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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 | ||
fdee2e6d | 5 | /* |
fdee2e6d | 6 | * Userspace RCU library - test program |
fdee2e6d MD |
7 | */ |
8 | ||
fdee2e6d 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> |
fdee2e6d 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 | |
fdee2e6d MD |
25 | /* hardcoded number of CPUs */ |
26 | #define NR_CPUS 16384 | |
27 | ||
fdee2e6d MD |
28 | #ifndef DYNAMIC_LINK_TEST |
29 | #define _LGPL_SOURCE | |
fdee2e6d MD |
30 | #endif |
31 | #include <urcu-bp.h> | |
32 | ||
fdee2e6d MD |
33 | static volatile int test_go, test_stop; |
34 | ||
35 | static unsigned long wdelay; | |
36 | ||
bcc74df3 | 37 | static int *test_rcu_pointer; |
fdee2e6d MD |
38 | |
39 | static unsigned long duration; | |
40 | ||
41 | /* read-side C.S. duration, in loops */ | |
42 | static unsigned long rduration; | |
43 | ||
31b598e0 MD |
44 | /* write-side C.S. duration, in loops */ |
45 | static unsigned long wduration; | |
46 | ||
ab0aacbe | 47 | static inline void loop_sleep(unsigned long loops) |
fdee2e6d | 48 | { |
ab0aacbe | 49 | while (loops-- != 0) |
06f22bdb | 50 | caa_cpu_relax(); |
fdee2e6d MD |
51 | } |
52 | ||
53 | static int verbose_mode; | |
54 | ||
55 | #define printf_verbose(fmt, args...) \ | |
56 | do { \ | |
57 | if (verbose_mode) \ | |
58 | printf(fmt, args); \ | |
59 | } while (0) | |
60 | ||
61 | static unsigned int cpu_affinities[NR_CPUS]; | |
62 | static unsigned int next_aff = 0; | |
63 | static int use_affinity = 0; | |
64 | ||
65 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
66 | ||
67 | static void set_affinity(void) | |
68 | { | |
2388c075 | 69 | #ifdef HAVE_SCHED_SETAFFINITY |
fdee2e6d | 70 | cpu_set_t mask; |
95bc7fb9 MD |
71 | int cpu, ret; |
72 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
73 | |
74 | if (!use_affinity) | |
75 | return; | |
76 | ||
2388c075 | 77 | #ifdef HAVE_SCHED_SETAFFINITY |
fdee2e6d MD |
78 | ret = pthread_mutex_lock(&affinity_mutex); |
79 | if (ret) { | |
80 | perror("Error in pthread mutex lock"); | |
81 | exit(-1); | |
82 | } | |
83 | cpu = cpu_affinities[next_aff++]; | |
84 | ret = pthread_mutex_unlock(&affinity_mutex); | |
85 | if (ret) { | |
86 | perror("Error in pthread mutex unlock"); | |
87 | exit(-1); | |
88 | } | |
d8540fc5 | 89 | |
fdee2e6d MD |
90 | CPU_ZERO(&mask); |
91 | CPU_SET(cpu, &mask); | |
92 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 93 | #endif /* HAVE_SCHED_SETAFFINITY */ |
fdee2e6d MD |
94 | } |
95 | ||
96 | /* | |
97 | * returns 0 if test should end. | |
98 | */ | |
99 | static int test_duration_write(void) | |
100 | { | |
101 | return !test_stop; | |
102 | } | |
103 | ||
104 | static int test_duration_read(void) | |
105 | { | |
106 | return !test_stop; | |
107 | } | |
108 | ||
bd252a04 MD |
109 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
110 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
fdee2e6d MD |
111 | |
112 | static unsigned int nr_readers; | |
113 | static unsigned int nr_writers; | |
114 | ||
115 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
116 | ||
61c3fb60 | 117 | static |
fdee2e6d MD |
118 | void *thr_reader(void *_count) |
119 | { | |
120 | unsigned long long *count = _count; | |
bcc74df3 | 121 | int *local_ptr; |
fdee2e6d | 122 | |
94df6318 MD |
123 | printf_verbose("thread_begin %s, tid %lu\n", |
124 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
125 | |
126 | set_affinity(); | |
127 | ||
128 | rcu_register_thread(); | |
01477510 | 129 | urcu_posix_assert(!rcu_read_ongoing()); |
fdee2e6d MD |
130 | |
131 | while (!test_go) | |
132 | { | |
133 | } | |
5481ddb3 | 134 | cmm_smp_mb(); |
fdee2e6d MD |
135 | |
136 | for (;;) { | |
137 | rcu_read_lock(); | |
01477510 | 138 | urcu_posix_assert(rcu_read_ongoing()); |
fdee2e6d | 139 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 140 | rcu_debug_yield_read(); |
fdee2e6d | 141 | if (local_ptr) |
01477510 | 142 | urcu_posix_assert(*local_ptr == 8); |
a0b7f7ea | 143 | if (caa_unlikely(rduration)) |
fdee2e6d MD |
144 | loop_sleep(rduration); |
145 | rcu_read_unlock(); | |
bd252a04 | 146 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 147 | if (caa_unlikely(!test_duration_read())) |
fdee2e6d MD |
148 | break; |
149 | } | |
150 | ||
151 | rcu_unregister_thread(); | |
152 | ||
bd252a04 | 153 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
154 | printf_verbose("thread_end %s, tid %lu\n", |
155 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
156 | return ((void*)1); |
157 | ||
158 | } | |
159 | ||
61c3fb60 | 160 | static |
fdee2e6d MD |
161 | void *thr_writer(void *_count) |
162 | { | |
163 | unsigned long long *count = _count; | |
bcc74df3 | 164 | int *new, *old; |
fdee2e6d | 165 | |
94df6318 MD |
166 | printf_verbose("thread_begin %s, tid %lu\n", |
167 | "writer", urcu_get_thread_id()); | |
fdee2e6d MD |
168 | |
169 | set_affinity(); | |
170 | ||
171 | while (!test_go) | |
172 | { | |
173 | } | |
5481ddb3 | 174 | cmm_smp_mb(); |
fdee2e6d MD |
175 | |
176 | for (;;) { | |
bcc74df3 MD |
177 | new = malloc(sizeof(int)); |
178 | *new = 8; | |
d2835e6f | 179 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 180 | if (caa_unlikely(wduration)) |
31b598e0 | 181 | loop_sleep(wduration); |
d2835e6f | 182 | synchronize_rcu(); |
fdee2e6d | 183 | if (old) |
bcc74df3 MD |
184 | *old = 0; |
185 | free(old); | |
bd252a04 | 186 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 187 | if (caa_unlikely(!test_duration_write())) |
fdee2e6d | 188 | break; |
a0b7f7ea | 189 | if (caa_unlikely(wdelay)) |
fdee2e6d MD |
190 | loop_sleep(wdelay); |
191 | } | |
192 | ||
94df6318 MD |
193 | printf_verbose("thread_end %s, tid %lu\n", |
194 | "writer", urcu_get_thread_id()); | |
bd252a04 | 195 | *count = URCU_TLS(nr_writes); |
fdee2e6d MD |
196 | return ((void*)2); |
197 | } | |
198 | ||
61c3fb60 | 199 | static |
70469b43 | 200 | void show_usage(char **argv) |
fdee2e6d | 201 | { |
06637138 MD |
202 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
203 | argv[0]); | |
204 | printf("OPTIONS:\n"); | |
06637138 | 205 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
206 | printf(" [-d delay] (writer period (us))\n"); |
207 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
208 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
209 | printf(" [-v] (verbose output)\n"); | |
210 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
fdee2e6d MD |
211 | printf("\n"); |
212 | } | |
213 | ||
214 | int main(int argc, char **argv) | |
215 | { | |
216 | int err; | |
217 | pthread_t *tid_reader, *tid_writer; | |
218 | void *tret; | |
219 | unsigned long long *count_reader, *count_writer; | |
220 | unsigned long long tot_reads = 0, tot_writes = 0; | |
221 | int i, a; | |
83e334d0 | 222 | unsigned int i_thr; |
fdee2e6d MD |
223 | |
224 | if (argc < 4) { | |
70469b43 | 225 | show_usage(argv); |
fdee2e6d MD |
226 | return -1; |
227 | } | |
228 | ||
229 | err = sscanf(argv[1], "%u", &nr_readers); | |
230 | if (err != 1) { | |
70469b43 | 231 | show_usage(argv); |
fdee2e6d MD |
232 | return -1; |
233 | } | |
234 | ||
235 | err = sscanf(argv[2], "%u", &nr_writers); | |
236 | if (err != 1) { | |
70469b43 | 237 | show_usage(argv); |
fdee2e6d MD |
238 | return -1; |
239 | } | |
83e334d0 | 240 | |
fdee2e6d MD |
241 | err = sscanf(argv[3], "%lu", &duration); |
242 | if (err != 1) { | |
70469b43 | 243 | show_usage(argv); |
fdee2e6d MD |
244 | return -1; |
245 | } | |
246 | ||
247 | for (i = 4; i < argc; i++) { | |
248 | if (argv[i][0] != '-') | |
249 | continue; | |
250 | switch (argv[i][1]) { | |
fdee2e6d | 251 | case 'r': |
2650042a | 252 | rcu_debug_yield_enable(RCU_YIELD_READ); |
fdee2e6d MD |
253 | break; |
254 | case 'w': | |
2650042a | 255 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
fdee2e6d | 256 | break; |
fdee2e6d MD |
257 | case 'a': |
258 | if (argc < i + 2) { | |
70469b43 | 259 | show_usage(argv); |
fdee2e6d MD |
260 | return -1; |
261 | } | |
262 | a = atoi(argv[++i]); | |
263 | cpu_affinities[next_aff++] = a; | |
264 | use_affinity = 1; | |
265 | printf_verbose("Adding CPU %d affinity\n", a); | |
266 | break; | |
267 | case 'c': | |
268 | if (argc < i + 2) { | |
70469b43 | 269 | show_usage(argv); |
fdee2e6d MD |
270 | return -1; |
271 | } | |
272 | rduration = atol(argv[++i]); | |
273 | break; | |
274 | case 'd': | |
275 | if (argc < i + 2) { | |
70469b43 | 276 | show_usage(argv); |
fdee2e6d MD |
277 | return -1; |
278 | } | |
279 | wdelay = atol(argv[++i]); | |
280 | break; | |
31b598e0 MD |
281 | case 'e': |
282 | if (argc < i + 2) { | |
70469b43 | 283 | show_usage(argv); |
31b598e0 MD |
284 | return -1; |
285 | } | |
286 | wduration = atol(argv[++i]); | |
287 | break; | |
fdee2e6d MD |
288 | case 'v': |
289 | verbose_mode = 1; | |
290 | break; | |
291 | } | |
292 | } | |
293 | ||
294 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
295 | duration, nr_readers, nr_writers); | |
296 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
297 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
298 | printf_verbose("thread %-6s, tid %lu\n", |
299 | "main", urcu_get_thread_id()); | |
fdee2e6d | 300 | |
9aa14175 MD |
301 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
302 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
303 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
304 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
fdee2e6d MD |
305 | |
306 | next_aff = 0; | |
307 | ||
83e334d0 MJ |
308 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
309 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
310 | &count_reader[i_thr]); | |
fdee2e6d MD |
311 | if (err != 0) |
312 | exit(1); | |
313 | } | |
83e334d0 MJ |
314 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
315 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
316 | &count_writer[i_thr]); | |
fdee2e6d MD |
317 | if (err != 0) |
318 | exit(1); | |
319 | } | |
320 | ||
5481ddb3 | 321 | cmm_smp_mb(); |
fdee2e6d MD |
322 | |
323 | test_go = 1; | |
324 | ||
325 | sleep(duration); | |
326 | ||
327 | test_stop = 1; | |
328 | ||
83e334d0 MJ |
329 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
330 | err = pthread_join(tid_reader[i_thr], &tret); | |
fdee2e6d MD |
331 | if (err != 0) |
332 | exit(1); | |
83e334d0 | 333 | tot_reads += count_reader[i_thr]; |
fdee2e6d | 334 | } |
83e334d0 MJ |
335 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
336 | err = pthread_join(tid_writer[i_thr], &tret); | |
fdee2e6d MD |
337 | if (err != 0) |
338 | exit(1); | |
83e334d0 | 339 | tot_writes += count_writer[i_thr]; |
fdee2e6d | 340 | } |
83e334d0 | 341 | |
fdee2e6d 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 " |
fdee2e6d 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, |
fdee2e6d MD |
348 | nr_writers, wdelay, tot_reads, tot_writes, |
349 | tot_reads + tot_writes); | |
83e334d0 | 350 | |
bcc74df3 | 351 | free(test_rcu_pointer); |
fdee2e6d MD |
352 | free(tid_reader); |
353 | free(tid_writer); | |
354 | free(count_reader); | |
355 | free(count_writer); | |
83e334d0 | 356 | |
fdee2e6d MD |
357 | return 0; |
358 | } |