projects/linux·blob master · refs

330 lines · 7.4 KiB

1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <stdlib.h>
4#include <unistd.h>
5#include <time.h>
6#include <assert.h>
7#include <limits.h>
8
9#include <linux/slab.h>
10#include <linux/radix-tree.h>
11
12#include "test.h"
13#include "regression.h"
14
15void __gang_check(unsigned long middle, long down, long up, int chunk, int hop)
16{
17 long idx;
18 RADIX_TREE(tree, GFP_KERNEL);
19
20 middle = 1 << 30;
21
22 for (idx = -down; idx < up; idx++)
23 item_insert(&tree, middle + idx);
24
25 item_check_absent(&tree, middle - down - 1);
26 for (idx = -down; idx < up; idx++)
27 item_check_present(&tree, middle + idx);
28 item_check_absent(&tree, middle + up);
29
30 if (chunk > 0) {
31 item_gang_check_present(&tree, middle - down, up + down,
32 chunk, hop);
33 item_full_scan(&tree, middle - down, down + up, chunk);
34 }
35 item_kill_tree(&tree);
36}
37
38void gang_check(void)
39{
40 __gang_check(1UL << 30, 128, 128, 35, 2);
41 __gang_check(1UL << 31, 128, 128, 32, 32);
42 __gang_check(1UL << 31, 128, 128, 32, 100);
43 __gang_check(1UL << 31, 128, 128, 17, 7);
44 __gang_check(0xffff0000UL, 0, 65536, 17, 7);
45 __gang_check(0xfffffffeUL, 1, 1, 17, 7);
46}
47
48void __big_gang_check(void)
49{
50 unsigned long start;
51 int wrapped = 0;
52
53 start = 0;
54 do {
55 unsigned long old_start;
56
57// printf("0x%08lx\n", start);
58 __gang_check(start, rand() % 113 + 1, rand() % 71,
59 rand() % 157, rand() % 91 + 1);
60 old_start = start;
61 start += rand() % 1000000;
62 start %= 1ULL << 33;
63 if (start < old_start)
64 wrapped = 1;
65 } while (!wrapped);
66}
67
68void big_gang_check(bool long_run)
69{
70 int i;
71
72 for (i = 0; i < (long_run ? 1000 : 3); i++) {
73 __big_gang_check();
74 printv(2, "%d ", i);
75 fflush(stdout);
76 }
77}
78
79void add_and_check(void)
80{
81 RADIX_TREE(tree, GFP_KERNEL);
82
83 item_insert(&tree, 44);
84 item_check_present(&tree, 44);
85 item_check_absent(&tree, 43);
86 item_kill_tree(&tree);
87}
88
89void dynamic_height_check(void)
90{
91 int i;
92 RADIX_TREE(tree, GFP_KERNEL);
93 tree_verify_min_height(&tree, 0);
94
95 item_insert(&tree, 42);
96 tree_verify_min_height(&tree, 42);
97
98 item_insert(&tree, 1000000);
99 tree_verify_min_height(&tree, 1000000);
100
101 assert(item_delete(&tree, 1000000));
102 tree_verify_min_height(&tree, 42);
103
104 assert(item_delete(&tree, 42));
105 tree_verify_min_height(&tree, 0);
106
107 for (i = 0; i < 1000; i++) {
108 item_insert(&tree, i);
109 tree_verify_min_height(&tree, i);
110 }
111
112 i--;
113 for (;;) {
114 assert(item_delete(&tree, i));
115 if (i == 0) {
116 tree_verify_min_height(&tree, 0);
117 break;
118 }
119 i--;
120 tree_verify_min_height(&tree, i);
121 }
122
123 item_kill_tree(&tree);
124}
125
126void check_copied_tags(struct radix_tree_root *tree, unsigned long start, unsigned long end, unsigned long *idx, int count, int fromtag, int totag)
127{
128 int i;
129
130 for (i = 0; i < count; i++) {
131/* if (i % 1000 == 0)
132 putchar('.'); */
133 if (idx[i] < start || idx[i] > end) {
134 if (item_tag_get(tree, idx[i], totag)) {
135 printv(2, "%lu-%lu: %lu, tags %d-%d\n", start,
136 end, idx[i], item_tag_get(tree, idx[i],
137 fromtag),
138 item_tag_get(tree, idx[i], totag));
139 }
140 assert(!item_tag_get(tree, idx[i], totag));
141 continue;
142 }
143 if (item_tag_get(tree, idx[i], fromtag) ^
144 item_tag_get(tree, idx[i], totag)) {
145 printv(2, "%lu-%lu: %lu, tags %d-%d\n", start, end,
146 idx[i], item_tag_get(tree, idx[i], fromtag),
147 item_tag_get(tree, idx[i], totag));
148 }
149 assert(!(item_tag_get(tree, idx[i], fromtag) ^
150 item_tag_get(tree, idx[i], totag)));
151 }
152}
153
154#define ITEMS 50000
155
156void copy_tag_check(void)
157{
158 RADIX_TREE(tree, GFP_KERNEL);
159 unsigned long idx[ITEMS];
160 unsigned long start, end, count = 0, tagged, cur, tmp;
161 int i;
162
163// printf("generating radix tree indices...\n");
164 start = rand();
165 end = rand();
166 if (start > end && (rand() % 10)) {
167 cur = start;
168 start = end;
169 end = cur;
170 }
171 /* Specifically create items around the start and the end of the range
172 * with high probability to check for off by one errors */
173 cur = rand();
174 if (cur & 1) {
175 item_insert(&tree, start);
176 if (cur & 2) {
177 if (start <= end)
178 count++;
179 item_tag_set(&tree, start, 0);
180 }
181 }
182 if (cur & 4) {
183 item_insert(&tree, start-1);
184 if (cur & 8)
185 item_tag_set(&tree, start-1, 0);
186 }
187 if (cur & 16) {
188 item_insert(&tree, end);
189 if (cur & 32) {
190 if (start <= end)
191 count++;
192 item_tag_set(&tree, end, 0);
193 }
194 }
195 if (cur & 64) {
196 item_insert(&tree, end+1);
197 if (cur & 128)
198 item_tag_set(&tree, end+1, 0);
199 }
200
201 for (i = 0; i < ITEMS; i++) {
202 do {
203 idx[i] = rand();
204 } while (item_lookup(&tree, idx[i]));
205
206 item_insert(&tree, idx[i]);
207 if (rand() & 1) {
208 item_tag_set(&tree, idx[i], 0);
209 if (idx[i] >= start && idx[i] <= end)
210 count++;
211 }
212/* if (i % 1000 == 0)
213 putchar('.'); */
214 }
215
216// printf("\ncopying tags...\n");
217 tagged = tag_tagged_items(&tree, start, end, ITEMS, XA_MARK_0, XA_MARK_1);
218
219// printf("checking copied tags\n");
220 assert(tagged == count);
221 check_copied_tags(&tree, start, end, idx, ITEMS, 0, 1);
222
223 /* Copy tags in several rounds */
224// printf("\ncopying tags...\n");
225 tmp = rand() % (count / 10 + 2);
226 tagged = tag_tagged_items(&tree, start, end, tmp, XA_MARK_0, XA_MARK_2);
227 assert(tagged == count);
228
229// printf("%lu %lu %lu\n", tagged, tmp, count);
230// printf("checking copied tags\n");
231 check_copied_tags(&tree, start, end, idx, ITEMS, 0, 2);
232 verify_tag_consistency(&tree, 0);
233 verify_tag_consistency(&tree, 1);
234 verify_tag_consistency(&tree, 2);
235// printf("\n");
236 item_kill_tree(&tree);
237}
238
239static void single_thread_tests(bool long_run)
240{
241 int i;
242
243 printv(1, "starting single_thread_tests: %d allocated, preempt %d\n",
244 nr_allocated, preempt_count);
245 multiorder_checks();
246 rcu_barrier();
247 printv(2, "after multiorder_check: %d allocated, preempt %d\n",
248 nr_allocated, preempt_count);
249 tag_check();
250 rcu_barrier();
251 printv(2, "after tag_check: %d allocated, preempt %d\n",
252 nr_allocated, preempt_count);
253 gang_check();
254 rcu_barrier();
255 printv(2, "after gang_check: %d allocated, preempt %d\n",
256 nr_allocated, preempt_count);
257 add_and_check();
258 rcu_barrier();
259 printv(2, "after add_and_check: %d allocated, preempt %d\n",
260 nr_allocated, preempt_count);
261 dynamic_height_check();
262 rcu_barrier();
263 printv(2, "after dynamic_height_check: %d allocated, preempt %d\n",
264 nr_allocated, preempt_count);
265 idr_checks();
266 ida_tests();
267 rcu_barrier();
268 printv(2, "after idr_checks: %d allocated, preempt %d\n",
269 nr_allocated, preempt_count);
270 big_gang_check(long_run);
271 rcu_barrier();
272 printv(2, "after big_gang_check: %d allocated, preempt %d\n",
273 nr_allocated, preempt_count);
274 for (i = 0; i < (long_run ? 2000 : 3); i++) {
275 copy_tag_check();
276 printv(2, "%d ", i);
277 fflush(stdout);
278 }
279 rcu_barrier();
280 printv(2, "after copy_tag_check: %d allocated, preempt %d\n",
281 nr_allocated, preempt_count);
282}
283
284int main(int argc, char **argv)
285{
286 bool long_run = false;
287 int opt;
288 unsigned int seed = time(NULL);
289
290 while ((opt = getopt(argc, argv, "ls:v")) != -1) {
291 if (opt == 'l')
292 long_run = true;
293 else if (opt == 's')
294 seed = strtoul(optarg, NULL, 0);
295 else if (opt == 'v')
296 test_verbose++;
297 }
298
299 printf("random seed %u\n", seed);
300 srand(seed);
301
302 printf("running tests\n");
303
304 rcu_register_thread();
305 radix_tree_init();
306
307 xarray_tests();
308 regression1_test();
309 regression2_test();
310 regression3_test();
311 regression4_test();
312 iteration_test(0, 10 + 90 * long_run);
313 iteration_test(7, 10 + 90 * long_run);
314 iteration_test2(10 + 90 * long_run);
315 single_thread_tests(long_run);
316
317 /* Free any remaining preallocated nodes */
318 radix_tree_cpu_dead(0);
319
320 benchmark();
321
322 rcu_barrier();
323 printv(2, "after rcu_barrier: %d allocated, preempt %d\n",
324 nr_allocated, preempt_count);
325 rcu_unregister_thread();
326
327 printf("tests completed\n");
328
329 exit(0);
330}