i = 0; i < nr_writers; i++) { | |
379 | err = pthread_join(tid_writer[i], &tret); | |
380 | if (err != 0) | |
381 | exit(1); | |
382 | tot_writes += tot_nr_writes[i]; | |
383 | } | |
4bad7d45 MD |
384 | |
385 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 386 | tot_writes); |
a50a7b43 | 387 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 388 | "nr_writers %3u " |
9e31d0f0 | 389 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 390 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
391 | nr_writers, wdelay, tot_reads, tot_writes, |
392 | tot_reads + tot_writes); | |
393 | ||
0ee8bb0a MD |
394 | free(tid_reader); |
395 | free(tid_writer); | |
0ee8bb0a MD |
396 | free(tot_nr_reads); |
397 | free(tot_nr_writes); | |
398 | free(per_thread_lock); | |
399 | return 0; | |
400 | } |