Commit | Line | Data |
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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> |
bd252a04 | 38 | #include <urcu/tls-compat.h> |
51299083 | 39 | |
65fcc7e9 MD |
40 | #ifdef __linux__ |
41 | #include <syscall.h> | |
42 | #endif | |
43 | ||
2a7ac59d MD |
44 | /* hardcoded number of CPUs */ |
45 | #define NR_CPUS 16384 | |
46 | ||
51299083 MD |
47 | #if defined(_syscall0) |
48 | _syscall0(pid_t, gettid) | |
49 | #elif defined(__NR_gettid) | |
50 | static inline pid_t gettid(void) | |
51 | { | |
52 | return syscall(__NR_gettid); | |
53 | } | |
54 | #else | |
55 | #warning "use pid as tid" | |
56 | static inline pid_t gettid(void) | |
57 | { | |
58 | return getpid(); | |
59 | } | |
60 | #endif | |
61 | ||
62 | #ifndef DYNAMIC_LINK_TEST | |
63 | #define _LGPL_SOURCE | |
64 | #else | |
65 | #define debug_yield_read() | |
66 | #endif | |
ec4e58a3 | 67 | #include <urcu.h> |
51299083 MD |
68 | |
69 | struct test_array { | |
70 | int a; | |
71 | }; | |
72 | ||
73 | static pthread_mutex_t lock; | |
74 | ||
75 | static volatile int test_go, test_stop; | |
76 | ||
9e31d0f0 | 77 | static unsigned long wdelay; |
51299083 MD |
78 | |
79 | static volatile struct test_array test_array = { 8 }; | |
80 | ||
81 | static unsigned long duration; | |
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 | ||
ab0aacbe | 89 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 90 | { |
ab0aacbe | 91 | while (loops-- != 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 | { | |
95bc7fb9 | 117 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 118 | cpu_set_t mask; |
95bc7fb9 MD |
119 | int cpu, ret; |
120 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
121 | |
122 | if (!use_affinity) | |
123 | return; | |
124 | ||
d8540fc5 | 125 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
126 | ret = pthread_mutex_lock(&affinity_mutex); |
127 | if (ret) { | |
128 | perror("Error in pthread mutex lock"); | |
129 | exit(-1); | |
130 | } | |
2a7ac59d | 131 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
132 | ret = pthread_mutex_unlock(&affinity_mutex); |
133 | if (ret) { | |
134 | perror("Error in pthread mutex unlock"); | |
135 | exit(-1); | |
136 | } | |
2a7ac59d MD |
137 | CPU_ZERO(&mask); |
138 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
139 | #if SCHED_SETAFFINITY_ARGS == 2 |
140 | sched_setaffinity(0, &mask); | |
141 | #else | |
2a7ac59d | 142 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
143 | #endif |
144 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
145 | } |
146 | ||
51299083 MD |
147 | /* |
148 | * returns 0 if test should end. | |
149 | */ | |
150 | static int test_duration_write(void) | |
151 | { | |
152 | return !test_stop; | |
153 | } | |
154 | ||
155 | static int test_duration_read(void) | |
156 | { | |
157 | return !test_stop; | |
158 | } | |
159 | ||
bd252a04 MD |
160 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
161 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
51299083 | 162 | |
55271c13 | 163 | static |
06f22bdb | 164 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 165 | static |
06f22bdb | 166 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
51299083 MD |
167 | |
168 | static unsigned int nr_readers; | |
169 | static unsigned int nr_writers; | |
170 | ||
171 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
172 | ||
173 | void rcu_copy_mutex_lock(void) | |
174 | { | |
175 | int ret; | |
176 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
177 | if (ret) { | |
178 | perror("Error in pthread mutex lock"); | |
179 | exit(-1); | |
180 | } | |
181 | } | |
182 | ||
183 | void rcu_copy_mutex_unlock(void) | |
184 | { | |
185 | int ret; | |
186 | ||
187 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
188 | if (ret) { | |
189 | perror("Error in pthread mutex unlock"); | |
190 | exit(-1); | |
191 | } | |
192 | } | |
193 | ||
194 | void *thr_reader(void *data) | |
195 | { | |
196 | unsigned long tidx = (unsigned long)data; | |
197 | ||
4bad7d45 | 198 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
199 | "reader", (unsigned long) pthread_self(), |
200 | (unsigned long) gettid()); | |
51299083 | 201 | |
2a7ac59d MD |
202 | set_affinity(); |
203 | ||
51299083 MD |
204 | while (!test_go) |
205 | { | |
206 | } | |
207 | ||
208 | for (;;) { | |
209 | pthread_mutex_lock(&lock); | |
210 | assert(test_array.a == 8); | |
a0b7f7ea | 211 | if (caa_unlikely(rduration)) |
daddf5b0 | 212 | loop_sleep(rduration); |
51299083 | 213 | pthread_mutex_unlock(&lock); |
bd252a04 | 214 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 215 | if (caa_unlikely(!test_duration_read())) |
51299083 MD |
216 | break; |
217 | } | |
218 | ||
bd252a04 | 219 | tot_nr_reads[tidx] = URCU_TLS(nr_reads); |
cda3c71d | 220 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
221 | "reader", (unsigned long) pthread_self(), |
222 | (unsigned long) gettid()); | |
51299083 MD |
223 | return ((void*)1); |
224 | ||
225 | } | |
226 | ||
227 | void *thr_writer(void *data) | |
228 | { | |
229 | unsigned long wtidx = (unsigned long)data; | |
230 | ||
4bad7d45 | 231 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
232 | "writer", (unsigned long) pthread_self(), |
233 | (unsigned long) gettid()); | |
51299083 | 234 | |
2a7ac59d MD |
235 | set_affinity(); |
236 | ||
51299083 MD |
237 | while (!test_go) |
238 | { | |
239 | } | |
5481ddb3 | 240 | cmm_smp_mb(); |
51299083 MD |
241 | |
242 | for (;;) { | |
243 | pthread_mutex_lock(&lock); | |
244 | test_array.a = 0; | |
245 | test_array.a = 8; | |
a0b7f7ea | 246 | if (caa_unlikely(wduration)) |
31b598e0 | 247 | loop_sleep(wduration); |
51299083 | 248 | pthread_mutex_unlock(&lock); |
bd252a04 | 249 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 250 | if (caa_unlikely(!test_duration_write())) |
51299083 | 251 | break; |
a0b7f7ea | 252 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 253 | loop_sleep(wdelay); |
51299083 MD |
254 | } |
255 | ||
4bad7d45 | 256 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
257 | "writer", (unsigned long) pthread_self(), |
258 | (unsigned long) gettid()); | |
bd252a04 | 259 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
51299083 MD |
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)"); |
51299083 MD |
273 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
274 | printf("\n"); | |
275 | } | |
276 | ||
51299083 MD |
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; | |
284 | int i, a; | |
51299083 MD |
285 | |
286 | if (argc < 4) { | |
287 | show_usage(argc, argv); | |
288 | return -1; | |
289 | } | |
5481ddb3 | 290 | cmm_smp_mb(); |
51299083 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 | ||
51299083 MD |
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 | |
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; |
51299083 | 329 | use_affinity = 1; |
4bad7d45 | 330 | printf_verbose("Adding CPU %d affinity\n", a); |
51299083 | 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; |
51299083 MD |
339 | case 'd': |
340 | if (argc < i + 2) { | |
341 | show_usage(argc, argv); | |
342 | return -1; | |
343 | } | |
9e31d0f0 | 344 | wdelay = atol(argv[++i]); |
51299083 | 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; | |
51299083 MD |
356 | } |
357 | } | |
358 | ||
4bad7d45 | 359 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
51299083 | 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", | |
6ff854ac MD |
364 | "main", (unsigned long) pthread_self(), |
365 | (unsigned long) gettid()); | |
51299083 | 366 | |
51299083 MD |
367 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
368 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
369 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
370 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
371 | tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers); | |
372 | tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers); | |
373 | ||
2a7ac59d MD |
374 | next_aff = 0; |
375 | ||
51299083 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(); |
51299083 MD |
390 | |
391 | test_go = 1; | |
392 | ||
393 | sleep(duration); | |
394 | ||
395 | test_stop = 1; | |
396 | ||
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, | |
51299083 | 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 | ||
51299083 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 | return 0; | |
426 | } |