Commit | Line | Data |
---|---|---|
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 | ||
90075a50 MD |
38 | static unsigned long wdelay; |
39 | ||
40 | static struct test_array *test_rcu_pointer; | |
41 | ||
42 | static unsigned long duration; | |
43 | ||
44 | /* read-side C.S. duration, in loops */ | |
45 | static unsigned long rduration; | |
46 | ||
31b598e0 MD |
47 | /* write-side C.S. duration, in loops */ |
48 | static unsigned long wduration; | |
49 | ||
ab0aacbe | 50 | static inline void loop_sleep(unsigned long loops) |
90075a50 | 51 | { |
ab0aacbe | 52 | while (loops-- != 0) |
06f22bdb | 53 | caa_cpu_relax(); |
90075a50 MD |
54 | } |
55 | ||
56 | static int verbose_mode; | |
57 | ||
58 | #define printf_verbose(fmt, args...) \ | |
59 | do { \ | |
60 | if (verbose_mode) \ | |
61 | printf(fmt, args); \ | |
62 | } while (0) | |
63 | ||
64 | static unsigned int cpu_affinities[NR_CPUS]; | |
65 | static unsigned int next_aff = 0; | |
66 | static int use_affinity = 0; | |
67 | ||
68 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
69 | ||
70 | static void set_affinity(void) | |
71 | { | |
2388c075 | 72 | #ifdef HAVE_SCHED_SETAFFINITY |
90075a50 | 73 | cpu_set_t mask; |
95bc7fb9 MD |
74 | int cpu, ret; |
75 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
90075a50 MD |
76 | |
77 | if (!use_affinity) | |
78 | return; | |
79 | ||
2388c075 | 80 | #ifdef HAVE_SCHED_SETAFFINITY |
90075a50 MD |
81 | ret = pthread_mutex_lock(&affinity_mutex); |
82 | if (ret) { | |
83 | perror("Error in pthread mutex lock"); | |
84 | exit(-1); | |
85 | } | |
86 | cpu = cpu_affinities[next_aff++]; | |
87 | ret = pthread_mutex_unlock(&affinity_mutex); | |
88 | if (ret) { | |
89 | perror("Error in pthread mutex unlock"); | |
90 | exit(-1); | |
91 | } | |
d8540fc5 | 92 | |
90075a50 MD |
93 | CPU_ZERO(&mask); |
94 | CPU_SET(cpu, &mask); | |
95 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 96 | #endif /* HAVE_SCHED_SETAFFINITY */ |
90075a50 MD |
97 | } |
98 | ||
bd252a04 MD |
99 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
100 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
90075a50 MD |
101 | |
102 | static | |
06f22bdb | 103 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
90075a50 MD |
104 | |
105 | static unsigned int nr_readers; | |
106 | static unsigned int nr_writers; | |
107 | ||
108 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
109 | ||
61c3fb60 | 110 | static |
90075a50 MD |
111 | void *thr_reader(void *_count) |
112 | { | |
113 | unsigned long long *count = _count; | |
114 | struct test_array *local_ptr; | |
115 | ||
94df6318 MD |
116 | printf_verbose("thread_begin %s, tid %lu\n", |
117 | "reader", urcu_get_thread_id()); | |
90075a50 MD |
118 | |
119 | set_affinity(); | |
120 | ||
121 | rcu_register_thread(); | |
122 | ||
9e4e7ad1 | 123 | wait_until_go(); |
90075a50 MD |
124 | |
125 | for (;;) { | |
126 | rcu_read_lock(); | |
127 | local_ptr = rcu_dereference(test_rcu_pointer); | |
1de4df4b | 128 | rcu_debug_yield_read(); |
90075a50 | 129 | if (local_ptr) |
01477510 | 130 | urcu_posix_assert(local_ptr->a == 8); |
a0b7f7ea | 131 | if (caa_unlikely(rduration)) |
90075a50 MD |
132 | loop_sleep(rduration); |
133 | rcu_read_unlock(); | |
bd252a04 | 134 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 135 | if (caa_unlikely(!test_duration_read())) |
90075a50 MD |
136 | break; |
137 | } | |
138 | ||
139 | rcu_unregister_thread(); | |
140 | ||
bd252a04 | 141 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
142 | printf_verbose("thread_end %s, tid %lu\n", |
143 | "reader", urcu_get_thread_id()); | |
90075a50 MD |
144 | return ((void*)1); |
145 | ||
146 | } | |
147 | ||
70469b43 | 148 | static void test_cb2(void *data __attribute__((unused))) |
804b4375 MD |
149 | { |
150 | } | |
151 | ||
70469b43 | 152 | static void test_cb1(void *data __attribute__((unused))) |
804b4375 MD |
153 | { |
154 | } | |
155 | ||
61c3fb60 | 156 | static |
90075a50 MD |
157 | void *thr_writer(void *data) |
158 | { | |
159 | unsigned long wtidx = (unsigned long)data; | |
160 | struct test_array *new, *old = NULL; | |
6ade67d5 | 161 | int ret; |
90075a50 | 162 | |
94df6318 MD |
163 | printf_verbose("thread_begin %s, tid %lu\n", |
164 | "writer", urcu_get_thread_id()); | |
90075a50 MD |
165 | |
166 | set_affinity(); | |
167 | ||
6ade67d5 MD |
168 | ret = rcu_defer_register_thread(); |
169 | if (ret) { | |
170 | printf("Error in rcu_defer_register_thread\n"); | |
171 | exit(-1); | |
172 | } | |
90075a50 | 173 | |
9e4e7ad1 | 174 | wait_until_go(); |
90075a50 MD |
175 | |
176 | for (;;) { | |
177 | new = malloc(sizeof(*new)); | |
178 | new->a = 8; | |
179 | old = rcu_xchg_pointer(&test_rcu_pointer, new); | |
a0b7f7ea | 180 | if (caa_unlikely(wduration)) |
31b598e0 | 181 | loop_sleep(wduration); |
b4f313b7 MD |
182 | defer_rcu(free, old); |
183 | defer_rcu(test_cb1, old); | |
184 | defer_rcu(test_cb1, (void *)-2L); | |
185 | defer_rcu(test_cb1, (void *)-2L); | |
186 | defer_rcu(test_cb1, old); | |
187 | defer_rcu(test_cb2, (void *)-2L); | |
188 | defer_rcu(test_cb2, (void *)-4L); | |
189 | defer_rcu(test_cb2, (void *)-2L); | |
bd252a04 | 190 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 191 | if (caa_unlikely(!test_duration_write())) |
90075a50 | 192 | break; |
a0b7f7ea | 193 | if (caa_unlikely(wdelay)) |
90075a50 MD |
194 | loop_sleep(wdelay); |
195 | } | |
196 | ||
786ee85b | 197 | rcu_defer_unregister_thread(); |
90075a50 | 198 | |
94df6318 MD |
199 | printf_verbose("thread_end %s, tid %lu\n", |
200 | "writer", urcu_get_thread_id()); | |
bd252a04 | 201 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
90075a50 MD |
202 | return ((void*)2); |
203 | } | |
204 | ||
61c3fb60 | 205 | static |
70469b43 | 206 | void show_usage(char **argv) |
90075a50 | 207 | { |
06637138 MD |
208 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
209 | argv[0]); | |
210 | printf("OPTIONS:\n"); | |
06637138 | 211 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
212 | printf(" [-d delay] (writer period (us))\n"); |
213 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
214 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
215 | printf(" [-v] (verbose output)\n"); | |
216 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
90075a50 MD |
217 | printf("\n"); |
218 | } | |
219 | ||
220 | int main(int argc, char **argv) | |
221 | { | |
222 | int err; | |
223 | pthread_t *tid_reader, *tid_writer; | |
224 | void *tret; | |
225 | unsigned long long *count_reader; | |
226 | unsigned long long tot_reads = 0, tot_writes = 0; | |
227 | int i, a; | |
83e334d0 | 228 | unsigned int i_thr; |
90075a50 MD |
229 | |
230 | if (argc < 4) { | |
70469b43 | 231 | show_usage(argv); |
90075a50 MD |
232 | return -1; |
233 | } | |
234 | ||
235 | err = sscanf(argv[1], "%u", &nr_readers); | |
236 | if (err != 1) { | |
70469b43 | 237 | show_usage(argv); |
90075a50 MD |
238 | return -1; |
239 | } | |
240 | ||
241 | err = sscanf(argv[2], "%u", &nr_writers); | |
242 | if (err != 1) { | |
70469b43 | 243 | show_usage(argv); |
90075a50 MD |
244 | return -1; |
245 | } | |
83e334d0 | 246 | |
90075a50 MD |
247 | err = sscanf(argv[3], "%lu", &duration); |
248 | if (err != 1) { | |
70469b43 | 249 | show_usage(argv); |
90075a50 MD |
250 | return -1; |
251 | } | |
252 | ||
253 | for (i = 4; i < argc; i++) { | |
254 | if (argv[i][0] != '-') | |
255 | continue; | |
256 | switch (argv[i][1]) { | |
90075a50 | 257 | case 'r': |
2650042a | 258 | rcu_debug_yield_enable(RCU_YIELD_READ); |
90075a50 MD |
259 | break; |
260 | case 'w': | |
2650042a | 261 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
90075a50 | 262 | break; |
90075a50 MD |
263 | case 'a': |
264 | if (argc < i + 2) { | |
70469b43 | 265 | show_usage(argv); |
90075a50 MD |
266 | return -1; |
267 | } | |
268 | a = atoi(argv[++i]); | |
269 | cpu_affinities[next_aff++] = a; | |
270 | use_affinity = 1; | |
271 | printf_verbose("Adding CPU %d affinity\n", a); | |
272 | break; | |
273 | case 'c': | |
274 | if (argc < i + 2) { | |
70469b43 | 275 | show_usage(argv); |
90075a50 MD |
276 | return -1; |
277 | } | |
278 | rduration = atol(argv[++i]); | |
279 | break; | |
280 | case 'd': | |
281 | if (argc < i + 2) { | |
70469b43 | 282 | show_usage(argv); |
90075a50 MD |
283 | return -1; |
284 | } | |
285 | wdelay = atol(argv[++i]); | |
286 | break; | |
31b598e0 MD |
287 | case 'e': |
288 | if (argc < i + 2) { | |
70469b43 | 289 | show_usage(argv); |
31b598e0 MD |
290 | return -1; |
291 | } | |
292 | wduration = atol(argv[++i]); | |
293 | break; | |
90075a50 MD |
294 | case 'v': |
295 | verbose_mode = 1; | |
296 | break; | |
297 | } | |
298 | } | |
299 | ||
300 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
301 | duration, nr_readers, nr_writers); | |
302 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
303 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
304 | printf_verbose("thread %-6s, tid %lu\n", |
305 | "main", urcu_get_thread_id()); | |
90075a50 | 306 | |
9aa14175 MD |
307 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
308 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
309 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
310 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
90075a50 MD |
311 | |
312 | next_aff = 0; | |
313 | ||
83e334d0 MJ |
314 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
315 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
316 | &count_reader[i_thr]); | |
90075a50 MD |
317 | if (err != 0) |
318 | exit(1); | |
319 | } | |
83e334d0 MJ |
320 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
321 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
322 | (void *)(long)i_thr); | |
90075a50 MD |
323 | if (err != 0) |
324 | exit(1); | |
325 | } | |
326 | ||
9e4e7ad1 | 327 | test_for(duration); |
90075a50 | 328 | |
83e334d0 MJ |
329 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
330 | err = pthread_join(tid_reader[i_thr], &tret); | |
90075a50 MD |
331 | if (err != 0) |
332 | exit(1); | |
83e334d0 | 333 | tot_reads += count_reader[i_thr]; |
90075a50 | 334 | } |
83e334d0 MJ |
335 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
336 | err = pthread_join(tid_writer[i_thr], &tret); | |
90075a50 MD |
337 | if (err != 0) |
338 | exit(1); | |
83e334d0 | 339 | tot_writes += tot_nr_writes[i_thr]; |
90075a50 | 340 | } |
83e334d0 | 341 | |
90075a50 MD |
342 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
343 | tot_writes); | |
a50a7b43 | 344 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
90075a50 MD |
345 | "nr_writers %3u " |
346 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 347 | argv[0], duration, nr_readers, rduration, wduration, |
90075a50 MD |
348 | nr_writers, wdelay, tot_reads, tot_writes, |
349 | tot_reads + tot_writes); | |
350 | free(tid_reader); | |
351 | free(tid_writer); | |
352 | free(count_reader); | |
353 | free(tot_nr_writes); | |
354 | ||
355 | return 0; | |
356 | } |