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51299083 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> |
51299083 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 | ||
23 | #define _GNU_SOURCE | |
d8540fc5 | 24 | #include "../config.h" |
51299083 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> | |
51299083 | 34 | #include <sched.h> |
94b343fd | 35 | #include <errno.h> |
51299083 | 36 | |
ec4e58a3 | 37 | #include <urcu/arch.h> |
51299083 | 38 | |
65fcc7e9 MD |
39 | #ifdef __linux__ |
40 | #include <syscall.h> | |
41 | #endif | |
42 | ||
2a7ac59d MD |
43 | /* hardcoded number of CPUs */ |
44 | #define NR_CPUS 16384 | |
45 | ||
51299083 MD |
46 | #if defined(_syscall0) |
47 | _syscall0(pid_t, gettid) | |
48 | #elif defined(__NR_gettid) | |
49 | static inline pid_t gettid(void) | |
50 | { | |
51 | return syscall(__NR_gettid); | |
52 | } | |
53 | #else | |
54 | #warning "use pid as tid" | |
55 | static inline pid_t gettid(void) | |
56 | { | |
57 | return getpid(); | |
58 | } | |
59 | #endif | |
60 | ||
61 | #ifndef DYNAMIC_LINK_TEST | |
62 | #define _LGPL_SOURCE | |
63 | #else | |
64 | #define debug_yield_read() | |
65 | #endif | |
ec4e58a3 | 66 | #include <urcu.h> |
51299083 MD |
67 | |
68 | struct test_array { | |
69 | int a; | |
70 | }; | |
71 | ||
72 | static pthread_mutex_t lock; | |
73 | ||
74 | static volatile int test_go, test_stop; | |
75 | ||
9e31d0f0 | 76 | static unsigned long wdelay; |
51299083 MD |
77 | |
78 | static volatile struct test_array test_array = { 8 }; | |
79 | ||
80 | static unsigned long duration; | |
81 | ||
daddf5b0 | 82 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
83 | static unsigned long rduration; |
84 | ||
31b598e0 MD |
85 | /* write-side C.S. duration, in loops */ |
86 | static unsigned long wduration; | |
87 | ||
daddf5b0 MD |
88 | static inline void loop_sleep(unsigned long l) |
89 | { | |
90 | while(l-- != 0) | |
06f22bdb | 91 | caa_cpu_relax(); |
daddf5b0 MD |
92 | } |
93 | ||
4bad7d45 MD |
94 | static int verbose_mode; |
95 | ||
96 | #define printf_verbose(fmt, args...) \ | |
97 | do { \ | |
98 | if (verbose_mode) \ | |
99 | printf(fmt, args); \ | |
100 | } while (0) | |
101 | ||
2a7ac59d MD |
102 | static unsigned int cpu_affinities[NR_CPUS]; |
103 | static unsigned int next_aff = 0; | |
104 | static int use_affinity = 0; | |
105 | ||
6af882ba MD |
106 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
107 | ||
d8540fc5 PA |
108 | #ifndef HAVE_CPU_SET_T |
109 | typedef unsigned long cpu_set_t; | |
110 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
111 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
112 | #endif | |
113 | ||
2a7ac59d MD |
114 | static void set_affinity(void) |
115 | { | |
116 | cpu_set_t mask; | |
117 | int cpu; | |
6af882ba | 118 | int ret; |
2a7ac59d MD |
119 | |
120 | if (!use_affinity) | |
121 | return; | |
122 | ||
d8540fc5 | 123 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
124 | ret = pthread_mutex_lock(&affinity_mutex); |
125 | if (ret) { | |
126 | perror("Error in pthread mutex lock"); | |
127 | exit(-1); | |
128 | } | |
2a7ac59d | 129 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
130 | ret = pthread_mutex_unlock(&affinity_mutex); |
131 | if (ret) { | |
132 | perror("Error in pthread mutex unlock"); | |
133 | exit(-1); | |
134 | } | |
2a7ac59d MD |
135 | CPU_ZERO(&mask); |
136 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
137 | #if SCHED_SETAFFINITY_ARGS == 2 |
138 | sched_setaffinity(0, &mask); | |
139 | #else | |
2a7ac59d | 140 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
141 | #endif |
142 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
143 | } |
144 | ||
51299083 MD |
145 | /* |
146 | * returns 0 if test should end. | |
147 | */ | |
148 | static int test_duration_write(void) | |
149 | { | |
150 | return !test_stop; | |
151 | } | |
152 | ||
153 | static int test_duration_read(void) | |
154 | { | |
155 | return !test_stop; | |
156 | } | |
157 | ||
158 | static unsigned long long __thread nr_writes; | |
159 | static unsigned long long __thread nr_reads; | |
160 | ||
55271c13 | 161 | static |
06f22bdb | 162 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 163 | static |
06f22bdb | 164 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
51299083 MD |
165 | |
166 | static unsigned int nr_readers; | |
167 | static unsigned int nr_writers; | |
168 | ||
169 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
170 | ||
171 | void rcu_copy_mutex_lock(void) | |
172 | { | |
173 | int ret; | |
174 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
175 | if (ret) { | |
176 | perror("Error in pthread mutex lock"); | |
177 | exit(-1); | |
178 | } | |
179 | } | |
180 | ||
181 | void rcu_copy_mutex_unlock(void) | |
182 | { | |
183 | int ret; | |
184 | ||
185 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
186 | if (ret) { | |
187 | perror("Error in pthread mutex unlock"); | |
188 | exit(-1); | |
189 | } | |
190 | } | |
191 | ||
192 | void *thr_reader(void *data) | |
193 | { | |
194 | unsigned long tidx = (unsigned long)data; | |
195 | ||
4bad7d45 | 196 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
51299083 MD |
197 | "reader", pthread_self(), (unsigned long)gettid()); |
198 | ||
2a7ac59d MD |
199 | set_affinity(); |
200 | ||
51299083 MD |
201 | while (!test_go) |
202 | { | |
203 | } | |
204 | ||
205 | for (;;) { | |
206 | pthread_mutex_lock(&lock); | |
207 | assert(test_array.a == 8); | |
a0b7f7ea | 208 | if (caa_unlikely(rduration)) |
daddf5b0 | 209 | loop_sleep(rduration); |
51299083 MD |
210 | pthread_mutex_unlock(&lock); |
211 | nr_reads++; | |
a0b7f7ea | 212 | if (caa_unlikely(!test_duration_read())) |
51299083 MD |
213 | break; |
214 | } | |
215 | ||
216 | tot_nr_reads[tidx] = nr_reads; | |
cda3c71d | 217 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
51299083 MD |
218 | "reader", pthread_self(), (unsigned long)gettid()); |
219 | return ((void*)1); | |
220 | ||
221 | } | |
222 | ||
223 | void *thr_writer(void *data) | |
224 | { | |
225 | unsigned long wtidx = (unsigned long)data; | |
226 | ||
4bad7d45 | 227 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
51299083 MD |
228 | "writer", pthread_self(), (unsigned long)gettid()); |
229 | ||
2a7ac59d MD |
230 | set_affinity(); |
231 | ||
51299083 MD |
232 | while (!test_go) |
233 | { | |
234 | } | |
5481ddb3 | 235 | cmm_smp_mb(); |
51299083 MD |
236 | |
237 | for (;;) { | |
238 | pthread_mutex_lock(&lock); | |
239 | test_array.a = 0; | |
240 | test_array.a = 8; | |
a0b7f7ea | 241 | if (caa_unlikely(wduration)) |
31b598e0 | 242 | loop_sleep(wduration); |
51299083 MD |
243 | pthread_mutex_unlock(&lock); |
244 | nr_writes++; | |
a0b7f7ea | 245 | if (caa_unlikely(!test_duration_write())) |
51299083 | 246 | break; |
a0b7f7ea | 247 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 248 | loop_sleep(wdelay); |
51299083 MD |
249 | } |
250 | ||
4bad7d45 | 251 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
51299083 MD |
252 | "writer", pthread_self(), (unsigned long)gettid()); |
253 | tot_nr_writes[wtidx] = nr_writes; | |
254 | return ((void*)2); | |
255 | } | |
256 | ||
257 | void show_usage(int argc, char **argv) | |
258 | { | |
259 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
260 | #ifdef DEBUG_YIELD | |
261 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
262 | #endif | |
263 | printf(" [-d delay] (writer period (us))"); | |
daddf5b0 | 264 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 265 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 266 | printf(" [-v] (verbose output)"); |
51299083 MD |
267 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
268 | printf("\n"); | |
269 | } | |
270 | ||
51299083 MD |
271 | int main(int argc, char **argv) |
272 | { | |
273 | int err; | |
274 | pthread_t *tid_reader, *tid_writer; | |
275 | void *tret; | |
276 | unsigned long long *count_reader, *count_writer; | |
277 | unsigned long long tot_reads = 0, tot_writes = 0; | |
278 | int i, a; | |
51299083 MD |
279 | |
280 | if (argc < 4) { | |
281 | show_usage(argc, argv); | |
282 | return -1; | |
283 | } | |
5481ddb3 | 284 | cmm_smp_mb(); |
51299083 MD |
285 | |
286 | err = sscanf(argv[1], "%u", &nr_readers); | |
287 | if (err != 1) { | |
288 | show_usage(argc, argv); | |
289 | return -1; | |
290 | } | |
291 | ||
292 | err = sscanf(argv[2], "%u", &nr_writers); | |
293 | if (err != 1) { | |
294 | show_usage(argc, argv); | |
295 | return -1; | |
296 | } | |
297 | ||
298 | err = sscanf(argv[3], "%lu", &duration); | |
299 | if (err != 1) { | |
300 | show_usage(argc, argv); | |
301 | return -1; | |
302 | } | |
303 | ||
51299083 MD |
304 | for (i = 4; i < argc; i++) { |
305 | if (argv[i][0] != '-') | |
306 | continue; | |
307 | switch (argv[i][1]) { | |
308 | #ifdef DEBUG_YIELD | |
309 | case 'r': | |
310 | yield_active |= YIELD_READ; | |
311 | break; | |
312 | case 'w': | |
313 | yield_active |= YIELD_WRITE; | |
314 | break; | |
315 | #endif | |
316 | case 'a': | |
317 | if (argc < i + 2) { | |
318 | show_usage(argc, argv); | |
319 | return -1; | |
320 | } | |
321 | a = atoi(argv[++i]); | |
2a7ac59d | 322 | cpu_affinities[next_aff++] = a; |
51299083 | 323 | use_affinity = 1; |
4bad7d45 | 324 | printf_verbose("Adding CPU %d affinity\n", a); |
51299083 | 325 | break; |
8b632bab MD |
326 | case 'c': |
327 | if (argc < i + 2) { | |
328 | show_usage(argc, argv); | |
329 | return -1; | |
330 | } | |
9e31d0f0 | 331 | rduration = atol(argv[++i]); |
8b632bab | 332 | break; |
51299083 MD |
333 | case 'd': |
334 | if (argc < i + 2) { | |
335 | show_usage(argc, argv); | |
336 | return -1; | |
337 | } | |
9e31d0f0 | 338 | wdelay = atol(argv[++i]); |
51299083 | 339 | break; |
31b598e0 MD |
340 | case 'e': |
341 | if (argc < i + 2) { | |
342 | show_usage(argc, argv); | |
343 | return -1; | |
344 | } | |
345 | wduration = atol(argv[++i]); | |
346 | break; | |
4bad7d45 MD |
347 | case 'v': |
348 | verbose_mode = 1; | |
349 | break; | |
51299083 MD |
350 | } |
351 | } | |
352 | ||
4bad7d45 | 353 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
51299083 | 354 | duration, nr_readers, nr_writers); |
9e31d0f0 | 355 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
356 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
357 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
51299083 MD |
358 | "main", pthread_self(), (unsigned long)gettid()); |
359 | ||
51299083 MD |
360 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
361 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
362 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
363 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
364 | tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers); | |
365 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
366 | ||
2a7ac59d MD |
367 | next_aff = 0; |
368 | ||
51299083 MD |
369 | for (i = 0; i < nr_readers; i++) { |
370 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
371 | (void *)(long)i); | |
372 | if (err != 0) | |
373 | exit(1); | |
374 | } | |
375 | for (i = 0; i < nr_writers; i++) { | |
376 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
377 | (void *)(long)i); | |
378 | if (err != 0) | |
379 | exit(1); | |
380 | } | |
381 | ||
5481ddb3 | 382 | cmm_smp_mb(); |
51299083 MD |
383 | |
384 | test_go = 1; | |
385 | ||
386 | sleep(duration); | |
387 | ||
388 | test_stop = 1; | |
389 | ||
390 | for (i = 0; i < nr_readers; i++) { | |
391 | err = pthread_join(tid_reader[i], &tret); | |
392 | if (err != 0) | |
393 | exit(1); | |
394 | tot_reads += tot_nr_reads[i]; | |
395 | } | |
396 | for (i = 0; i < nr_writers; i++) { | |
397 | err = pthread_join(tid_writer[i], &tret); | |
398 | if (err != 0) | |
399 | exit(1); | |
400 | tot_writes += tot_nr_writes[i]; | |
401 | } | |
4bad7d45 MD |
402 | |
403 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
51299083 | 404 | tot_writes); |
a50a7b43 | 405 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 406 | "nr_writers %3u " |
9e31d0f0 | 407 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 408 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
409 | nr_writers, wdelay, tot_reads, tot_writes, |
410 | tot_reads + tot_writes); | |
411 | ||
51299083 MD |
412 | free(tid_reader); |
413 | free(tid_writer); | |
414 | free(count_reader); | |
415 | free(count_writer); | |
416 | free(tot_nr_reads); | |
417 | free(tot_nr_writes); | |
418 | return 0; | |
419 | } |