Commit | Line | Data |
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ce29b371 MJ |
1 | // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2 | // | |
3 | // SPDX-License-Identifier: GPL-2.0-or-later | |
4 | ||
074d8438 | 5 | /* |
074d8438 | 6 | * Userspace RCU library - test program |
074d8438 MD |
7 | */ |
8 | ||
074d8438 MD |
9 | #include <stdio.h> |
10 | #include <pthread.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/types.h> | |
14 | #include <sys/wait.h> | |
15 | #include <unistd.h> | |
16 | #include <stdio.h> | |
94b343fd | 17 | #include <errno.h> |
074d8438 MD |
18 | |
19 | #include <urcu/arch.h> | |
01477510 | 20 | #include <urcu/assert.h> |
bd252a04 | 21 | #include <urcu/tls-compat.h> |
94df6318 | 22 | #include "thread-id.h" |
2650042a | 23 | #include "../common/debug-yield.h" |
65fcc7e9 | 24 | |
074d8438 MD |
25 | /* hardcoded number of CPUs */ |
26 | #define NR_CPUS 16384 | |
27 | ||
074d8438 MD |
28 | #ifndef DYNAMIC_LINK_TEST |
29 | #define _LGPL_SOURCE | |
074d8438 MD |
30 | #endif |
31 | #include <urcu.h> | |
32 | ||
33 | struct test_array { | |
34 | int a; | |
35 | }; | |
36 | ||
37 | static volatile int test_go, test_stop; | |
38 | ||
39 | static unsigned long wdelay; | |
40 | ||
41 | static struct test_array *test_rcu_pointer; | |
42 | ||
43 | static unsigned long duration; | |
44 | ||
45 | /* read-side C.S. duration, in loops */ | |
46 | static unsigned long rduration; | |
47 | ||
31b598e0 MD |
48 | /* write-side C.S. duration, in loops */ |
49 | static unsigned long wduration; | |
50 | ||
ab0aacbe | 51 | static inline void loop_sleep(unsigned long loops) |
074d8438 | 52 | { |
ab0aacbe | 53 | while (loops-- != 0) |
06f22bdb | 54 | caa_cpu_relax(); |
074d8438 MD |
55 | } |
56 | ||
57 | static int verbose_mode; | |
58 | ||
59 | #define printf_verbose(fmt, args...) \ | |
60 | do { \ | |
61 | if (verbose_mode) \ | |
62 | printf(fmt, args); \ | |
63 | } while (0) | |
64 | ||
65 | static unsigned int cpu_affinities[NR_CPUS]; | |
66 | static unsigned int next_aff = 0; | |
67 | static int use_affinity = 0; | |
68 | ||
69 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
70 | ||
71 | static void set_affinity(void) | |
72 | { | |
2388c075 | 73 | #ifdef HAVE_SCHED_SETAFFINITY |
074d8438 | 74 | cpu_set_t mask; |
95bc7fb9 MD |
75 | int cpu, ret; |
76 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
074d8438 MD |
77 | |
78 | if (!use_affinity) | |
79 | return; | |
80 | ||
2388c075 | 81 | #ifdef HAVE_SCHED_SETAFFINITY |
074d8438 MD |
82 | ret = pthread_mutex_lock(&affinity_mutex); |
83 | if (ret) { | |
84 | perror("Error in pthread mutex lock"); | |
85 | exit(-1); | |
86 | } | |
87 | cpu = cpu_affinities[next_aff++]; | |
88 | ret = pthread_mutex_unlock(&affinity_mutex); | |
89 | if (ret) { | |
90 | perror("Error in pthread mutex unlock"); | |
91 | exit(-1); | |
92 | } | |
d8540fc5 | 93 | |
074d8438 MD |
94 | CPU_ZERO(&mask); |
95 | CPU_SET(cpu, &mask); | |
96 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 97 | #endif /* HAVE_SCHED_SETAFFINITY */ |
074d8438 MD |
98 | } |
99 | ||
100 | /* | |
101 | * returns 0 if test should end. | |
102 | */ | |
103 | static int test_duration_write(void) | |
104 | { | |
105 | return !test_stop; | |
106 | } | |
107 | ||
108 | static int test_duration_read(void) | |
109 | { | |
110 | return !test_stop; | |
111 | } | |
112 | ||
bd252a04 MD |
113 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
114 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
074d8438 MD |
115 | |
116 | static unsigned int nr_readers; | |
117 | static unsigned int nr_writers; | |
118 | ||
119 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
120 | ||
61c3fb60 | 121 | static |
074d8438 MD |
122 | void rcu_copy_mutex_lock(void) |
123 | { | |
124 | int ret; | |
125 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
126 | if (ret) { | |
127 | perror("Error in pthread mutex lock"); | |
128 | exit(-1); | |
129 | } | |
130 | } | |
131 | ||
61c3fb60 | 132 | static |
074d8438 MD |
133 | void rcu_copy_mutex_unlock(void) |
134 | { | |
135 | int ret; | |
136 | ||
137 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
138 | if (ret) { | |
139 | perror("Error in pthread mutex unlock"); | |
140 | exit(-1); | |
141 | } | |
142 | } | |
143 | ||
144 | /* | |
145 | * malloc/free are reusing memory areas too quickly, which does not let us | |
146 | * test races appropriately. Use a large circular array for allocations. | |
d4267b0b MD |
147 | * ARRAY_SIZE is larger than nr_writers, and we keep the mutex across |
148 | * both alloc and free, which insures we never run over our tail. | |
074d8438 MD |
149 | */ |
150 | #define ARRAY_SIZE (1048576 * nr_writers) | |
83e334d0 MJ |
151 | #define ARRAY_POISON (int) 0xDEADBEEF |
152 | static unsigned int array_index; | |
074d8438 MD |
153 | static struct test_array *test_array; |
154 | ||
155 | static struct test_array *test_array_alloc(void) | |
156 | { | |
157 | struct test_array *ret; | |
158 | int index; | |
159 | ||
074d8438 | 160 | index = array_index % ARRAY_SIZE; |
01477510 | 161 | urcu_posix_assert(test_array[index].a == ARRAY_POISON || |
074d8438 MD |
162 | test_array[index].a == 0); |
163 | ret = &test_array[index]; | |
164 | array_index++; | |
165 | if (array_index == ARRAY_SIZE) | |
166 | array_index = 0; | |
074d8438 MD |
167 | return ret; |
168 | } | |
169 | ||
170 | static void test_array_free(struct test_array *ptr) | |
171 | { | |
172 | if (!ptr) | |
173 | return; | |
074d8438 | 174 | ptr->a = ARRAY_POISON; |
074d8438 MD |
175 | } |
176 | ||
61c3fb60 | 177 | static |
074d8438 MD |
178 | void *thr_reader(void *_count) |
179 | { | |
180 | unsigned long long *count = _count; | |
181 | struct test_array *local_ptr; | |
182 | ||
94df6318 MD |
183 | printf_verbose("thread_begin %s, tid %lu\n", |
184 | "reader", urcu_get_thread_id()); | |
074d8438 MD |
185 | |
186 | set_affinity(); | |
187 | ||
188 | rcu_register_thread(); | |
189 | ||
190 | while (!test_go) | |
191 | { | |
192 | } | |
5481ddb3 | 193 | cmm_smp_mb(); |
074d8438 MD |
194 | |
195 | for (;;) { | |
196 | rcu_read_lock(); | |
197 | local_ptr = rcu_dereference(test_rcu_pointer); | |
1de4df4b | 198 | rcu_debug_yield_read(); |
074d8438 | 199 | if (local_ptr) |
01477510 | 200 | urcu_posix_assert(local_ptr->a == 8); |
a0b7f7ea | 201 | if (caa_unlikely(rduration)) |
074d8438 MD |
202 | loop_sleep(rduration); |
203 | rcu_read_unlock(); | |
bd252a04 | 204 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 205 | if (caa_unlikely(!test_duration_read())) |
074d8438 MD |
206 | break; |
207 | } | |
208 | ||
209 | rcu_unregister_thread(); | |
210 | ||
bd252a04 | 211 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
212 | printf_verbose("thread_end %s, tid %lu\n", |
213 | "reader", urcu_get_thread_id()); | |
074d8438 MD |
214 | return ((void*)1); |
215 | ||
216 | } | |
217 | ||
61c3fb60 | 218 | static |
074d8438 MD |
219 | void *thr_writer(void *_count) |
220 | { | |
221 | unsigned long long *count = _count; | |
222 | struct test_array *new, *old; | |
223 | ||
94df6318 MD |
224 | printf_verbose("thread_begin %s, tid %lu\n", |
225 | "writer", urcu_get_thread_id()); | |
074d8438 MD |
226 | |
227 | set_affinity(); | |
228 | ||
229 | while (!test_go) | |
230 | { | |
231 | } | |
5481ddb3 | 232 | cmm_smp_mb(); |
074d8438 MD |
233 | |
234 | for (;;) { | |
d4267b0b | 235 | rcu_copy_mutex_lock(); |
074d8438 MD |
236 | new = test_array_alloc(); |
237 | new->a = 8; | |
074d8438 MD |
238 | old = test_rcu_pointer; |
239 | rcu_assign_pointer(test_rcu_pointer, new); | |
a0b7f7ea | 240 | if (caa_unlikely(wduration)) |
31b598e0 | 241 | loop_sleep(wduration); |
074d8438 MD |
242 | synchronize_rcu(); |
243 | if (old) | |
244 | old->a = 0; | |
245 | test_array_free(old); | |
d4267b0b | 246 | rcu_copy_mutex_unlock(); |
bd252a04 | 247 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 248 | if (caa_unlikely(!test_duration_write())) |
074d8438 | 249 | break; |
a0b7f7ea | 250 | if (caa_unlikely(wdelay)) |
074d8438 MD |
251 | loop_sleep(wdelay); |
252 | } | |
253 | ||
94df6318 MD |
254 | printf_verbose("thread_end %s, tid %lu\n", |
255 | "writer", urcu_get_thread_id()); | |
bd252a04 | 256 | *count = URCU_TLS(nr_writes); |
074d8438 MD |
257 | return ((void*)2); |
258 | } | |
259 | ||
61c3fb60 | 260 | static |
70469b43 | 261 | void show_usage(char **argv) |
074d8438 | 262 | { |
06637138 MD |
263 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
264 | argv[0]); | |
265 | printf("OPTIONS:\n"); | |
06637138 | 266 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
267 | printf(" [-d delay] (writer period (us))\n"); |
268 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
269 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
270 | printf(" [-v] (verbose output)\n"); | |
271 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
074d8438 MD |
272 | printf("\n"); |
273 | } | |
274 | ||
275 | int main(int argc, char **argv) | |
276 | { | |
277 | int err; | |
278 | pthread_t *tid_reader, *tid_writer; | |
279 | void *tret; | |
280 | unsigned long long *count_reader, *count_writer; | |
281 | unsigned long long tot_reads = 0, tot_writes = 0; | |
282 | int i, a; | |
83e334d0 | 283 | unsigned int i_thr; |
074d8438 MD |
284 | |
285 | if (argc < 4) { | |
70469b43 | 286 | show_usage(argv); |
074d8438 MD |
287 | return -1; |
288 | } | |
289 | ||
290 | err = sscanf(argv[1], "%u", &nr_readers); | |
291 | if (err != 1) { | |
70469b43 | 292 | show_usage(argv); |
074d8438 MD |
293 | return -1; |
294 | } | |
295 | ||
296 | err = sscanf(argv[2], "%u", &nr_writers); | |
297 | if (err != 1) { | |
70469b43 | 298 | show_usage(argv); |
074d8438 MD |
299 | return -1; |
300 | } | |
83e334d0 | 301 | |
074d8438 MD |
302 | err = sscanf(argv[3], "%lu", &duration); |
303 | if (err != 1) { | |
70469b43 | 304 | show_usage(argv); |
074d8438 MD |
305 | return -1; |
306 | } | |
307 | ||
308 | for (i = 4; i < argc; i++) { | |
309 | if (argv[i][0] != '-') | |
310 | continue; | |
311 | switch (argv[i][1]) { | |
074d8438 | 312 | case 'r': |
2650042a | 313 | rcu_debug_yield_enable(RCU_YIELD_READ); |
074d8438 MD |
314 | break; |
315 | case 'w': | |
2650042a | 316 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
074d8438 | 317 | break; |
074d8438 MD |
318 | case 'a': |
319 | if (argc < i + 2) { | |
70469b43 | 320 | show_usage(argv); |
074d8438 MD |
321 | return -1; |
322 | } | |
323 | a = atoi(argv[++i]); | |
324 | cpu_affinities[next_aff++] = a; | |
325 | use_affinity = 1; | |
326 | printf_verbose("Adding CPU %d affinity\n", a); | |
327 | break; | |
328 | case 'c': | |
329 | if (argc < i + 2) { | |
70469b43 | 330 | show_usage(argv); |
074d8438 MD |
331 | return -1; |
332 | } | |
333 | rduration = atol(argv[++i]); | |
334 | break; | |
335 | case 'd': | |
336 | if (argc < i + 2) { | |
70469b43 | 337 | show_usage(argv); |
074d8438 MD |
338 | return -1; |
339 | } | |
340 | wdelay = atol(argv[++i]); | |
341 | break; | |
31b598e0 MD |
342 | case 'e': |
343 | if (argc < i + 2) { | |
70469b43 | 344 | show_usage(argv); |
31b598e0 MD |
345 | return -1; |
346 | } | |
347 | wduration = atol(argv[++i]); | |
348 | break; | |
074d8438 MD |
349 | case 'v': |
350 | verbose_mode = 1; | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
356 | duration, nr_readers, nr_writers); | |
357 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
358 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
359 | printf_verbose("thread %-6s, tid %lu\n", |
360 | "main", urcu_get_thread_id()); | |
074d8438 | 361 | |
92e8d9d6 | 362 | test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE); |
9aa14175 MD |
363 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
364 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
365 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
366 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
074d8438 MD |
367 | |
368 | next_aff = 0; | |
369 | ||
83e334d0 MJ |
370 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
371 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
372 | &count_reader[i_thr]); | |
074d8438 MD |
373 | if (err != 0) |
374 | exit(1); | |
375 | } | |
83e334d0 MJ |
376 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
377 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
378 | &count_writer[i_thr]); | |
074d8438 MD |
379 | if (err != 0) |
380 | exit(1); | |
381 | } | |
382 | ||
5481ddb3 | 383 | cmm_smp_mb(); |
074d8438 MD |
384 | |
385 | test_go = 1; | |
386 | ||
387 | sleep(duration); | |
388 | ||
389 | test_stop = 1; | |
390 | ||
83e334d0 MJ |
391 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
392 | err = pthread_join(tid_reader[i_thr], &tret); | |
074d8438 MD |
393 | if (err != 0) |
394 | exit(1); | |
83e334d0 | 395 | tot_reads += count_reader[i_thr]; |
074d8438 | 396 | } |
83e334d0 MJ |
397 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
398 | err = pthread_join(tid_writer[i_thr], &tret); | |
074d8438 MD |
399 | if (err != 0) |
400 | exit(1); | |
83e334d0 | 401 | tot_writes += count_writer[i_thr]; |
074d8438 | 402 | } |
83e334d0 | 403 | |
074d8438 MD |
404 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
405 | tot_writes); | |
a50a7b43 | 406 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
074d8438 MD |
407 | "nr_writers %3u " |
408 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 409 | argv[0], duration, nr_readers, rduration, wduration, |
074d8438 MD |
410 | nr_writers, wdelay, tot_reads, tot_writes, |
411 | tot_reads + tot_writes); | |
83e334d0 | 412 | |
074d8438 MD |
413 | test_array_free(test_rcu_pointer); |
414 | free(test_array); | |
415 | free(tid_reader); | |
416 | free(tid_writer); | |
417 | free(count_reader); | |
418 | free(count_writer); | |
83e334d0 | 419 | |
074d8438 MD |
420 | return 0; |
421 | } |