Commit | Line | Data |
---|---|---|
de10a585 MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
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 | #define _GNU_SOURCE | |
24 | #include "../config.h" | |
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> | |
de10a585 MD |
34 | #include <errno.h> |
35 | ||
36 | #include <urcu/arch.h> | |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
2953b501 | 38 | #include "cpuset.h" |
de10a585 MD |
39 | |
40 | #ifdef __linux__ | |
41 | #include <syscall.h> | |
42 | #endif | |
43 | ||
44 | /* hardcoded number of CPUs */ | |
45 | #define NR_CPUS 16384 | |
46 | ||
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 | |
1de4df4b | 65 | #define rcu_debug_yield_read() |
de10a585 MD |
66 | #endif |
67 | #include "urcu-qsbr.h" | |
68 | ||
de10a585 MD |
69 | static volatile int test_go, test_stop; |
70 | ||
71 | static unsigned long wdelay; | |
72 | ||
bcc74df3 | 73 | static int *test_rcu_pointer; |
de10a585 MD |
74 | |
75 | static unsigned long duration; | |
76 | ||
77 | /* read-side C.S. duration, in loops */ | |
78 | static unsigned long rduration; | |
79 | ||
80 | /* write-side C.S. duration, in loops */ | |
81 | static unsigned long wduration; | |
82 | ||
ab0aacbe | 83 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 84 | { |
ab0aacbe | 85 | while (loops-- != 0) |
de10a585 MD |
86 | caa_cpu_relax(); |
87 | } | |
88 | ||
89 | static int verbose_mode; | |
90 | ||
91 | #define printf_verbose(fmt, args...) \ | |
92 | do { \ | |
93 | if (verbose_mode) \ | |
94 | printf(fmt, args); \ | |
95 | } while (0) | |
96 | ||
97 | static unsigned int cpu_affinities[NR_CPUS]; | |
98 | static unsigned int next_aff = 0; | |
99 | static int use_affinity = 0; | |
100 | ||
101 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
102 | ||
de10a585 MD |
103 | static void set_affinity(void) |
104 | { | |
95bc7fb9 | 105 | #if HAVE_SCHED_SETAFFINITY |
de10a585 | 106 | cpu_set_t mask; |
95bc7fb9 MD |
107 | int cpu, ret; |
108 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
109 | |
110 | if (!use_affinity) | |
111 | return; | |
112 | ||
113 | #if HAVE_SCHED_SETAFFINITY | |
114 | ret = pthread_mutex_lock(&affinity_mutex); | |
115 | if (ret) { | |
116 | perror("Error in pthread mutex lock"); | |
117 | exit(-1); | |
118 | } | |
119 | cpu = cpu_affinities[next_aff++]; | |
120 | ret = pthread_mutex_unlock(&affinity_mutex); | |
121 | if (ret) { | |
122 | perror("Error in pthread mutex unlock"); | |
123 | exit(-1); | |
124 | } | |
125 | CPU_ZERO(&mask); | |
126 | CPU_SET(cpu, &mask); | |
127 | #if SCHED_SETAFFINITY_ARGS == 2 | |
128 | sched_setaffinity(0, &mask); | |
129 | #else | |
130 | sched_setaffinity(0, sizeof(mask), &mask); | |
131 | #endif | |
132 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
133 | } | |
134 | ||
135 | /* | |
136 | * returns 0 if test should end. | |
137 | */ | |
138 | static int test_duration_write(void) | |
139 | { | |
140 | return !test_stop; | |
141 | } | |
142 | ||
143 | static int test_duration_read(void) | |
144 | { | |
145 | return !test_stop; | |
146 | } | |
147 | ||
bd252a04 MD |
148 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
149 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
150 | |
151 | static unsigned int nr_readers; | |
152 | static unsigned int nr_writers; | |
153 | ||
154 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
155 | ||
156 | void rcu_copy_mutex_lock(void) | |
157 | { | |
158 | int ret; | |
159 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
160 | if (ret) { | |
161 | perror("Error in pthread mutex lock"); | |
162 | exit(-1); | |
163 | } | |
164 | } | |
165 | ||
166 | void rcu_copy_mutex_unlock(void) | |
167 | { | |
168 | int ret; | |
169 | ||
170 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
171 | if (ret) { | |
172 | perror("Error in pthread mutex unlock"); | |
173 | exit(-1); | |
174 | } | |
175 | } | |
176 | ||
de10a585 MD |
177 | void *thr_reader(void *_count) |
178 | { | |
179 | unsigned long long *count = _count; | |
bcc74df3 | 180 | int *local_ptr; |
de10a585 MD |
181 | |
182 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
183 | "reader", (unsigned long) pthread_self(), |
184 | (unsigned long) gettid()); | |
de10a585 MD |
185 | |
186 | set_affinity(); | |
187 | ||
188 | rcu_register_thread(); | |
189 | ||
190 | while (!test_go) | |
191 | { | |
192 | } | |
193 | cmm_smp_mb(); | |
194 | ||
195 | for (;;) { | |
196 | rcu_read_lock(); | |
197 | local_ptr = rcu_dereference(test_rcu_pointer); | |
1de4df4b | 198 | rcu_debug_yield_read(); |
de10a585 | 199 | if (local_ptr) |
bcc74df3 | 200 | assert(*local_ptr == 8); |
a0b7f7ea | 201 | if (caa_unlikely(rduration)) |
de10a585 MD |
202 | loop_sleep(rduration); |
203 | rcu_read_unlock(); | |
bd252a04 | 204 | URCU_TLS(nr_reads)++; |
de10a585 | 205 | /* QS each 1024 reads */ |
bd252a04 | 206 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 207 | rcu_quiescent_state(); |
a0b7f7ea | 208 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
209 | break; |
210 | } | |
211 | ||
212 | rcu_unregister_thread(); | |
213 | ||
214 | /* test extra thread registration */ | |
215 | rcu_register_thread(); | |
216 | rcu_unregister_thread(); | |
217 | ||
bd252a04 | 218 | *count = URCU_TLS(nr_reads); |
de10a585 | 219 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
220 | "reader", (unsigned long) pthread_self(), |
221 | (unsigned long) gettid()); | |
de10a585 MD |
222 | return ((void*)1); |
223 | ||
224 | } | |
225 | ||
226 | void *thr_writer(void *_count) | |
227 | { | |
228 | unsigned long long *count = _count; | |
bcc74df3 | 229 | int *new, *old; |
de10a585 MD |
230 | |
231 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
232 | "writer", (unsigned long) pthread_self(), |
233 | (unsigned long) gettid()); | |
de10a585 MD |
234 | |
235 | set_affinity(); | |
236 | ||
237 | while (!test_go) | |
238 | { | |
239 | } | |
240 | cmm_smp_mb(); | |
241 | ||
242 | for (;;) { | |
bcc74df3 MD |
243 | new = malloc(sizeof(int)); |
244 | assert(new); | |
245 | *new = 8; | |
de10a585 | 246 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 247 | if (caa_unlikely(wduration)) |
de10a585 MD |
248 | loop_sleep(wduration); |
249 | synchronize_rcu(); | |
de10a585 | 250 | if (old) |
bcc74df3 MD |
251 | *old = 0; |
252 | free(old); | |
bd252a04 | 253 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 254 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 255 | break; |
a0b7f7ea | 256 | if (caa_unlikely(wdelay)) |
de10a585 MD |
257 | loop_sleep(wdelay); |
258 | } | |
259 | ||
260 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
261 | "writer", (unsigned long) pthread_self(), |
262 | (unsigned long) gettid()); | |
bd252a04 | 263 | *count = URCU_TLS(nr_writes); |
de10a585 MD |
264 | return ((void*)2); |
265 | } | |
266 | ||
267 | void show_usage(int argc, char **argv) | |
268 | { | |
269 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
270 | #ifdef DEBUG_YIELD | |
271 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
272 | #endif | |
273 | printf(" [-d delay] (writer period (us))"); | |
274 | printf(" [-c duration] (reader C.S. duration (in loops))"); | |
275 | printf(" [-e duration] (writer C.S. duration (in loops))"); | |
276 | printf(" [-v] (verbose output)"); | |
277 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); | |
278 | printf("\n"); | |
279 | } | |
280 | ||
281 | int main(int argc, char **argv) | |
282 | { | |
283 | int err; | |
284 | pthread_t *tid_reader, *tid_writer; | |
285 | void *tret; | |
286 | unsigned long long *count_reader, *count_writer; | |
287 | unsigned long long tot_reads = 0, tot_writes = 0; | |
288 | int i, a; | |
289 | ||
290 | if (argc < 4) { | |
291 | show_usage(argc, argv); | |
292 | return -1; | |
293 | } | |
294 | ||
295 | err = sscanf(argv[1], "%u", &nr_readers); | |
296 | if (err != 1) { | |
297 | show_usage(argc, argv); | |
298 | return -1; | |
299 | } | |
300 | ||
301 | err = sscanf(argv[2], "%u", &nr_writers); | |
302 | if (err != 1) { | |
303 | show_usage(argc, argv); | |
304 | return -1; | |
305 | } | |
306 | ||
307 | err = sscanf(argv[3], "%lu", &duration); | |
308 | if (err != 1) { | |
309 | show_usage(argc, argv); | |
310 | return -1; | |
311 | } | |
312 | ||
313 | for (i = 4; i < argc; i++) { | |
314 | if (argv[i][0] != '-') | |
315 | continue; | |
316 | switch (argv[i][1]) { | |
317 | #ifdef DEBUG_YIELD | |
318 | case 'r': | |
1de4df4b | 319 | rcu_yield_active |= RCU_RCU_YIELD_READ; |
de10a585 MD |
320 | break; |
321 | case 'w': | |
1de4df4b | 322 | rcu_yield_active |= RCU_RCU_YIELD_WRITE; |
de10a585 MD |
323 | break; |
324 | #endif | |
325 | case 'a': | |
326 | if (argc < i + 2) { | |
327 | show_usage(argc, argv); | |
328 | return -1; | |
329 | } | |
330 | a = atoi(argv[++i]); | |
331 | cpu_affinities[next_aff++] = a; | |
332 | use_affinity = 1; | |
333 | printf_verbose("Adding CPU %d affinity\n", a); | |
334 | break; | |
335 | case 'c': | |
336 | if (argc < i + 2) { | |
337 | show_usage(argc, argv); | |
338 | return -1; | |
339 | } | |
340 | rduration = atol(argv[++i]); | |
341 | break; | |
342 | case 'd': | |
343 | if (argc < i + 2) { | |
344 | show_usage(argc, argv); | |
345 | return -1; | |
346 | } | |
347 | wdelay = atol(argv[++i]); | |
348 | break; | |
349 | case 'e': | |
350 | if (argc < i + 2) { | |
351 | show_usage(argc, argv); | |
352 | return -1; | |
353 | } | |
354 | wduration = atol(argv[++i]); | |
355 | break; | |
356 | case 'v': | |
357 | verbose_mode = 1; | |
358 | break; | |
359 | } | |
360 | } | |
361 | ||
362 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
363 | duration, nr_readers, nr_writers); | |
364 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
365 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
366 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
367 | "main", (unsigned long) pthread_self(), |
368 | (unsigned long) gettid()); | |
de10a585 | 369 | |
de10a585 MD |
370 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
371 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
372 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
373 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
374 | ||
375 | next_aff = 0; | |
376 | ||
377 | for (i = 0; i < nr_readers; i++) { | |
378 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
379 | &count_reader[i]); | |
380 | if (err != 0) | |
381 | exit(1); | |
382 | } | |
383 | for (i = 0; i < nr_writers; i++) { | |
384 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
385 | &count_writer[i]); | |
386 | if (err != 0) | |
387 | exit(1); | |
388 | } | |
389 | ||
390 | cmm_smp_mb(); | |
391 | ||
392 | test_go = 1; | |
393 | ||
394 | sleep(duration); | |
395 | ||
396 | test_stop = 1; | |
397 | ||
398 | for (i = 0; i < nr_readers; i++) { | |
399 | err = pthread_join(tid_reader[i], &tret); | |
400 | if (err != 0) | |
401 | exit(1); | |
402 | tot_reads += count_reader[i]; | |
403 | } | |
404 | for (i = 0; i < nr_writers; i++) { | |
405 | err = pthread_join(tid_writer[i], &tret); | |
406 | if (err != 0) | |
407 | exit(1); | |
408 | tot_writes += count_writer[i]; | |
409 | } | |
410 | ||
411 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
412 | tot_writes); | |
413 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
414 | "nr_writers %3u " | |
415 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
416 | argv[0], duration, nr_readers, rduration, wduration, | |
417 | nr_writers, wdelay, tot_reads, tot_writes, | |
418 | tot_reads + tot_writes); | |
bcc74df3 | 419 | free(test_rcu_pointer); |
de10a585 MD |
420 | free(tid_reader); |
421 | free(tid_writer); | |
422 | free(count_reader); | |
423 | free(count_writer); | |
424 | return 0; | |
425 | } |