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 | ||
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> |
0ee8bb0a | 33 | |
ec4e58a3 | 34 | #include <urcu/arch.h> |
bd252a04 | 35 | #include <urcu/tls-compat.h> |
94df6318 | 36 | #include "thread-id.h" |
65fcc7e9 | 37 | |
2a7ac59d MD |
38 | /* hardcoded number of CPUs */ |
39 | #define NR_CPUS 16384 | |
40 | ||
0ee8bb0a MD |
41 | #ifndef DYNAMIC_LINK_TEST |
42 | #define _LGPL_SOURCE | |
0ee8bb0a | 43 | #endif |
ec4e58a3 | 44 | #include <urcu.h> |
0ee8bb0a MD |
45 | |
46 | struct test_array { | |
47 | int a; | |
48 | }; | |
49 | ||
50 | struct per_thread_lock { | |
51 | pthread_mutex_t lock; | |
06f22bdb | 52 | } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */ |
0ee8bb0a MD |
53 | |
54 | static struct per_thread_lock *per_thread_lock; | |
55 | ||
78efb485 | 56 | static volatile int test_go, test_stop; |
0ee8bb0a | 57 | |
9e31d0f0 | 58 | static unsigned long wdelay; |
0ee8bb0a | 59 | |
2b4e4125 | 60 | static volatile struct test_array test_array = { 8 }; |
0ee8bb0a MD |
61 | |
62 | static unsigned long duration; | |
0ee8bb0a | 63 | |
daddf5b0 | 64 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
65 | static unsigned long rduration; |
66 | ||
31b598e0 MD |
67 | /* write-side C.S. duration, in loops */ |
68 | static unsigned long wduration; | |
69 | ||
ab0aacbe | 70 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 71 | { |
ab0aacbe | 72 | while (loops-- != 0) |
06f22bdb | 73 | caa_cpu_relax(); |
daddf5b0 MD |
74 | } |
75 | ||
4bad7d45 MD |
76 | static int verbose_mode; |
77 | ||
78 | #define printf_verbose(fmt, args...) \ | |
79 | do { \ | |
80 | if (verbose_mode) \ | |
81 | printf(fmt, args); \ | |
82 | } while (0) | |
83 | ||
2a7ac59d MD |
84 | static unsigned int cpu_affinities[NR_CPUS]; |
85 | static unsigned int next_aff = 0; | |
86 | static int use_affinity = 0; | |
87 | ||
6af882ba MD |
88 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
89 | ||
2a7ac59d MD |
90 | static void set_affinity(void) |
91 | { | |
95bc7fb9 | 92 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 93 | cpu_set_t mask; |
95bc7fb9 MD |
94 | int cpu, ret; |
95 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
96 | |
97 | if (!use_affinity) | |
98 | return; | |
99 | ||
d8540fc5 | 100 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
101 | ret = pthread_mutex_lock(&affinity_mutex); |
102 | if (ret) { | |
f597a8b9 | 103 | errno = ret; |
6af882ba | 104 | perror("Error in pthread mutex lock"); |
f597a8b9 | 105 | abort(); |
6af882ba | 106 | } |
2a7ac59d | 107 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
108 | ret = pthread_mutex_unlock(&affinity_mutex); |
109 | if (ret) { | |
f597a8b9 | 110 | errno = ret; |
6af882ba | 111 | perror("Error in pthread mutex unlock"); |
f597a8b9 | 112 | abort(); |
6af882ba | 113 | } |
2a7ac59d MD |
114 | CPU_ZERO(&mask); |
115 | CPU_SET(cpu, &mask); | |
116 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 117 | #endif /* HAVE_SCHED_SETAFFINITY */ |
2a7ac59d MD |
118 | } |
119 | ||
0ee8bb0a MD |
120 | /* |
121 | * returns 0 if test should end. | |
122 | */ | |
123 | static int test_duration_write(void) | |
124 | { | |
78efb485 | 125 | return !test_stop; |
0ee8bb0a MD |
126 | } |
127 | ||
128 | static int test_duration_read(void) | |
129 | { | |
78efb485 | 130 | return !test_stop; |
0ee8bb0a MD |
131 | } |
132 | ||
bd252a04 MD |
133 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
134 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
0ee8bb0a | 135 | |
55271c13 | 136 | static |
06f22bdb | 137 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 138 | static |
06f22bdb | 139 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
140 | |
141 | static unsigned int nr_readers; | |
142 | static unsigned int nr_writers; | |
143 | ||
f597a8b9 | 144 | static void urcu_mutex_lock(pthread_mutex_t *lock) |
0ee8bb0a MD |
145 | { |
146 | int ret; | |
f597a8b9 MD |
147 | |
148 | ret = pthread_mutex_lock(lock); | |
0ee8bb0a | 149 | if (ret) { |
f597a8b9 | 150 | errno = ret; |
0ee8bb0a | 151 | perror("Error in pthread mutex lock"); |
f597a8b9 | 152 | abort(); |
0ee8bb0a MD |
153 | } |
154 | } | |
155 | ||
f597a8b9 | 156 | static void urcu_mutex_unlock(pthread_mutex_t *lock) |
0ee8bb0a MD |
157 | { |
158 | int ret; | |
159 | ||
f597a8b9 | 160 | ret = pthread_mutex_unlock(lock); |
0ee8bb0a | 161 | if (ret) { |
f597a8b9 | 162 | errno = ret; |
0ee8bb0a | 163 | perror("Error in pthread mutex unlock"); |
f597a8b9 | 164 | abort(); |
0ee8bb0a MD |
165 | } |
166 | } | |
167 | ||
168 | void *thr_reader(void *data) | |
169 | { | |
170 | unsigned long tidx = (unsigned long)data; | |
171 | ||
94df6318 MD |
172 | printf_verbose("thread_begin %s, tid %lu\n", |
173 | "reader", urcu_get_thread_id()); | |
0ee8bb0a | 174 | |
2a7ac59d MD |
175 | set_affinity(); |
176 | ||
0ee8bb0a MD |
177 | while (!test_go) |
178 | { | |
179 | } | |
180 | ||
181 | for (;;) { | |
19d0e7ef MD |
182 | int v; |
183 | ||
f597a8b9 | 184 | urcu_mutex_lock(&per_thread_lock[tidx].lock); |
19d0e7ef MD |
185 | v = test_array.a; |
186 | assert(v == 8); | |
a0b7f7ea | 187 | if (caa_unlikely(rduration)) |
daddf5b0 | 188 | loop_sleep(rduration); |
f597a8b9 | 189 | urcu_mutex_unlock(&per_thread_lock[tidx].lock); |
bd252a04 | 190 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 191 | if (caa_unlikely(!test_duration_read())) |
0ee8bb0a MD |
192 | break; |
193 | } | |
194 | ||
bd252a04 | 195 | tot_nr_reads[tidx] = URCU_TLS(nr_reads); |
94df6318 MD |
196 | printf_verbose("thread_end %s, tid %lu\n", |
197 | "reader", urcu_get_thread_id()); | |
0ee8bb0a MD |
198 | return ((void*)1); |
199 | ||
200 | } | |
201 | ||
202 | void *thr_writer(void *data) | |
203 | { | |
204 | unsigned long wtidx = (unsigned long)data; | |
205 | long tidx; | |
206 | ||
94df6318 MD |
207 | printf_verbose("thread_begin %s, tid %lu\n", |
208 | "writer", urcu_get_thread_id()); | |
0ee8bb0a | 209 | |
2a7ac59d MD |
210 | set_affinity(); |
211 | ||
0ee8bb0a MD |
212 | while (!test_go) |
213 | { | |
214 | } | |
5481ddb3 | 215 | cmm_smp_mb(); |
0ee8bb0a MD |
216 | |
217 | for (;;) { | |
d266df35 | 218 | for (tidx = 0; tidx < (long)nr_readers; tidx++) { |
f597a8b9 | 219 | urcu_mutex_lock(&per_thread_lock[tidx].lock); |
0ee8bb0a | 220 | } |
2b4e4125 | 221 | test_array.a = 0; |
0ee8bb0a | 222 | test_array.a = 8; |
a0b7f7ea | 223 | if (caa_unlikely(wduration)) |
31b598e0 | 224 | loop_sleep(wduration); |
f120cc10 | 225 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
f597a8b9 | 226 | urcu_mutex_unlock(&per_thread_lock[tidx].lock); |
0ee8bb0a | 227 | } |
bd252a04 | 228 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 229 | if (caa_unlikely(!test_duration_write())) |
0ee8bb0a | 230 | break; |
a0b7f7ea | 231 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 232 | loop_sleep(wdelay); |
0ee8bb0a MD |
233 | } |
234 | ||
94df6318 MD |
235 | printf_verbose("thread_end %s, tid %lu\n", |
236 | "writer", urcu_get_thread_id()); | |
bd252a04 | 237 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
0ee8bb0a MD |
238 | return ((void*)2); |
239 | } | |
240 | ||
241 | void show_usage(int argc, char **argv) | |
242 | { | |
06637138 MD |
243 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
244 | argv[0]); | |
245 | printf("OPTIONS:\n"); | |
06637138 MD |
246 | printf(" [-d delay] (writer period (us))\n"); |
247 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
248 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
249 | printf(" [-v] (verbose output)\n"); | |
250 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
0ee8bb0a MD |
251 | printf("\n"); |
252 | } | |
253 | ||
254 | int main(int argc, char **argv) | |
255 | { | |
256 | int err; | |
257 | pthread_t *tid_reader, *tid_writer; | |
258 | void *tret; | |
0ee8bb0a | 259 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 260 | int i, a; |
83e334d0 | 261 | unsigned int i_thr; |
0ee8bb0a MD |
262 | |
263 | if (argc < 4) { | |
264 | show_usage(argc, argv); | |
265 | return -1; | |
266 | } | |
5481ddb3 | 267 | cmm_smp_mb(); |
0ee8bb0a MD |
268 | |
269 | err = sscanf(argv[1], "%u", &nr_readers); | |
270 | if (err != 1) { | |
271 | show_usage(argc, argv); | |
272 | return -1; | |
273 | } | |
274 | ||
275 | err = sscanf(argv[2], "%u", &nr_writers); | |
276 | if (err != 1) { | |
277 | show_usage(argc, argv); | |
278 | return -1; | |
279 | } | |
83e334d0 | 280 | |
0ee8bb0a MD |
281 | err = sscanf(argv[3], "%lu", &duration); |
282 | if (err != 1) { | |
283 | show_usage(argc, argv); | |
284 | return -1; | |
285 | } | |
286 | ||
287 | for (i = 4; i < argc; i++) { | |
288 | if (argv[i][0] != '-') | |
289 | continue; | |
290 | switch (argv[i][1]) { | |
9e97e478 MD |
291 | case 'a': |
292 | if (argc < i + 2) { | |
293 | show_usage(argc, argv); | |
294 | return -1; | |
295 | } | |
296 | a = atoi(argv[++i]); | |
2a7ac59d | 297 | cpu_affinities[next_aff++] = a; |
9e97e478 | 298 | use_affinity = 1; |
4bad7d45 | 299 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 300 | break; |
8b632bab MD |
301 | case 'c': |
302 | if (argc < i + 2) { | |
303 | show_usage(argc, argv); | |
304 | return -1; | |
305 | } | |
9e31d0f0 | 306 | rduration = atol(argv[++i]); |
8b632bab | 307 | break; |
0ee8bb0a MD |
308 | case 'd': |
309 | if (argc < i + 2) { | |
310 | show_usage(argc, argv); | |
311 | return -1; | |
312 | } | |
9e31d0f0 | 313 | wdelay = atol(argv[++i]); |
0ee8bb0a | 314 | break; |
31b598e0 MD |
315 | case 'e': |
316 | if (argc < i + 2) { | |
317 | show_usage(argc, argv); | |
318 | return -1; | |
319 | } | |
320 | wduration = atol(argv[++i]); | |
321 | break; | |
4bad7d45 MD |
322 | case 'v': |
323 | verbose_mode = 1; | |
324 | break; | |
0ee8bb0a MD |
325 | } |
326 | } | |
327 | ||
4bad7d45 | 328 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 329 | duration, nr_readers, nr_writers); |
9e31d0f0 | 330 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 331 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
332 | printf_verbose("thread %-6s, tid %lu\n", |
333 | "main", urcu_get_thread_id()); | |
0ee8bb0a | 334 | |
9aa14175 MD |
335 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
336 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
337 | tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads)); | |
338 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
339 | per_thread_lock = calloc(nr_readers, sizeof(*per_thread_lock)); | |
83e334d0 MJ |
340 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
341 | pthread_mutex_init(&per_thread_lock[i_thr].lock, NULL); | |
dee09338 | 342 | } |
0ee8bb0a | 343 | |
2a7ac59d MD |
344 | next_aff = 0; |
345 | ||
83e334d0 MJ |
346 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
347 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
348 | (void *)(long)i_thr); | |
0ee8bb0a MD |
349 | if (err != 0) |
350 | exit(1); | |
351 | } | |
83e334d0 MJ |
352 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
353 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
354 | (void *)(long)i_thr); | |
0ee8bb0a MD |
355 | if (err != 0) |
356 | exit(1); | |
357 | } | |
358 | ||
5481ddb3 | 359 | cmm_smp_mb(); |
0ee8bb0a | 360 | |
78efb485 MD |
361 | test_go = 1; |
362 | ||
363 | sleep(duration); | |
364 | ||
365 | test_stop = 1; | |
366 | ||
83e334d0 MJ |
367 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
368 | err = pthread_join(tid_reader[i_thr], &tret); | |
0ee8bb0a MD |
369 | if (err != 0) |
370 | exit(1); | |
83e334d0 | 371 | tot_reads += tot_nr_reads[i_thr]; |
0ee8bb0a | 372 | } |
83e334d0 MJ |
373 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
374 | err = pthread_join(tid_writer[i_thr], &tret); | |
0ee8bb0a MD |
375 | if (err != 0) |
376 | exit(1); | |
83e334d0 | 377 | tot_writes += tot_nr_writes[i_thr]; |
0ee8bb0a | 378 | } |
4bad7d45 MD |
379 | |
380 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 381 | tot_writes); |
a50a7b43 | 382 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 383 | "nr_writers %3u " |
9e31d0f0 | 384 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 385 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
386 | nr_writers, wdelay, tot_reads, tot_writes, |
387 | tot_reads + tot_writes); | |
388 | ||
0ee8bb0a MD |
389 | free(tid_reader); |
390 | free(tid_writer); | |
0ee8bb0a MD |
391 | free(tot_nr_reads); |
392 | free(tot_nr_writes); | |
393 | free(per_thread_lock); | |
394 | return 0; | |
395 | } |