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1#include <stdio.h>
2#include <stdlib.h>
3#include <unistd.h>
4#include <time.h>
5#include <assert.h>
6
7#include <linux/slab.h>
8#include <linux/radix-tree.h>
9
10#include "test.h"
11#include "regression.h"
12
13void __gang_check(unsigned long middle, long down, long up, int chunk, int hop)
14{
15 long idx;
16 RADIX_TREE(tree, GFP_KERNEL);
17
18 middle = 1 << 30;
19
20 for (idx = -down; idx < up; idx++)
21 item_insert(&tree, middle + idx);
22
23 item_check_absent(&tree, middle - down - 1);
24 for (idx = -down; idx < up; idx++)
25 item_check_present(&tree, middle + idx);
26 item_check_absent(&tree, middle + up);
27
28 item_gang_check_present(&tree, middle - down,
29 up + down, chunk, hop);
30 item_full_scan(&tree, middle - down, down + up, chunk);
31 item_kill_tree(&tree);
32}
33
34void gang_check(void)
35{
36 __gang_check(1 << 30, 128, 128, 35, 2);
37 __gang_check(1 << 31, 128, 128, 32, 32);
38 __gang_check(1 << 31, 128, 128, 32, 100);
39 __gang_check(1 << 31, 128, 128, 17, 7);
40 __gang_check(0xffff0000, 0, 65536, 17, 7);
41 __gang_check(0xfffffffe, 1, 1, 17, 7);
42}
43
44void __big_gang_check(void)
45{
46 unsigned long start;
47 int wrapped = 0;
48
49 start = 0;
50 do {
51 unsigned long old_start;
52
53// printf("0x%08lx\n", start);
54 __gang_check(start, rand() % 113 + 1, rand() % 71,
55 rand() % 157, rand() % 91 + 1);
56 old_start = start;
57 start += rand() % 1000000;
58 start %= 1ULL << 33;
59 if (start < old_start)
60 wrapped = 1;
61 } while (!wrapped);
62}
63
64void big_gang_check(bool long_run)
65{
66 int i;
67
68 for (i = 0; i < (long_run ? 1000 : 3); i++) {
69 __big_gang_check();
70 printf("%d ", i);
71 fflush(stdout);
72 }
73}
74
75void add_and_check(void)
76{
77 RADIX_TREE(tree, GFP_KERNEL);
78
79 item_insert(&tree, 44);
80 item_check_present(&tree, 44);
81 item_check_absent(&tree, 43);
82 item_kill_tree(&tree);
83}
84
85void dynamic_height_check(void)
86{
87 int i;
88 RADIX_TREE(tree, GFP_KERNEL);
89 tree_verify_min_height(&tree, 0);
90
91 item_insert(&tree, 42);
92 tree_verify_min_height(&tree, 42);
93
94 item_insert(&tree, 1000000);
95 tree_verify_min_height(&tree, 1000000);
96
97 assert(item_delete(&tree, 1000000));
98 tree_verify_min_height(&tree, 42);
99
100 assert(item_delete(&tree, 42));
101 tree_verify_min_height(&tree, 0);
102
103 for (i = 0; i < 1000; i++) {
104 item_insert(&tree, i);
105 tree_verify_min_height(&tree, i);
106 }
107
108 i--;
109 for (;;) {
110 assert(item_delete(&tree, i));
111 if (i == 0) {
112 tree_verify_min_height(&tree, 0);
113 break;
114 }
115 i--;
116 tree_verify_min_height(&tree, i);
117 }
118
119 item_kill_tree(&tree);
120}
121
122void check_copied_tags(struct radix_tree_root *tree, unsigned long start, unsigned long end, unsigned long *idx, int count, int fromtag, int totag)
123{
124 int i;
125
126 for (i = 0; i < count; i++) {
127/* if (i % 1000 == 0)
128 putchar('.'); */
129 if (idx[i] < start || idx[i] > end) {
130 if (item_tag_get(tree, idx[i], totag)) {
131 printf("%lu-%lu: %lu, tags %d-%d\n", start, end, idx[i], item_tag_get(tree, idx[i], fromtag), item_tag_get(tree, idx[i], totag));
132 }
133 assert(!item_tag_get(tree, idx[i], totag));
134 continue;
135 }
136 if (item_tag_get(tree, idx[i], fromtag) ^
137 item_tag_get(tree, idx[i], totag)) {
138 printf("%lu-%lu: %lu, tags %d-%d\n", start, end, idx[i], item_tag_get(tree, idx[i], fromtag), item_tag_get(tree, idx[i], totag));
139 }
140 assert(!(item_tag_get(tree, idx[i], fromtag) ^
141 item_tag_get(tree, idx[i], totag)));
142 }
143}
144
145#define ITEMS 50000
146
147void copy_tag_check(void)
148{
149 RADIX_TREE(tree, GFP_KERNEL);
150 unsigned long idx[ITEMS];
151 unsigned long start, end, count = 0, tagged, cur, tmp;
152 int i;
153
154// printf("generating radix tree indices...\n");
155 start = rand();
156 end = rand();
157 if (start > end && (rand() % 10)) {
158 cur = start;
159 start = end;
160 end = cur;
161 }
162 /* Specifically create items around the start and the end of the range
163 * with high probability to check for off by one errors */
164 cur = rand();
165 if (cur & 1) {
166 item_insert(&tree, start);
167 if (cur & 2) {
168 if (start <= end)
169 count++;
170 item_tag_set(&tree, start, 0);
171 }
172 }
173 if (cur & 4) {
174 item_insert(&tree, start-1);
175 if (cur & 8)
176 item_tag_set(&tree, start-1, 0);
177 }
178 if (cur & 16) {
179 item_insert(&tree, end);
180 if (cur & 32) {
181 if (start <= end)
182 count++;
183 item_tag_set(&tree, end, 0);
184 }
185 }
186 if (cur & 64) {
187 item_insert(&tree, end+1);
188 if (cur & 128)
189 item_tag_set(&tree, end+1, 0);
190 }
191
192 for (i = 0; i < ITEMS; i++) {
193 do {
194 idx[i] = rand();
195 } while (item_lookup(&tree, idx[i]));
196
197 item_insert(&tree, idx[i]);
198 if (rand() & 1) {
199 item_tag_set(&tree, idx[i], 0);
200 if (idx[i] >= start && idx[i] <= end)
201 count++;
202 }
203/* if (i % 1000 == 0)
204 putchar('.'); */
205 }
206
207// printf("\ncopying tags...\n");
208 tagged = tag_tagged_items(&tree, NULL, start, end, ITEMS, 0, 1);
209
210// printf("checking copied tags\n");
211 assert(tagged == count);
212 check_copied_tags(&tree, start, end, idx, ITEMS, 0, 1);
213
214 /* Copy tags in several rounds */
215// printf("\ncopying tags...\n");
216 tmp = rand() % (count / 10 + 2);
217 tagged = tag_tagged_items(&tree, NULL, start, end, tmp, 0, 2);
218 assert(tagged == count);
219
220// printf("%lu %lu %lu\n", tagged, tmp, count);
221// printf("checking copied tags\n");
222 check_copied_tags(&tree, start, end, idx, ITEMS, 0, 2);
223 verify_tag_consistency(&tree, 0);
224 verify_tag_consistency(&tree, 1);
225 verify_tag_consistency(&tree, 2);
226// printf("\n");
227 item_kill_tree(&tree);
228}
229
230static void __locate_check(struct radix_tree_root *tree, unsigned long index,
231 unsigned order)
232{
233 struct item *item;
234 unsigned long index2;
235
236 item_insert_order(tree, index, order);
237 item = item_lookup(tree, index);
238 index2 = find_item(tree, item);
239 if (index != index2) {
240 printf("index %ld order %d inserted; found %ld\n",
241 index, order, index2);
242 abort();
243 }
244}
245
246static void __order_0_locate_check(void)
247{
248 RADIX_TREE(tree, GFP_KERNEL);
249 int i;
250
251 for (i = 0; i < 50; i++)
252 __locate_check(&tree, rand() % INT_MAX, 0);
253
254 item_kill_tree(&tree);
255}
256
257static void locate_check(void)
258{
259 RADIX_TREE(tree, GFP_KERNEL);
260 unsigned order;
261 unsigned long offset, index;
262
263 __order_0_locate_check();
264
265 for (order = 0; order < 20; order++) {
266 for (offset = 0; offset < (1 << (order + 3));
267 offset += (1UL << order)) {
268 for (index = 0; index < (1UL << (order + 5));
269 index += (1UL << order)) {
270 __locate_check(&tree, index + offset, order);
271 }
272 if (find_item(&tree, &tree) != -1)
273 abort();
274
275 item_kill_tree(&tree);
276 }
277 }
278
279 if (find_item(&tree, &tree) != -1)
280 abort();
281 __locate_check(&tree, -1, 0);
282 if (find_item(&tree, &tree) != -1)
283 abort();
284 item_kill_tree(&tree);
285}
286
287static void single_thread_tests(bool long_run)
288{
289 int i;
290
291 printf("starting single_thread_tests: %d allocated, preempt %d\n",
292 nr_allocated, preempt_count);
293 multiorder_checks();
294 rcu_barrier();
295 printf("after multiorder_check: %d allocated, preempt %d\n",
296 nr_allocated, preempt_count);
297 locate_check();
298 rcu_barrier();
299 printf("after locate_check: %d allocated, preempt %d\n",
300 nr_allocated, preempt_count);
301 tag_check();
302 rcu_barrier();
303 printf("after tag_check: %d allocated, preempt %d\n",
304 nr_allocated, preempt_count);
305 gang_check();
306 rcu_barrier();
307 printf("after gang_check: %d allocated, preempt %d\n",
308 nr_allocated, preempt_count);
309 add_and_check();
310 rcu_barrier();
311 printf("after add_and_check: %d allocated, preempt %d\n",
312 nr_allocated, preempt_count);
313 dynamic_height_check();
314 rcu_barrier();
315 printf("after dynamic_height_check: %d allocated, preempt %d\n",
316 nr_allocated, preempt_count);
317 big_gang_check(long_run);
318 rcu_barrier();
319 printf("after big_gang_check: %d allocated, preempt %d\n",
320 nr_allocated, preempt_count);
321 for (i = 0; i < (long_run ? 2000 : 3); i++) {
322 copy_tag_check();
323 printf("%d ", i);
324 fflush(stdout);
325 }
326 rcu_barrier();
327 printf("after copy_tag_check: %d allocated, preempt %d\n",
328 nr_allocated, preempt_count);
329}
330
331int main(int argc, char **argv)
332{
333 bool long_run = false;
334 int opt;
335 unsigned int seed = time(NULL);
336
337 while ((opt = getopt(argc, argv, "ls:")) != -1) {
338 if (opt == 'l')
339 long_run = true;
340 else if (opt == 's')
341 seed = strtoul(optarg, NULL, 0);
342 }
343
344 printf("random seed %u\n", seed);
345 srand(seed);
346
347 rcu_register_thread();
348 radix_tree_init();
349
350 regression1_test();
351 regression2_test();
352 regression3_test();
353 iteration_test(0, 10);
354 iteration_test(7, 20);
355 single_thread_tests(long_run);
356
357 /* Free any remaining preallocated nodes */
358 radix_tree_cpu_dead(0);
359
360 benchmark();
361
362 rcu_barrier();
363 printf("after rcu_barrier: %d allocated, preempt %d\n",
364 nr_allocated, preempt_count);
365 rcu_unregister_thread();
366
367 exit(0);
368}