Commit | Line | Data |
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90075a50 | 1 | /* |
786ee85b | 2 | * test_urcu_defer.c |
90075a50 MD |
3 | * |
4 | * Userspace RCU library - test program (with automatic reclamation) | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
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 | ||
23 | #define _GNU_SOURCE | |
d8540fc5 | 24 | #include "../config.h" |
90075a50 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> | |
35 | #include <sched.h> | |
94b343fd | 36 | #include <errno.h> |
90075a50 | 37 | |
ec4e58a3 | 38 | #include <urcu/arch.h> |
90075a50 | 39 | |
90075a50 MD |
40 | /* hardcoded number of CPUs */ |
41 | #define NR_CPUS 16384 | |
42 | ||
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 MD |
63 | #include <urcu.h> |
64 | #include <urcu-defer.h> | |
90075a50 MD |
65 | |
66 | struct test_array { | |
67 | int a; | |
68 | }; | |
69 | ||
70 | static volatile int test_go, test_stop; | |
71 | ||
72 | static unsigned long wdelay; | |
73 | ||
74 | static struct test_array *test_rcu_pointer; | |
75 | ||
76 | static unsigned long duration; | |
77 | ||
78 | /* read-side C.S. duration, in loops */ | |
79 | static unsigned long rduration; | |
80 | ||
31b598e0 MD |
81 | /* write-side C.S. duration, in loops */ |
82 | static unsigned long wduration; | |
83 | ||
90075a50 MD |
84 | static inline void loop_sleep(unsigned long l) |
85 | { | |
86 | while(l-- != 0) | |
87 | cpu_relax(); | |
88 | } | |
89 | ||
90 | static int verbose_mode; | |
91 | ||
92 | #define printf_verbose(fmt, args...) \ | |
93 | do { \ | |
94 | if (verbose_mode) \ | |
95 | printf(fmt, args); \ | |
96 | } while (0) | |
97 | ||
98 | static unsigned int cpu_affinities[NR_CPUS]; | |
99 | static unsigned int next_aff = 0; | |
100 | static int use_affinity = 0; | |
101 | ||
102 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
103 | ||
d8540fc5 PA |
104 | #ifndef HAVE_CPU_SET_T |
105 | typedef unsigned long cpu_set_t; | |
106 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
107 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
108 | #endif | |
109 | ||
90075a50 MD |
110 | static void set_affinity(void) |
111 | { | |
112 | cpu_set_t mask; | |
113 | int cpu; | |
114 | int ret; | |
115 | ||
116 | if (!use_affinity) | |
117 | return; | |
118 | ||
d8540fc5 | 119 | #if HAVE_SCHED_SETAFFINITY |
90075a50 MD |
120 | ret = pthread_mutex_lock(&affinity_mutex); |
121 | if (ret) { | |
122 | perror("Error in pthread mutex lock"); | |
123 | exit(-1); | |
124 | } | |
125 | cpu = cpu_affinities[next_aff++]; | |
126 | ret = pthread_mutex_unlock(&affinity_mutex); | |
127 | if (ret) { | |
128 | perror("Error in pthread mutex unlock"); | |
129 | exit(-1); | |
130 | } | |
d8540fc5 | 131 | |
90075a50 MD |
132 | CPU_ZERO(&mask); |
133 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
134 | #if SCHED_SETAFFINITY_ARGS == 2 |
135 | sched_setaffinity(0, &mask); | |
136 | #else | |
90075a50 | 137 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
138 | #endif |
139 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
90075a50 MD |
140 | } |
141 | ||
142 | /* | |
143 | * returns 0 if test should end. | |
144 | */ | |
145 | static int test_duration_write(void) | |
146 | { | |
147 | return !test_stop; | |
148 | } | |
149 | ||
150 | static int test_duration_read(void) | |
151 | { | |
152 | return !test_stop; | |
153 | } | |
154 | ||
155 | static unsigned long long __thread nr_writes; | |
156 | static unsigned long long __thread nr_reads; | |
157 | ||
158 | static | |
159 | unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes; | |
160 | ||
161 | static unsigned int nr_readers; | |
162 | static unsigned int nr_writers; | |
163 | ||
164 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
165 | ||
166 | void rcu_copy_mutex_lock(void) | |
167 | { | |
168 | int ret; | |
169 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
170 | if (ret) { | |
171 | perror("Error in pthread mutex lock"); | |
172 | exit(-1); | |
173 | } | |
174 | } | |
175 | ||
176 | void rcu_copy_mutex_unlock(void) | |
177 | { | |
178 | int ret; | |
179 | ||
180 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
181 | if (ret) { | |
182 | perror("Error in pthread mutex unlock"); | |
183 | exit(-1); | |
184 | } | |
185 | } | |
186 | ||
187 | void *thr_reader(void *_count) | |
188 | { | |
189 | unsigned long long *count = _count; | |
190 | struct test_array *local_ptr; | |
191 | ||
192 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", | |
193 | "reader", pthread_self(), (unsigned long)gettid()); | |
194 | ||
195 | set_affinity(); | |
196 | ||
197 | rcu_register_thread(); | |
198 | ||
199 | while (!test_go) | |
200 | { | |
201 | } | |
202 | smp_mb(); | |
203 | ||
204 | for (;;) { | |
205 | rcu_read_lock(); | |
206 | local_ptr = rcu_dereference(test_rcu_pointer); | |
207 | debug_yield_read(); | |
208 | if (local_ptr) | |
209 | assert(local_ptr->a == 8); | |
210 | if (unlikely(rduration)) | |
211 | loop_sleep(rduration); | |
212 | rcu_read_unlock(); | |
213 | nr_reads++; | |
214 | if (unlikely(!test_duration_read())) | |
215 | break; | |
216 | } | |
217 | ||
218 | rcu_unregister_thread(); | |
219 | ||
220 | *count = nr_reads; | |
221 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", | |
222 | "reader", pthread_self(), (unsigned long)gettid()); | |
223 | return ((void*)1); | |
224 | ||
225 | } | |
226 | ||
804b4375 MD |
227 | static void test_cb2(void *data) |
228 | { | |
229 | } | |
230 | ||
231 | static void test_cb1(void *data) | |
232 | { | |
233 | } | |
234 | ||
90075a50 MD |
235 | void *thr_writer(void *data) |
236 | { | |
237 | unsigned long wtidx = (unsigned long)data; | |
238 | struct test_array *new, *old = NULL; | |
239 | ||
240 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", | |
241 | "writer", pthread_self(), (unsigned long)gettid()); | |
242 | ||
243 | set_affinity(); | |
244 | ||
786ee85b | 245 | rcu_defer_register_thread(); |
90075a50 MD |
246 | |
247 | while (!test_go) | |
248 | { | |
249 | } | |
250 | smp_mb(); | |
251 | ||
252 | for (;;) { | |
253 | new = malloc(sizeof(*new)); | |
254 | new->a = 8; | |
255 | old = rcu_xchg_pointer(&test_rcu_pointer, new); | |
31b598e0 MD |
256 | if (unlikely(wduration)) |
257 | loop_sleep(wduration); | |
b4f313b7 MD |
258 | defer_rcu(free, old); |
259 | defer_rcu(test_cb1, old); | |
260 | defer_rcu(test_cb1, (void *)-2L); | |
261 | defer_rcu(test_cb1, (void *)-2L); | |
262 | defer_rcu(test_cb1, old); | |
263 | defer_rcu(test_cb2, (void *)-2L); | |
264 | defer_rcu(test_cb2, (void *)-4L); | |
265 | defer_rcu(test_cb2, (void *)-2L); | |
90075a50 MD |
266 | nr_writes++; |
267 | if (unlikely(!test_duration_write())) | |
268 | break; | |
269 | if (unlikely(wdelay)) | |
270 | loop_sleep(wdelay); | |
271 | } | |
272 | ||
786ee85b | 273 | rcu_defer_unregister_thread(); |
90075a50 MD |
274 | |
275 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", | |
276 | "writer", pthread_self(), (unsigned long)gettid()); | |
277 | tot_nr_writes[wtidx] = nr_writes; | |
278 | return ((void*)2); | |
279 | } | |
280 | ||
281 | void show_usage(int argc, char **argv) | |
282 | { | |
283 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
284 | #ifdef DEBUG_YIELD | |
285 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
286 | #endif | |
287 | printf(" [-d delay] (writer period (us))"); | |
288 | printf(" [-c duration] (reader C.S. duration (in loops))"); | |
31b598e0 | 289 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
90075a50 MD |
290 | printf(" [-v] (verbose output)"); |
291 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); | |
292 | printf("\n"); | |
293 | } | |
294 | ||
295 | int main(int argc, char **argv) | |
296 | { | |
297 | int err; | |
298 | pthread_t *tid_reader, *tid_writer; | |
299 | void *tret; | |
300 | unsigned long long *count_reader; | |
301 | unsigned long long tot_reads = 0, tot_writes = 0; | |
302 | int i, a; | |
303 | ||
304 | if (argc < 4) { | |
305 | show_usage(argc, argv); | |
306 | return -1; | |
307 | } | |
308 | ||
309 | err = sscanf(argv[1], "%u", &nr_readers); | |
310 | if (err != 1) { | |
311 | show_usage(argc, argv); | |
312 | return -1; | |
313 | } | |
314 | ||
315 | err = sscanf(argv[2], "%u", &nr_writers); | |
316 | if (err != 1) { | |
317 | show_usage(argc, argv); | |
318 | return -1; | |
319 | } | |
320 | ||
321 | err = sscanf(argv[3], "%lu", &duration); | |
322 | if (err != 1) { | |
323 | show_usage(argc, argv); | |
324 | return -1; | |
325 | } | |
326 | ||
327 | for (i = 4; i < argc; i++) { | |
328 | if (argv[i][0] != '-') | |
329 | continue; | |
330 | switch (argv[i][1]) { | |
331 | #ifdef DEBUG_YIELD | |
332 | case 'r': | |
333 | yield_active |= YIELD_READ; | |
334 | break; | |
335 | case 'w': | |
336 | yield_active |= YIELD_WRITE; | |
337 | break; | |
338 | #endif | |
339 | case 'a': | |
340 | if (argc < i + 2) { | |
341 | show_usage(argc, argv); | |
342 | return -1; | |
343 | } | |
344 | a = atoi(argv[++i]); | |
345 | cpu_affinities[next_aff++] = a; | |
346 | use_affinity = 1; | |
347 | printf_verbose("Adding CPU %d affinity\n", a); | |
348 | break; | |
349 | case 'c': | |
350 | if (argc < i + 2) { | |
351 | show_usage(argc, argv); | |
352 | return -1; | |
353 | } | |
354 | rduration = atol(argv[++i]); | |
355 | break; | |
356 | case 'd': | |
357 | if (argc < i + 2) { | |
358 | show_usage(argc, argv); | |
359 | return -1; | |
360 | } | |
361 | wdelay = atol(argv[++i]); | |
362 | break; | |
31b598e0 MD |
363 | case 'e': |
364 | if (argc < i + 2) { | |
365 | show_usage(argc, argv); | |
366 | return -1; | |
367 | } | |
368 | wduration = atol(argv[++i]); | |
369 | break; | |
90075a50 MD |
370 | case 'v': |
371 | verbose_mode = 1; | |
372 | break; | |
373 | } | |
374 | } | |
375 | ||
376 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
377 | duration, nr_readers, nr_writers); | |
378 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
379 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
380 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
381 | "main", pthread_self(), (unsigned long)gettid()); | |
382 | ||
383 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
384 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
385 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
386 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
387 | ||
388 | next_aff = 0; | |
389 | ||
390 | for (i = 0; i < nr_readers; i++) { | |
391 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
392 | &count_reader[i]); | |
393 | if (err != 0) | |
394 | exit(1); | |
395 | } | |
396 | for (i = 0; i < nr_writers; i++) { | |
397 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
398 | (void *)(long)i); | |
399 | if (err != 0) | |
400 | exit(1); | |
401 | } | |
402 | ||
403 | smp_mb(); | |
404 | ||
405 | test_go = 1; | |
406 | ||
407 | sleep(duration); | |
408 | ||
409 | test_stop = 1; | |
410 | ||
411 | for (i = 0; i < nr_readers; i++) { | |
412 | err = pthread_join(tid_reader[i], &tret); | |
413 | if (err != 0) | |
414 | exit(1); | |
415 | tot_reads += count_reader[i]; | |
416 | } | |
417 | for (i = 0; i < nr_writers; i++) { | |
418 | err = pthread_join(tid_writer[i], &tret); | |
419 | if (err != 0) | |
420 | exit(1); | |
421 | tot_writes += tot_nr_writes[i]; | |
422 | } | |
423 | ||
424 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
425 | tot_writes); | |
a50a7b43 | 426 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
90075a50 MD |
427 | "nr_writers %3u " |
428 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 429 | argv[0], duration, nr_readers, rduration, wduration, |
90075a50 MD |
430 | nr_writers, wdelay, tot_reads, tot_writes, |
431 | tot_reads + tot_writes); | |
432 | free(tid_reader); | |
433 | free(tid_writer); | |
434 | free(count_reader); | |
435 | free(tot_nr_writes); | |
436 | ||
437 | return 0; | |
438 | } |