Commit | Line | Data |
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de10a585 MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
22 | ||
de10a585 MD |
23 | #include <stdio.h> |
24 | #include <pthread.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/wait.h> | |
29 | #include <unistd.h> | |
30 | #include <stdio.h> | |
de10a585 MD |
31 | #include <errno.h> |
32 | ||
33 | #include <urcu/arch.h> | |
01477510 | 34 | #include <urcu/assert.h> |
bd252a04 | 35 | #include <urcu/tls-compat.h> |
94df6318 | 36 | #include "thread-id.h" |
2650042a | 37 | #include "../common/debug-yield.h" |
de10a585 MD |
38 | |
39 | /* hardcoded number of CPUs */ | |
40 | #define NR_CPUS 16384 | |
41 | ||
de10a585 MD |
42 | #ifndef DYNAMIC_LINK_TEST |
43 | #define _LGPL_SOURCE | |
de10a585 MD |
44 | #endif |
45 | #include "urcu-qsbr.h" | |
46 | ||
de10a585 MD |
47 | static volatile int test_go, test_stop; |
48 | ||
49 | static unsigned long wdelay; | |
50 | ||
bcc74df3 | 51 | static int *test_rcu_pointer; |
de10a585 MD |
52 | |
53 | static unsigned long duration; | |
54 | ||
55 | /* read-side C.S. duration, in loops */ | |
56 | static unsigned long rduration; | |
57 | ||
58 | /* write-side C.S. duration, in loops */ | |
59 | static unsigned long wduration; | |
60 | ||
ab0aacbe | 61 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 62 | { |
ab0aacbe | 63 | while (loops-- != 0) |
de10a585 MD |
64 | caa_cpu_relax(); |
65 | } | |
66 | ||
67 | static int verbose_mode; | |
68 | ||
69 | #define printf_verbose(fmt, args...) \ | |
70 | do { \ | |
71 | if (verbose_mode) \ | |
72 | printf(fmt, args); \ | |
73 | } while (0) | |
74 | ||
75 | static unsigned int cpu_affinities[NR_CPUS]; | |
76 | static unsigned int next_aff = 0; | |
77 | static int use_affinity = 0; | |
78 | ||
79 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
80 | ||
de10a585 MD |
81 | static void set_affinity(void) |
82 | { | |
2388c075 | 83 | #ifdef HAVE_SCHED_SETAFFINITY |
de10a585 | 84 | cpu_set_t mask; |
95bc7fb9 MD |
85 | int cpu, ret; |
86 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
87 | |
88 | if (!use_affinity) | |
89 | return; | |
90 | ||
2388c075 | 91 | #ifdef HAVE_SCHED_SETAFFINITY |
de10a585 MD |
92 | ret = pthread_mutex_lock(&affinity_mutex); |
93 | if (ret) { | |
94 | perror("Error in pthread mutex lock"); | |
95 | exit(-1); | |
96 | } | |
97 | cpu = cpu_affinities[next_aff++]; | |
98 | ret = pthread_mutex_unlock(&affinity_mutex); | |
99 | if (ret) { | |
100 | perror("Error in pthread mutex unlock"); | |
101 | exit(-1); | |
102 | } | |
103 | CPU_ZERO(&mask); | |
104 | CPU_SET(cpu, &mask); | |
de10a585 | 105 | sched_setaffinity(0, sizeof(mask), &mask); |
de10a585 MD |
106 | #endif /* HAVE_SCHED_SETAFFINITY */ |
107 | } | |
108 | ||
109 | /* | |
110 | * returns 0 if test should end. | |
111 | */ | |
112 | static int test_duration_write(void) | |
113 | { | |
114 | return !test_stop; | |
115 | } | |
116 | ||
117 | static int test_duration_read(void) | |
118 | { | |
119 | return !test_stop; | |
120 | } | |
121 | ||
bd252a04 MD |
122 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
123 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
124 | |
125 | static unsigned int nr_readers; | |
126 | static unsigned int nr_writers; | |
127 | ||
128 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
129 | ||
61c3fb60 | 130 | static |
de10a585 MD |
131 | void *thr_reader(void *_count) |
132 | { | |
133 | unsigned long long *count = _count; | |
bcc74df3 | 134 | int *local_ptr; |
de10a585 | 135 | |
94df6318 MD |
136 | printf_verbose("thread_begin %s, tid %lu\n", |
137 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
138 | |
139 | set_affinity(); | |
140 | ||
141 | rcu_register_thread(); | |
142 | ||
01477510 | 143 | urcu_posix_assert(rcu_read_ongoing()); |
882f3357 | 144 | rcu_thread_offline(); |
01477510 | 145 | urcu_posix_assert(!rcu_read_ongoing()); |
882f3357 MD |
146 | rcu_thread_online(); |
147 | ||
de10a585 MD |
148 | while (!test_go) |
149 | { | |
150 | } | |
151 | cmm_smp_mb(); | |
152 | ||
153 | for (;;) { | |
154 | rcu_read_lock(); | |
01477510 | 155 | urcu_posix_assert(rcu_read_ongoing()); |
de10a585 | 156 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 157 | rcu_debug_yield_read(); |
de10a585 | 158 | if (local_ptr) |
01477510 | 159 | urcu_posix_assert(*local_ptr == 8); |
a0b7f7ea | 160 | if (caa_unlikely(rduration)) |
de10a585 MD |
161 | loop_sleep(rduration); |
162 | rcu_read_unlock(); | |
bd252a04 | 163 | URCU_TLS(nr_reads)++; |
de10a585 | 164 | /* QS each 1024 reads */ |
bd252a04 | 165 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 166 | rcu_quiescent_state(); |
a0b7f7ea | 167 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
168 | break; |
169 | } | |
170 | ||
171 | rcu_unregister_thread(); | |
172 | ||
173 | /* test extra thread registration */ | |
174 | rcu_register_thread(); | |
175 | rcu_unregister_thread(); | |
176 | ||
bd252a04 | 177 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
178 | printf_verbose("thread_end %s, tid %lu\n", |
179 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
180 | return ((void*)1); |
181 | ||
182 | } | |
183 | ||
61c3fb60 | 184 | static |
de10a585 MD |
185 | void *thr_writer(void *_count) |
186 | { | |
187 | unsigned long long *count = _count; | |
bcc74df3 | 188 | int *new, *old; |
de10a585 | 189 | |
94df6318 MD |
190 | printf_verbose("thread_begin %s, tid %lu\n", |
191 | "writer", urcu_get_thread_id()); | |
de10a585 MD |
192 | |
193 | set_affinity(); | |
194 | ||
195 | while (!test_go) | |
196 | { | |
197 | } | |
198 | cmm_smp_mb(); | |
199 | ||
200 | for (;;) { | |
bcc74df3 | 201 | new = malloc(sizeof(int)); |
01477510 | 202 | urcu_posix_assert(new); |
bcc74df3 | 203 | *new = 8; |
de10a585 | 204 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 205 | if (caa_unlikely(wduration)) |
de10a585 MD |
206 | loop_sleep(wduration); |
207 | synchronize_rcu(); | |
de10a585 | 208 | if (old) |
bcc74df3 MD |
209 | *old = 0; |
210 | free(old); | |
bd252a04 | 211 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 212 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 213 | break; |
a0b7f7ea | 214 | if (caa_unlikely(wdelay)) |
de10a585 MD |
215 | loop_sleep(wdelay); |
216 | } | |
217 | ||
94df6318 MD |
218 | printf_verbose("thread_end %s, tid %lu\n", |
219 | "writer", urcu_get_thread_id()); | |
bd252a04 | 220 | *count = URCU_TLS(nr_writes); |
de10a585 MD |
221 | return ((void*)2); |
222 | } | |
223 | ||
61c3fb60 | 224 | static |
70469b43 | 225 | void show_usage(char **argv) |
de10a585 | 226 | { |
06637138 MD |
227 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
228 | argv[0]); | |
229 | printf("OPTIONS:\n"); | |
06637138 | 230 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
231 | printf(" [-d delay] (writer period (us))\n"); |
232 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
233 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
234 | printf(" [-v] (verbose output)\n"); | |
235 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
de10a585 MD |
236 | printf("\n"); |
237 | } | |
238 | ||
239 | int main(int argc, char **argv) | |
240 | { | |
241 | int err; | |
242 | pthread_t *tid_reader, *tid_writer; | |
243 | void *tret; | |
244 | unsigned long long *count_reader, *count_writer; | |
245 | unsigned long long tot_reads = 0, tot_writes = 0; | |
246 | int i, a; | |
83e334d0 | 247 | unsigned int i_thr; |
de10a585 MD |
248 | |
249 | if (argc < 4) { | |
70469b43 | 250 | show_usage(argv); |
de10a585 MD |
251 | return -1; |
252 | } | |
253 | ||
254 | err = sscanf(argv[1], "%u", &nr_readers); | |
255 | if (err != 1) { | |
70469b43 | 256 | show_usage(argv); |
de10a585 MD |
257 | return -1; |
258 | } | |
259 | ||
260 | err = sscanf(argv[2], "%u", &nr_writers); | |
261 | if (err != 1) { | |
70469b43 | 262 | show_usage(argv); |
de10a585 MD |
263 | return -1; |
264 | } | |
83e334d0 | 265 | |
de10a585 MD |
266 | err = sscanf(argv[3], "%lu", &duration); |
267 | if (err != 1) { | |
70469b43 | 268 | show_usage(argv); |
de10a585 MD |
269 | return -1; |
270 | } | |
271 | ||
272 | for (i = 4; i < argc; i++) { | |
273 | if (argv[i][0] != '-') | |
274 | continue; | |
275 | switch (argv[i][1]) { | |
de10a585 | 276 | case 'r': |
2650042a | 277 | rcu_debug_yield_enable(RCU_YIELD_READ); |
de10a585 MD |
278 | break; |
279 | case 'w': | |
2650042a | 280 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
de10a585 | 281 | break; |
de10a585 MD |
282 | case 'a': |
283 | if (argc < i + 2) { | |
70469b43 | 284 | show_usage(argv); |
de10a585 MD |
285 | return -1; |
286 | } | |
287 | a = atoi(argv[++i]); | |
288 | cpu_affinities[next_aff++] = a; | |
289 | use_affinity = 1; | |
290 | printf_verbose("Adding CPU %d affinity\n", a); | |
291 | break; | |
292 | case 'c': | |
293 | if (argc < i + 2) { | |
70469b43 | 294 | show_usage(argv); |
de10a585 MD |
295 | return -1; |
296 | } | |
297 | rduration = atol(argv[++i]); | |
298 | break; | |
299 | case 'd': | |
300 | if (argc < i + 2) { | |
70469b43 | 301 | show_usage(argv); |
de10a585 MD |
302 | return -1; |
303 | } | |
304 | wdelay = atol(argv[++i]); | |
305 | break; | |
306 | case 'e': | |
307 | if (argc < i + 2) { | |
70469b43 | 308 | show_usage(argv); |
de10a585 MD |
309 | return -1; |
310 | } | |
311 | wduration = atol(argv[++i]); | |
312 | break; | |
313 | case 'v': | |
314 | verbose_mode = 1; | |
315 | break; | |
316 | } | |
317 | } | |
318 | ||
319 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
320 | duration, nr_readers, nr_writers); | |
321 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
322 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
323 | printf_verbose("thread %-6s, tid %lu\n", |
324 | "main", urcu_get_thread_id()); | |
de10a585 | 325 | |
9aa14175 MD |
326 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
327 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
328 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
329 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
de10a585 MD |
330 | |
331 | next_aff = 0; | |
332 | ||
83e334d0 MJ |
333 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
334 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
335 | &count_reader[i_thr]); | |
de10a585 MD |
336 | if (err != 0) |
337 | exit(1); | |
338 | } | |
83e334d0 MJ |
339 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
340 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
341 | &count_writer[i_thr]); | |
de10a585 MD |
342 | if (err != 0) |
343 | exit(1); | |
344 | } | |
345 | ||
346 | cmm_smp_mb(); | |
347 | ||
348 | test_go = 1; | |
349 | ||
350 | sleep(duration); | |
351 | ||
352 | test_stop = 1; | |
353 | ||
83e334d0 MJ |
354 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
355 | err = pthread_join(tid_reader[i_thr], &tret); | |
de10a585 MD |
356 | if (err != 0) |
357 | exit(1); | |
83e334d0 | 358 | tot_reads += count_reader[i_thr]; |
de10a585 | 359 | } |
83e334d0 MJ |
360 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
361 | err = pthread_join(tid_writer[i_thr], &tret); | |
de10a585 MD |
362 | if (err != 0) |
363 | exit(1); | |
83e334d0 | 364 | tot_writes += count_writer[i_thr]; |
de10a585 | 365 | } |
83e334d0 | 366 | |
de10a585 MD |
367 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
368 | tot_writes); | |
369 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
370 | "nr_writers %3u " | |
371 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
372 | argv[0], duration, nr_readers, rduration, wduration, | |
373 | nr_writers, wdelay, tot_reads, tot_writes, | |
374 | tot_reads + tot_writes); | |
bcc74df3 | 375 | free(test_rcu_pointer); |
de10a585 MD |
376 | free(tid_reader); |
377 | free(tid_writer); | |
378 | free(count_reader); | |
379 | free(count_writer); | |
380 | return 0; | |
381 | } |