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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 | ||
de10a585 | 5 | /* |
de10a585 | 6 | * Userspace RCU library - test program (with baatch reclamation) |
de10a585 MD |
7 | */ |
8 | ||
de10a585 MD |
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> | |
de10a585 MD |
17 | #include <errno.h> |
18 | ||
19 | #include <urcu/arch.h> | |
01477510 | 20 | #include <urcu/assert.h> |
bd252a04 | 21 | #include <urcu/tls-compat.h> |
94df6318 | 22 | #include "thread-id.h" |
2650042a | 23 | #include "../common/debug-yield.h" |
de10a585 MD |
24 | |
25 | /* hardcoded number of CPUs */ | |
26 | #define NR_CPUS 16384 | |
27 | ||
de10a585 MD |
28 | #define _LGPL_SOURCE |
29 | #include <urcu-qsbr.h> | |
30 | ||
31 | struct test_array { | |
32 | int a; | |
33 | }; | |
34 | ||
35 | static volatile int test_go, test_stop; | |
36 | ||
37 | static unsigned long wdelay; | |
38 | ||
39 | static struct test_array *test_rcu_pointer; | |
40 | ||
41 | static unsigned long duration; | |
42 | ||
43 | /* read-side C.S. duration, in loops */ | |
44 | static unsigned long rduration; | |
d266df35 | 45 | static long reclaim_batch = 1; |
de10a585 MD |
46 | |
47 | struct reclaim_queue { | |
48 | void **queue; /* Beginning of queue */ | |
49 | void **head; /* Insert position */ | |
50 | }; | |
51 | ||
52 | static struct reclaim_queue *pending_reclaims; | |
53 | ||
54 | ||
55 | /* write-side C.S. duration, in loops */ | |
56 | static unsigned long wduration; | |
57 | ||
ab0aacbe | 58 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 59 | { |
ab0aacbe | 60 | while (loops-- != 0) |
de10a585 MD |
61 | caa_cpu_relax(); |
62 | } | |
63 | ||
64 | static int verbose_mode; | |
65 | ||
66 | #define printf_verbose(fmt, args...) \ | |
67 | do { \ | |
68 | if (verbose_mode) \ | |
69 | printf(fmt, args); \ | |
70 | } while (0) | |
71 | ||
72 | static unsigned int cpu_affinities[NR_CPUS]; | |
73 | static unsigned int next_aff = 0; | |
74 | static int use_affinity = 0; | |
75 | ||
76 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
77 | ||
de10a585 MD |
78 | static void set_affinity(void) |
79 | { | |
2388c075 | 80 | #ifdef HAVE_SCHED_SETAFFINITY |
de10a585 | 81 | cpu_set_t mask; |
95bc7fb9 MD |
82 | int cpu, ret; |
83 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
84 | |
85 | if (!use_affinity) | |
86 | return; | |
87 | ||
2388c075 | 88 | #ifdef HAVE_SCHED_SETAFFINITY |
de10a585 MD |
89 | ret = pthread_mutex_lock(&affinity_mutex); |
90 | if (ret) { | |
91 | perror("Error in pthread mutex lock"); | |
92 | exit(-1); | |
93 | } | |
94 | cpu = cpu_affinities[next_aff++]; | |
95 | ret = pthread_mutex_unlock(&affinity_mutex); | |
96 | if (ret) { | |
97 | perror("Error in pthread mutex unlock"); | |
98 | exit(-1); | |
99 | } | |
100 | ||
101 | CPU_ZERO(&mask); | |
102 | CPU_SET(cpu, &mask); | |
de10a585 | 103 | sched_setaffinity(0, sizeof(mask), &mask); |
de10a585 MD |
104 | #endif /* HAVE_SCHED_SETAFFINITY */ |
105 | } | |
106 | ||
107 | /* | |
108 | * returns 0 if test should end. | |
109 | */ | |
110 | static int test_duration_write(void) | |
111 | { | |
112 | return !test_stop; | |
113 | } | |
114 | ||
115 | static int test_duration_read(void) | |
116 | { | |
117 | return !test_stop; | |
118 | } | |
119 | ||
bd252a04 MD |
120 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
121 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
122 | |
123 | static unsigned int nr_readers; | |
124 | static unsigned int nr_writers; | |
125 | ||
126 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
127 | static | |
128 | unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes; | |
129 | ||
61c3fb60 | 130 | static |
de10a585 MD |
131 | void *thr_reader(void *_count) |
132 | { | |
133 | unsigned long long *count = _count; | |
134 | struct test_array *local_ptr; | |
135 | ||
94df6318 MD |
136 | printf_verbose("thread_begin %s, tid %lu\n", |
137 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
138 | |
139 | set_affinity(); | |
140 | ||
141 | rcu_register_thread(); | |
142 | ||
143 | while (!test_go) | |
144 | { | |
145 | } | |
146 | cmm_smp_mb(); | |
147 | ||
148 | for (;;) { | |
149 | _rcu_read_lock(); | |
150 | local_ptr = _rcu_dereference(test_rcu_pointer); | |
1de4df4b | 151 | rcu_debug_yield_read(); |
de10a585 | 152 | if (local_ptr) |
01477510 | 153 | urcu_posix_assert(local_ptr->a == 8); |
a0b7f7ea | 154 | if (caa_unlikely(rduration)) |
de10a585 MD |
155 | loop_sleep(rduration); |
156 | _rcu_read_unlock(); | |
bd252a04 | 157 | URCU_TLS(nr_reads)++; |
de10a585 | 158 | /* QS each 1024 reads */ |
bd252a04 | 159 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 160 | _rcu_quiescent_state(); |
a0b7f7ea | 161 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
162 | break; |
163 | } | |
164 | ||
165 | rcu_unregister_thread(); | |
166 | ||
bd252a04 | 167 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
168 | printf_verbose("thread_end %s, tid %lu\n", |
169 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
170 | return ((void*)1); |
171 | ||
172 | } | |
173 | ||
174 | static void rcu_gc_clear_queue(unsigned long wtidx) | |
175 | { | |
176 | void **p; | |
177 | ||
178 | /* Wait for Q.S and empty queue */ | |
179 | synchronize_rcu(); | |
180 | ||
181 | for (p = pending_reclaims[wtidx].queue; | |
182 | p < pending_reclaims[wtidx].head; p++) { | |
183 | /* poison */ | |
184 | if (*p) | |
185 | ((struct test_array *)*p)->a = 0; | |
186 | free(*p); | |
187 | } | |
188 | pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue; | |
189 | } | |
190 | ||
191 | /* Using per-thread queue */ | |
192 | static void rcu_gc_reclaim(unsigned long wtidx, void *old) | |
193 | { | |
194 | /* Queue pointer */ | |
195 | *pending_reclaims[wtidx].head = old; | |
196 | pending_reclaims[wtidx].head++; | |
197 | ||
a0b7f7ea | 198 | if (caa_likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue |
de10a585 MD |
199 | < reclaim_batch)) |
200 | return; | |
201 | ||
202 | rcu_gc_clear_queue(wtidx); | |
203 | } | |
204 | ||
61c3fb60 | 205 | static |
de10a585 MD |
206 | void *thr_writer(void *data) |
207 | { | |
208 | unsigned long wtidx = (unsigned long)data; | |
209 | #ifdef TEST_LOCAL_GC | |
210 | struct test_array *old = NULL; | |
211 | #else | |
212 | struct test_array *new, *old; | |
213 | #endif | |
214 | ||
94df6318 MD |
215 | printf_verbose("thread_begin %s, tid %lu\n", |
216 | "writer", urcu_get_thread_id()); | |
de10a585 MD |
217 | |
218 | set_affinity(); | |
219 | ||
220 | while (!test_go) | |
221 | { | |
222 | } | |
223 | cmm_smp_mb(); | |
224 | ||
225 | for (;;) { | |
226 | #ifndef TEST_LOCAL_GC | |
227 | new = malloc(sizeof(*new)); | |
228 | new->a = 8; | |
229 | old = _rcu_xchg_pointer(&test_rcu_pointer, new); | |
230 | #endif | |
a0b7f7ea | 231 | if (caa_unlikely(wduration)) |
de10a585 MD |
232 | loop_sleep(wduration); |
233 | rcu_gc_reclaim(wtidx, old); | |
bd252a04 | 234 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 235 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 236 | break; |
a0b7f7ea | 237 | if (caa_unlikely(wdelay)) |
de10a585 MD |
238 | loop_sleep(wdelay); |
239 | } | |
240 | ||
94df6318 MD |
241 | printf_verbose("thread_end %s, tid %lu\n", |
242 | "writer", urcu_get_thread_id()); | |
bd252a04 | 243 | tot_nr_writes[wtidx] = URCU_TLS(nr_writes); |
de10a585 MD |
244 | return ((void*)2); |
245 | } | |
246 | ||
61c3fb60 | 247 | static |
70469b43 | 248 | void show_usage(char **argv) |
de10a585 | 249 | { |
06637138 MD |
250 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
251 | argv[0]); | |
252 | printf("OPTIONS:\n"); | |
06637138 | 253 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
254 | printf(" [-b batch] (batch reclaim)\n"); |
255 | printf(" [-d delay] (writer period (us))\n"); | |
256 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
257 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
258 | printf(" [-v] (verbose output)\n"); | |
259 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
de10a585 MD |
260 | printf("\n"); |
261 | } | |
262 | ||
263 | int main(int argc, char **argv) | |
264 | { | |
265 | int err; | |
266 | pthread_t *tid_reader, *tid_writer; | |
267 | void *tret; | |
268 | unsigned long long *count_reader; | |
269 | unsigned long long tot_reads = 0, tot_writes = 0; | |
270 | int i, a; | |
83e334d0 | 271 | unsigned int i_thr; |
de10a585 MD |
272 | |
273 | if (argc < 4) { | |
70469b43 | 274 | show_usage(argv); |
de10a585 MD |
275 | return -1; |
276 | } | |
277 | ||
278 | err = sscanf(argv[1], "%u", &nr_readers); | |
279 | if (err != 1) { | |
70469b43 | 280 | show_usage(argv); |
de10a585 MD |
281 | return -1; |
282 | } | |
283 | ||
284 | err = sscanf(argv[2], "%u", &nr_writers); | |
285 | if (err != 1) { | |
70469b43 | 286 | show_usage(argv); |
de10a585 MD |
287 | return -1; |
288 | } | |
83e334d0 | 289 | |
de10a585 MD |
290 | err = sscanf(argv[3], "%lu", &duration); |
291 | if (err != 1) { | |
70469b43 | 292 | show_usage(argv); |
de10a585 MD |
293 | return -1; |
294 | } | |
295 | ||
296 | for (i = 4; i < argc; i++) { | |
297 | if (argv[i][0] != '-') | |
298 | continue; | |
299 | switch (argv[i][1]) { | |
de10a585 | 300 | case 'r': |
2650042a | 301 | rcu_debug_yield_enable(RCU_YIELD_READ); |
de10a585 MD |
302 | break; |
303 | case 'w': | |
2650042a | 304 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
de10a585 | 305 | break; |
de10a585 MD |
306 | case 'a': |
307 | if (argc < i + 2) { | |
70469b43 | 308 | show_usage(argv); |
de10a585 MD |
309 | return -1; |
310 | } | |
311 | a = atoi(argv[++i]); | |
312 | cpu_affinities[next_aff++] = a; | |
313 | use_affinity = 1; | |
314 | printf_verbose("Adding CPU %d affinity\n", a); | |
315 | break; | |
316 | case 'b': | |
317 | if (argc < i + 2) { | |
70469b43 | 318 | show_usage(argv); |
de10a585 MD |
319 | return -1; |
320 | } | |
321 | reclaim_batch = atol(argv[++i]); | |
322 | break; | |
323 | case 'c': | |
324 | if (argc < i + 2) { | |
70469b43 | 325 | show_usage(argv); |
de10a585 MD |
326 | return -1; |
327 | } | |
328 | rduration = atol(argv[++i]); | |
329 | break; | |
330 | case 'd': | |
331 | if (argc < i + 2) { | |
70469b43 | 332 | show_usage(argv); |
de10a585 MD |
333 | return -1; |
334 | } | |
335 | wdelay = atol(argv[++i]); | |
336 | break; | |
337 | case 'e': | |
338 | if (argc < i + 2) { | |
70469b43 | 339 | show_usage(argv); |
de10a585 MD |
340 | return -1; |
341 | } | |
342 | wduration = atol(argv[++i]); | |
343 | break; | |
344 | case 'v': | |
345 | verbose_mode = 1; | |
346 | break; | |
347 | } | |
348 | } | |
349 | ||
350 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
351 | duration, nr_readers, nr_writers); | |
352 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
353 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
354 | printf_verbose("thread %-6s, tid %lu\n", |
355 | "main", urcu_get_thread_id()); | |
de10a585 | 356 | |
9aa14175 MD |
357 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
358 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
359 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
360 | tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes)); | |
361 | pending_reclaims = calloc(nr_writers, sizeof(*pending_reclaims)); | |
83e334d0 | 362 | if (reclaim_batch * sizeof(*pending_reclaims[0].queue) |
de10a585 | 363 | < CAA_CACHE_LINE_SIZE) |
83e334d0 MJ |
364 | for (i_thr = 0; i_thr < nr_writers; i_thr++) |
365 | pending_reclaims[i_thr].queue = calloc(1, CAA_CACHE_LINE_SIZE); | |
de10a585 | 366 | else |
83e334d0 MJ |
367 | for (i_thr = 0; i_thr < nr_writers; i_thr++) |
368 | pending_reclaims[i_thr].queue = calloc(reclaim_batch, | |
369 | sizeof(*pending_reclaims[i_thr].queue)); | |
370 | for (i_thr = 0; i_thr < nr_writers; i_thr++) | |
371 | pending_reclaims[i_thr].head = pending_reclaims[i_thr].queue; | |
de10a585 MD |
372 | |
373 | next_aff = 0; | |
374 | ||
83e334d0 MJ |
375 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
376 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
377 | &count_reader[i_thr]); | |
de10a585 MD |
378 | if (err != 0) |
379 | exit(1); | |
380 | } | |
83e334d0 MJ |
381 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
382 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
383 | (void *)(long)i_thr); | |
de10a585 MD |
384 | if (err != 0) |
385 | exit(1); | |
386 | } | |
387 | ||
388 | cmm_smp_mb(); | |
389 | ||
390 | test_go = 1; | |
391 | ||
392 | sleep(duration); | |
393 | ||
394 | test_stop = 1; | |
395 | ||
83e334d0 MJ |
396 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
397 | err = pthread_join(tid_reader[i_thr], &tret); | |
de10a585 MD |
398 | if (err != 0) |
399 | exit(1); | |
83e334d0 | 400 | tot_reads += count_reader[i_thr]; |
de10a585 | 401 | } |
83e334d0 MJ |
402 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
403 | err = pthread_join(tid_writer[i_thr], &tret); | |
de10a585 MD |
404 | if (err != 0) |
405 | exit(1); | |
83e334d0 MJ |
406 | tot_writes += tot_nr_writes[i_thr]; |
407 | rcu_gc_clear_queue(i_thr); | |
de10a585 | 408 | } |
83e334d0 | 409 | |
de10a585 MD |
410 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
411 | tot_writes); | |
412 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
413 | "nr_writers %3u " | |
414 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu " | |
d266df35 | 415 | "batch %ld\n", |
de10a585 MD |
416 | argv[0], duration, nr_readers, rduration, wduration, |
417 | nr_writers, wdelay, tot_reads, tot_writes, | |
418 | tot_reads + tot_writes, reclaim_batch); | |
83e334d0 | 419 | |
de10a585 MD |
420 | free(tid_reader); |
421 | free(tid_writer); | |
422 | free(count_reader); | |
423 | free(tot_nr_writes); | |
83e334d0 MJ |
424 | |
425 | for (i_thr = 0; i_thr < nr_writers; i_thr++) | |
426 | free(pending_reclaims[i_thr].queue); | |
de10a585 MD |
427 | free(pending_reclaims); |
428 | ||
429 | return 0; | |
430 | } |