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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 | ||
de10a585 | 5 | /* |
de10a585 | 6 | * Userspace RCU library - test program |
de10a585 MD |
7 | */ |
8 | ||
de10a585 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> | |
de10a585 MD |
17 | #include <errno.h> |
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" |
de10a585 MD |
24 | |
25 | /* hardcoded number of CPUs */ | |
26 | #define NR_CPUS 16384 | |
27 | ||
de10a585 MD |
28 | #ifndef DYNAMIC_LINK_TEST |
29 | #define _LGPL_SOURCE | |
de10a585 MD |
30 | #endif |
31 | #include "urcu-qsbr.h" | |
32 | ||
de10a585 MD |
33 | static volatile int test_go, test_stop; |
34 | ||
35 | static unsigned long wdelay; | |
36 | ||
bcc74df3 | 37 | static int *test_rcu_pointer; |
de10a585 MD |
38 | |
39 | static unsigned long duration; | |
40 | ||
41 | /* read-side C.S. duration, in loops */ | |
42 | static unsigned long rduration; | |
43 | ||
44 | /* write-side C.S. duration, in loops */ | |
45 | static unsigned long wduration; | |
46 | ||
ab0aacbe | 47 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 48 | { |
ab0aacbe | 49 | while (loops-- != 0) |
de10a585 MD |
50 | caa_cpu_relax(); |
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 | ||
de10a585 MD |
67 | static void set_affinity(void) |
68 | { | |
2388c075 | 69 | #ifdef HAVE_SCHED_SETAFFINITY |
de10a585 | 70 | cpu_set_t mask; |
95bc7fb9 MD |
71 | int cpu, ret; |
72 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
73 | |
74 | if (!use_affinity) | |
75 | return; | |
76 | ||
2388c075 | 77 | #ifdef HAVE_SCHED_SETAFFINITY |
de10a585 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 | } | |
89 | CPU_ZERO(&mask); | |
90 | CPU_SET(cpu, &mask); | |
de10a585 | 91 | sched_setaffinity(0, sizeof(mask), &mask); |
de10a585 MD |
92 | #endif /* HAVE_SCHED_SETAFFINITY */ |
93 | } | |
94 | ||
95 | /* | |
96 | * returns 0 if test should end. | |
97 | */ | |
98 | static int test_duration_write(void) | |
99 | { | |
100 | return !test_stop; | |
101 | } | |
102 | ||
103 | static int test_duration_read(void) | |
104 | { | |
105 | return !test_stop; | |
106 | } | |
107 | ||
bd252a04 MD |
108 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
109 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
110 | |
111 | static unsigned int nr_readers; | |
112 | static unsigned int nr_writers; | |
113 | ||
114 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
115 | ||
61c3fb60 | 116 | static |
de10a585 MD |
117 | void *thr_reader(void *_count) |
118 | { | |
119 | unsigned long long *count = _count; | |
bcc74df3 | 120 | int *local_ptr; |
de10a585 | 121 | |
94df6318 MD |
122 | printf_verbose("thread_begin %s, tid %lu\n", |
123 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
124 | |
125 | set_affinity(); | |
126 | ||
127 | rcu_register_thread(); | |
128 | ||
01477510 | 129 | urcu_posix_assert(rcu_read_ongoing()); |
882f3357 | 130 | rcu_thread_offline(); |
01477510 | 131 | urcu_posix_assert(!rcu_read_ongoing()); |
882f3357 MD |
132 | rcu_thread_online(); |
133 | ||
de10a585 MD |
134 | while (!test_go) |
135 | { | |
136 | } | |
137 | cmm_smp_mb(); | |
138 | ||
139 | for (;;) { | |
140 | rcu_read_lock(); | |
01477510 | 141 | urcu_posix_assert(rcu_read_ongoing()); |
de10a585 | 142 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 143 | rcu_debug_yield_read(); |
de10a585 | 144 | if (local_ptr) |
01477510 | 145 | urcu_posix_assert(*local_ptr == 8); |
a0b7f7ea | 146 | if (caa_unlikely(rduration)) |
de10a585 MD |
147 | loop_sleep(rduration); |
148 | rcu_read_unlock(); | |
bd252a04 | 149 | URCU_TLS(nr_reads)++; |
de10a585 | 150 | /* QS each 1024 reads */ |
bd252a04 | 151 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 152 | rcu_quiescent_state(); |
a0b7f7ea | 153 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
154 | break; |
155 | } | |
156 | ||
157 | rcu_unregister_thread(); | |
158 | ||
159 | /* test extra thread registration */ | |
160 | rcu_register_thread(); | |
161 | rcu_unregister_thread(); | |
162 | ||
bd252a04 | 163 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
164 | printf_verbose("thread_end %s, tid %lu\n", |
165 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
166 | return ((void*)1); |
167 | ||
168 | } | |
169 | ||
61c3fb60 | 170 | static |
de10a585 MD |
171 | void *thr_writer(void *_count) |
172 | { | |
173 | unsigned long long *count = _count; | |
bcc74df3 | 174 | int *new, *old; |
de10a585 | 175 | |
94df6318 MD |
176 | printf_verbose("thread_begin %s, tid %lu\n", |
177 | "writer", urcu_get_thread_id()); | |
de10a585 MD |
178 | |
179 | set_affinity(); | |
180 | ||
181 | while (!test_go) | |
182 | { | |
183 | } | |
184 | cmm_smp_mb(); | |
185 | ||
186 | for (;;) { | |
bcc74df3 | 187 | new = malloc(sizeof(int)); |
01477510 | 188 | urcu_posix_assert(new); |
bcc74df3 | 189 | *new = 8; |
de10a585 | 190 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 191 | if (caa_unlikely(wduration)) |
de10a585 MD |
192 | loop_sleep(wduration); |
193 | synchronize_rcu(); | |
de10a585 | 194 | if (old) |
bcc74df3 MD |
195 | *old = 0; |
196 | free(old); | |
bd252a04 | 197 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 198 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 199 | break; |
a0b7f7ea | 200 | if (caa_unlikely(wdelay)) |
de10a585 MD |
201 | loop_sleep(wdelay); |
202 | } | |
203 | ||
94df6318 MD |
204 | printf_verbose("thread_end %s, tid %lu\n", |
205 | "writer", urcu_get_thread_id()); | |
bd252a04 | 206 | *count = URCU_TLS(nr_writes); |
de10a585 MD |
207 | return ((void*)2); |
208 | } | |
209 | ||
61c3fb60 | 210 | static |
70469b43 | 211 | void show_usage(char **argv) |
de10a585 | 212 | { |
06637138 MD |
213 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
214 | argv[0]); | |
215 | printf("OPTIONS:\n"); | |
06637138 | 216 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
217 | printf(" [-d delay] (writer period (us))\n"); |
218 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
219 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
220 | printf(" [-v] (verbose output)\n"); | |
221 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
de10a585 MD |
222 | printf("\n"); |
223 | } | |
224 | ||
225 | int main(int argc, char **argv) | |
226 | { | |
227 | int err; | |
228 | pthread_t *tid_reader, *tid_writer; | |
229 | void *tret; | |
230 | unsigned long long *count_reader, *count_writer; | |
231 | unsigned long long tot_reads = 0, tot_writes = 0; | |
232 | int i, a; | |
83e334d0 | 233 | unsigned int i_thr; |
de10a585 MD |
234 | |
235 | if (argc < 4) { | |
70469b43 | 236 | show_usage(argv); |
de10a585 MD |
237 | return -1; |
238 | } | |
239 | ||
240 | err = sscanf(argv[1], "%u", &nr_readers); | |
241 | if (err != 1) { | |
70469b43 | 242 | show_usage(argv); |
de10a585 MD |
243 | return -1; |
244 | } | |
245 | ||
246 | err = sscanf(argv[2], "%u", &nr_writers); | |
247 | if (err != 1) { | |
70469b43 | 248 | show_usage(argv); |
de10a585 MD |
249 | return -1; |
250 | } | |
83e334d0 | 251 | |
de10a585 MD |
252 | err = sscanf(argv[3], "%lu", &duration); |
253 | if (err != 1) { | |
70469b43 | 254 | show_usage(argv); |
de10a585 MD |
255 | return -1; |
256 | } | |
257 | ||
258 | for (i = 4; i < argc; i++) { | |
259 | if (argv[i][0] != '-') | |
260 | continue; | |
261 | switch (argv[i][1]) { | |
de10a585 | 262 | case 'r': |
2650042a | 263 | rcu_debug_yield_enable(RCU_YIELD_READ); |
de10a585 MD |
264 | break; |
265 | case 'w': | |
2650042a | 266 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
de10a585 | 267 | break; |
de10a585 MD |
268 | case 'a': |
269 | if (argc < i + 2) { | |
70469b43 | 270 | show_usage(argv); |
de10a585 MD |
271 | return -1; |
272 | } | |
273 | a = atoi(argv[++i]); | |
274 | cpu_affinities[next_aff++] = a; | |
275 | use_affinity = 1; | |
276 | printf_verbose("Adding CPU %d affinity\n", a); | |
277 | break; | |
278 | case 'c': | |
279 | if (argc < i + 2) { | |
70469b43 | 280 | show_usage(argv); |
de10a585 MD |
281 | return -1; |
282 | } | |
283 | rduration = atol(argv[++i]); | |
284 | break; | |
285 | case 'd': | |
286 | if (argc < i + 2) { | |
70469b43 | 287 | show_usage(argv); |
de10a585 MD |
288 | return -1; |
289 | } | |
290 | wdelay = atol(argv[++i]); | |
291 | break; | |
292 | case 'e': | |
293 | if (argc < i + 2) { | |
70469b43 | 294 | show_usage(argv); |
de10a585 MD |
295 | return -1; |
296 | } | |
297 | wduration = atol(argv[++i]); | |
298 | break; | |
299 | case 'v': | |
300 | verbose_mode = 1; | |
301 | break; | |
302 | } | |
303 | } | |
304 | ||
305 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
306 | duration, nr_readers, nr_writers); | |
307 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
308 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
309 | printf_verbose("thread %-6s, tid %lu\n", |
310 | "main", urcu_get_thread_id()); | |
de10a585 | 311 | |
9aa14175 MD |
312 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
313 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
314 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
315 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
de10a585 MD |
316 | |
317 | next_aff = 0; | |
318 | ||
83e334d0 MJ |
319 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
320 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
321 | &count_reader[i_thr]); | |
de10a585 MD |
322 | if (err != 0) |
323 | exit(1); | |
324 | } | |
83e334d0 MJ |
325 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
326 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
327 | &count_writer[i_thr]); | |
de10a585 MD |
328 | if (err != 0) |
329 | exit(1); | |
330 | } | |
331 | ||
332 | cmm_smp_mb(); | |
333 | ||
334 | test_go = 1; | |
335 | ||
336 | sleep(duration); | |
337 | ||
338 | test_stop = 1; | |
339 | ||
83e334d0 MJ |
340 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
341 | err = pthread_join(tid_reader[i_thr], &tret); | |
de10a585 MD |
342 | if (err != 0) |
343 | exit(1); | |
83e334d0 | 344 | tot_reads += count_reader[i_thr]; |
de10a585 | 345 | } |
83e334d0 MJ |
346 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
347 | err = pthread_join(tid_writer[i_thr], &tret); | |
de10a585 MD |
348 | if (err != 0) |
349 | exit(1); | |
83e334d0 | 350 | tot_writes += count_writer[i_thr]; |
de10a585 | 351 | } |
83e334d0 | 352 | |
de10a585 MD |
353 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
354 | tot_writes); | |
355 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
356 | "nr_writers %3u " | |
357 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
358 | argv[0], duration, nr_readers, rduration, wduration, | |
359 | nr_writers, wdelay, tot_reads, tot_writes, | |
360 | tot_reads + tot_writes); | |
bcc74df3 | 361 | free(test_rcu_pointer); |
de10a585 MD |
362 | free(tid_reader); |
363 | free(tid_writer); | |
364 | free(count_reader); | |
365 | free(count_writer); | |
366 | return 0; | |
367 | } |