Commit | Line | Data |
---|---|---|
9d6dbe1b GU |
1 | /* |
2 | * Resizable, Scalable, Concurrent Hash Table | |
3 | * | |
1aa661f5 | 4 | * Copyright (c) 2014-2015 Thomas Graf <tgraf@suug.ch> |
9d6dbe1b GU |
5 | * Copyright (c) 2008-2014 Patrick McHardy <kaber@trash.net> |
6 | * | |
9d6dbe1b GU |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | /************************************************************************** | |
13 | * Self Test | |
14 | **************************************************************************/ | |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/jhash.h> | |
18 | #include <linux/kernel.h> | |
f4a3e90b | 19 | #include <linux/kthread.h> |
9d6dbe1b GU |
20 | #include <linux/module.h> |
21 | #include <linux/rcupdate.h> | |
22 | #include <linux/rhashtable.h> | |
f4a3e90b | 23 | #include <linux/semaphore.h> |
9d6dbe1b | 24 | #include <linux/slab.h> |
685a015e | 25 | #include <linux/sched.h> |
cdd4de37 | 26 | #include <linux/random.h> |
f4a3e90b | 27 | #include <linux/vmalloc.h> |
9d6dbe1b | 28 | |
1aa661f5 | 29 | #define MAX_ENTRIES 1000000 |
67b7cbf4 | 30 | #define TEST_INSERT_FAIL INT_MAX |
1aa661f5 | 31 | |
f651616e FW |
32 | static int parm_entries = 50000; |
33 | module_param(parm_entries, int, 0); | |
34 | MODULE_PARM_DESC(parm_entries, "Number of entries to add (default: 50000)"); | |
1aa661f5 TG |
35 | |
36 | static int runs = 4; | |
37 | module_param(runs, int, 0); | |
38 | MODULE_PARM_DESC(runs, "Number of test runs per variant (default: 4)"); | |
39 | ||
95e435af | 40 | static int max_size = 0; |
1aa661f5 | 41 | module_param(max_size, int, 0); |
3b3bf80b | 42 | MODULE_PARM_DESC(max_size, "Maximum table size (default: calculated)"); |
1aa661f5 TG |
43 | |
44 | static bool shrinking = false; | |
45 | module_param(shrinking, bool, 0); | |
46 | MODULE_PARM_DESC(shrinking, "Enable automatic shrinking (default: off)"); | |
47 | ||
48 | static int size = 8; | |
49 | module_param(size, int, 0); | |
50 | MODULE_PARM_DESC(size, "Initial size hint of table (default: 8)"); | |
9d6dbe1b | 51 | |
f4a3e90b PS |
52 | static int tcount = 10; |
53 | module_param(tcount, int, 0); | |
54 | MODULE_PARM_DESC(tcount, "Number of threads to spawn (default: 10)"); | |
55 | ||
d662e037 PS |
56 | static bool enomem_retry = false; |
57 | module_param(enomem_retry, bool, 0); | |
58 | MODULE_PARM_DESC(enomem_retry, "Retry insert even if -ENOMEM was returned (default: off)"); | |
59 | ||
e859afe1 PS |
60 | struct test_obj_val { |
61 | int id; | |
62 | int tid; | |
63 | }; | |
64 | ||
9d6dbe1b | 65 | struct test_obj { |
e859afe1 | 66 | struct test_obj_val value; |
9d6dbe1b GU |
67 | struct rhash_head node; |
68 | }; | |
69 | ||
cdd4de37 FW |
70 | struct test_obj_rhl { |
71 | struct test_obj_val value; | |
72 | struct rhlist_head list_node; | |
73 | }; | |
74 | ||
f4a3e90b | 75 | struct thread_data { |
f651616e | 76 | unsigned int entries; |
f4a3e90b PS |
77 | int id; |
78 | struct task_struct *task; | |
79 | struct test_obj *objs; | |
80 | }; | |
81 | ||
499ac3b6 PB |
82 | static u32 my_hashfn(const void *data, u32 len, u32 seed) |
83 | { | |
84 | const struct test_obj_rhl *obj = data; | |
85 | ||
86 | return (obj->value.id % 10) << RHT_HASH_RESERVED_SPACE; | |
87 | } | |
88 | ||
89 | static int my_cmpfn(struct rhashtable_compare_arg *arg, const void *obj) | |
90 | { | |
91 | const struct test_obj_rhl *test_obj = obj; | |
92 | const struct test_obj_val *val = arg->key; | |
93 | ||
94 | return test_obj->value.id - val->id; | |
95 | } | |
96 | ||
1aa661f5 | 97 | static struct rhashtable_params test_rht_params = { |
b182aa6e HX |
98 | .head_offset = offsetof(struct test_obj, node), |
99 | .key_offset = offsetof(struct test_obj, value), | |
e859afe1 | 100 | .key_len = sizeof(struct test_obj_val), |
b182aa6e | 101 | .hashfn = jhash, |
b182aa6e HX |
102 | .nulls_base = (3U << RHT_BASE_SHIFT), |
103 | }; | |
104 | ||
499ac3b6 PB |
105 | static struct rhashtable_params test_rht_params_dup = { |
106 | .head_offset = offsetof(struct test_obj_rhl, list_node), | |
107 | .key_offset = offsetof(struct test_obj_rhl, value), | |
108 | .key_len = sizeof(struct test_obj_val), | |
109 | .hashfn = jhash, | |
110 | .obj_hashfn = my_hashfn, | |
111 | .obj_cmpfn = my_cmpfn, | |
112 | .nelem_hint = 128, | |
113 | .automatic_shrinking = false, | |
114 | }; | |
115 | ||
f4a3e90b PS |
116 | static struct semaphore prestart_sem; |
117 | static struct semaphore startup_sem = __SEMAPHORE_INITIALIZER(startup_sem, 0); | |
118 | ||
7e936bd7 | 119 | static int insert_retry(struct rhashtable *ht, struct test_obj *obj, |
9e9089e5 PS |
120 | const struct rhashtable_params params) |
121 | { | |
d662e037 | 122 | int err, retries = -1, enomem_retries = 0; |
9e9089e5 PS |
123 | |
124 | do { | |
125 | retries++; | |
126 | cond_resched(); | |
7e936bd7 | 127 | err = rhashtable_insert_fast(ht, &obj->node, params); |
d662e037 PS |
128 | if (err == -ENOMEM && enomem_retry) { |
129 | enomem_retries++; | |
130 | err = -EBUSY; | |
131 | } | |
9e9089e5 PS |
132 | } while (err == -EBUSY); |
133 | ||
d662e037 PS |
134 | if (enomem_retries) |
135 | pr_info(" %u insertions retried after -ENOMEM\n", | |
136 | enomem_retries); | |
137 | ||
9e9089e5 PS |
138 | return err ? : retries; |
139 | } | |
140 | ||
f651616e FW |
141 | static int __init test_rht_lookup(struct rhashtable *ht, struct test_obj *array, |
142 | unsigned int entries) | |
9d6dbe1b GU |
143 | { |
144 | unsigned int i; | |
145 | ||
f651616e | 146 | for (i = 0; i < entries; i++) { |
9d6dbe1b GU |
147 | struct test_obj *obj; |
148 | bool expected = !(i % 2); | |
e859afe1 PS |
149 | struct test_obj_val key = { |
150 | .id = i, | |
151 | }; | |
9d6dbe1b | 152 | |
e859afe1 | 153 | if (array[i / 2].value.id == TEST_INSERT_FAIL) |
67b7cbf4 TG |
154 | expected = false; |
155 | ||
b182aa6e | 156 | obj = rhashtable_lookup_fast(ht, &key, test_rht_params); |
9d6dbe1b GU |
157 | |
158 | if (expected && !obj) { | |
e859afe1 | 159 | pr_warn("Test failed: Could not find key %u\n", key.id); |
9d6dbe1b GU |
160 | return -ENOENT; |
161 | } else if (!expected && obj) { | |
162 | pr_warn("Test failed: Unexpected entry found for key %u\n", | |
e859afe1 | 163 | key.id); |
9d6dbe1b GU |
164 | return -EEXIST; |
165 | } else if (expected && obj) { | |
e859afe1 | 166 | if (obj->value.id != i) { |
c2c8a901 | 167 | pr_warn("Test failed: Lookup value mismatch %u!=%u\n", |
e859afe1 | 168 | obj->value.id, i); |
9d6dbe1b GU |
169 | return -EINVAL; |
170 | } | |
171 | } | |
685a015e TG |
172 | |
173 | cond_resched_rcu(); | |
9d6dbe1b GU |
174 | } |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
f651616e | 179 | static void test_bucket_stats(struct rhashtable *ht, unsigned int entries) |
9d6dbe1b | 180 | { |
246b23a7 TG |
181 | unsigned int err, total = 0, chain_len = 0; |
182 | struct rhashtable_iter hti; | |
9d6dbe1b | 183 | struct rhash_head *pos; |
9d6dbe1b | 184 | |
8f6fd83c | 185 | err = rhashtable_walk_init(ht, &hti, GFP_KERNEL); |
246b23a7 TG |
186 | if (err) { |
187 | pr_warn("Test failed: allocation error"); | |
188 | return; | |
189 | } | |
9d6dbe1b | 190 | |
97a6ec4a | 191 | rhashtable_walk_start(&hti); |
9d6dbe1b | 192 | |
246b23a7 TG |
193 | while ((pos = rhashtable_walk_next(&hti))) { |
194 | if (PTR_ERR(pos) == -EAGAIN) { | |
195 | pr_info("Info: encountered resize\n"); | |
196 | chain_len++; | |
197 | continue; | |
198 | } else if (IS_ERR(pos)) { | |
199 | pr_warn("Test failed: rhashtable_walk_next() error: %ld\n", | |
200 | PTR_ERR(pos)); | |
201 | break; | |
9d6dbe1b GU |
202 | } |
203 | ||
246b23a7 | 204 | total++; |
9d6dbe1b GU |
205 | } |
206 | ||
246b23a7 TG |
207 | rhashtable_walk_stop(&hti); |
208 | rhashtable_walk_exit(&hti); | |
209 | ||
210 | pr_info(" Traversal complete: counted=%u, nelems=%u, entries=%d, table-jumps=%u\n", | |
211 | total, atomic_read(&ht->nelems), entries, chain_len); | |
9d6dbe1b | 212 | |
1aa661f5 | 213 | if (total != atomic_read(&ht->nelems) || total != entries) |
9d6dbe1b GU |
214 | pr_warn("Test failed: Total count mismatch ^^^"); |
215 | } | |
216 | ||
f651616e FW |
217 | static s64 __init test_rhashtable(struct rhashtable *ht, struct test_obj *array, |
218 | unsigned int entries) | |
9d6dbe1b | 219 | { |
9d6dbe1b | 220 | struct test_obj *obj; |
9d6dbe1b | 221 | int err; |
9e9089e5 | 222 | unsigned int i, insert_retries = 0; |
1aa661f5 | 223 | s64 start, end; |
9d6dbe1b GU |
224 | |
225 | /* | |
226 | * Insertion Test: | |
1aa661f5 | 227 | * Insert entries into table with all keys even numbers |
9d6dbe1b | 228 | */ |
1aa661f5 TG |
229 | pr_info(" Adding %d keys\n", entries); |
230 | start = ktime_get_ns(); | |
231 | for (i = 0; i < entries; i++) { | |
fcc57020 | 232 | struct test_obj *obj = &array[i]; |
9d6dbe1b | 233 | |
e859afe1 | 234 | obj->value.id = i * 2; |
7e936bd7 | 235 | err = insert_retry(ht, obj, test_rht_params); |
9e9089e5 PS |
236 | if (err > 0) |
237 | insert_retries += err; | |
238 | else if (err) | |
fcc57020 | 239 | return err; |
9d6dbe1b GU |
240 | } |
241 | ||
9e9089e5 PS |
242 | if (insert_retries) |
243 | pr_info(" %u insertions retried due to memory pressure\n", | |
244 | insert_retries); | |
67b7cbf4 | 245 | |
f651616e | 246 | test_bucket_stats(ht, entries); |
9d6dbe1b | 247 | rcu_read_lock(); |
f651616e | 248 | test_rht_lookup(ht, array, entries); |
9d6dbe1b GU |
249 | rcu_read_unlock(); |
250 | ||
f651616e | 251 | test_bucket_stats(ht, entries); |
9d6dbe1b | 252 | |
1aa661f5 TG |
253 | pr_info(" Deleting %d keys\n", entries); |
254 | for (i = 0; i < entries; i++) { | |
78369255 PS |
255 | struct test_obj_val key = { |
256 | .id = i * 2, | |
257 | }; | |
9d6dbe1b | 258 | |
e859afe1 | 259 | if (array[i].value.id != TEST_INSERT_FAIL) { |
67b7cbf4 TG |
260 | obj = rhashtable_lookup_fast(ht, &key, test_rht_params); |
261 | BUG_ON(!obj); | |
9d6dbe1b | 262 | |
67b7cbf4 TG |
263 | rhashtable_remove_fast(ht, &obj->node, test_rht_params); |
264 | } | |
685a015e TG |
265 | |
266 | cond_resched(); | |
9d6dbe1b GU |
267 | } |
268 | ||
1aa661f5 TG |
269 | end = ktime_get_ns(); |
270 | pr_info(" Duration of test: %lld ns\n", end - start); | |
271 | ||
272 | return end - start; | |
9d6dbe1b GU |
273 | } |
274 | ||
b7f5e5c7 | 275 | static struct rhashtable ht; |
411d788a | 276 | static struct rhltable rhlt; |
cdd4de37 FW |
277 | |
278 | static int __init test_rhltable(unsigned int entries) | |
279 | { | |
280 | struct test_obj_rhl *rhl_test_objects; | |
281 | unsigned long *obj_in_table; | |
282 | unsigned int i, j, k; | |
283 | int ret, err; | |
284 | ||
285 | if (entries == 0) | |
286 | entries = 1; | |
287 | ||
fad953ce KC |
288 | rhl_test_objects = vzalloc(array_size(entries, |
289 | sizeof(*rhl_test_objects))); | |
cdd4de37 FW |
290 | if (!rhl_test_objects) |
291 | return -ENOMEM; | |
292 | ||
293 | ret = -ENOMEM; | |
fad953ce KC |
294 | obj_in_table = vzalloc(array_size(sizeof(unsigned long), |
295 | BITS_TO_LONGS(entries))); | |
cdd4de37 FW |
296 | if (!obj_in_table) |
297 | goto out_free; | |
298 | ||
299 | /* nulls_base not supported in rhlist interface */ | |
300 | test_rht_params.nulls_base = 0; | |
301 | err = rhltable_init(&rhlt, &test_rht_params); | |
302 | if (WARN_ON(err)) | |
303 | goto out_free; | |
304 | ||
305 | k = prandom_u32(); | |
306 | ret = 0; | |
307 | for (i = 0; i < entries; i++) { | |
308 | rhl_test_objects[i].value.id = k; | |
309 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, | |
310 | test_rht_params); | |
311 | if (WARN(err, "error %d on element %d\n", err, i)) | |
312 | break; | |
313 | if (err == 0) | |
314 | set_bit(i, obj_in_table); | |
315 | } | |
316 | ||
317 | if (err) | |
318 | ret = err; | |
319 | ||
320 | pr_info("test %d add/delete pairs into rhlist\n", entries); | |
321 | for (i = 0; i < entries; i++) { | |
322 | struct rhlist_head *h, *pos; | |
323 | struct test_obj_rhl *obj; | |
324 | struct test_obj_val key = { | |
325 | .id = k, | |
326 | }; | |
327 | bool found; | |
328 | ||
329 | rcu_read_lock(); | |
330 | h = rhltable_lookup(&rhlt, &key, test_rht_params); | |
331 | if (WARN(!h, "key not found during iteration %d of %d", i, entries)) { | |
332 | rcu_read_unlock(); | |
333 | break; | |
334 | } | |
335 | ||
336 | if (i) { | |
337 | j = i - 1; | |
338 | rhl_for_each_entry_rcu(obj, pos, h, list_node) { | |
339 | if (WARN(pos == &rhl_test_objects[j].list_node, "old element found, should be gone")) | |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | cond_resched_rcu(); | |
345 | ||
346 | found = false; | |
347 | ||
348 | rhl_for_each_entry_rcu(obj, pos, h, list_node) { | |
349 | if (pos == &rhl_test_objects[i].list_node) { | |
350 | found = true; | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | rcu_read_unlock(); | |
356 | ||
357 | if (WARN(!found, "element %d not found", i)) | |
358 | break; | |
359 | ||
360 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
361 | WARN(err, "rhltable_remove: err %d for iteration %d\n", err, i); | |
362 | if (err == 0) | |
363 | clear_bit(i, obj_in_table); | |
364 | } | |
365 | ||
366 | if (ret == 0 && err) | |
367 | ret = err; | |
368 | ||
369 | for (i = 0; i < entries; i++) { | |
370 | WARN(test_bit(i, obj_in_table), "elem %d allegedly still present", i); | |
371 | ||
372 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, | |
373 | test_rht_params); | |
374 | if (WARN(err, "error %d on element %d\n", err, i)) | |
375 | break; | |
376 | if (err == 0) | |
377 | set_bit(i, obj_in_table); | |
378 | } | |
379 | ||
380 | pr_info("test %d random rhlist add/delete operations\n", entries); | |
381 | for (j = 0; j < entries; j++) { | |
382 | u32 i = prandom_u32_max(entries); | |
383 | u32 prand = prandom_u32(); | |
384 | ||
385 | cond_resched(); | |
386 | ||
387 | if (prand == 0) | |
388 | prand = prandom_u32(); | |
389 | ||
390 | if (prand & 1) { | |
391 | prand >>= 1; | |
392 | continue; | |
393 | } | |
394 | ||
395 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
396 | if (test_bit(i, obj_in_table)) { | |
397 | clear_bit(i, obj_in_table); | |
398 | if (WARN(err, "cannot remove element at slot %d", i)) | |
399 | continue; | |
400 | } else { | |
401 | if (WARN(err != -ENOENT, "removed non-existant element %d, error %d not %d", | |
402 | i, err, -ENOENT)) | |
403 | continue; | |
404 | } | |
405 | ||
406 | if (prand & 1) { | |
407 | prand >>= 1; | |
408 | continue; | |
409 | } | |
410 | ||
411 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
412 | if (err == 0) { | |
413 | if (WARN(test_and_set_bit(i, obj_in_table), "succeeded to insert same object %d", i)) | |
414 | continue; | |
415 | } else { | |
416 | if (WARN(!test_bit(i, obj_in_table), "failed to insert object %d", i)) | |
417 | continue; | |
418 | } | |
419 | ||
420 | if (prand & 1) { | |
421 | prand >>= 1; | |
422 | continue; | |
423 | } | |
424 | ||
425 | i = prandom_u32_max(entries); | |
426 | if (test_bit(i, obj_in_table)) { | |
427 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
428 | WARN(err, "cannot remove element at slot %d", i); | |
429 | if (err == 0) | |
430 | clear_bit(i, obj_in_table); | |
431 | } else { | |
432 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
433 | WARN(err, "failed to insert object %d", i); | |
434 | if (err == 0) | |
435 | set_bit(i, obj_in_table); | |
436 | } | |
437 | } | |
438 | ||
439 | for (i = 0; i < entries; i++) { | |
440 | cond_resched(); | |
441 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
442 | if (test_bit(i, obj_in_table)) { | |
443 | if (WARN(err, "cannot remove element at slot %d", i)) | |
444 | continue; | |
445 | } else { | |
446 | if (WARN(err != -ENOENT, "removed non-existant element, error %d not %d", | |
447 | err, -ENOENT)) | |
448 | continue; | |
449 | } | |
450 | } | |
451 | ||
452 | rhltable_destroy(&rhlt); | |
453 | out_free: | |
454 | vfree(rhl_test_objects); | |
455 | vfree(obj_in_table); | |
456 | return ret; | |
457 | } | |
b7f5e5c7 | 458 | |
a6359bd8 FW |
459 | static int __init test_rhashtable_max(struct test_obj *array, |
460 | unsigned int entries) | |
461 | { | |
462 | unsigned int i, insert_retries = 0; | |
463 | int err; | |
464 | ||
465 | test_rht_params.max_size = roundup_pow_of_two(entries / 8); | |
466 | err = rhashtable_init(&ht, &test_rht_params); | |
467 | if (err) | |
468 | return err; | |
469 | ||
470 | for (i = 0; i < ht.max_elems; i++) { | |
471 | struct test_obj *obj = &array[i]; | |
472 | ||
473 | obj->value.id = i * 2; | |
474 | err = insert_retry(&ht, obj, test_rht_params); | |
475 | if (err > 0) | |
476 | insert_retries += err; | |
477 | else if (err) | |
478 | return err; | |
479 | } | |
480 | ||
481 | err = insert_retry(&ht, &array[ht.max_elems], test_rht_params); | |
482 | if (err == -E2BIG) { | |
483 | err = 0; | |
484 | } else { | |
485 | pr_info("insert element %u should have failed with %d, got %d\n", | |
486 | ht.max_elems, -E2BIG, err); | |
487 | if (err == 0) | |
488 | err = -1; | |
489 | } | |
490 | ||
491 | rhashtable_destroy(&ht); | |
492 | ||
493 | return err; | |
494 | } | |
495 | ||
499ac3b6 PB |
496 | static unsigned int __init print_ht(struct rhltable *rhlt) |
497 | { | |
498 | struct rhashtable *ht; | |
499 | const struct bucket_table *tbl; | |
500 | char buff[512] = ""; | |
501 | unsigned int i, cnt = 0; | |
502 | ||
503 | ht = &rhlt->ht; | |
504 | tbl = rht_dereference(ht->tbl, ht); | |
505 | for (i = 0; i < tbl->size; i++) { | |
506 | struct rhash_head *pos, *next; | |
507 | struct test_obj_rhl *p; | |
508 | ||
509 | pos = rht_dereference(tbl->buckets[i], ht); | |
510 | next = !rht_is_a_nulls(pos) ? rht_dereference(pos->next, ht) : NULL; | |
511 | ||
512 | if (!rht_is_a_nulls(pos)) { | |
513 | sprintf(buff, "%s\nbucket[%d] -> ", buff, i); | |
514 | } | |
515 | ||
516 | while (!rht_is_a_nulls(pos)) { | |
517 | struct rhlist_head *list = container_of(pos, struct rhlist_head, rhead); | |
518 | sprintf(buff, "%s[[", buff); | |
519 | do { | |
520 | pos = &list->rhead; | |
521 | list = rht_dereference(list->next, ht); | |
522 | p = rht_obj(ht, pos); | |
523 | ||
524 | sprintf(buff, "%s val %d (tid=%d)%s", buff, p->value.id, p->value.tid, | |
525 | list? ", " : " "); | |
526 | cnt++; | |
527 | } while (list); | |
528 | ||
529 | pos = next, | |
530 | next = !rht_is_a_nulls(pos) ? | |
531 | rht_dereference(pos->next, ht) : NULL; | |
532 | ||
533 | sprintf(buff, "%s]]%s", buff, !rht_is_a_nulls(pos) ? " -> " : ""); | |
534 | } | |
535 | } | |
536 | printk(KERN_ERR "\n---- ht: ----%s\n-------------\n", buff); | |
537 | ||
538 | return cnt; | |
539 | } | |
540 | ||
541 | static int __init test_insert_dup(struct test_obj_rhl *rhl_test_objects, | |
542 | int cnt, bool slow) | |
543 | { | |
544 | struct rhltable rhlt; | |
545 | unsigned int i, ret; | |
546 | const char *key; | |
547 | int err = 0; | |
548 | ||
549 | err = rhltable_init(&rhlt, &test_rht_params_dup); | |
550 | if (WARN_ON(err)) | |
551 | return err; | |
552 | ||
553 | for (i = 0; i < cnt; i++) { | |
554 | rhl_test_objects[i].value.tid = i; | |
555 | key = rht_obj(&rhlt.ht, &rhl_test_objects[i].list_node.rhead); | |
556 | key += test_rht_params_dup.key_offset; | |
557 | ||
558 | if (slow) { | |
559 | err = PTR_ERR(rhashtable_insert_slow(&rhlt.ht, key, | |
560 | &rhl_test_objects[i].list_node.rhead)); | |
561 | if (err == -EAGAIN) | |
562 | err = 0; | |
563 | } else | |
564 | err = rhltable_insert(&rhlt, | |
565 | &rhl_test_objects[i].list_node, | |
566 | test_rht_params_dup); | |
567 | if (WARN(err, "error %d on element %d/%d (%s)\n", err, i, cnt, slow? "slow" : "fast")) | |
568 | goto skip_print; | |
569 | } | |
570 | ||
571 | ret = print_ht(&rhlt); | |
572 | WARN(ret != cnt, "missing rhltable elements (%d != %d, %s)\n", ret, cnt, slow? "slow" : "fast"); | |
573 | ||
574 | skip_print: | |
575 | rhltable_destroy(&rhlt); | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static int __init test_insert_duplicates_run(void) | |
581 | { | |
582 | struct test_obj_rhl rhl_test_objects[3] = {}; | |
583 | ||
584 | pr_info("test inserting duplicates\n"); | |
585 | ||
586 | /* two different values that map to same bucket */ | |
587 | rhl_test_objects[0].value.id = 1; | |
588 | rhl_test_objects[1].value.id = 21; | |
589 | ||
590 | /* and another duplicate with same as [0] value | |
591 | * which will be second on the bucket list */ | |
592 | rhl_test_objects[2].value.id = rhl_test_objects[0].value.id; | |
593 | ||
594 | test_insert_dup(rhl_test_objects, 2, false); | |
595 | test_insert_dup(rhl_test_objects, 3, false); | |
596 | test_insert_dup(rhl_test_objects, 2, true); | |
597 | test_insert_dup(rhl_test_objects, 3, true); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
f4a3e90b PS |
602 | static int thread_lookup_test(struct thread_data *tdata) |
603 | { | |
f651616e | 604 | unsigned int entries = tdata->entries; |
f4a3e90b PS |
605 | int i, err = 0; |
606 | ||
607 | for (i = 0; i < entries; i++) { | |
608 | struct test_obj *obj; | |
e859afe1 PS |
609 | struct test_obj_val key = { |
610 | .id = i, | |
611 | .tid = tdata->id, | |
612 | }; | |
f4a3e90b PS |
613 | |
614 | obj = rhashtable_lookup_fast(&ht, &key, test_rht_params); | |
e859afe1 PS |
615 | if (obj && (tdata->objs[i].value.id == TEST_INSERT_FAIL)) { |
616 | pr_err(" found unexpected object %d-%d\n", key.tid, key.id); | |
f4a3e90b | 617 | err++; |
e859afe1 PS |
618 | } else if (!obj && (tdata->objs[i].value.id != TEST_INSERT_FAIL)) { |
619 | pr_err(" object %d-%d not found!\n", key.tid, key.id); | |
f4a3e90b | 620 | err++; |
e859afe1 PS |
621 | } else if (obj && memcmp(&obj->value, &key, sizeof(key))) { |
622 | pr_err(" wrong object returned (got %d-%d, expected %d-%d)\n", | |
623 | obj->value.tid, obj->value.id, key.tid, key.id); | |
f4a3e90b PS |
624 | err++; |
625 | } | |
cd5b318d PS |
626 | |
627 | cond_resched(); | |
f4a3e90b PS |
628 | } |
629 | return err; | |
630 | } | |
631 | ||
632 | static int threadfunc(void *data) | |
633 | { | |
9e9089e5 | 634 | int i, step, err = 0, insert_retries = 0; |
f4a3e90b PS |
635 | struct thread_data *tdata = data; |
636 | ||
637 | up(&prestart_sem); | |
638 | if (down_interruptible(&startup_sem)) | |
639 | pr_err(" thread[%d]: down_interruptible failed\n", tdata->id); | |
640 | ||
f651616e | 641 | for (i = 0; i < tdata->entries; i++) { |
e859afe1 PS |
642 | tdata->objs[i].value.id = i; |
643 | tdata->objs[i].value.tid = tdata->id; | |
7e936bd7 | 644 | err = insert_retry(&ht, &tdata->objs[i], test_rht_params); |
9e9089e5 PS |
645 | if (err > 0) { |
646 | insert_retries += err; | |
f4a3e90b PS |
647 | } else if (err) { |
648 | pr_err(" thread[%d]: rhashtable_insert_fast failed\n", | |
649 | tdata->id); | |
650 | goto out; | |
651 | } | |
652 | } | |
9e9089e5 PS |
653 | if (insert_retries) |
654 | pr_info(" thread[%d]: %u insertions retried due to memory pressure\n", | |
655 | tdata->id, insert_retries); | |
f4a3e90b PS |
656 | |
657 | err = thread_lookup_test(tdata); | |
658 | if (err) { | |
659 | pr_err(" thread[%d]: rhashtable_lookup_test failed\n", | |
660 | tdata->id); | |
661 | goto out; | |
662 | } | |
663 | ||
664 | for (step = 10; step > 0; step--) { | |
f651616e | 665 | for (i = 0; i < tdata->entries; i += step) { |
e859afe1 | 666 | if (tdata->objs[i].value.id == TEST_INSERT_FAIL) |
f4a3e90b PS |
667 | continue; |
668 | err = rhashtable_remove_fast(&ht, &tdata->objs[i].node, | |
669 | test_rht_params); | |
670 | if (err) { | |
671 | pr_err(" thread[%d]: rhashtable_remove_fast failed\n", | |
672 | tdata->id); | |
673 | goto out; | |
674 | } | |
e859afe1 | 675 | tdata->objs[i].value.id = TEST_INSERT_FAIL; |
cd5b318d PS |
676 | |
677 | cond_resched(); | |
f4a3e90b PS |
678 | } |
679 | err = thread_lookup_test(tdata); | |
680 | if (err) { | |
681 | pr_err(" thread[%d]: rhashtable_lookup_test (2) failed\n", | |
682 | tdata->id); | |
683 | goto out; | |
684 | } | |
685 | } | |
686 | out: | |
687 | while (!kthread_should_stop()) { | |
688 | set_current_state(TASK_INTERRUPTIBLE); | |
689 | schedule(); | |
690 | } | |
691 | return err; | |
692 | } | |
693 | ||
9d6dbe1b GU |
694 | static int __init test_rht_init(void) |
695 | { | |
f651616e | 696 | unsigned int entries; |
f4a3e90b | 697 | int i, err, started_threads = 0, failed_threads = 0; |
1aa661f5 | 698 | u64 total_time = 0; |
f4a3e90b PS |
699 | struct thread_data *tdata; |
700 | struct test_obj *objs; | |
9d6dbe1b | 701 | |
f651616e FW |
702 | if (parm_entries < 0) |
703 | parm_entries = 1; | |
704 | ||
705 | entries = min(parm_entries, MAX_ENTRIES); | |
9d6dbe1b | 706 | |
1aa661f5 | 707 | test_rht_params.automatic_shrinking = shrinking; |
95e435af | 708 | test_rht_params.max_size = max_size ? : roundup_pow_of_two(entries); |
1aa661f5 | 709 | test_rht_params.nelem_hint = size; |
9d6dbe1b | 710 | |
fad953ce KC |
711 | objs = vzalloc(array_size(sizeof(struct test_obj), |
712 | test_rht_params.max_size + 1)); | |
7e936bd7 FW |
713 | if (!objs) |
714 | return -ENOMEM; | |
715 | ||
1aa661f5 TG |
716 | pr_info("Running rhashtable test nelem=%d, max_size=%d, shrinking=%d\n", |
717 | size, max_size, shrinking); | |
9d6dbe1b | 718 | |
1aa661f5 TG |
719 | for (i = 0; i < runs; i++) { |
720 | s64 time; | |
9d6dbe1b | 721 | |
1aa661f5 | 722 | pr_info("Test %02d:\n", i); |
7e936bd7 FW |
723 | memset(objs, 0, test_rht_params.max_size * sizeof(struct test_obj)); |
724 | ||
1aa661f5 TG |
725 | err = rhashtable_init(&ht, &test_rht_params); |
726 | if (err < 0) { | |
727 | pr_warn("Test failed: Unable to initialize hashtable: %d\n", | |
728 | err); | |
729 | continue; | |
730 | } | |
731 | ||
f651616e | 732 | time = test_rhashtable(&ht, objs, entries); |
1aa661f5 TG |
733 | rhashtable_destroy(&ht); |
734 | if (time < 0) { | |
7e936bd7 | 735 | vfree(objs); |
1aa661f5 TG |
736 | pr_warn("Test failed: return code %lld\n", time); |
737 | return -EINVAL; | |
738 | } | |
739 | ||
740 | total_time += time; | |
741 | } | |
742 | ||
a6359bd8 FW |
743 | pr_info("test if its possible to exceed max_size %d: %s\n", |
744 | test_rht_params.max_size, test_rhashtable_max(objs, entries) == 0 ? | |
745 | "no, ok" : "YES, failed"); | |
7e936bd7 | 746 | vfree(objs); |
a6359bd8 | 747 | |
6decd63a TG |
748 | do_div(total_time, runs); |
749 | pr_info("Average test time: %llu\n", total_time); | |
1aa661f5 | 750 | |
499ac3b6 PB |
751 | test_insert_duplicates_run(); |
752 | ||
f4a3e90b PS |
753 | if (!tcount) |
754 | return 0; | |
755 | ||
756 | pr_info("Testing concurrent rhashtable access from %d threads\n", | |
757 | tcount); | |
758 | sema_init(&prestart_sem, 1 - tcount); | |
fad953ce | 759 | tdata = vzalloc(array_size(tcount, sizeof(struct thread_data))); |
f4a3e90b PS |
760 | if (!tdata) |
761 | return -ENOMEM; | |
fad953ce | 762 | objs = vzalloc(array3_size(sizeof(struct test_obj), tcount, entries)); |
f4a3e90b PS |
763 | if (!objs) { |
764 | vfree(tdata); | |
765 | return -ENOMEM; | |
766 | } | |
767 | ||
95e435af PS |
768 | test_rht_params.max_size = max_size ? : |
769 | roundup_pow_of_two(tcount * entries); | |
f4a3e90b PS |
770 | err = rhashtable_init(&ht, &test_rht_params); |
771 | if (err < 0) { | |
772 | pr_warn("Test failed: Unable to initialize hashtable: %d\n", | |
773 | err); | |
774 | vfree(tdata); | |
775 | vfree(objs); | |
776 | return -EINVAL; | |
777 | } | |
778 | for (i = 0; i < tcount; i++) { | |
779 | tdata[i].id = i; | |
f651616e | 780 | tdata[i].entries = entries; |
f4a3e90b PS |
781 | tdata[i].objs = objs + i * entries; |
782 | tdata[i].task = kthread_run(threadfunc, &tdata[i], | |
783 | "rhashtable_thrad[%d]", i); | |
784 | if (IS_ERR(tdata[i].task)) | |
785 | pr_err(" kthread_run failed for thread %d\n", i); | |
786 | else | |
787 | started_threads++; | |
788 | } | |
789 | if (down_interruptible(&prestart_sem)) | |
790 | pr_err(" down interruptible failed\n"); | |
791 | for (i = 0; i < tcount; i++) | |
792 | up(&startup_sem); | |
793 | for (i = 0; i < tcount; i++) { | |
794 | if (IS_ERR(tdata[i].task)) | |
795 | continue; | |
796 | if ((err = kthread_stop(tdata[i].task))) { | |
797 | pr_warn("Test failed: thread %d returned: %d\n", | |
798 | i, err); | |
799 | failed_threads++; | |
800 | } | |
801 | } | |
f4a3e90b PS |
802 | rhashtable_destroy(&ht); |
803 | vfree(tdata); | |
804 | vfree(objs); | |
cdd4de37 FW |
805 | |
806 | /* | |
807 | * rhltable_remove is very expensive, default values can cause test | |
808 | * to run for 2 minutes or more, use a smaller number instead. | |
809 | */ | |
810 | err = test_rhltable(entries / 16); | |
811 | pr_info("Started %d threads, %d failed, rhltable test returns %d\n", | |
812 | started_threads, failed_threads, err); | |
1aa661f5 | 813 | return 0; |
9d6dbe1b GU |
814 | } |
815 | ||
6dd0c165 DB |
816 | static void __exit test_rht_exit(void) |
817 | { | |
818 | } | |
819 | ||
9d6dbe1b | 820 | module_init(test_rht_init); |
6dd0c165 | 821 | module_exit(test_rht_exit); |
9d6dbe1b GU |
822 | |
823 | MODULE_LICENSE("GPL v2"); |