Commit | Line | Data |
---|---|---|
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 | ||
55271c13 MD |
38 | /* Make this big enough to include the POWER5+ L3 cacheline size of 256B */ |
39 | #define CACHE_LINE_SIZE 4096 | |
40 | ||
2a7ac59d MD |
41 | /* hardcoded number of CPUs */ |
42 | #define NR_CPUS 16384 | |
43 | ||
10c48e14 MD |
44 | #if defined(_syscall0) |
45 | _syscall0(pid_t, gettid) | |
46 | #elif defined(__NR_gettid) | |
47 | static inline pid_t gettid(void) | |
48 | { | |
49 | return syscall(__NR_gettid); | |
50 | } | |
51 | #else | |
52 | #warning "use pid as tid" | |
53 | static inline pid_t gettid(void) | |
54 | { | |
55 | return getpid(); | |
56 | } | |
57 | #endif | |
58 | ||
59 | #ifndef DYNAMIC_LINK_TEST | |
60 | #define _LGPL_SOURCE | |
61 | #else | |
62 | #define debug_yield_read() | |
63 | #endif | |
64 | #include "urcu.h" | |
65 | ||
66 | struct test_array { | |
67 | int a; | |
68 | }; | |
69 | ||
70 | pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; | |
71 | ||
78efb485 | 72 | static volatile int test_go, test_stop; |
10c48e14 | 73 | |
9e31d0f0 | 74 | static unsigned long wdelay; |
10c48e14 | 75 | |
2b4e4125 | 76 | static volatile struct test_array test_array = { 8 }; |
10c48e14 MD |
77 | |
78 | static unsigned long duration; | |
10c48e14 | 79 | |
daddf5b0 | 80 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
81 | static unsigned long rduration; |
82 | ||
daddf5b0 MD |
83 | static inline void loop_sleep(unsigned long l) |
84 | { | |
85 | while(l-- != 0) | |
86 | cpu_relax(); | |
87 | } | |
88 | ||
4bad7d45 MD |
89 | static int verbose_mode; |
90 | ||
91 | #define printf_verbose(fmt, args...) \ | |
92 | do { \ | |
93 | if (verbose_mode) \ | |
94 | printf(fmt, args); \ | |
95 | } while (0) | |
96 | ||
2a7ac59d MD |
97 | static unsigned int cpu_affinities[NR_CPUS]; |
98 | static unsigned int next_aff = 0; | |
99 | static int use_affinity = 0; | |
100 | ||
101 | static void set_affinity(void) | |
102 | { | |
103 | cpu_set_t mask; | |
104 | int cpu; | |
105 | ||
106 | if (!use_affinity) | |
107 | return; | |
108 | ||
109 | cpu = cpu_affinities[next_aff++]; | |
110 | CPU_ZERO(&mask); | |
111 | CPU_SET(cpu, &mask); | |
112 | sched_setaffinity(0, sizeof(mask), &mask); | |
113 | } | |
114 | ||
115 | ||
116 | ||
10c48e14 MD |
117 | /* |
118 | * returns 0 if test should end. | |
119 | */ | |
120 | static int test_duration_write(void) | |
121 | { | |
78efb485 | 122 | return !test_stop; |
10c48e14 MD |
123 | } |
124 | ||
125 | static int test_duration_read(void) | |
126 | { | |
78efb485 | 127 | return !test_stop; |
10c48e14 MD |
128 | } |
129 | ||
130 | static unsigned long long __thread nr_writes; | |
131 | static unsigned long long __thread nr_reads; | |
132 | ||
133 | static unsigned int nr_readers; | |
134 | static unsigned int nr_writers; | |
135 | ||
136 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
137 | ||
138 | void rcu_copy_mutex_lock(void) | |
139 | { | |
140 | int ret; | |
141 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
142 | if (ret) { | |
143 | perror("Error in pthread mutex lock"); | |
144 | exit(-1); | |
145 | } | |
146 | } | |
147 | ||
148 | void rcu_copy_mutex_unlock(void) | |
149 | { | |
150 | int ret; | |
151 | ||
152 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
153 | if (ret) { | |
154 | perror("Error in pthread mutex unlock"); | |
155 | exit(-1); | |
156 | } | |
157 | } | |
158 | ||
159 | void *thr_reader(void *_count) | |
160 | { | |
161 | unsigned long long *count = _count; | |
162 | ||
4bad7d45 | 163 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
164 | "reader", pthread_self(), (unsigned long)gettid()); |
165 | ||
2a7ac59d MD |
166 | set_affinity(); |
167 | ||
10c48e14 MD |
168 | while (!test_go) |
169 | { | |
170 | } | |
171 | ||
172 | for (;;) { | |
173 | pthread_rwlock_rdlock(&lock); | |
174 | assert(test_array.a == 8); | |
8b632bab | 175 | if (unlikely(rduration)) |
daddf5b0 | 176 | loop_sleep(rduration); |
10c48e14 MD |
177 | pthread_rwlock_unlock(&lock); |
178 | nr_reads++; | |
59d5a406 | 179 | if (unlikely(!test_duration_read())) |
10c48e14 MD |
180 | break; |
181 | } | |
182 | ||
183 | *count = nr_reads; | |
4bad7d45 | 184 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
185 | "reader", pthread_self(), (unsigned long)gettid()); |
186 | return ((void*)1); | |
187 | ||
188 | } | |
189 | ||
190 | void *thr_writer(void *_count) | |
191 | { | |
192 | unsigned long long *count = _count; | |
193 | ||
4bad7d45 | 194 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
195 | "writer", pthread_self(), (unsigned long)gettid()); |
196 | ||
2a7ac59d MD |
197 | set_affinity(); |
198 | ||
10c48e14 MD |
199 | while (!test_go) |
200 | { | |
201 | } | |
7685d963 | 202 | smp_mb(); |
10c48e14 MD |
203 | |
204 | for (;;) { | |
205 | pthread_rwlock_wrlock(&lock); | |
2b4e4125 | 206 | test_array.a = 0; |
10c48e14 MD |
207 | test_array.a = 8; |
208 | pthread_rwlock_unlock(&lock); | |
209 | nr_writes++; | |
59d5a406 | 210 | if (unlikely(!test_duration_write())) |
10c48e14 | 211 | break; |
59d5a406 | 212 | if (unlikely(wdelay)) |
9e31d0f0 | 213 | loop_sleep(wdelay); |
10c48e14 MD |
214 | } |
215 | ||
4bad7d45 | 216 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
217 | "writer", pthread_self(), (unsigned long)gettid()); |
218 | *count = nr_writes; | |
219 | return ((void*)2); | |
220 | } | |
221 | ||
222 | void show_usage(int argc, char **argv) | |
223 | { | |
224 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
225 | #ifdef DEBUG_YIELD | |
226 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
227 | #endif | |
7685d963 | 228 | printf(" [-d delay] (writer period (us))"); |
daddf5b0 | 229 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
4bad7d45 | 230 | printf(" [-v] (verbose output)"); |
9e97e478 | 231 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
10c48e14 MD |
232 | printf("\n"); |
233 | } | |
234 | ||
235 | int main(int argc, char **argv) | |
236 | { | |
237 | int err; | |
238 | pthread_t *tid_reader, *tid_writer; | |
239 | void *tret; | |
240 | unsigned long long *count_reader, *count_writer; | |
241 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 242 | int i, a; |
10c48e14 MD |
243 | |
244 | if (argc < 4) { | |
245 | show_usage(argc, argv); | |
246 | return -1; | |
247 | } | |
7685d963 | 248 | smp_mb(); |
10c48e14 MD |
249 | |
250 | err = sscanf(argv[1], "%u", &nr_readers); | |
251 | if (err != 1) { | |
252 | show_usage(argc, argv); | |
253 | return -1; | |
254 | } | |
255 | ||
256 | err = sscanf(argv[2], "%u", &nr_writers); | |
257 | if (err != 1) { | |
258 | show_usage(argc, argv); | |
259 | return -1; | |
260 | } | |
261 | ||
262 | err = sscanf(argv[3], "%lu", &duration); | |
263 | if (err != 1) { | |
264 | show_usage(argc, argv); | |
265 | return -1; | |
266 | } | |
267 | ||
268 | for (i = 4; i < argc; i++) { | |
269 | if (argv[i][0] != '-') | |
270 | continue; | |
271 | switch (argv[i][1]) { | |
272 | #ifdef DEBUG_YIELD | |
273 | case 'r': | |
274 | yield_active |= YIELD_READ; | |
275 | break; | |
276 | case 'w': | |
277 | yield_active |= YIELD_WRITE; | |
278 | break; | |
279 | #endif | |
9e97e478 MD |
280 | case 'a': |
281 | if (argc < i + 2) { | |
282 | show_usage(argc, argv); | |
283 | return -1; | |
284 | } | |
285 | a = atoi(argv[++i]); | |
2a7ac59d | 286 | cpu_affinities[next_aff++] = a; |
9e97e478 | 287 | use_affinity = 1; |
4bad7d45 | 288 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 289 | break; |
8b632bab MD |
290 | case 'c': |
291 | if (argc < i + 2) { | |
292 | show_usage(argc, argv); | |
293 | return -1; | |
294 | } | |
9e31d0f0 | 295 | rduration = atol(argv[++i]); |
8b632bab | 296 | break; |
10c48e14 MD |
297 | case 'd': |
298 | if (argc < i + 2) { | |
299 | show_usage(argc, argv); | |
300 | return -1; | |
301 | } | |
9e31d0f0 | 302 | wdelay = atol(argv[++i]); |
10c48e14 | 303 | break; |
4bad7d45 MD |
304 | case 'v': |
305 | verbose_mode = 1; | |
306 | break; | |
10c48e14 MD |
307 | } |
308 | } | |
309 | ||
4bad7d45 | 310 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 311 | duration, nr_readers, nr_writers); |
9e31d0f0 | 312 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
313 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
314 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
10c48e14 MD |
315 | "main", pthread_self(), (unsigned long)gettid()); |
316 | ||
317 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
318 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
319 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
320 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
321 | ||
2a7ac59d MD |
322 | next_aff = 0; |
323 | ||
10c48e14 MD |
324 | for (i = 0; i < nr_readers; i++) { |
325 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
326 | &count_reader[i]); | |
327 | if (err != 0) | |
328 | exit(1); | |
329 | } | |
330 | for (i = 0; i < nr_writers; i++) { | |
331 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
332 | &count_writer[i]); | |
333 | if (err != 0) | |
334 | exit(1); | |
335 | } | |
336 | ||
7685d963 | 337 | smp_mb(); |
10c48e14 | 338 | |
78efb485 MD |
339 | test_go = 1; |
340 | ||
341 | sleep(duration); | |
342 | ||
343 | test_stop = 1; | |
344 | ||
10c48e14 MD |
345 | for (i = 0; i < nr_readers; i++) { |
346 | err = pthread_join(tid_reader[i], &tret); | |
347 | if (err != 0) | |
348 | exit(1); | |
349 | tot_reads += count_reader[i]; | |
350 | } | |
351 | for (i = 0; i < nr_writers; i++) { | |
352 | err = pthread_join(tid_writer[i], &tret); | |
353 | if (err != 0) | |
354 | exit(1); | |
355 | tot_writes += count_writer[i]; | |
356 | } | |
4bad7d45 MD |
357 | |
358 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 359 | tot_writes); |
6a190115 | 360 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu " |
cda3c71d | 361 | "nr_writers %3u " |
9e31d0f0 | 362 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
4bad7d45 MD |
363 | argv[0], duration, nr_readers, rduration, |
364 | nr_writers, wdelay, tot_reads, tot_writes, | |
365 | tot_reads + tot_writes); | |
366 | ||
10c48e14 MD |
367 | free(tid_reader); |
368 | free(tid_writer); | |
369 | free(count_reader); | |
370 | free(count_writer); | |
371 | return 0; | |
372 | } |