Commit | Line | Data |
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0ee8bb0a MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6982d6d7 | 6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
0ee8bb0a MD |
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 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
d8540fc5 | 24 | #include "../config.h" |
0ee8bb0a MD |
25 | #include <stdio.h> |
26 | #include <pthread.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | #include <unistd.h> | |
32 | #include <stdio.h> | |
33 | #include <assert.h> | |
34 | #include <sys/syscall.h> | |
9e97e478 | 35 | #include <sched.h> |
94b343fd | 36 | #include <errno.h> |
0ee8bb0a | 37 | |
ec4e58a3 | 38 | #include <urcu/arch.h> |
0ee8bb0a | 39 | |
2a7ac59d MD |
40 | /* hardcoded number of CPUs */ |
41 | #define NR_CPUS 16384 | |
42 | ||
0ee8bb0a MD |
43 | #if defined(_syscall0) |
44 | _syscall0(pid_t, gettid) | |
45 | #elif defined(__NR_gettid) | |
46 | static inline pid_t gettid(void) | |
47 | { | |
48 | return syscall(__NR_gettid); | |
49 | } | |
50 | #else | |
51 | #warning "use pid as tid" | |
52 | static inline pid_t gettid(void) | |
53 | { | |
54 | return getpid(); | |
55 | } | |
56 | #endif | |
57 | ||
58 | #ifndef DYNAMIC_LINK_TEST | |
59 | #define _LGPL_SOURCE | |
60 | #else | |
61 | #define debug_yield_read() | |
62 | #endif | |
ec4e58a3 | 63 | #include <urcu.h> |
0ee8bb0a MD |
64 | |
65 | struct test_array { | |
66 | int a; | |
67 | }; | |
68 | ||
69 | struct per_thread_lock { | |
70 | pthread_mutex_t lock; | |
06f22bdb | 71 | } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */ |
0ee8bb0a MD |
72 | |
73 | static struct per_thread_lock *per_thread_lock; | |
74 | ||
78efb485 | 75 | static volatile int test_go, test_stop; |
0ee8bb0a | 76 | |
9e31d0f0 | 77 | static unsigned long wdelay; |
0ee8bb0a | 78 | |
2b4e4125 | 79 | static volatile struct test_array test_array = { 8 }; |
0ee8bb0a MD |
80 | |
81 | static unsigned long duration; | |
0ee8bb0a | 82 | |
daddf5b0 | 83 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
84 | static unsigned long rduration; |
85 | ||
31b598e0 MD |
86 | /* write-side C.S. duration, in loops */ |
87 | static unsigned long wduration; | |
88 | ||
daddf5b0 MD |
89 | static inline void loop_sleep(unsigned long l) |
90 | { | |
91 | while(l-- != 0) | |
06f22bdb | 92 | caa_cpu_relax(); |
daddf5b0 MD |
93 | } |
94 | ||
4bad7d45 MD |
95 | static int verbose_mode; |
96 | ||
97 | #define printf_verbose(fmt, args...) \ | |
98 | do { \ | |
99 | if (verbose_mode) \ | |
100 | printf(fmt, args); \ | |
101 | } while (0) | |
102 | ||
2a7ac59d MD |
103 | static unsigned int cpu_affinities[NR_CPUS]; |
104 | static unsigned int next_aff = 0; | |
105 | static int use_affinity = 0; | |
106 | ||
6af882ba MD |
107 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
108 | ||
d8540fc5 PA |
109 | #ifndef HAVE_CPU_SET_T |
110 | typedef unsigned long cpu_set_t; | |
111 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
112 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
113 | #endif | |
114 | ||
2a7ac59d MD |
115 | static void set_affinity(void) |
116 | { | |
117 | cpu_set_t mask; | |
118 | int cpu; | |
6af882ba | 119 | int ret; |
2a7ac59d MD |
120 | |
121 | if (!use_affinity) | |
122 | return; | |
123 | ||
d8540fc5 | 124 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
125 | ret = pthread_mutex_lock(&affinity_mutex); |
126 | if (ret) { | |
127 | perror("Error in pthread mutex lock"); | |
128 | exit(-1); | |
129 | } | |
2a7ac59d | 130 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
131 | ret = pthread_mutex_unlock(&affinity_mutex); |
132 | if (ret) { | |
133 | perror("Error in pthread mutex unlock"); | |
134 | exit(-1); | |
135 | } | |
2a7ac59d MD |
136 | CPU_ZERO(&mask); |
137 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
138 | #if SCHED_SETAFFINITY_ARGS == 2 |
139 | sched_setaffinity(0, &mask); | |
140 | #else | |
2a7ac59d | 141 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
142 | #endif |
143 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
144 | } |
145 | ||
0ee8bb0a MD |
146 | /* |
147 | * returns 0 if test should end. | |
148 | */ | |
149 | static int test_duration_write(void) | |
150 | { | |
78efb485 | 151 | return !test_stop; |
0ee8bb0a MD |
152 | } |
153 | ||
154 | static int test_duration_read(void) | |
155 | { | |
78efb485 | 156 | return !test_stop; |
0ee8bb0a MD |
157 | } |
158 | ||
159 | static unsigned long long __thread nr_writes; | |
160 | static unsigned long long __thread nr_reads; | |
161 | ||
55271c13 | 162 | static |
06f22bdb | 163 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 164 | static |
06f22bdb | 165 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
166 | |
167 | static unsigned int nr_readers; | |
168 | static unsigned int nr_writers; | |
169 | ||
170 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
171 | ||
172 | void rcu_copy_mutex_lock(void) | |
173 | { | |
174 | int ret; | |
175 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
176 | if (ret) { | |
177 | perror("Error in pthread mutex lock"); | |
178 | exit(-1); | |
179 | } | |
180 | } | |
181 | ||
182 | void rcu_copy_mutex_unlock(void) | |
183 | { | |
184 | int ret; | |
185 | ||
186 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
187 | if (ret) { | |
188 | perror("Error in pthread mutex unlock"); | |
189 | exit(-1); | |
190 | } | |
191 | } | |
192 | ||
193 | void *thr_reader(void *data) | |
194 | { | |
195 | unsigned long tidx = (unsigned long)data; | |
196 | ||
4bad7d45 | 197 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
0ee8bb0a MD |
198 | "reader", pthread_self(), (unsigned long)gettid()); |
199 | ||
2a7ac59d MD |
200 | set_affinity(); |
201 | ||
0ee8bb0a MD |
202 | while (!test_go) |
203 | { | |
204 | } | |
205 | ||
206 | for (;;) { | |
207 | pthread_mutex_lock(&per_thread_lock[tidx].lock); | |
208 | assert(test_array.a == 8); | |
8b632bab | 209 | if (unlikely(rduration)) |
daddf5b0 | 210 | loop_sleep(rduration); |
0ee8bb0a MD |
211 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
212 | nr_reads++; | |
59d5a406 | 213 | if (unlikely(!test_duration_read())) |
0ee8bb0a MD |
214 | break; |
215 | } | |
216 | ||
217 | tot_nr_reads[tidx] = nr_reads; | |
cda3c71d | 218 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
0ee8bb0a MD |
219 | "reader", pthread_self(), (unsigned long)gettid()); |
220 | return ((void*)1); | |
221 | ||
222 | } | |
223 | ||
224 | void *thr_writer(void *data) | |
225 | { | |
226 | unsigned long wtidx = (unsigned long)data; | |
227 | long tidx; | |
228 | ||
4bad7d45 | 229 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
0ee8bb0a MD |
230 | "writer", pthread_self(), (unsigned long)gettid()); |
231 | ||
2a7ac59d MD |
232 | set_affinity(); |
233 | ||
0ee8bb0a MD |
234 | while (!test_go) |
235 | { | |
236 | } | |
5481ddb3 | 237 | cmm_smp_mb(); |
0ee8bb0a MD |
238 | |
239 | for (;;) { | |
240 | for (tidx = 0; tidx < nr_readers; tidx++) { | |
241 | pthread_mutex_lock(&per_thread_lock[tidx].lock); | |
242 | } | |
2b4e4125 | 243 | test_array.a = 0; |
0ee8bb0a | 244 | test_array.a = 8; |
31b598e0 MD |
245 | if (unlikely(wduration)) |
246 | loop_sleep(wduration); | |
f120cc10 | 247 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
0ee8bb0a MD |
248 | pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
249 | } | |
250 | nr_writes++; | |
59d5a406 | 251 | if (unlikely(!test_duration_write())) |
0ee8bb0a | 252 | break; |
59d5a406 | 253 | if (unlikely(wdelay)) |
9e31d0f0 | 254 | loop_sleep(wdelay); |
0ee8bb0a MD |
255 | } |
256 | ||
4bad7d45 | 257 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
0ee8bb0a MD |
258 | "writer", pthread_self(), (unsigned long)gettid()); |
259 | tot_nr_writes[wtidx] = nr_writes; | |
260 | return ((void*)2); | |
261 | } | |
262 | ||
263 | void show_usage(int argc, char **argv) | |
264 | { | |
265 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
266 | #ifdef DEBUG_YIELD | |
267 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
268 | #endif | |
269 | printf(" [-d delay] (writer period (us))"); | |
daddf5b0 | 270 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 271 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 272 | printf(" [-v] (verbose output)"); |
9e97e478 | 273 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
0ee8bb0a MD |
274 | printf("\n"); |
275 | } | |
276 | ||
277 | int main(int argc, char **argv) | |
278 | { | |
279 | int err; | |
280 | pthread_t *tid_reader, *tid_writer; | |
281 | void *tret; | |
282 | unsigned long long *count_reader, *count_writer; | |
283 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 284 | int i, a; |
0ee8bb0a MD |
285 | |
286 | if (argc < 4) { | |
287 | show_usage(argc, argv); | |
288 | return -1; | |
289 | } | |
5481ddb3 | 290 | cmm_smp_mb(); |
0ee8bb0a MD |
291 | |
292 | err = sscanf(argv[1], "%u", &nr_readers); | |
293 | if (err != 1) { | |
294 | show_usage(argc, argv); | |
295 | return -1; | |
296 | } | |
297 | ||
298 | err = sscanf(argv[2], "%u", &nr_writers); | |
299 | if (err != 1) { | |
300 | show_usage(argc, argv); | |
301 | return -1; | |
302 | } | |
303 | ||
304 | err = sscanf(argv[3], "%lu", &duration); | |
305 | if (err != 1) { | |
306 | show_usage(argc, argv); | |
307 | return -1; | |
308 | } | |
309 | ||
310 | for (i = 4; i < argc; i++) { | |
311 | if (argv[i][0] != '-') | |
312 | continue; | |
313 | switch (argv[i][1]) { | |
314 | #ifdef DEBUG_YIELD | |
315 | case 'r': | |
316 | yield_active |= YIELD_READ; | |
317 | break; | |
318 | case 'w': | |
319 | yield_active |= YIELD_WRITE; | |
320 | break; | |
321 | #endif | |
9e97e478 MD |
322 | case 'a': |
323 | if (argc < i + 2) { | |
324 | show_usage(argc, argv); | |
325 | return -1; | |
326 | } | |
327 | a = atoi(argv[++i]); | |
2a7ac59d | 328 | cpu_affinities[next_aff++] = a; |
9e97e478 | 329 | use_affinity = 1; |
4bad7d45 | 330 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 331 | break; |
8b632bab MD |
332 | case 'c': |
333 | if (argc < i + 2) { | |
334 | show_usage(argc, argv); | |
335 | return -1; | |
336 | } | |
9e31d0f0 | 337 | rduration = atol(argv[++i]); |
8b632bab | 338 | break; |
0ee8bb0a MD |
339 | case 'd': |
340 | if (argc < i + 2) { | |
341 | show_usage(argc, argv); | |
342 | return -1; | |
343 | } | |
9e31d0f0 | 344 | wdelay = atol(argv[++i]); |
0ee8bb0a | 345 | break; |
31b598e0 MD |
346 | case 'e': |
347 | if (argc < i + 2) { | |
348 | show_usage(argc, argv); | |
349 | return -1; | |
350 | } | |
351 | wduration = atol(argv[++i]); | |
352 | break; | |
4bad7d45 MD |
353 | case 'v': |
354 | verbose_mode = 1; | |
355 | break; | |
0ee8bb0a MD |
356 | } |
357 | } | |
358 | ||
4bad7d45 | 359 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 360 | duration, nr_readers, nr_writers); |
9e31d0f0 | 361 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
362 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
363 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
0ee8bb0a MD |
364 | "main", pthread_self(), (unsigned long)gettid()); |
365 | ||
366 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
367 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
368 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
369 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
370 | tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers); | |
371 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
372 | per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers); | |
373 | ||
2a7ac59d MD |
374 | next_aff = 0; |
375 | ||
0ee8bb0a MD |
376 | for (i = 0; i < nr_readers; i++) { |
377 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
378 | (void *)(long)i); | |
379 | if (err != 0) | |
380 | exit(1); | |
381 | } | |
382 | for (i = 0; i < nr_writers; i++) { | |
383 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
384 | (void *)(long)i); | |
385 | if (err != 0) | |
386 | exit(1); | |
387 | } | |
388 | ||
5481ddb3 | 389 | cmm_smp_mb(); |
0ee8bb0a | 390 | |
78efb485 MD |
391 | test_go = 1; |
392 | ||
393 | sleep(duration); | |
394 | ||
395 | test_stop = 1; | |
396 | ||
0ee8bb0a MD |
397 | for (i = 0; i < nr_readers; i++) { |
398 | err = pthread_join(tid_reader[i], &tret); | |
399 | if (err != 0) | |
400 | exit(1); | |
401 | tot_reads += tot_nr_reads[i]; | |
402 | } | |
403 | for (i = 0; i < nr_writers; i++) { | |
404 | err = pthread_join(tid_writer[i], &tret); | |
405 | if (err != 0) | |
406 | exit(1); | |
407 | tot_writes += tot_nr_writes[i]; | |
408 | } | |
4bad7d45 MD |
409 | |
410 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 411 | tot_writes); |
a50a7b43 | 412 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 413 | "nr_writers %3u " |
9e31d0f0 | 414 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 415 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
416 | nr_writers, wdelay, tot_reads, tot_writes, |
417 | tot_reads + tot_writes); | |
418 | ||
0ee8bb0a MD |
419 | free(tid_reader); |
420 | free(tid_writer); | |
421 | free(count_reader); | |
422 | free(count_writer); | |
423 | free(tot_nr_reads); | |
424 | free(tot_nr_writes); | |
425 | free(per_thread_lock); | |
426 | return 0; | |
427 | } |