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 | ||
ab0aacbe | 93 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 94 | { |
ab0aacbe | 95 | while (loops-- != 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 | { | |
95bc7fb9 | 121 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 122 | cpu_set_t mask; |
95bc7fb9 MD |
123 | int cpu, ret; |
124 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
125 | |
126 | if (!use_affinity) | |
127 | return; | |
128 | ||
d8540fc5 | 129 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
130 | ret = pthread_mutex_lock(&affinity_mutex); |
131 | if (ret) { | |
132 | perror("Error in pthread mutex lock"); | |
133 | exit(-1); | |
134 | } | |
2a7ac59d | 135 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
136 | ret = pthread_mutex_unlock(&affinity_mutex); |
137 | if (ret) { | |
138 | perror("Error in pthread mutex unlock"); | |
139 | exit(-1); | |
140 | } | |
2a7ac59d MD |
141 | CPU_ZERO(&mask); |
142 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
143 | #if SCHED_SETAFFINITY_ARGS == 2 |
144 | sched_setaffinity(0, &mask); | |
145 | #else | |
2a7ac59d | 146 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
147 | #endif |
148 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
149 | } |
150 | ||
0ee8bb0a MD |
151 | /* |
152 | * returns 0 if test should end. | |
153 | */ | |
154 | static int test_duration_write(void) | |
155 | { | |
78efb485 | 156 | return !test_stop; |
0ee8bb0a MD |
157 | } |
158 | ||
159 | static int test_duration_read(void) | |
160 | { | |
78efb485 | 161 | return !test_stop; |
0ee8bb0a MD |
162 | } |
163 | ||
bd252a04 MD |
164 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
165 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
0ee8bb0a | 166 | |
55271c13 | 167 | static |
06f22bdb | 168 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 169 | static |
06f22bdb | 170 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
171 | |
172 | static unsigned int nr_readers; | |
173 | static unsigned int nr_writers; | |
174 | ||
175 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
176 | ||
177 | void rcu_copy_mutex_lock(void) | |
178 | { | |
179 | int ret; | |
180 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
181 | if (ret) { | |
182 | perror("Error in pthread mutex lock"); | |
183 | exit(-1); | |
184 | } | |
185 | } | |
186 | ||
187 | void rcu_copy_mutex_unlock(void) | |
188 | { | |
189 | int ret; | |
190 | ||
191 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
192 | if (ret) { | |
193 | perror("Error in pthread mutex unlock"); | |
194 | exit(-1); | |
195 | } | |
196 | } | |
197 | ||
198 | void *thr_reader(void *data) | |
199 | { | |
200 | unsigned long tidx = (unsigned long)data; | |
201 | ||
4bad7d45 | 202 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
0ee8bb0a MD |
203 | "reader", pthread_self(), (unsigned long)gettid()); |
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", |
0ee8bb0a MD |
224 | "reader", pthread_self(), (unsigned long)gettid()); |
225 | return ((void*)1); | |
226 | ||
227 | } | |
228 | ||
229 | void *thr_writer(void *data) | |
230 | { | |
231 | unsigned long wtidx = (unsigned long)data; | |
232 | long tidx; | |
233 | ||
4bad7d45 | 234 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
0ee8bb0a MD |
235 | "writer", pthread_self(), (unsigned long)gettid()); |
236 | ||
2a7ac59d MD |
237 | set_affinity(); |
238 | ||
0ee8bb0a MD |
239 | while (!test_go) |
240 | { | |
241 | } | |
5481ddb3 | 242 | cmm_smp_mb(); |
0ee8bb0a MD |
243 | |
244 | for (;;) { | |
245 | for (tidx = 0; tidx < nr_readers; tidx++) { | |
246 | pthread_mutex_lock(&per_thread_lock[tidx].lock); | |
247 | } | |
2b4e4125 | 248 | test_array.a = 0; |
0ee8bb0a | 249 | test_array.a = 8; |
a0b7f7ea | 250 | if (caa_unlikely(wduration)) |
31b598e0 | 251 | loop_sleep(wduration); |
f120cc10 | 252 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
0ee8bb0a MD |
253 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
254 | } | |
bd252a04 | 255 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 256 | if (caa_unlikely(!test_duration_write())) |
0ee8bb0a | 257 | break; |
a0b7f7ea | 258 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 259 | loop_sleep(wdelay); |
0ee8bb0a MD |
260 | } |
261 | ||
4bad7d45 | 262 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
0ee8bb0a | 263 | "writer", pthread_self(), (unsigned long)gettid()); |
bd252a04 | 264 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
0ee8bb0a MD |
265 | return ((void*)2); |
266 | } | |
267 | ||
268 | void show_usage(int argc, char **argv) | |
269 | { | |
270 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
271 | #ifdef DEBUG_YIELD | |
272 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
273 | #endif | |
274 | printf(" [-d delay] (writer period (us))"); | |
daddf5b0 | 275 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 276 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 277 | printf(" [-v] (verbose output)"); |
9e97e478 | 278 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
0ee8bb0a MD |
279 | printf("\n"); |
280 | } | |
281 | ||
282 | int main(int argc, char **argv) | |
283 | { | |
284 | int err; | |
285 | pthread_t *tid_reader, *tid_writer; | |
286 | void *tret; | |
0ee8bb0a | 287 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 288 | int i, a; |
0ee8bb0a MD |
289 | |
290 | if (argc < 4) { | |
291 | show_usage(argc, argv); | |
292 | return -1; | |
293 | } | |
5481ddb3 | 294 | cmm_smp_mb(); |
0ee8bb0a MD |
295 | |
296 | err = sscanf(argv[1], "%u", &nr_readers); | |
297 | if (err != 1) { | |
298 | show_usage(argc, argv); | |
299 | return -1; | |
300 | } | |
301 | ||
302 | err = sscanf(argv[2], "%u", &nr_writers); | |
303 | if (err != 1) { | |
304 | show_usage(argc, argv); | |
305 | return -1; | |
306 | } | |
307 | ||
308 | err = sscanf(argv[3], "%lu", &duration); | |
309 | if (err != 1) { | |
310 | show_usage(argc, argv); | |
311 | return -1; | |
312 | } | |
313 | ||
314 | for (i = 4; i < argc; i++) { | |
315 | if (argv[i][0] != '-') | |
316 | continue; | |
317 | switch (argv[i][1]) { | |
318 | #ifdef DEBUG_YIELD | |
319 | case 'r': | |
320 | yield_active |= YIELD_READ; | |
321 | break; | |
322 | case 'w': | |
323 | yield_active |= YIELD_WRITE; | |
324 | break; | |
325 | #endif | |
9e97e478 MD |
326 | case 'a': |
327 | if (argc < i + 2) { | |
328 | show_usage(argc, argv); | |
329 | return -1; | |
330 | } | |
331 | a = atoi(argv[++i]); | |
2a7ac59d | 332 | cpu_affinities[next_aff++] = a; |
9e97e478 | 333 | use_affinity = 1; |
4bad7d45 | 334 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 335 | break; |
8b632bab MD |
336 | case 'c': |
337 | if (argc < i + 2) { | |
338 | show_usage(argc, argv); | |
339 | return -1; | |
340 | } | |
9e31d0f0 | 341 | rduration = atol(argv[++i]); |
8b632bab | 342 | break; |
0ee8bb0a MD |
343 | case 'd': |
344 | if (argc < i + 2) { | |
345 | show_usage(argc, argv); | |
346 | return -1; | |
347 | } | |
9e31d0f0 | 348 | wdelay = atol(argv[++i]); |
0ee8bb0a | 349 | break; |
31b598e0 MD |
350 | case 'e': |
351 | if (argc < i + 2) { | |
352 | show_usage(argc, argv); | |
353 | return -1; | |
354 | } | |
355 | wduration = atol(argv[++i]); | |
356 | break; | |
4bad7d45 MD |
357 | case 'v': |
358 | verbose_mode = 1; | |
359 | break; | |
0ee8bb0a MD |
360 | } |
361 | } | |
362 | ||
4bad7d45 | 363 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 364 | duration, nr_readers, nr_writers); |
9e31d0f0 | 365 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
366 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
367 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
0ee8bb0a MD |
368 | "main", pthread_self(), (unsigned long)gettid()); |
369 | ||
370 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
371 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
0ee8bb0a MD |
372 | tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers); |
373 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
374 | per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers); | |
dee09338 MD |
375 | for (i = 0; i < nr_readers; i++) { |
376 | err = pthread_mutex_init(&per_thread_lock[i].lock, NULL); | |
377 | if (err != 0) | |
378 | exit(1); | |
379 | } | |
0ee8bb0a | 380 | |
2a7ac59d MD |
381 | next_aff = 0; |
382 | ||
0ee8bb0a MD |
383 | for (i = 0; i < nr_readers; i++) { |
384 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
385 | (void *)(long)i); | |
386 | if (err != 0) | |
387 | exit(1); | |
388 | } | |
389 | for (i = 0; i < nr_writers; i++) { | |
390 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
391 | (void *)(long)i); | |
392 | if (err != 0) | |
393 | exit(1); | |
394 | } | |
395 | ||
5481ddb3 | 396 | cmm_smp_mb(); |
0ee8bb0a | 397 | |
78efb485 MD |
398 | test_go = 1; |
399 | ||
400 | sleep(duration); | |
401 | ||
402 | test_stop = 1; | |
403 | ||
0ee8bb0a MD |
404 | for (i = 0; i < nr_readers; i++) { |
405 | err = pthread_join(tid_reader[i], &tret); | |
406 | if (err != 0) | |
407 | exit(1); | |
408 | tot_reads += tot_nr_reads[i]; | |
409 | } | |
410 | for (i = 0; i < nr_writers; i++) { | |
411 | err = pthread_join(tid_writer[i], &tret); | |
412 | if (err != 0) | |
413 | exit(1); | |
414 | tot_writes += tot_nr_writes[i]; | |
415 | } | |
4bad7d45 MD |
416 | |
417 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 418 | tot_writes); |
a50a7b43 | 419 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 420 | "nr_writers %3u " |
9e31d0f0 | 421 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 422 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
423 | nr_writers, wdelay, tot_reads, tot_writes, |
424 | tot_reads + tot_writes); | |
425 | ||
0ee8bb0a MD |
426 | free(tid_reader); |
427 | free(tid_writer); | |
0ee8bb0a MD |
428 | free(tot_nr_reads); |
429 | free(tot_nr_writes); | |
430 | free(per_thread_lock); | |
431 | return 0; | |
432 | } |