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 |
d8540fc5 | 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> | |
9e97e478 | 34 | #include <sched.h> |
94b343fd | 35 | #include <errno.h> |
0ee8bb0a | 36 | |
ec4e58a3 | 37 | #include <urcu/arch.h> |
bd252a04 | 38 | #include <urcu/tls-compat.h> |
0ee8bb0a | 39 | |
65fcc7e9 MD |
40 | #ifdef __linux__ |
41 | #include <syscall.h> | |
42 | #endif | |
43 | ||
2a7ac59d MD |
44 | /* hardcoded number of CPUs */ |
45 | #define NR_CPUS 16384 | |
46 | ||
0ee8bb0a MD |
47 | #if defined(_syscall0) |
48 | _syscall0(pid_t, gettid) | |
49 | #elif defined(__NR_gettid) | |
50 | static inline pid_t gettid(void) | |
51 | { | |
52 | return syscall(__NR_gettid); | |
53 | } | |
54 | #else | |
55 | #warning "use pid as tid" | |
56 | static inline pid_t gettid(void) | |
57 | { | |
58 | return getpid(); | |
59 | } | |
60 | #endif | |
61 | ||
62 | #ifndef DYNAMIC_LINK_TEST | |
63 | #define _LGPL_SOURCE | |
64 | #else | |
65 | #define debug_yield_read() | |
66 | #endif | |
ec4e58a3 | 67 | #include <urcu.h> |
0ee8bb0a MD |
68 | |
69 | struct test_array { | |
70 | int a; | |
71 | }; | |
72 | ||
73 | struct per_thread_lock { | |
74 | pthread_mutex_t lock; | |
06f22bdb | 75 | } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */ |
0ee8bb0a MD |
76 | |
77 | static struct per_thread_lock *per_thread_lock; | |
78 | ||
78efb485 | 79 | static volatile int test_go, test_stop; |
0ee8bb0a | 80 | |
9e31d0f0 | 81 | static unsigned long wdelay; |
0ee8bb0a | 82 | |
2b4e4125 | 83 | static volatile struct test_array test_array = { 8 }; |
0ee8bb0a MD |
84 | |
85 | static unsigned long duration; | |
0ee8bb0a | 86 | |
daddf5b0 | 87 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
88 | static unsigned long rduration; |
89 | ||
31b598e0 MD |
90 | /* write-side C.S. duration, in loops */ |
91 | static unsigned long wduration; | |
92 | ||
daddf5b0 MD |
93 | static inline void loop_sleep(unsigned long l) |
94 | { | |
95 | while(l-- != 0) | |
06f22bdb | 96 | caa_cpu_relax(); |
daddf5b0 MD |
97 | } |
98 | ||
4bad7d45 MD |
99 | static int verbose_mode; |
100 | ||
101 | #define printf_verbose(fmt, args...) \ | |
102 | do { \ | |
103 | if (verbose_mode) \ | |
104 | printf(fmt, args); \ | |
105 | } while (0) | |
106 | ||
2a7ac59d MD |
107 | static unsigned int cpu_affinities[NR_CPUS]; |
108 | static unsigned int next_aff = 0; | |
109 | static int use_affinity = 0; | |
110 | ||
6af882ba MD |
111 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
112 | ||
d8540fc5 PA |
113 | #ifndef HAVE_CPU_SET_T |
114 | typedef unsigned long cpu_set_t; | |
115 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
116 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
117 | #endif | |
118 | ||
2a7ac59d MD |
119 | static void set_affinity(void) |
120 | { | |
121 | cpu_set_t mask; | |
122 | int cpu; | |
6af882ba | 123 | int ret; |
2a7ac59d MD |
124 | |
125 | if (!use_affinity) | |
126 | return; | |
127 | ||
d8540fc5 | 128 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
129 | ret = pthread_mutex_lock(&affinity_mutex); |
130 | if (ret) { | |
131 | perror("Error in pthread mutex lock"); | |
132 | exit(-1); | |
133 | } | |
2a7ac59d | 134 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
135 | ret = pthread_mutex_unlock(&affinity_mutex); |
136 | if (ret) { | |
137 | perror("Error in pthread mutex unlock"); | |
138 | exit(-1); | |
139 | } | |
2a7ac59d MD |
140 | CPU_ZERO(&mask); |
141 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
142 | #if SCHED_SETAFFINITY_ARGS == 2 |
143 | sched_setaffinity(0, &mask); | |
144 | #else | |
2a7ac59d | 145 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
146 | #endif |
147 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
148 | } |
149 | ||
0ee8bb0a MD |
150 | /* |
151 | * returns 0 if test should end. | |
152 | */ | |
153 | static int test_duration_write(void) | |
154 | { | |
78efb485 | 155 | return !test_stop; |
0ee8bb0a MD |
156 | } |
157 | ||
158 | static int test_duration_read(void) | |
159 | { | |
78efb485 | 160 | return !test_stop; |
0ee8bb0a MD |
161 | } |
162 | ||
bd252a04 MD |
163 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
164 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
0ee8bb0a | 165 | |
55271c13 | 166 | static |
06f22bdb | 167 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 168 | static |
06f22bdb | 169 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
170 | |
171 | static unsigned int nr_readers; | |
172 | static unsigned int nr_writers; | |
173 | ||
174 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
175 | ||
176 | void rcu_copy_mutex_lock(void) | |
177 | { | |
178 | int ret; | |
179 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
180 | if (ret) { | |
181 | perror("Error in pthread mutex lock"); | |
182 | exit(-1); | |
183 | } | |
184 | } | |
185 | ||
186 | void rcu_copy_mutex_unlock(void) | |
187 | { | |
188 | int ret; | |
189 | ||
190 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
191 | if (ret) { | |
192 | perror("Error in pthread mutex unlock"); | |
193 | exit(-1); | |
194 | } | |
195 | } | |
196 | ||
197 | void *thr_reader(void *data) | |
198 | { | |
199 | unsigned long tidx = (unsigned long)data; | |
200 | ||
4bad7d45 | 201 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
202 | "reader", (unsigned long) pthread_self(), |
203 | (unsigned long) gettid()); | |
0ee8bb0a | 204 | |
2a7ac59d MD |
205 | set_affinity(); |
206 | ||
0ee8bb0a MD |
207 | while (!test_go) |
208 | { | |
209 | } | |
210 | ||
211 | for (;;) { | |
212 | pthread_mutex_lock(&per_thread_lock[tidx].lock); | |
213 | assert(test_array.a == 8); | |
a0b7f7ea | 214 | if (caa_unlikely(rduration)) |
daddf5b0 | 215 | loop_sleep(rduration); |
0ee8bb0a | 216 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
bd252a04 | 217 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 218 | if (caa_unlikely(!test_duration_read())) |
0ee8bb0a MD |
219 | break; |
220 | } | |
221 | ||
bd252a04 | 222 | tot_nr_reads[tidx] = URCU_TLS(nr_reads); |
cda3c71d | 223 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
224 | "reader", (unsigned long) pthread_self(), |
225 | (unsigned long) gettid()); | |
0ee8bb0a MD |
226 | return ((void*)1); |
227 | ||
228 | } | |
229 | ||
230 | void *thr_writer(void *data) | |
231 | { | |
232 | unsigned long wtidx = (unsigned long)data; | |
233 | long tidx; | |
234 | ||
4bad7d45 | 235 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
236 | "writer", (unsigned long) pthread_self(), |
237 | (unsigned long) gettid()); | |
0ee8bb0a | 238 | |
2a7ac59d MD |
239 | set_affinity(); |
240 | ||
0ee8bb0a MD |
241 | while (!test_go) |
242 | { | |
243 | } | |
5481ddb3 | 244 | cmm_smp_mb(); |
0ee8bb0a MD |
245 | |
246 | for (;;) { | |
247 | for (tidx = 0; tidx < nr_readers; tidx++) { | |
248 | pthread_mutex_lock(&per_thread_lock[tidx].lock); | |
249 | } | |
2b4e4125 | 250 | test_array.a = 0; |
0ee8bb0a | 251 | test_array.a = 8; |
a0b7f7ea | 252 | if (caa_unlikely(wduration)) |
31b598e0 | 253 | loop_sleep(wduration); |
f120cc10 | 254 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
0ee8bb0a MD |
255 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
256 | } | |
bd252a04 | 257 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 258 | if (caa_unlikely(!test_duration_write())) |
0ee8bb0a | 259 | break; |
a0b7f7ea | 260 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 261 | loop_sleep(wdelay); |
0ee8bb0a MD |
262 | } |
263 | ||
4bad7d45 | 264 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
265 | "writer", (unsigned long) pthread_self(), |
266 | (unsigned long) gettid()); | |
bd252a04 | 267 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
0ee8bb0a MD |
268 | return ((void*)2); |
269 | } | |
270 | ||
271 | void show_usage(int argc, char **argv) | |
272 | { | |
273 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
274 | #ifdef DEBUG_YIELD | |
275 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
276 | #endif | |
277 | printf(" [-d delay] (writer period (us))"); | |
daddf5b0 | 278 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 279 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 280 | printf(" [-v] (verbose output)"); |
9e97e478 | 281 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
0ee8bb0a MD |
282 | printf("\n"); |
283 | } | |
284 | ||
285 | int main(int argc, char **argv) | |
286 | { | |
287 | int err; | |
288 | pthread_t *tid_reader, *tid_writer; | |
289 | void *tret; | |
0ee8bb0a | 290 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 291 | int i, a; |
0ee8bb0a MD |
292 | |
293 | if (argc < 4) { | |
294 | show_usage(argc, argv); | |
295 | return -1; | |
296 | } | |
5481ddb3 | 297 | cmm_smp_mb(); |
0ee8bb0a MD |
298 | |
299 | err = sscanf(argv[1], "%u", &nr_readers); | |
300 | if (err != 1) { | |
301 | show_usage(argc, argv); | |
302 | return -1; | |
303 | } | |
304 | ||
305 | err = sscanf(argv[2], "%u", &nr_writers); | |
306 | if (err != 1) { | |
307 | show_usage(argc, argv); | |
308 | return -1; | |
309 | } | |
310 | ||
311 | err = sscanf(argv[3], "%lu", &duration); | |
312 | if (err != 1) { | |
313 | show_usage(argc, argv); | |
314 | return -1; | |
315 | } | |
316 | ||
317 | for (i = 4; i < argc; i++) { | |
318 | if (argv[i][0] != '-') | |
319 | continue; | |
320 | switch (argv[i][1]) { | |
321 | #ifdef DEBUG_YIELD | |
322 | case 'r': | |
323 | yield_active |= YIELD_READ; | |
324 | break; | |
325 | case 'w': | |
326 | yield_active |= YIELD_WRITE; | |
327 | break; | |
328 | #endif | |
9e97e478 MD |
329 | case 'a': |
330 | if (argc < i + 2) { | |
331 | show_usage(argc, argv); | |
332 | return -1; | |
333 | } | |
334 | a = atoi(argv[++i]); | |
2a7ac59d | 335 | cpu_affinities[next_aff++] = a; |
9e97e478 | 336 | use_affinity = 1; |
4bad7d45 | 337 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 338 | break; |
8b632bab MD |
339 | case 'c': |
340 | if (argc < i + 2) { | |
341 | show_usage(argc, argv); | |
342 | return -1; | |
343 | } | |
9e31d0f0 | 344 | rduration = atol(argv[++i]); |
8b632bab | 345 | break; |
0ee8bb0a MD |
346 | case 'd': |
347 | if (argc < i + 2) { | |
348 | show_usage(argc, argv); | |
349 | return -1; | |
350 | } | |
9e31d0f0 | 351 | wdelay = atol(argv[++i]); |
0ee8bb0a | 352 | break; |
31b598e0 MD |
353 | case 'e': |
354 | if (argc < i + 2) { | |
355 | show_usage(argc, argv); | |
356 | return -1; | |
357 | } | |
358 | wduration = atol(argv[++i]); | |
359 | break; | |
4bad7d45 MD |
360 | case 'v': |
361 | verbose_mode = 1; | |
362 | break; | |
0ee8bb0a MD |
363 | } |
364 | } | |
365 | ||
4bad7d45 | 366 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 367 | duration, nr_readers, nr_writers); |
9e31d0f0 | 368 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
369 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
370 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
2d72fae2 | 371 | "main", (unsigned long) pthread_self(), (unsigned long) gettid()); |
0ee8bb0a MD |
372 | |
373 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
374 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
0ee8bb0a MD |
375 | tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers); |
376 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
377 | per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers); | |
dee09338 MD |
378 | for (i = 0; i < nr_readers; i++) { |
379 | err = pthread_mutex_init(&per_thread_lock[i].lock, NULL); | |
380 | if (err != 0) | |
381 | exit(1); | |
382 | } | |
0ee8bb0a | 383 | |
2a7ac59d MD |
384 | next_aff = 0; |
385 | ||
0ee8bb0a MD |
386 | for (i = 0; i < nr_readers; i++) { |
387 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
388 | (void *)(long)i); | |
389 | if (err != 0) | |
390 | exit(1); | |
391 | } | |
392 | for (i = 0; i < nr_writers; i++) { | |
393 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
394 | (void *)(long)i); | |
395 | if (err != 0) | |
396 | exit(1); | |
397 | } | |
398 | ||
5481ddb3 | 399 | cmm_smp_mb(); |
0ee8bb0a | 400 | |
78efb485 MD |
401 | test_go = 1; |
402 | ||
403 | sleep(duration); | |
404 | ||
405 | test_stop = 1; | |
406 | ||
0ee8bb0a MD |
407 | for (i = 0; i < nr_readers; i++) { |
408 | err = pthread_join(tid_reader[i], &tret); | |
409 | if (err != 0) | |
410 | exit(1); | |
411 | tot_reads += tot_nr_reads[i]; | |
412 | } | |
413 | for (i = 0; i < nr_writers; i++) { | |
414 | err = pthread_join(tid_writer[i], &tret); | |
415 | if (err != 0) | |
416 | exit(1); | |
417 | tot_writes += tot_nr_writes[i]; | |
418 | } | |
4bad7d45 MD |
419 | |
420 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 421 | tot_writes); |
a50a7b43 | 422 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 423 | "nr_writers %3u " |
9e31d0f0 | 424 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 425 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
426 | nr_writers, wdelay, tot_reads, tot_writes, |
427 | tot_reads + tot_writes); | |
428 | ||
0ee8bb0a MD |
429 | free(tid_reader); |
430 | free(tid_writer); | |
0ee8bb0a MD |
431 | free(tot_nr_reads); |
432 | free(tot_nr_writes); | |
433 | free(per_thread_lock); | |
434 | return 0; | |
435 | } |