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) { | |
f597a8b9 | 106 | errno = ret; |
6af882ba | 107 | perror("Error in pthread mutex lock"); |
f597a8b9 | 108 | abort(); |
6af882ba | 109 | } |
2a7ac59d | 110 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
111 | ret = pthread_mutex_unlock(&affinity_mutex); |
112 | if (ret) { | |
f597a8b9 | 113 | errno = ret; |
6af882ba | 114 | perror("Error in pthread mutex unlock"); |
f597a8b9 | 115 | abort(); |
6af882ba | 116 | } |
2a7ac59d MD |
117 | CPU_ZERO(&mask); |
118 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
119 | #if SCHED_SETAFFINITY_ARGS == 2 |
120 | sched_setaffinity(0, &mask); | |
121 | #else | |
2a7ac59d | 122 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
123 | #endif |
124 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
125 | } |
126 | ||
0ee8bb0a MD |
127 | /* |
128 | * returns 0 if test should end. | |
129 | */ | |
130 | static int test_duration_write(void) | |
131 | { | |
78efb485 | 132 | return !test_stop; |
0ee8bb0a MD |
133 | } |
134 | ||
135 | static int test_duration_read(void) | |
136 | { | |
78efb485 | 137 | return !test_stop; |
0ee8bb0a MD |
138 | } |
139 | ||
bd252a04 MD |
140 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
141 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
0ee8bb0a | 142 | |
55271c13 | 143 | static |
06f22bdb | 144 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 145 | static |
06f22bdb | 146 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
147 | |
148 | static unsigned int nr_readers; | |
149 | static unsigned int nr_writers; | |
150 | ||
f597a8b9 | 151 | static void urcu_mutex_lock(pthread_mutex_t *lock) |
0ee8bb0a MD |
152 | { |
153 | int ret; | |
f597a8b9 MD |
154 | |
155 | ret = pthread_mutex_lock(lock); | |
0ee8bb0a | 156 | if (ret) { |
f597a8b9 | 157 | errno = ret; |
0ee8bb0a | 158 | perror("Error in pthread mutex lock"); |
f597a8b9 | 159 | abort(); |
0ee8bb0a MD |
160 | } |
161 | } | |
162 | ||
f597a8b9 | 163 | static void urcu_mutex_unlock(pthread_mutex_t *lock) |
0ee8bb0a MD |
164 | { |
165 | int ret; | |
166 | ||
f597a8b9 | 167 | ret = pthread_mutex_unlock(lock); |
0ee8bb0a | 168 | if (ret) { |
f597a8b9 | 169 | errno = ret; |
0ee8bb0a | 170 | perror("Error in pthread mutex unlock"); |
f597a8b9 | 171 | abort(); |
0ee8bb0a MD |
172 | } |
173 | } | |
174 | ||
175 | void *thr_reader(void *data) | |
176 | { | |
177 | unsigned long tidx = (unsigned long)data; | |
178 | ||
94df6318 MD |
179 | printf_verbose("thread_begin %s, tid %lu\n", |
180 | "reader", urcu_get_thread_id()); | |
0ee8bb0a | 181 | |
2a7ac59d MD |
182 | set_affinity(); |
183 | ||
0ee8bb0a MD |
184 | while (!test_go) |
185 | { | |
186 | } | |
187 | ||
188 | for (;;) { | |
19d0e7ef MD |
189 | int v; |
190 | ||
f597a8b9 | 191 | urcu_mutex_lock(&per_thread_lock[tidx].lock); |
19d0e7ef MD |
192 | v = test_array.a; |
193 | assert(v == 8); | |
a0b7f7ea | 194 | if (caa_unlikely(rduration)) |
daddf5b0 | 195 | loop_sleep(rduration); |
f597a8b9 | 196 | urcu_mutex_unlock(&per_thread_lock[tidx].lock); |
bd252a04 | 197 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 198 | if (caa_unlikely(!test_duration_read())) |
0ee8bb0a MD |
199 | break; |
200 | } | |
201 | ||
bd252a04 | 202 | tot_nr_reads[tidx] = URCU_TLS(nr_reads); |
94df6318 MD |
203 | printf_verbose("thread_end %s, tid %lu\n", |
204 | "reader", urcu_get_thread_id()); | |
0ee8bb0a MD |
205 | return ((void*)1); |
206 | ||
207 | } | |
208 | ||
209 | void *thr_writer(void *data) | |
210 | { | |
211 | unsigned long wtidx = (unsigned long)data; | |
212 | long tidx; | |
213 | ||
94df6318 MD |
214 | printf_verbose("thread_begin %s, tid %lu\n", |
215 | "writer", urcu_get_thread_id()); | |
0ee8bb0a | 216 | |
2a7ac59d MD |
217 | set_affinity(); |
218 | ||
0ee8bb0a MD |
219 | while (!test_go) |
220 | { | |
221 | } | |
5481ddb3 | 222 | cmm_smp_mb(); |
0ee8bb0a MD |
223 | |
224 | for (;;) { | |
225 | for (tidx = 0; tidx < nr_readers; tidx++) { | |
f597a8b9 | 226 | urcu_mutex_lock(&per_thread_lock[tidx].lock); |
0ee8bb0a | 227 | } |
2b4e4125 | 228 | test_array.a = 0; |
0ee8bb0a | 229 | test_array.a = 8; |
a0b7f7ea | 230 | if (caa_unlikely(wduration)) |
31b598e0 | 231 | loop_sleep(wduration); |
f120cc10 | 232 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
f597a8b9 | 233 | urcu_mutex_unlock(&per_thread_lock[tidx].lock); |
0ee8bb0a | 234 | } |
bd252a04 | 235 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 236 | if (caa_unlikely(!test_duration_write())) |
0ee8bb0a | 237 | break; |
a0b7f7ea | 238 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 239 | loop_sleep(wdelay); |
0ee8bb0a MD |
240 | } |
241 | ||
94df6318 MD |
242 | printf_verbose("thread_end %s, tid %lu\n", |
243 | "writer", urcu_get_thread_id()); | |
bd252a04 | 244 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
0ee8bb0a 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 MD |
253 | printf(" [-d delay] (writer period (us))\n"); |
254 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
255 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
256 | printf(" [-v] (verbose output)\n"); | |
257 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
0ee8bb0a MD |
258 | printf("\n"); |
259 | } | |
260 | ||
261 | int main(int argc, char **argv) | |
262 | { | |
263 | int err; | |
264 | pthread_t *tid_reader, *tid_writer; | |
265 | void *tret; | |
0ee8bb0a | 266 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 267 | int i, a; |
0ee8bb0a MD |
268 | |
269 | if (argc < 4) { | |
270 | show_usage(argc, argv); | |
271 | return -1; | |
272 | } | |
5481ddb3 | 273 | cmm_smp_mb(); |
0ee8bb0a MD |
274 | |
275 | err = sscanf(argv[1], "%u", &nr_readers); | |
276 | if (err != 1) { | |
277 | show_usage(argc, argv); | |
278 | return -1; | |
279 | } | |
280 | ||
281 | err = sscanf(argv[2], "%u", &nr_writers); | |
282 | if (err != 1) { | |
283 | show_usage(argc, argv); | |
284 | return -1; | |
285 | } | |
286 | ||
287 | err = sscanf(argv[3], "%lu", &duration); | |
288 | if (err != 1) { | |
289 | show_usage(argc, argv); | |
290 | return -1; | |
291 | } | |
292 | ||
293 | for (i = 4; i < argc; i++) { | |
294 | if (argv[i][0] != '-') | |
295 | continue; | |
296 | switch (argv[i][1]) { | |
9e97e478 MD |
297 | case 'a': |
298 | if (argc < i + 2) { | |
299 | show_usage(argc, argv); | |
300 | return -1; | |
301 | } | |
302 | a = atoi(argv[++i]); | |
2a7ac59d | 303 | cpu_affinities[next_aff++] = a; |
9e97e478 | 304 | use_affinity = 1; |
4bad7d45 | 305 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 306 | break; |
8b632bab MD |
307 | case 'c': |
308 | if (argc < i + 2) { | |
309 | show_usage(argc, argv); | |
310 | return -1; | |
311 | } | |
9e31d0f0 | 312 | rduration = atol(argv[++i]); |
8b632bab | 313 | break; |
0ee8bb0a MD |
314 | case 'd': |
315 | if (argc < i + 2) { | |
316 | show_usage(argc, argv); | |
317 | return -1; | |
318 | } | |
9e31d0f0 | 319 | wdelay = atol(argv[++i]); |
0ee8bb0a | 320 | break; |
31b598e0 MD |
321 | case 'e': |
322 | if (argc < i + 2) { | |
323 | show_usage(argc, argv); | |
324 | return -1; | |
325 | } | |
326 | wduration = atol(argv[++i]); | |
327 | break; | |
4bad7d45 MD |
328 | case 'v': |
329 | verbose_mode = 1; | |
330 | break; | |
0ee8bb0a MD |
331 | } |
332 | } | |
333 | ||
4bad7d45 | 334 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 335 | duration, nr_readers, nr_writers); |
9e31d0f0 | 336 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 337 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
338 | printf_verbose("thread %-6s, tid %lu\n", |
339 | "main", urcu_get_thread_id()); | |
0ee8bb0a | 340 | |
9aa14175 MD |
341 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
342 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
343 | tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads)); | |
344 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
345 | per_thread_lock = calloc(nr_readers, sizeof(*per_thread_lock)); | |
dee09338 | 346 | for (i = 0; i < nr_readers; i++) { |
f597a8b9 | 347 | pthread_mutex_init(&per_thread_lock[i].lock, NULL); |
dee09338 | 348 | } |
0ee8bb0a | 349 | |
2a7ac59d MD |
350 | next_aff = 0; |
351 | ||
0ee8bb0a MD |
352 | for (i = 0; i < nr_readers; i++) { |
353 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
354 | (void *)(long)i); | |
355 | if (err != 0) | |
356 | exit(1); | |
357 | } | |
358 | for (i = 0; i < nr_writers; i++) { | |
359 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
360 | (void *)(long)i); | |
361 | if (err != 0) | |
362 | exit(1); | |
363 | } | |
364 | ||
5481ddb3 | 365 | cmm_smp_mb(); |
0ee8bb0a | 366 | |
78efb485 MD |
367 | test_go = 1; |
368 | ||
369 | sleep(duration); | |
370 | ||
371 | test_stop = 1; | |
372 | ||
0ee8bb0a MD |
373 | for (i = 0; i < nr_readers; i++) { |
374 | err = pthread_join(tid_reader[i], &tret); | |
375 | if (err != 0) | |
376 | exit(1); | |
377 | tot_reads += tot_nr_reads[i]; | |
378 | } | |
379 | for (i = 0; i < nr_writers; i++) { | |
380 | err = pthread_join(tid_writer[i], &tret); | |
381 | if (err != 0) | |
382 | exit(1); | |
383 | tot_writes += tot_nr_writes[i]; | |
384 | } | |
4bad7d45 MD |
385 | |
386 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 387 | tot_writes); |
a50a7b43 | 388 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 389 | "nr_writers %3u " |
9e31d0f0 | 390 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 391 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
392 | nr_writers, wdelay, tot_reads, tot_writes, |
393 | tot_reads + tot_writes); | |
394 | ||
0ee8bb0a MD |
395 | free(tid_reader); |
396 | free(tid_writer); | |
0ee8bb0a MD |
397 | free(tot_nr_reads); |
398 | free(tot_nr_writes); | |
399 | free(per_thread_lock); | |
400 | return 0; | |
401 | } |