Commit | Line | Data |
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ce29b371 MJ |
1 | // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2 | // | |
3 | // SPDX-License-Identifier: GPL-2.0-or-later | |
4 | ||
0ee8bb0a | 5 | /* |
0ee8bb0a | 6 | * Userspace RCU library - test program |
0ee8bb0a MD |
7 | */ |
8 | ||
9 | #include <stdio.h> | |
10 | #include <pthread.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/types.h> | |
14 | #include <sys/wait.h> | |
15 | #include <unistd.h> | |
16 | #include <stdio.h> | |
94b343fd | 17 | #include <errno.h> |
0ee8bb0a | 18 | |
ec4e58a3 | 19 | #include <urcu/arch.h> |
01477510 | 20 | #include <urcu/assert.h> |
bd252a04 | 21 | #include <urcu/tls-compat.h> |
94df6318 | 22 | #include "thread-id.h" |
65fcc7e9 | 23 | |
2a7ac59d MD |
24 | /* hardcoded number of CPUs */ |
25 | #define NR_CPUS 16384 | |
26 | ||
0ee8bb0a MD |
27 | #ifndef DYNAMIC_LINK_TEST |
28 | #define _LGPL_SOURCE | |
0ee8bb0a | 29 | #endif |
ec4e58a3 | 30 | #include <urcu.h> |
0ee8bb0a MD |
31 | |
32 | struct test_array { | |
33 | int a; | |
34 | }; | |
35 | ||
36 | struct per_thread_lock { | |
37 | pthread_mutex_t lock; | |
06f22bdb | 38 | } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */ |
0ee8bb0a MD |
39 | |
40 | static struct per_thread_lock *per_thread_lock; | |
41 | ||
78efb485 | 42 | static volatile int test_go, test_stop; |
0ee8bb0a | 43 | |
9e31d0f0 | 44 | static unsigned long wdelay; |
0ee8bb0a | 45 | |
2b4e4125 | 46 | static volatile struct test_array test_array = { 8 }; |
0ee8bb0a MD |
47 | |
48 | static unsigned long duration; | |
0ee8bb0a | 49 | |
daddf5b0 | 50 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
51 | static unsigned long rduration; |
52 | ||
31b598e0 MD |
53 | /* write-side C.S. duration, in loops */ |
54 | static unsigned long wduration; | |
55 | ||
ab0aacbe | 56 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 57 | { |
ab0aacbe | 58 | while (loops-- != 0) |
06f22bdb | 59 | caa_cpu_relax(); |
daddf5b0 MD |
60 | } |
61 | ||
4bad7d45 MD |
62 | static int verbose_mode; |
63 | ||
64 | #define printf_verbose(fmt, args...) \ | |
65 | do { \ | |
66 | if (verbose_mode) \ | |
67 | printf(fmt, args); \ | |
68 | } while (0) | |
69 | ||
2a7ac59d MD |
70 | static unsigned int cpu_affinities[NR_CPUS]; |
71 | static unsigned int next_aff = 0; | |
72 | static int use_affinity = 0; | |
73 | ||
6af882ba MD |
74 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
75 | ||
2a7ac59d MD |
76 | static void set_affinity(void) |
77 | { | |
2388c075 | 78 | #ifdef HAVE_SCHED_SETAFFINITY |
2a7ac59d | 79 | cpu_set_t mask; |
95bc7fb9 MD |
80 | int cpu, ret; |
81 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
82 | |
83 | if (!use_affinity) | |
84 | return; | |
85 | ||
2388c075 | 86 | #ifdef HAVE_SCHED_SETAFFINITY |
6af882ba MD |
87 | ret = pthread_mutex_lock(&affinity_mutex); |
88 | if (ret) { | |
f597a8b9 | 89 | errno = ret; |
6af882ba | 90 | perror("Error in pthread mutex lock"); |
f597a8b9 | 91 | abort(); |
6af882ba | 92 | } |
2a7ac59d | 93 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
94 | ret = pthread_mutex_unlock(&affinity_mutex); |
95 | if (ret) { | |
f597a8b9 | 96 | errno = ret; |
6af882ba | 97 | perror("Error in pthread mutex unlock"); |
f597a8b9 | 98 | abort(); |
6af882ba | 99 | } |
2a7ac59d MD |
100 | CPU_ZERO(&mask); |
101 | CPU_SET(cpu, &mask); | |
102 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 103 | #endif /* HAVE_SCHED_SETAFFINITY */ |
2a7ac59d MD |
104 | } |
105 | ||
0ee8bb0a MD |
106 | /* |
107 | * returns 0 if test should end. | |
108 | */ | |
109 | static int test_duration_write(void) | |
110 | { | |
78efb485 | 111 | return !test_stop; |
0ee8bb0a MD |
112 | } |
113 | ||
114 | static int test_duration_read(void) | |
115 | { | |
78efb485 | 116 | return !test_stop; |
0ee8bb0a MD |
117 | } |
118 | ||
bd252a04 MD |
119 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
120 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
0ee8bb0a | 121 | |
55271c13 | 122 | static |
06f22bdb | 123 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; |
55271c13 | 124 | static |
06f22bdb | 125 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads; |
0ee8bb0a MD |
126 | |
127 | static unsigned int nr_readers; | |
128 | static unsigned int nr_writers; | |
129 | ||
f597a8b9 | 130 | static void urcu_mutex_lock(pthread_mutex_t *lock) |
0ee8bb0a MD |
131 | { |
132 | int ret; | |
f597a8b9 MD |
133 | |
134 | ret = pthread_mutex_lock(lock); | |
0ee8bb0a | 135 | if (ret) { |
f597a8b9 | 136 | errno = ret; |
0ee8bb0a | 137 | perror("Error in pthread mutex lock"); |
f597a8b9 | 138 | abort(); |
0ee8bb0a MD |
139 | } |
140 | } | |
141 | ||
f597a8b9 | 142 | static void urcu_mutex_unlock(pthread_mutex_t *lock) |
0ee8bb0a MD |
143 | { |
144 | int ret; | |
145 | ||
f597a8b9 | 146 | ret = pthread_mutex_unlock(lock); |
0ee8bb0a | 147 | if (ret) { |
f597a8b9 | 148 | errno = ret; |
0ee8bb0a | 149 | perror("Error in pthread mutex unlock"); |
f597a8b9 | 150 | abort(); |
0ee8bb0a MD |
151 | } |
152 | } | |
153 | ||
61c3fb60 | 154 | static |
0ee8bb0a MD |
155 | void *thr_reader(void *data) |
156 | { | |
157 | unsigned long tidx = (unsigned long)data; | |
158 | ||
94df6318 MD |
159 | printf_verbose("thread_begin %s, tid %lu\n", |
160 | "reader", urcu_get_thread_id()); | |
0ee8bb0a | 161 | |
2a7ac59d MD |
162 | set_affinity(); |
163 | ||
0ee8bb0a MD |
164 | while (!test_go) |
165 | { | |
166 | } | |
167 | ||
168 | for (;;) { | |
19d0e7ef MD |
169 | int v; |
170 | ||
f597a8b9 | 171 | urcu_mutex_lock(&per_thread_lock[tidx].lock); |
19d0e7ef | 172 | v = test_array.a; |
01477510 | 173 | urcu_posix_assert(v == 8); |
a0b7f7ea | 174 | if (caa_unlikely(rduration)) |
daddf5b0 | 175 | loop_sleep(rduration); |
f597a8b9 | 176 | urcu_mutex_unlock(&per_thread_lock[tidx].lock); |
bd252a04 | 177 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 178 | if (caa_unlikely(!test_duration_read())) |
0ee8bb0a MD |
179 | break; |
180 | } | |
181 | ||
bd252a04 | 182 | tot_nr_reads[tidx] = URCU_TLS(nr_reads); |
94df6318 MD |
183 | printf_verbose("thread_end %s, tid %lu\n", |
184 | "reader", urcu_get_thread_id()); | |
0ee8bb0a MD |
185 | return ((void*)1); |
186 | ||
187 | } | |
188 | ||
61c3fb60 | 189 | static |
0ee8bb0a MD |
190 | void *thr_writer(void *data) |
191 | { | |
192 | unsigned long wtidx = (unsigned long)data; | |
193 | long tidx; | |
194 | ||
94df6318 MD |
195 | printf_verbose("thread_begin %s, tid %lu\n", |
196 | "writer", urcu_get_thread_id()); | |
0ee8bb0a | 197 | |
2a7ac59d MD |
198 | set_affinity(); |
199 | ||
0ee8bb0a MD |
200 | while (!test_go) |
201 | { | |
202 | } | |
5481ddb3 | 203 | cmm_smp_mb(); |
0ee8bb0a MD |
204 | |
205 | for (;;) { | |
d266df35 | 206 | for (tidx = 0; tidx < (long)nr_readers; tidx++) { |
f597a8b9 | 207 | urcu_mutex_lock(&per_thread_lock[tidx].lock); |
0ee8bb0a | 208 | } |
2b4e4125 | 209 | test_array.a = 0; |
0ee8bb0a | 210 | test_array.a = 8; |
a0b7f7ea | 211 | if (caa_unlikely(wduration)) |
31b598e0 | 212 | loop_sleep(wduration); |
f120cc10 | 213 | for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) { |
f597a8b9 | 214 | urcu_mutex_unlock(&per_thread_lock[tidx].lock); |
0ee8bb0a | 215 | } |
bd252a04 | 216 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 217 | if (caa_unlikely(!test_duration_write())) |
0ee8bb0a | 218 | break; |
a0b7f7ea | 219 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 220 | loop_sleep(wdelay); |
0ee8bb0a MD |
221 | } |
222 | ||
94df6318 MD |
223 | printf_verbose("thread_end %s, tid %lu\n", |
224 | "writer", urcu_get_thread_id()); | |
bd252a04 | 225 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
0ee8bb0a MD |
226 | return ((void*)2); |
227 | } | |
228 | ||
61c3fb60 | 229 | static |
70469b43 | 230 | void show_usage(char **argv) |
0ee8bb0a | 231 | { |
06637138 MD |
232 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
233 | argv[0]); | |
234 | printf("OPTIONS:\n"); | |
06637138 MD |
235 | printf(" [-d delay] (writer period (us))\n"); |
236 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
237 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
238 | printf(" [-v] (verbose output)\n"); | |
239 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
0ee8bb0a MD |
240 | printf("\n"); |
241 | } | |
242 | ||
243 | int main(int argc, char **argv) | |
244 | { | |
245 | int err; | |
246 | pthread_t *tid_reader, *tid_writer; | |
247 | void *tret; | |
0ee8bb0a | 248 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 249 | int i, a; |
83e334d0 | 250 | unsigned int i_thr; |
0ee8bb0a MD |
251 | |
252 | if (argc < 4) { | |
70469b43 | 253 | show_usage(argv); |
0ee8bb0a MD |
254 | return -1; |
255 | } | |
5481ddb3 | 256 | cmm_smp_mb(); |
0ee8bb0a MD |
257 | |
258 | err = sscanf(argv[1], "%u", &nr_readers); | |
259 | if (err != 1) { | |
70469b43 | 260 | show_usage(argv); |
0ee8bb0a MD |
261 | return -1; |
262 | } | |
263 | ||
264 | err = sscanf(argv[2], "%u", &nr_writers); | |
265 | if (err != 1) { | |
70469b43 | 266 | show_usage(argv); |
0ee8bb0a MD |
267 | return -1; |
268 | } | |
83e334d0 | 269 | |
0ee8bb0a MD |
270 | err = sscanf(argv[3], "%lu", &duration); |
271 | if (err != 1) { | |
70469b43 | 272 | show_usage(argv); |
0ee8bb0a MD |
273 | return -1; |
274 | } | |
275 | ||
276 | for (i = 4; i < argc; i++) { | |
277 | if (argv[i][0] != '-') | |
278 | continue; | |
279 | switch (argv[i][1]) { | |
9e97e478 MD |
280 | case 'a': |
281 | if (argc < i + 2) { | |
70469b43 | 282 | show_usage(argv); |
9e97e478 MD |
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) { | |
70469b43 | 292 | show_usage(argv); |
8b632bab MD |
293 | return -1; |
294 | } | |
9e31d0f0 | 295 | rduration = atol(argv[++i]); |
8b632bab | 296 | break; |
0ee8bb0a MD |
297 | case 'd': |
298 | if (argc < i + 2) { | |
70469b43 | 299 | show_usage(argv); |
0ee8bb0a MD |
300 | return -1; |
301 | } | |
9e31d0f0 | 302 | wdelay = atol(argv[++i]); |
0ee8bb0a | 303 | break; |
31b598e0 MD |
304 | case 'e': |
305 | if (argc < i + 2) { | |
70469b43 | 306 | show_usage(argv); |
31b598e0 MD |
307 | return -1; |
308 | } | |
309 | wduration = atol(argv[++i]); | |
310 | break; | |
4bad7d45 MD |
311 | case 'v': |
312 | verbose_mode = 1; | |
313 | break; | |
0ee8bb0a MD |
314 | } |
315 | } | |
316 | ||
4bad7d45 | 317 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
0ee8bb0a | 318 | duration, nr_readers, nr_writers); |
9e31d0f0 | 319 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 320 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
321 | printf_verbose("thread %-6s, tid %lu\n", |
322 | "main", urcu_get_thread_id()); | |
0ee8bb0a | 323 | |
9aa14175 MD |
324 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
325 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
326 | tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads)); | |
327 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
328 | per_thread_lock = calloc(nr_readers, sizeof(*per_thread_lock)); | |
83e334d0 MJ |
329 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
330 | pthread_mutex_init(&per_thread_lock[i_thr].lock, NULL); | |
dee09338 | 331 | } |
0ee8bb0a | 332 | |
2a7ac59d MD |
333 | next_aff = 0; |
334 | ||
83e334d0 MJ |
335 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
336 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
337 | (void *)(long)i_thr); | |
0ee8bb0a MD |
338 | if (err != 0) |
339 | exit(1); | |
340 | } | |
83e334d0 MJ |
341 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
342 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
343 | (void *)(long)i_thr); | |
0ee8bb0a MD |
344 | if (err != 0) |
345 | exit(1); | |
346 | } | |
347 | ||
5481ddb3 | 348 | cmm_smp_mb(); |
0ee8bb0a | 349 | |
78efb485 MD |
350 | test_go = 1; |
351 | ||
352 | sleep(duration); | |
353 | ||
354 | test_stop = 1; | |
355 | ||
83e334d0 MJ |
356 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
357 | err = pthread_join(tid_reader[i_thr], &tret); | |
0ee8bb0a MD |
358 | if (err != 0) |
359 | exit(1); | |
83e334d0 | 360 | tot_reads += tot_nr_reads[i_thr]; |
0ee8bb0a | 361 | } |
83e334d0 MJ |
362 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
363 | err = pthread_join(tid_writer[i_thr], &tret); | |
0ee8bb0a MD |
364 | if (err != 0) |
365 | exit(1); | |
83e334d0 | 366 | tot_writes += tot_nr_writes[i_thr]; |
0ee8bb0a | 367 | } |
4bad7d45 MD |
368 | |
369 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
0ee8bb0a | 370 | tot_writes); |
a50a7b43 | 371 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 372 | "nr_writers %3u " |
9e31d0f0 | 373 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 374 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
375 | nr_writers, wdelay, tot_reads, tot_writes, |
376 | tot_reads + tot_writes); | |
377 | ||
0ee8bb0a MD |
378 | free(tid_reader); |
379 | free(tid_writer); | |
0ee8bb0a MD |
380 | free(tot_nr_reads); |
381 | free(tot_nr_writes); | |
382 | free(per_thread_lock); | |
383 | return 0; | |
384 | } |