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10c48e14 MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
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 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
10c48e14 MD |
24 | #include <stdio.h> |
25 | #include <pthread.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/wait.h> | |
30 | #include <unistd.h> | |
31 | #include <stdio.h> | |
32 | #include <assert.h> | |
33 | #include <sys/syscall.h> | |
9e97e478 | 34 | #include <sched.h> |
10c48e14 | 35 | |
7685d963 MD |
36 | #include "arch.h" |
37 | ||
10c48e14 MD |
38 | #if defined(_syscall0) |
39 | _syscall0(pid_t, gettid) | |
40 | #elif defined(__NR_gettid) | |
41 | static inline pid_t gettid(void) | |
42 | { | |
43 | return syscall(__NR_gettid); | |
44 | } | |
45 | #else | |
46 | #warning "use pid as tid" | |
47 | static inline pid_t gettid(void) | |
48 | { | |
49 | return getpid(); | |
50 | } | |
51 | #endif | |
52 | ||
53 | #ifndef DYNAMIC_LINK_TEST | |
54 | #define _LGPL_SOURCE | |
55 | #else | |
56 | #define debug_yield_read() | |
57 | #endif | |
58 | #include "urcu.h" | |
59 | ||
60 | struct test_array { | |
61 | int a; | |
62 | }; | |
63 | ||
64 | pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; | |
65 | ||
78efb485 | 66 | static volatile int test_go, test_stop; |
10c48e14 | 67 | |
9e31d0f0 | 68 | static unsigned long wdelay; |
10c48e14 | 69 | |
2b4e4125 | 70 | static volatile struct test_array test_array = { 8 }; |
10c48e14 MD |
71 | |
72 | static unsigned long duration; | |
10c48e14 | 73 | |
daddf5b0 | 74 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
75 | static unsigned long rduration; |
76 | ||
daddf5b0 MD |
77 | static inline void loop_sleep(unsigned long l) |
78 | { | |
79 | while(l-- != 0) | |
80 | cpu_relax(); | |
81 | } | |
82 | ||
4bad7d45 MD |
83 | static int verbose_mode; |
84 | ||
85 | #define printf_verbose(fmt, args...) \ | |
86 | do { \ | |
87 | if (verbose_mode) \ | |
88 | printf(fmt, args); \ | |
89 | } while (0) | |
90 | ||
10c48e14 MD |
91 | /* |
92 | * returns 0 if test should end. | |
93 | */ | |
94 | static int test_duration_write(void) | |
95 | { | |
78efb485 | 96 | return !test_stop; |
10c48e14 MD |
97 | } |
98 | ||
99 | static int test_duration_read(void) | |
100 | { | |
78efb485 | 101 | return !test_stop; |
10c48e14 MD |
102 | } |
103 | ||
104 | static unsigned long long __thread nr_writes; | |
105 | static unsigned long long __thread nr_reads; | |
106 | ||
107 | static unsigned int nr_readers; | |
108 | static unsigned int nr_writers; | |
109 | ||
110 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
111 | ||
112 | void rcu_copy_mutex_lock(void) | |
113 | { | |
114 | int ret; | |
115 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
116 | if (ret) { | |
117 | perror("Error in pthread mutex lock"); | |
118 | exit(-1); | |
119 | } | |
120 | } | |
121 | ||
122 | void rcu_copy_mutex_unlock(void) | |
123 | { | |
124 | int ret; | |
125 | ||
126 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
127 | if (ret) { | |
128 | perror("Error in pthread mutex unlock"); | |
129 | exit(-1); | |
130 | } | |
131 | } | |
132 | ||
133 | void *thr_reader(void *_count) | |
134 | { | |
135 | unsigned long long *count = _count; | |
136 | ||
4bad7d45 | 137 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
138 | "reader", pthread_self(), (unsigned long)gettid()); |
139 | ||
140 | while (!test_go) | |
141 | { | |
142 | } | |
143 | ||
144 | for (;;) { | |
145 | pthread_rwlock_rdlock(&lock); | |
146 | assert(test_array.a == 8); | |
8b632bab | 147 | if (unlikely(rduration)) |
daddf5b0 | 148 | loop_sleep(rduration); |
10c48e14 MD |
149 | pthread_rwlock_unlock(&lock); |
150 | nr_reads++; | |
59d5a406 | 151 | if (unlikely(!test_duration_read())) |
10c48e14 MD |
152 | break; |
153 | } | |
154 | ||
155 | *count = nr_reads; | |
4bad7d45 | 156 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
157 | "reader", pthread_self(), (unsigned long)gettid()); |
158 | return ((void*)1); | |
159 | ||
160 | } | |
161 | ||
162 | void *thr_writer(void *_count) | |
163 | { | |
164 | unsigned long long *count = _count; | |
165 | ||
4bad7d45 | 166 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
167 | "writer", pthread_self(), (unsigned long)gettid()); |
168 | ||
169 | while (!test_go) | |
170 | { | |
171 | } | |
7685d963 | 172 | smp_mb(); |
10c48e14 MD |
173 | |
174 | for (;;) { | |
175 | pthread_rwlock_wrlock(&lock); | |
2b4e4125 | 176 | test_array.a = 0; |
10c48e14 MD |
177 | test_array.a = 8; |
178 | pthread_rwlock_unlock(&lock); | |
179 | nr_writes++; | |
59d5a406 | 180 | if (unlikely(!test_duration_write())) |
10c48e14 | 181 | break; |
59d5a406 | 182 | if (unlikely(wdelay)) |
9e31d0f0 | 183 | loop_sleep(wdelay); |
10c48e14 MD |
184 | } |
185 | ||
4bad7d45 | 186 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
187 | "writer", pthread_self(), (unsigned long)gettid()); |
188 | *count = nr_writes; | |
189 | return ((void*)2); | |
190 | } | |
191 | ||
192 | void show_usage(int argc, char **argv) | |
193 | { | |
194 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
195 | #ifdef DEBUG_YIELD | |
196 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
197 | #endif | |
7685d963 | 198 | printf(" [-d delay] (writer period (us))"); |
daddf5b0 | 199 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
4bad7d45 | 200 | printf(" [-v] (verbose output)"); |
9e97e478 | 201 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
10c48e14 MD |
202 | printf("\n"); |
203 | } | |
204 | ||
9e97e478 MD |
205 | cpu_set_t affinity; |
206 | ||
10c48e14 MD |
207 | int main(int argc, char **argv) |
208 | { | |
209 | int err; | |
210 | pthread_t *tid_reader, *tid_writer; | |
211 | void *tret; | |
212 | unsigned long long *count_reader, *count_writer; | |
213 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 MD |
214 | int i, a; |
215 | int use_affinity = 0; | |
10c48e14 MD |
216 | |
217 | if (argc < 4) { | |
218 | show_usage(argc, argv); | |
219 | return -1; | |
220 | } | |
7685d963 | 221 | smp_mb(); |
10c48e14 MD |
222 | |
223 | err = sscanf(argv[1], "%u", &nr_readers); | |
224 | if (err != 1) { | |
225 | show_usage(argc, argv); | |
226 | return -1; | |
227 | } | |
228 | ||
229 | err = sscanf(argv[2], "%u", &nr_writers); | |
230 | if (err != 1) { | |
231 | show_usage(argc, argv); | |
232 | return -1; | |
233 | } | |
234 | ||
235 | err = sscanf(argv[3], "%lu", &duration); | |
236 | if (err != 1) { | |
237 | show_usage(argc, argv); | |
238 | return -1; | |
239 | } | |
240 | ||
9e97e478 MD |
241 | CPU_ZERO(&affinity); |
242 | ||
10c48e14 MD |
243 | for (i = 4; i < argc; i++) { |
244 | if (argv[i][0] != '-') | |
245 | continue; | |
246 | switch (argv[i][1]) { | |
247 | #ifdef DEBUG_YIELD | |
248 | case 'r': | |
249 | yield_active |= YIELD_READ; | |
250 | break; | |
251 | case 'w': | |
252 | yield_active |= YIELD_WRITE; | |
253 | break; | |
254 | #endif | |
9e97e478 MD |
255 | case 'a': |
256 | if (argc < i + 2) { | |
257 | show_usage(argc, argv); | |
258 | return -1; | |
259 | } | |
260 | a = atoi(argv[++i]); | |
261 | CPU_SET(a, &affinity); | |
262 | use_affinity = 1; | |
4bad7d45 | 263 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 264 | break; |
8b632bab MD |
265 | case 'c': |
266 | if (argc < i + 2) { | |
267 | show_usage(argc, argv); | |
268 | return -1; | |
269 | } | |
9e31d0f0 | 270 | rduration = atol(argv[++i]); |
8b632bab | 271 | break; |
10c48e14 MD |
272 | case 'd': |
273 | if (argc < i + 2) { | |
274 | show_usage(argc, argv); | |
275 | return -1; | |
276 | } | |
9e31d0f0 | 277 | wdelay = atol(argv[++i]); |
10c48e14 | 278 | break; |
4bad7d45 MD |
279 | case 'v': |
280 | verbose_mode = 1; | |
281 | break; | |
10c48e14 MD |
282 | } |
283 | } | |
284 | ||
4bad7d45 | 285 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 286 | duration, nr_readers, nr_writers); |
9e31d0f0 | 287 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
288 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
289 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
10c48e14 | 290 | "main", pthread_self(), (unsigned long)gettid()); |
9e97e478 MD |
291 | if (use_affinity |
292 | && sched_setaffinity(0, sizeof(affinity), &affinity) < 0) { | |
293 | perror("sched_setaffinity"); | |
294 | exit(-1); | |
295 | } | |
10c48e14 MD |
296 | |
297 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
298 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
299 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
300 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
301 | ||
302 | for (i = 0; i < nr_readers; i++) { | |
303 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
304 | &count_reader[i]); | |
305 | if (err != 0) | |
306 | exit(1); | |
307 | } | |
308 | for (i = 0; i < nr_writers; i++) { | |
309 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
310 | &count_writer[i]); | |
311 | if (err != 0) | |
312 | exit(1); | |
313 | } | |
314 | ||
7685d963 | 315 | smp_mb(); |
10c48e14 | 316 | |
78efb485 MD |
317 | test_go = 1; |
318 | ||
319 | sleep(duration); | |
320 | ||
321 | test_stop = 1; | |
322 | ||
10c48e14 MD |
323 | for (i = 0; i < nr_readers; i++) { |
324 | err = pthread_join(tid_reader[i], &tret); | |
325 | if (err != 0) | |
326 | exit(1); | |
327 | tot_reads += count_reader[i]; | |
328 | } | |
329 | for (i = 0; i < nr_writers; i++) { | |
330 | err = pthread_join(tid_writer[i], &tret); | |
331 | if (err != 0) | |
332 | exit(1); | |
333 | tot_writes += count_writer[i]; | |
334 | } | |
4bad7d45 MD |
335 | |
336 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 337 | tot_writes); |
6a190115 | 338 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu " |
cda3c71d | 339 | "nr_writers %3u " |
9e31d0f0 | 340 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
4bad7d45 MD |
341 | argv[0], duration, nr_readers, rduration, |
342 | nr_writers, wdelay, tot_reads, tot_writes, | |
343 | tot_reads + tot_writes); | |
344 | ||
10c48e14 MD |
345 | free(tid_reader); |
346 | free(tid_writer); | |
347 | free(count_reader); | |
348 | free(count_writer); | |
349 | return 0; | |
350 | } |