Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9d6dbe1b GU |
2 | /* |
3 | * Resizable, Scalable, Concurrent Hash Table | |
4 | * | |
1aa661f5 | 5 | * Copyright (c) 2014-2015 Thomas Graf <tgraf@suug.ch> |
9d6dbe1b | 6 | * Copyright (c) 2008-2014 Patrick McHardy <kaber@trash.net> |
9d6dbe1b GU |
7 | */ |
8 | ||
9 | /************************************************************************** | |
10 | * Self Test | |
11 | **************************************************************************/ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/jhash.h> | |
15 | #include <linux/kernel.h> | |
f4a3e90b | 16 | #include <linux/kthread.h> |
9d6dbe1b GU |
17 | #include <linux/module.h> |
18 | #include <linux/rcupdate.h> | |
19 | #include <linux/rhashtable.h> | |
20 | #include <linux/slab.h> | |
685a015e | 21 | #include <linux/sched.h> |
cdd4de37 | 22 | #include <linux/random.h> |
f4a3e90b | 23 | #include <linux/vmalloc.h> |
809c6705 | 24 | #include <linux/wait.h> |
9d6dbe1b | 25 | |
1aa661f5 | 26 | #define MAX_ENTRIES 1000000 |
67b7cbf4 | 27 | #define TEST_INSERT_FAIL INT_MAX |
1aa661f5 | 28 | |
f651616e FW |
29 | static int parm_entries = 50000; |
30 | module_param(parm_entries, int, 0); | |
31 | MODULE_PARM_DESC(parm_entries, "Number of entries to add (default: 50000)"); | |
1aa661f5 TG |
32 | |
33 | static int runs = 4; | |
34 | module_param(runs, int, 0); | |
35 | MODULE_PARM_DESC(runs, "Number of test runs per variant (default: 4)"); | |
36 | ||
95e435af | 37 | static int max_size = 0; |
1aa661f5 | 38 | module_param(max_size, int, 0); |
3b3bf80b | 39 | MODULE_PARM_DESC(max_size, "Maximum table size (default: calculated)"); |
1aa661f5 TG |
40 | |
41 | static bool shrinking = false; | |
42 | module_param(shrinking, bool, 0); | |
43 | MODULE_PARM_DESC(shrinking, "Enable automatic shrinking (default: off)"); | |
44 | ||
45 | static int size = 8; | |
46 | module_param(size, int, 0); | |
47 | MODULE_PARM_DESC(size, "Initial size hint of table (default: 8)"); | |
9d6dbe1b | 48 | |
f4a3e90b PS |
49 | static int tcount = 10; |
50 | module_param(tcount, int, 0); | |
51 | MODULE_PARM_DESC(tcount, "Number of threads to spawn (default: 10)"); | |
52 | ||
d662e037 PS |
53 | static bool enomem_retry = false; |
54 | module_param(enomem_retry, bool, 0); | |
55 | MODULE_PARM_DESC(enomem_retry, "Retry insert even if -ENOMEM was returned (default: off)"); | |
56 | ||
e859afe1 PS |
57 | struct test_obj_val { |
58 | int id; | |
59 | int tid; | |
60 | }; | |
61 | ||
9d6dbe1b | 62 | struct test_obj { |
e859afe1 | 63 | struct test_obj_val value; |
9d6dbe1b GU |
64 | struct rhash_head node; |
65 | }; | |
66 | ||
cdd4de37 FW |
67 | struct test_obj_rhl { |
68 | struct test_obj_val value; | |
69 | struct rhlist_head list_node; | |
70 | }; | |
71 | ||
f4a3e90b | 72 | struct thread_data { |
f651616e | 73 | unsigned int entries; |
f4a3e90b PS |
74 | int id; |
75 | struct task_struct *task; | |
76 | struct test_obj *objs; | |
77 | }; | |
78 | ||
499ac3b6 PB |
79 | static u32 my_hashfn(const void *data, u32 len, u32 seed) |
80 | { | |
81 | const struct test_obj_rhl *obj = data; | |
82 | ||
9f9a7077 | 83 | return (obj->value.id % 10); |
499ac3b6 PB |
84 | } |
85 | ||
86 | static int my_cmpfn(struct rhashtable_compare_arg *arg, const void *obj) | |
87 | { | |
88 | const struct test_obj_rhl *test_obj = obj; | |
89 | const struct test_obj_val *val = arg->key; | |
90 | ||
91 | return test_obj->value.id - val->id; | |
92 | } | |
93 | ||
1aa661f5 | 94 | static struct rhashtable_params test_rht_params = { |
b182aa6e HX |
95 | .head_offset = offsetof(struct test_obj, node), |
96 | .key_offset = offsetof(struct test_obj, value), | |
e859afe1 | 97 | .key_len = sizeof(struct test_obj_val), |
b182aa6e | 98 | .hashfn = jhash, |
b182aa6e HX |
99 | }; |
100 | ||
499ac3b6 PB |
101 | static struct rhashtable_params test_rht_params_dup = { |
102 | .head_offset = offsetof(struct test_obj_rhl, list_node), | |
103 | .key_offset = offsetof(struct test_obj_rhl, value), | |
104 | .key_len = sizeof(struct test_obj_val), | |
105 | .hashfn = jhash, | |
106 | .obj_hashfn = my_hashfn, | |
107 | .obj_cmpfn = my_cmpfn, | |
108 | .nelem_hint = 128, | |
109 | .automatic_shrinking = false, | |
110 | }; | |
111 | ||
809c6705 AB |
112 | static atomic_t startup_count; |
113 | static DECLARE_WAIT_QUEUE_HEAD(startup_wait); | |
f4a3e90b | 114 | |
7e936bd7 | 115 | static int insert_retry(struct rhashtable *ht, struct test_obj *obj, |
9e9089e5 PS |
116 | const struct rhashtable_params params) |
117 | { | |
d662e037 | 118 | int err, retries = -1, enomem_retries = 0; |
9e9089e5 PS |
119 | |
120 | do { | |
121 | retries++; | |
122 | cond_resched(); | |
7e936bd7 | 123 | err = rhashtable_insert_fast(ht, &obj->node, params); |
d662e037 PS |
124 | if (err == -ENOMEM && enomem_retry) { |
125 | enomem_retries++; | |
126 | err = -EBUSY; | |
127 | } | |
9e9089e5 PS |
128 | } while (err == -EBUSY); |
129 | ||
d662e037 PS |
130 | if (enomem_retries) |
131 | pr_info(" %u insertions retried after -ENOMEM\n", | |
132 | enomem_retries); | |
133 | ||
9e9089e5 PS |
134 | return err ? : retries; |
135 | } | |
136 | ||
f651616e FW |
137 | static int __init test_rht_lookup(struct rhashtable *ht, struct test_obj *array, |
138 | unsigned int entries) | |
9d6dbe1b GU |
139 | { |
140 | unsigned int i; | |
141 | ||
f651616e | 142 | for (i = 0; i < entries; i++) { |
9d6dbe1b GU |
143 | struct test_obj *obj; |
144 | bool expected = !(i % 2); | |
e859afe1 PS |
145 | struct test_obj_val key = { |
146 | .id = i, | |
147 | }; | |
9d6dbe1b | 148 | |
e859afe1 | 149 | if (array[i / 2].value.id == TEST_INSERT_FAIL) |
67b7cbf4 TG |
150 | expected = false; |
151 | ||
b182aa6e | 152 | obj = rhashtable_lookup_fast(ht, &key, test_rht_params); |
9d6dbe1b GU |
153 | |
154 | if (expected && !obj) { | |
e859afe1 | 155 | pr_warn("Test failed: Could not find key %u\n", key.id); |
9d6dbe1b GU |
156 | return -ENOENT; |
157 | } else if (!expected && obj) { | |
158 | pr_warn("Test failed: Unexpected entry found for key %u\n", | |
e859afe1 | 159 | key.id); |
9d6dbe1b GU |
160 | return -EEXIST; |
161 | } else if (expected && obj) { | |
e859afe1 | 162 | if (obj->value.id != i) { |
c2c8a901 | 163 | pr_warn("Test failed: Lookup value mismatch %u!=%u\n", |
e859afe1 | 164 | obj->value.id, i); |
9d6dbe1b GU |
165 | return -EINVAL; |
166 | } | |
167 | } | |
685a015e TG |
168 | |
169 | cond_resched_rcu(); | |
9d6dbe1b GU |
170 | } |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
f651616e | 175 | static void test_bucket_stats(struct rhashtable *ht, unsigned int entries) |
9d6dbe1b | 176 | { |
6c4128f6 | 177 | unsigned int total = 0, chain_len = 0; |
246b23a7 | 178 | struct rhashtable_iter hti; |
9d6dbe1b | 179 | struct rhash_head *pos; |
9d6dbe1b | 180 | |
6c4128f6 | 181 | rhashtable_walk_enter(ht, &hti); |
97a6ec4a | 182 | rhashtable_walk_start(&hti); |
9d6dbe1b | 183 | |
246b23a7 TG |
184 | while ((pos = rhashtable_walk_next(&hti))) { |
185 | if (PTR_ERR(pos) == -EAGAIN) { | |
186 | pr_info("Info: encountered resize\n"); | |
187 | chain_len++; | |
188 | continue; | |
189 | } else if (IS_ERR(pos)) { | |
190 | pr_warn("Test failed: rhashtable_walk_next() error: %ld\n", | |
191 | PTR_ERR(pos)); | |
192 | break; | |
9d6dbe1b GU |
193 | } |
194 | ||
246b23a7 | 195 | total++; |
9d6dbe1b GU |
196 | } |
197 | ||
246b23a7 TG |
198 | rhashtable_walk_stop(&hti); |
199 | rhashtable_walk_exit(&hti); | |
200 | ||
201 | pr_info(" Traversal complete: counted=%u, nelems=%u, entries=%d, table-jumps=%u\n", | |
202 | total, atomic_read(&ht->nelems), entries, chain_len); | |
9d6dbe1b | 203 | |
1aa661f5 | 204 | if (total != atomic_read(&ht->nelems) || total != entries) |
9d6dbe1b GU |
205 | pr_warn("Test failed: Total count mismatch ^^^"); |
206 | } | |
207 | ||
f651616e FW |
208 | static s64 __init test_rhashtable(struct rhashtable *ht, struct test_obj *array, |
209 | unsigned int entries) | |
9d6dbe1b | 210 | { |
9d6dbe1b | 211 | struct test_obj *obj; |
9d6dbe1b | 212 | int err; |
9e9089e5 | 213 | unsigned int i, insert_retries = 0; |
1aa661f5 | 214 | s64 start, end; |
9d6dbe1b GU |
215 | |
216 | /* | |
217 | * Insertion Test: | |
1aa661f5 | 218 | * Insert entries into table with all keys even numbers |
9d6dbe1b | 219 | */ |
1aa661f5 TG |
220 | pr_info(" Adding %d keys\n", entries); |
221 | start = ktime_get_ns(); | |
222 | for (i = 0; i < entries; i++) { | |
fcc57020 | 223 | struct test_obj *obj = &array[i]; |
9d6dbe1b | 224 | |
e859afe1 | 225 | obj->value.id = i * 2; |
7e936bd7 | 226 | err = insert_retry(ht, obj, test_rht_params); |
9e9089e5 PS |
227 | if (err > 0) |
228 | insert_retries += err; | |
229 | else if (err) | |
fcc57020 | 230 | return err; |
9d6dbe1b GU |
231 | } |
232 | ||
9e9089e5 PS |
233 | if (insert_retries) |
234 | pr_info(" %u insertions retried due to memory pressure\n", | |
235 | insert_retries); | |
67b7cbf4 | 236 | |
f651616e | 237 | test_bucket_stats(ht, entries); |
9d6dbe1b | 238 | rcu_read_lock(); |
f651616e | 239 | test_rht_lookup(ht, array, entries); |
9d6dbe1b GU |
240 | rcu_read_unlock(); |
241 | ||
f651616e | 242 | test_bucket_stats(ht, entries); |
9d6dbe1b | 243 | |
1aa661f5 TG |
244 | pr_info(" Deleting %d keys\n", entries); |
245 | for (i = 0; i < entries; i++) { | |
78369255 PS |
246 | struct test_obj_val key = { |
247 | .id = i * 2, | |
248 | }; | |
9d6dbe1b | 249 | |
e859afe1 | 250 | if (array[i].value.id != TEST_INSERT_FAIL) { |
67b7cbf4 TG |
251 | obj = rhashtable_lookup_fast(ht, &key, test_rht_params); |
252 | BUG_ON(!obj); | |
9d6dbe1b | 253 | |
67b7cbf4 TG |
254 | rhashtable_remove_fast(ht, &obj->node, test_rht_params); |
255 | } | |
685a015e TG |
256 | |
257 | cond_resched(); | |
9d6dbe1b GU |
258 | } |
259 | ||
1aa661f5 TG |
260 | end = ktime_get_ns(); |
261 | pr_info(" Duration of test: %lld ns\n", end - start); | |
262 | ||
263 | return end - start; | |
9d6dbe1b GU |
264 | } |
265 | ||
b7f5e5c7 | 266 | static struct rhashtable ht; |
411d788a | 267 | static struct rhltable rhlt; |
cdd4de37 FW |
268 | |
269 | static int __init test_rhltable(unsigned int entries) | |
270 | { | |
271 | struct test_obj_rhl *rhl_test_objects; | |
272 | unsigned long *obj_in_table; | |
273 | unsigned int i, j, k; | |
274 | int ret, err; | |
275 | ||
276 | if (entries == 0) | |
277 | entries = 1; | |
278 | ||
fad953ce KC |
279 | rhl_test_objects = vzalloc(array_size(entries, |
280 | sizeof(*rhl_test_objects))); | |
cdd4de37 FW |
281 | if (!rhl_test_objects) |
282 | return -ENOMEM; | |
283 | ||
284 | ret = -ENOMEM; | |
fad953ce KC |
285 | obj_in_table = vzalloc(array_size(sizeof(unsigned long), |
286 | BITS_TO_LONGS(entries))); | |
cdd4de37 FW |
287 | if (!obj_in_table) |
288 | goto out_free; | |
289 | ||
cdd4de37 FW |
290 | err = rhltable_init(&rhlt, &test_rht_params); |
291 | if (WARN_ON(err)) | |
292 | goto out_free; | |
293 | ||
a251c17a | 294 | k = get_random_u32(); |
cdd4de37 FW |
295 | ret = 0; |
296 | for (i = 0; i < entries; i++) { | |
297 | rhl_test_objects[i].value.id = k; | |
298 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, | |
299 | test_rht_params); | |
300 | if (WARN(err, "error %d on element %d\n", err, i)) | |
301 | break; | |
302 | if (err == 0) | |
303 | set_bit(i, obj_in_table); | |
304 | } | |
305 | ||
306 | if (err) | |
307 | ret = err; | |
308 | ||
309 | pr_info("test %d add/delete pairs into rhlist\n", entries); | |
310 | for (i = 0; i < entries; i++) { | |
311 | struct rhlist_head *h, *pos; | |
312 | struct test_obj_rhl *obj; | |
313 | struct test_obj_val key = { | |
314 | .id = k, | |
315 | }; | |
316 | bool found; | |
317 | ||
318 | rcu_read_lock(); | |
319 | h = rhltable_lookup(&rhlt, &key, test_rht_params); | |
320 | if (WARN(!h, "key not found during iteration %d of %d", i, entries)) { | |
321 | rcu_read_unlock(); | |
322 | break; | |
323 | } | |
324 | ||
325 | if (i) { | |
326 | j = i - 1; | |
327 | rhl_for_each_entry_rcu(obj, pos, h, list_node) { | |
328 | if (WARN(pos == &rhl_test_objects[j].list_node, "old element found, should be gone")) | |
329 | break; | |
330 | } | |
331 | } | |
332 | ||
333 | cond_resched_rcu(); | |
334 | ||
335 | found = false; | |
336 | ||
337 | rhl_for_each_entry_rcu(obj, pos, h, list_node) { | |
338 | if (pos == &rhl_test_objects[i].list_node) { | |
339 | found = true; | |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | rcu_read_unlock(); | |
345 | ||
346 | if (WARN(!found, "element %d not found", i)) | |
347 | break; | |
348 | ||
349 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
350 | WARN(err, "rhltable_remove: err %d for iteration %d\n", err, i); | |
351 | if (err == 0) | |
352 | clear_bit(i, obj_in_table); | |
353 | } | |
354 | ||
355 | if (ret == 0 && err) | |
356 | ret = err; | |
357 | ||
358 | for (i = 0; i < entries; i++) { | |
359 | WARN(test_bit(i, obj_in_table), "elem %d allegedly still present", i); | |
360 | ||
361 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, | |
362 | test_rht_params); | |
363 | if (WARN(err, "error %d on element %d\n", err, i)) | |
364 | break; | |
365 | if (err == 0) | |
366 | set_bit(i, obj_in_table); | |
367 | } | |
368 | ||
369 | pr_info("test %d random rhlist add/delete operations\n", entries); | |
370 | for (j = 0; j < entries; j++) { | |
371 | u32 i = prandom_u32_max(entries); | |
c5f0a172 | 372 | u32 prand = prandom_u32_max(4); |
cdd4de37 FW |
373 | |
374 | cond_resched(); | |
375 | ||
cdd4de37 FW |
376 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); |
377 | if (test_bit(i, obj_in_table)) { | |
378 | clear_bit(i, obj_in_table); | |
379 | if (WARN(err, "cannot remove element at slot %d", i)) | |
380 | continue; | |
381 | } else { | |
56b90fa0 | 382 | if (WARN(err != -ENOENT, "removed non-existent element %d, error %d not %d", |
cdd4de37 FW |
383 | i, err, -ENOENT)) |
384 | continue; | |
385 | } | |
386 | ||
387 | if (prand & 1) { | |
c5f0a172 REB |
388 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); |
389 | if (err == 0) { | |
390 | if (WARN(test_and_set_bit(i, obj_in_table), "succeeded to insert same object %d", i)) | |
391 | continue; | |
392 | } else { | |
393 | if (WARN(!test_bit(i, obj_in_table), "failed to insert object %d", i)) | |
394 | continue; | |
395 | } | |
cdd4de37 FW |
396 | } |
397 | ||
c5f0a172 REB |
398 | if (prand & 2) { |
399 | i = prandom_u32_max(entries); | |
400 | if (test_bit(i, obj_in_table)) { | |
401 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
402 | WARN(err, "cannot remove element at slot %d", i); | |
403 | if (err == 0) | |
404 | clear_bit(i, obj_in_table); | |
405 | } else { | |
406 | err = rhltable_insert(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
407 | WARN(err, "failed to insert object %d", i); | |
408 | if (err == 0) | |
409 | set_bit(i, obj_in_table); | |
410 | } | |
cdd4de37 FW |
411 | } |
412 | } | |
413 | ||
414 | for (i = 0; i < entries; i++) { | |
415 | cond_resched(); | |
416 | err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params); | |
417 | if (test_bit(i, obj_in_table)) { | |
418 | if (WARN(err, "cannot remove element at slot %d", i)) | |
419 | continue; | |
420 | } else { | |
56b90fa0 | 421 | if (WARN(err != -ENOENT, "removed non-existent element, error %d not %d", |
cdd4de37 | 422 | err, -ENOENT)) |
769f5083 | 423 | continue; |
cdd4de37 FW |
424 | } |
425 | } | |
426 | ||
427 | rhltable_destroy(&rhlt); | |
428 | out_free: | |
429 | vfree(rhl_test_objects); | |
430 | vfree(obj_in_table); | |
431 | return ret; | |
432 | } | |
b7f5e5c7 | 433 | |
a6359bd8 FW |
434 | static int __init test_rhashtable_max(struct test_obj *array, |
435 | unsigned int entries) | |
436 | { | |
437 | unsigned int i, insert_retries = 0; | |
438 | int err; | |
439 | ||
440 | test_rht_params.max_size = roundup_pow_of_two(entries / 8); | |
441 | err = rhashtable_init(&ht, &test_rht_params); | |
442 | if (err) | |
443 | return err; | |
444 | ||
445 | for (i = 0; i < ht.max_elems; i++) { | |
446 | struct test_obj *obj = &array[i]; | |
447 | ||
448 | obj->value.id = i * 2; | |
449 | err = insert_retry(&ht, obj, test_rht_params); | |
450 | if (err > 0) | |
451 | insert_retries += err; | |
452 | else if (err) | |
453 | return err; | |
454 | } | |
455 | ||
456 | err = insert_retry(&ht, &array[ht.max_elems], test_rht_params); | |
457 | if (err == -E2BIG) { | |
458 | err = 0; | |
459 | } else { | |
460 | pr_info("insert element %u should have failed with %d, got %d\n", | |
461 | ht.max_elems, -E2BIG, err); | |
462 | if (err == 0) | |
463 | err = -1; | |
464 | } | |
465 | ||
466 | rhashtable_destroy(&ht); | |
467 | ||
468 | return err; | |
469 | } | |
470 | ||
499ac3b6 PB |
471 | static unsigned int __init print_ht(struct rhltable *rhlt) |
472 | { | |
473 | struct rhashtable *ht; | |
474 | const struct bucket_table *tbl; | |
475 | char buff[512] = ""; | |
4adec7f8 | 476 | int offset = 0; |
499ac3b6 PB |
477 | unsigned int i, cnt = 0; |
478 | ||
479 | ht = &rhlt->ht; | |
cbab9012 N |
480 | /* Take the mutex to avoid RCU warning */ |
481 | mutex_lock(&ht->mutex); | |
499ac3b6 PB |
482 | tbl = rht_dereference(ht->tbl, ht); |
483 | for (i = 0; i < tbl->size; i++) { | |
484 | struct rhash_head *pos, *next; | |
485 | struct test_obj_rhl *p; | |
486 | ||
adc6a3ab | 487 | pos = rht_ptr_exclusive(tbl->buckets + i); |
499ac3b6 PB |
488 | next = !rht_is_a_nulls(pos) ? rht_dereference(pos->next, ht) : NULL; |
489 | ||
490 | if (!rht_is_a_nulls(pos)) { | |
4adec7f8 | 491 | offset += sprintf(buff + offset, "\nbucket[%d] -> ", i); |
499ac3b6 PB |
492 | } |
493 | ||
494 | while (!rht_is_a_nulls(pos)) { | |
495 | struct rhlist_head *list = container_of(pos, struct rhlist_head, rhead); | |
4adec7f8 | 496 | offset += sprintf(buff + offset, "[["); |
499ac3b6 PB |
497 | do { |
498 | pos = &list->rhead; | |
499 | list = rht_dereference(list->next, ht); | |
500 | p = rht_obj(ht, pos); | |
501 | ||
4adec7f8 | 502 | offset += sprintf(buff + offset, " val %d (tid=%d)%s", p->value.id, p->value.tid, |
499ac3b6 PB |
503 | list? ", " : " "); |
504 | cnt++; | |
505 | } while (list); | |
506 | ||
507 | pos = next, | |
508 | next = !rht_is_a_nulls(pos) ? | |
509 | rht_dereference(pos->next, ht) : NULL; | |
510 | ||
4adec7f8 | 511 | offset += sprintf(buff + offset, "]]%s", !rht_is_a_nulls(pos) ? " -> " : ""); |
499ac3b6 PB |
512 | } |
513 | } | |
514 | printk(KERN_ERR "\n---- ht: ----%s\n-------------\n", buff); | |
cbab9012 | 515 | mutex_unlock(&ht->mutex); |
499ac3b6 PB |
516 | |
517 | return cnt; | |
518 | } | |
519 | ||
520 | static int __init test_insert_dup(struct test_obj_rhl *rhl_test_objects, | |
521 | int cnt, bool slow) | |
522 | { | |
fc42a689 | 523 | struct rhltable *rhlt; |
499ac3b6 PB |
524 | unsigned int i, ret; |
525 | const char *key; | |
526 | int err = 0; | |
527 | ||
fc42a689 BVA |
528 | rhlt = kmalloc(sizeof(*rhlt), GFP_KERNEL); |
529 | if (WARN_ON(!rhlt)) | |
530 | return -EINVAL; | |
531 | ||
532 | err = rhltable_init(rhlt, &test_rht_params_dup); | |
533 | if (WARN_ON(err)) { | |
534 | kfree(rhlt); | |
499ac3b6 | 535 | return err; |
fc42a689 | 536 | } |
499ac3b6 PB |
537 | |
538 | for (i = 0; i < cnt; i++) { | |
539 | rhl_test_objects[i].value.tid = i; | |
fc42a689 | 540 | key = rht_obj(&rhlt->ht, &rhl_test_objects[i].list_node.rhead); |
499ac3b6 PB |
541 | key += test_rht_params_dup.key_offset; |
542 | ||
543 | if (slow) { | |
fc42a689 | 544 | err = PTR_ERR(rhashtable_insert_slow(&rhlt->ht, key, |
499ac3b6 PB |
545 | &rhl_test_objects[i].list_node.rhead)); |
546 | if (err == -EAGAIN) | |
547 | err = 0; | |
548 | } else | |
fc42a689 | 549 | err = rhltable_insert(rhlt, |
499ac3b6 PB |
550 | &rhl_test_objects[i].list_node, |
551 | test_rht_params_dup); | |
552 | if (WARN(err, "error %d on element %d/%d (%s)\n", err, i, cnt, slow? "slow" : "fast")) | |
553 | goto skip_print; | |
554 | } | |
555 | ||
fc42a689 | 556 | ret = print_ht(rhlt); |
499ac3b6 PB |
557 | WARN(ret != cnt, "missing rhltable elements (%d != %d, %s)\n", ret, cnt, slow? "slow" : "fast"); |
558 | ||
559 | skip_print: | |
fc42a689 BVA |
560 | rhltable_destroy(rhlt); |
561 | kfree(rhlt); | |
499ac3b6 PB |
562 | |
563 | return 0; | |
564 | } | |
565 | ||
566 | static int __init test_insert_duplicates_run(void) | |
567 | { | |
568 | struct test_obj_rhl rhl_test_objects[3] = {}; | |
569 | ||
570 | pr_info("test inserting duplicates\n"); | |
571 | ||
572 | /* two different values that map to same bucket */ | |
573 | rhl_test_objects[0].value.id = 1; | |
574 | rhl_test_objects[1].value.id = 21; | |
575 | ||
576 | /* and another duplicate with same as [0] value | |
577 | * which will be second on the bucket list */ | |
578 | rhl_test_objects[2].value.id = rhl_test_objects[0].value.id; | |
579 | ||
580 | test_insert_dup(rhl_test_objects, 2, false); | |
581 | test_insert_dup(rhl_test_objects, 3, false); | |
582 | test_insert_dup(rhl_test_objects, 2, true); | |
583 | test_insert_dup(rhl_test_objects, 3, true); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
f4a3e90b PS |
588 | static int thread_lookup_test(struct thread_data *tdata) |
589 | { | |
f651616e | 590 | unsigned int entries = tdata->entries; |
f4a3e90b PS |
591 | int i, err = 0; |
592 | ||
593 | for (i = 0; i < entries; i++) { | |
594 | struct test_obj *obj; | |
e859afe1 PS |
595 | struct test_obj_val key = { |
596 | .id = i, | |
597 | .tid = tdata->id, | |
598 | }; | |
f4a3e90b PS |
599 | |
600 | obj = rhashtable_lookup_fast(&ht, &key, test_rht_params); | |
e859afe1 PS |
601 | if (obj && (tdata->objs[i].value.id == TEST_INSERT_FAIL)) { |
602 | pr_err(" found unexpected object %d-%d\n", key.tid, key.id); | |
f4a3e90b | 603 | err++; |
e859afe1 PS |
604 | } else if (!obj && (tdata->objs[i].value.id != TEST_INSERT_FAIL)) { |
605 | pr_err(" object %d-%d not found!\n", key.tid, key.id); | |
f4a3e90b | 606 | err++; |
e859afe1 PS |
607 | } else if (obj && memcmp(&obj->value, &key, sizeof(key))) { |
608 | pr_err(" wrong object returned (got %d-%d, expected %d-%d)\n", | |
609 | obj->value.tid, obj->value.id, key.tid, key.id); | |
f4a3e90b PS |
610 | err++; |
611 | } | |
cd5b318d PS |
612 | |
613 | cond_resched(); | |
f4a3e90b PS |
614 | } |
615 | return err; | |
616 | } | |
617 | ||
618 | static int threadfunc(void *data) | |
619 | { | |
9e9089e5 | 620 | int i, step, err = 0, insert_retries = 0; |
f4a3e90b PS |
621 | struct thread_data *tdata = data; |
622 | ||
809c6705 AB |
623 | if (atomic_dec_and_test(&startup_count)) |
624 | wake_up(&startup_wait); | |
625 | if (wait_event_interruptible(startup_wait, atomic_read(&startup_count) == -1)) { | |
626 | pr_err(" thread[%d]: interrupted\n", tdata->id); | |
627 | goto out; | |
628 | } | |
f4a3e90b | 629 | |
f651616e | 630 | for (i = 0; i < tdata->entries; i++) { |
e859afe1 PS |
631 | tdata->objs[i].value.id = i; |
632 | tdata->objs[i].value.tid = tdata->id; | |
7e936bd7 | 633 | err = insert_retry(&ht, &tdata->objs[i], test_rht_params); |
9e9089e5 PS |
634 | if (err > 0) { |
635 | insert_retries += err; | |
f4a3e90b PS |
636 | } else if (err) { |
637 | pr_err(" thread[%d]: rhashtable_insert_fast failed\n", | |
638 | tdata->id); | |
639 | goto out; | |
640 | } | |
641 | } | |
9e9089e5 PS |
642 | if (insert_retries) |
643 | pr_info(" thread[%d]: %u insertions retried due to memory pressure\n", | |
644 | tdata->id, insert_retries); | |
f4a3e90b PS |
645 | |
646 | err = thread_lookup_test(tdata); | |
647 | if (err) { | |
648 | pr_err(" thread[%d]: rhashtable_lookup_test failed\n", | |
649 | tdata->id); | |
650 | goto out; | |
651 | } | |
652 | ||
653 | for (step = 10; step > 0; step--) { | |
f651616e | 654 | for (i = 0; i < tdata->entries; i += step) { |
e859afe1 | 655 | if (tdata->objs[i].value.id == TEST_INSERT_FAIL) |
f4a3e90b PS |
656 | continue; |
657 | err = rhashtable_remove_fast(&ht, &tdata->objs[i].node, | |
658 | test_rht_params); | |
659 | if (err) { | |
660 | pr_err(" thread[%d]: rhashtable_remove_fast failed\n", | |
661 | tdata->id); | |
662 | goto out; | |
663 | } | |
e859afe1 | 664 | tdata->objs[i].value.id = TEST_INSERT_FAIL; |
cd5b318d PS |
665 | |
666 | cond_resched(); | |
f4a3e90b PS |
667 | } |
668 | err = thread_lookup_test(tdata); | |
669 | if (err) { | |
670 | pr_err(" thread[%d]: rhashtable_lookup_test (2) failed\n", | |
671 | tdata->id); | |
672 | goto out; | |
673 | } | |
674 | } | |
675 | out: | |
676 | while (!kthread_should_stop()) { | |
677 | set_current_state(TASK_INTERRUPTIBLE); | |
678 | schedule(); | |
679 | } | |
680 | return err; | |
681 | } | |
682 | ||
9d6dbe1b GU |
683 | static int __init test_rht_init(void) |
684 | { | |
f651616e | 685 | unsigned int entries; |
f4a3e90b | 686 | int i, err, started_threads = 0, failed_threads = 0; |
1aa661f5 | 687 | u64 total_time = 0; |
f4a3e90b PS |
688 | struct thread_data *tdata; |
689 | struct test_obj *objs; | |
9d6dbe1b | 690 | |
f651616e FW |
691 | if (parm_entries < 0) |
692 | parm_entries = 1; | |
693 | ||
694 | entries = min(parm_entries, MAX_ENTRIES); | |
9d6dbe1b | 695 | |
1aa661f5 | 696 | test_rht_params.automatic_shrinking = shrinking; |
95e435af | 697 | test_rht_params.max_size = max_size ? : roundup_pow_of_two(entries); |
1aa661f5 | 698 | test_rht_params.nelem_hint = size; |
9d6dbe1b | 699 | |
fad953ce KC |
700 | objs = vzalloc(array_size(sizeof(struct test_obj), |
701 | test_rht_params.max_size + 1)); | |
7e936bd7 FW |
702 | if (!objs) |
703 | return -ENOMEM; | |
704 | ||
1aa661f5 TG |
705 | pr_info("Running rhashtable test nelem=%d, max_size=%d, shrinking=%d\n", |
706 | size, max_size, shrinking); | |
9d6dbe1b | 707 | |
1aa661f5 TG |
708 | for (i = 0; i < runs; i++) { |
709 | s64 time; | |
9d6dbe1b | 710 | |
1aa661f5 | 711 | pr_info("Test %02d:\n", i); |
7e936bd7 FW |
712 | memset(objs, 0, test_rht_params.max_size * sizeof(struct test_obj)); |
713 | ||
1aa661f5 TG |
714 | err = rhashtable_init(&ht, &test_rht_params); |
715 | if (err < 0) { | |
716 | pr_warn("Test failed: Unable to initialize hashtable: %d\n", | |
717 | err); | |
718 | continue; | |
719 | } | |
720 | ||
f651616e | 721 | time = test_rhashtable(&ht, objs, entries); |
1aa661f5 TG |
722 | rhashtable_destroy(&ht); |
723 | if (time < 0) { | |
7e936bd7 | 724 | vfree(objs); |
1aa661f5 TG |
725 | pr_warn("Test failed: return code %lld\n", time); |
726 | return -EINVAL; | |
727 | } | |
728 | ||
729 | total_time += time; | |
730 | } | |
731 | ||
a6359bd8 FW |
732 | pr_info("test if its possible to exceed max_size %d: %s\n", |
733 | test_rht_params.max_size, test_rhashtable_max(objs, entries) == 0 ? | |
734 | "no, ok" : "YES, failed"); | |
7e936bd7 | 735 | vfree(objs); |
a6359bd8 | 736 | |
6decd63a TG |
737 | do_div(total_time, runs); |
738 | pr_info("Average test time: %llu\n", total_time); | |
1aa661f5 | 739 | |
499ac3b6 PB |
740 | test_insert_duplicates_run(); |
741 | ||
f4a3e90b PS |
742 | if (!tcount) |
743 | return 0; | |
744 | ||
745 | pr_info("Testing concurrent rhashtable access from %d threads\n", | |
746 | tcount); | |
809c6705 | 747 | atomic_set(&startup_count, tcount); |
fad953ce | 748 | tdata = vzalloc(array_size(tcount, sizeof(struct thread_data))); |
f4a3e90b PS |
749 | if (!tdata) |
750 | return -ENOMEM; | |
fad953ce | 751 | objs = vzalloc(array3_size(sizeof(struct test_obj), tcount, entries)); |
f4a3e90b PS |
752 | if (!objs) { |
753 | vfree(tdata); | |
754 | return -ENOMEM; | |
755 | } | |
756 | ||
95e435af PS |
757 | test_rht_params.max_size = max_size ? : |
758 | roundup_pow_of_two(tcount * entries); | |
f4a3e90b PS |
759 | err = rhashtable_init(&ht, &test_rht_params); |
760 | if (err < 0) { | |
761 | pr_warn("Test failed: Unable to initialize hashtable: %d\n", | |
762 | err); | |
763 | vfree(tdata); | |
764 | vfree(objs); | |
765 | return -EINVAL; | |
766 | } | |
767 | for (i = 0; i < tcount; i++) { | |
768 | tdata[i].id = i; | |
f651616e | 769 | tdata[i].entries = entries; |
f4a3e90b PS |
770 | tdata[i].objs = objs + i * entries; |
771 | tdata[i].task = kthread_run(threadfunc, &tdata[i], | |
772 | "rhashtable_thrad[%d]", i); | |
809c6705 | 773 | if (IS_ERR(tdata[i].task)) { |
f4a3e90b | 774 | pr_err(" kthread_run failed for thread %d\n", i); |
809c6705 AB |
775 | atomic_dec(&startup_count); |
776 | } else { | |
f4a3e90b | 777 | started_threads++; |
809c6705 | 778 | } |
f4a3e90b | 779 | } |
809c6705 AB |
780 | if (wait_event_interruptible(startup_wait, atomic_read(&startup_count) == 0)) |
781 | pr_err(" wait_event interruptible failed\n"); | |
782 | /* count is 0 now, set it to -1 and wake up all threads together */ | |
783 | atomic_dec(&startup_count); | |
784 | wake_up_all(&startup_wait); | |
f4a3e90b PS |
785 | for (i = 0; i < tcount; i++) { |
786 | if (IS_ERR(tdata[i].task)) | |
787 | continue; | |
788 | if ((err = kthread_stop(tdata[i].task))) { | |
789 | pr_warn("Test failed: thread %d returned: %d\n", | |
790 | i, err); | |
791 | failed_threads++; | |
792 | } | |
793 | } | |
f4a3e90b PS |
794 | rhashtable_destroy(&ht); |
795 | vfree(tdata); | |
796 | vfree(objs); | |
cdd4de37 FW |
797 | |
798 | /* | |
799 | * rhltable_remove is very expensive, default values can cause test | |
800 | * to run for 2 minutes or more, use a smaller number instead. | |
801 | */ | |
802 | err = test_rhltable(entries / 16); | |
803 | pr_info("Started %d threads, %d failed, rhltable test returns %d\n", | |
804 | started_threads, failed_threads, err); | |
1aa661f5 | 805 | return 0; |
9d6dbe1b GU |
806 | } |
807 | ||
6dd0c165 DB |
808 | static void __exit test_rht_exit(void) |
809 | { | |
810 | } | |
811 | ||
9d6dbe1b | 812 | module_init(test_rht_init); |
6dd0c165 | 813 | module_exit(test_rht_exit); |
9d6dbe1b GU |
814 | |
815 | MODULE_LICENSE("GPL v2"); |