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 | ||
90075a50 | 5 | /* |
90075a50 | 6 | * Userspace RCU library - test program (with automatic reclamation) |
90075a50 MD |
7 | */ |
8 | ||
90075a50 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> |
90075a50 | 18 | |
ec4e58a3 | 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 | |
90075a50 MD |
25 | /* hardcoded number of CPUs */ |
26 | #define NR_CPUS 16384 | |
27 | ||
90075a50 MD |
28 | #ifndef DYNAMIC_LINK_TEST |
29 | #define _LGPL_SOURCE | |
90075a50 | 30 | #endif |
ec4e58a3 MD |
31 | #include <urcu.h> |
32 | #include <urcu-defer.h> | |
90075a50 MD |
33 | |
34 | struct test_array { | |
35 | int a; | |
36 | }; | |
37 | ||
38 | static volatile int test_go, test_stop; | |
39 | ||
40 | static unsigned long wdelay; | |
41 | ||
42 | static struct test_array *test_rcu_pointer; | |
43 | ||
44 | static unsigned long duration; | |
45 | ||
46 | /* read-side C.S. duration, in loops */ | |
47 | static unsigned long rduration; | |
48 | ||
31b598e0 MD |
49 | /* write-side C.S. duration, in loops */ |
50 | static unsigned long wduration; | |
51 | ||
ab0aacbe | 52 | static inline void loop_sleep(unsigned long loops) |
90075a50 | 53 | { |
ab0aacbe | 54 | while (loops-- != 0) |
06f22bdb | 55 | caa_cpu_relax(); |
90075a50 MD |
56 | } |
57 | ||
58 | static int verbose_mode; | |
59 | ||
60 | #define printf_verbose(fmt, args...) \ | |
61 | do { \ | |
62 | if (verbose_mode) \ | |
63 | printf(fmt, args); \ | |
64 | } while (0) | |
65 | ||
66 | static unsigned int cpu_affinities[NR_CPUS]; | |
67 | static unsigned int next_aff = 0; | |
68 | static int use_affinity = 0; | |
69 | ||
70 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
71 | ||
72 | static void set_affinity(void) | |
73 | { | |
2388c075 | 74 | #ifdef HAVE_SCHED_SETAFFINITY |
90075a50 | 75 | cpu_set_t mask; |
95bc7fb9 MD |
76 | int cpu, ret; |
77 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
90075a50 MD |
78 | |
79 | if (!use_affinity) | |
80 | return; | |
81 | ||
2388c075 | 82 | #ifdef HAVE_SCHED_SETAFFINITY |
90075a50 MD |
83 | ret = pthread_mutex_lock(&affinity_mutex); |
84 | if (ret) { | |
85 | perror("Error in pthread mutex lock"); | |
86 | exit(-1); | |
87 | } | |
88 | cpu = cpu_affinities[next_aff++]; | |
89 | ret = pthread_mutex_unlock(&affinity_mutex); | |
90 | if (ret) { | |
91 | perror("Error in pthread mutex unlock"); | |
92 | exit(-1); | |
93 | } | |
d8540fc5 | 94 | |
90075a50 MD |
95 | CPU_ZERO(&mask); |
96 | CPU_SET(cpu, &mask); | |
97 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 98 | #endif /* HAVE_SCHED_SETAFFINITY */ |
90075a50 MD |
99 | } |
100 | ||
101 | /* | |
102 | * returns 0 if test should end. | |
103 | */ | |
104 | static int test_duration_write(void) | |
105 | { | |
106 | return !test_stop; | |
107 | } | |
108 | ||
109 | static int test_duration_read(void) | |
110 | { | |
111 | return !test_stop; | |
112 | } | |
113 | ||
bd252a04 MD |
114 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
115 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
90075a50 MD |
116 | |
117 | static | |
06f22bdb | 118 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
90075a50 MD |
119 | |
120 | static unsigned int nr_readers; | |
121 | static unsigned int nr_writers; | |
122 | ||
123 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
124 | ||
61c3fb60 | 125 | static |
90075a50 MD |
126 | void *thr_reader(void *_count) |
127 | { | |
128 | unsigned long long *count = _count; | |
129 | struct test_array *local_ptr; | |
130 | ||
94df6318 MD |
131 | printf_verbose("thread_begin %s, tid %lu\n", |
132 | "reader", urcu_get_thread_id()); | |
90075a50 MD |
133 | |
134 | set_affinity(); | |
135 | ||
136 | rcu_register_thread(); | |
137 | ||
138 | while (!test_go) | |
139 | { | |
140 | } | |
5481ddb3 | 141 | cmm_smp_mb(); |
90075a50 MD |
142 | |
143 | for (;;) { | |
144 | rcu_read_lock(); | |
145 | local_ptr = rcu_dereference(test_rcu_pointer); | |
1de4df4b | 146 | rcu_debug_yield_read(); |
90075a50 | 147 | if (local_ptr) |
01477510 | 148 | urcu_posix_assert(local_ptr->a == 8); |
a0b7f7ea | 149 | if (caa_unlikely(rduration)) |
90075a50 MD |
150 | loop_sleep(rduration); |
151 | rcu_read_unlock(); | |
bd252a04 | 152 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 153 | if (caa_unlikely(!test_duration_read())) |
90075a50 MD |
154 | break; |
155 | } | |
156 | ||
157 | rcu_unregister_thread(); | |
158 | ||
bd252a04 | 159 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
160 | printf_verbose("thread_end %s, tid %lu\n", |
161 | "reader", urcu_get_thread_id()); | |
90075a50 MD |
162 | return ((void*)1); |
163 | ||
164 | } | |
165 | ||
70469b43 | 166 | static void test_cb2(void *data __attribute__((unused))) |
804b4375 MD |
167 | { |
168 | } | |
169 | ||
70469b43 | 170 | static void test_cb1(void *data __attribute__((unused))) |
804b4375 MD |
171 | { |
172 | } | |
173 | ||
61c3fb60 | 174 | static |
90075a50 MD |
175 | void *thr_writer(void *data) |
176 | { | |
177 | unsigned long wtidx = (unsigned long)data; | |
178 | struct test_array *new, *old = NULL; | |
6ade67d5 | 179 | int ret; |
90075a50 | 180 | |
94df6318 MD |
181 | printf_verbose("thread_begin %s, tid %lu\n", |
182 | "writer", urcu_get_thread_id()); | |
90075a50 MD |
183 | |
184 | set_affinity(); | |
185 | ||
6ade67d5 MD |
186 | ret = rcu_defer_register_thread(); |
187 | if (ret) { | |
188 | printf("Error in rcu_defer_register_thread\n"); | |
189 | exit(-1); | |
190 | } | |
90075a50 MD |
191 | |
192 | while (!test_go) | |
193 | { | |
194 | } | |
5481ddb3 | 195 | cmm_smp_mb(); |
90075a50 MD |
196 | |
197 | for (;;) { | |
198 | new = malloc(sizeof(*new)); | |
199 | new->a = 8; | |
200 | old = rcu_xchg_pointer(&test_rcu_pointer, new); | |
a0b7f7ea | 201 | if (caa_unlikely(wduration)) |
31b598e0 | 202 | loop_sleep(wduration); |
b4f313b7 MD |
203 | defer_rcu(free, old); |
204 | defer_rcu(test_cb1, old); | |
205 | defer_rcu(test_cb1, (void *)-2L); | |
206 | defer_rcu(test_cb1, (void *)-2L); | |
207 | defer_rcu(test_cb1, old); | |
208 | defer_rcu(test_cb2, (void *)-2L); | |
209 | defer_rcu(test_cb2, (void *)-4L); | |
210 | defer_rcu(test_cb2, (void *)-2L); | |
bd252a04 | 211 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 212 | if (caa_unlikely(!test_duration_write())) |
90075a50 | 213 | break; |
a0b7f7ea | 214 | if (caa_unlikely(wdelay)) |
90075a50 MD |
215 | loop_sleep(wdelay); |
216 | } | |
217 | ||
786ee85b | 218 | rcu_defer_unregister_thread(); |
90075a50 | 219 | |
94df6318 MD |
220 | printf_verbose("thread_end %s, tid %lu\n", |
221 | "writer", urcu_get_thread_id()); | |
bd252a04 | 222 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
90075a50 MD |
223 | return ((void*)2); |
224 | } | |
225 | ||
61c3fb60 | 226 | static |
70469b43 | 227 | void show_usage(char **argv) |
90075a50 | 228 | { |
06637138 MD |
229 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
230 | argv[0]); | |
231 | printf("OPTIONS:\n"); | |
06637138 | 232 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
233 | printf(" [-d delay] (writer period (us))\n"); |
234 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
235 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
236 | printf(" [-v] (verbose output)\n"); | |
237 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
90075a50 MD |
238 | printf("\n"); |
239 | } | |
240 | ||
241 | int main(int argc, char **argv) | |
242 | { | |
243 | int err; | |
244 | pthread_t *tid_reader, *tid_writer; | |
245 | void *tret; | |
246 | unsigned long long *count_reader; | |
247 | unsigned long long tot_reads = 0, tot_writes = 0; | |
248 | int i, a; | |
83e334d0 | 249 | unsigned int i_thr; |
90075a50 MD |
250 | |
251 | if (argc < 4) { | |
70469b43 | 252 | show_usage(argv); |
90075a50 MD |
253 | return -1; |
254 | } | |
255 | ||
256 | err = sscanf(argv[1], "%u", &nr_readers); | |
257 | if (err != 1) { | |
70469b43 | 258 | show_usage(argv); |
90075a50 MD |
259 | return -1; |
260 | } | |
261 | ||
262 | err = sscanf(argv[2], "%u", &nr_writers); | |
263 | if (err != 1) { | |
70469b43 | 264 | show_usage(argv); |
90075a50 MD |
265 | return -1; |
266 | } | |
83e334d0 | 267 | |
90075a50 MD |
268 | err = sscanf(argv[3], "%lu", &duration); |
269 | if (err != 1) { | |
70469b43 | 270 | show_usage(argv); |
90075a50 MD |
271 | return -1; |
272 | } | |
273 | ||
274 | for (i = 4; i < argc; i++) { | |
275 | if (argv[i][0] != '-') | |
276 | continue; | |
277 | switch (argv[i][1]) { | |
90075a50 | 278 | case 'r': |
2650042a | 279 | rcu_debug_yield_enable(RCU_YIELD_READ); |
90075a50 MD |
280 | break; |
281 | case 'w': | |
2650042a | 282 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
90075a50 | 283 | break; |
90075a50 MD |
284 | case 'a': |
285 | if (argc < i + 2) { | |
70469b43 | 286 | show_usage(argv); |
90075a50 MD |
287 | return -1; |
288 | } | |
289 | a = atoi(argv[++i]); | |
290 | cpu_affinities[next_aff++] = a; | |
291 | use_affinity = 1; | |
292 | printf_verbose("Adding CPU %d affinity\n", a); | |
293 | break; | |
294 | case 'c': | |
295 | if (argc < i + 2) { | |
70469b43 | 296 | show_usage(argv); |
90075a50 MD |
297 | return -1; |
298 | } | |
299 | rduration = atol(argv[++i]); | |
300 | break; | |
301 | case 'd': | |
302 | if (argc < i + 2) { | |
70469b43 | 303 | show_usage(argv); |
90075a50 MD |
304 | return -1; |
305 | } | |
306 | wdelay = atol(argv[++i]); | |
307 | break; | |
31b598e0 MD |
308 | case 'e': |
309 | if (argc < i + 2) { | |
70469b43 | 310 | show_usage(argv); |
31b598e0 MD |
311 | return -1; |
312 | } | |
313 | wduration = atol(argv[++i]); | |
314 | break; | |
90075a50 MD |
315 | case 'v': |
316 | verbose_mode = 1; | |
317 | break; | |
318 | } | |
319 | } | |
320 | ||
321 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
322 | duration, nr_readers, nr_writers); | |
323 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
324 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
325 | printf_verbose("thread %-6s, tid %lu\n", |
326 | "main", urcu_get_thread_id()); | |
90075a50 | 327 | |
9aa14175 MD |
328 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
329 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
330 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
331 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
90075a50 MD |
332 | |
333 | next_aff = 0; | |
334 | ||
83e334d0 MJ |
335 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
336 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
337 | &count_reader[i_thr]); | |
90075a50 MD |
338 | if (err != 0) |
339 | exit(1); | |
340 | } | |
83e334d0 MJ |
341 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
342 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
343 | (void *)(long)i_thr); | |
90075a50 MD |
344 | if (err != 0) |
345 | exit(1); | |
346 | } | |
347 | ||
5481ddb3 | 348 | cmm_smp_mb(); |
90075a50 MD |
349 | |
350 | test_go = 1; | |
351 | ||
352 | sleep(duration); | |
353 | ||
354 | test_stop = 1; | |
355 | ||
83e334d0 MJ |
356 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
357 | err = pthread_join(tid_reader[i_thr], &tret); | |
90075a50 MD |
358 | if (err != 0) |
359 | exit(1); | |
83e334d0 | 360 | tot_reads += count_reader[i_thr]; |
90075a50 | 361 | } |
83e334d0 MJ |
362 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
363 | err = pthread_join(tid_writer[i_thr], &tret); | |
90075a50 MD |
364 | if (err != 0) |
365 | exit(1); | |
83e334d0 | 366 | tot_writes += tot_nr_writes[i_thr]; |
90075a50 | 367 | } |
83e334d0 | 368 | |
90075a50 MD |
369 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
370 | tot_writes); | |
a50a7b43 | 371 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
90075a50 MD |
372 | "nr_writers %3u " |
373 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 374 | argv[0], duration, nr_readers, rduration, wduration, |
90075a50 MD |
375 | nr_writers, wdelay, tot_reads, tot_writes, |
376 | tot_reads + tot_writes); | |
377 | free(tid_reader); | |
378 | free(tid_writer); | |
379 | free(count_reader); | |
380 | free(tot_nr_writes); | |
381 | ||
382 | return 0; | |
383 | } |