summaryrefslogtreecommitdiffstats
path: root/tools/testing/radix-tree/main.c
blob: 584a8732f5ceae518faebb1dbb4cf940af65291a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <assert.h>
#include <limits.h>

#include <linux/slab.h>
#include <linux/radix-tree.h>

#include "test.h"
#include "regression.h"

void __gang_check(unsigned long middle, long down, long up, int chunk, int hop)
{
	long idx;
	RADIX_TREE(tree, GFP_KERNEL);

	middle = 1 << 30;

	for (idx = -down; idx < up; idx++)
		item_insert(&tree, middle + idx);

	item_check_absent(&tree, middle - down - 1);
	for (idx = -down; idx < up; idx++)
		item_check_present(&tree, middle + idx);
	item_check_absent(&tree, middle + up);

	if (chunk > 0) {
		item_gang_check_present(&tree, middle - down, up + down,
				chunk, hop);
		item_full_scan(&tree, middle - down, down + up, chunk);
	}
	item_kill_tree(&tree);
}

void gang_check(void)
{
	__gang_check(1UL << 30, 128, 128, 35, 2);
	__gang_check(1UL << 31, 128, 128, 32, 32);
	__gang_check(1UL << 31, 128, 128, 32, 100);
	__gang_check(1UL << 31, 128, 128, 17, 7);
	__gang_check(0xffff0000UL, 0, 65536, 17, 7);
	__gang_check(0xfffffffeUL, 1, 1, 17, 7);
}

void __big_gang_check(void)
{
	unsigned long start;
	int wrapped = 0;

	start = 0;
	do {
		unsigned long old_start;

//		printf("0x%08lx\n", start);
		__gang_check(start, rand() % 113 + 1, rand() % 71,
				rand() % 157, rand() % 91 + 1);
		old_start = start;
		start += rand() % 1000000;
		start %= 1ULL << 33;
		if (start < old_start)
			wrapped = 1;
	} while (!wrapped);
}

void big_gang_check(bool long_run)
{
	int i;

	for (i = 0; i < (long_run ? 1000 : 3); i++) {
		__big_gang_check();
		printv(2, "%d ", i);
		fflush(stdout);
	}
}

void add_and_check(void)
{
	RADIX_TREE(tree, GFP_KERNEL);

	item_insert(&tree, 44);
	item_check_present(&tree, 44);
	item_check_absent(&tree, 43);
	item_kill_tree(&tree);
}

void dynamic_height_check(void)
{
	int i;
	RADIX_TREE(tree, GFP_KERNEL);
	tree_verify_min_height(&tree, 0);

	item_insert(&tree, 42);
	tree_verify_min_height(&tree, 42);

	item_insert(&tree, 1000000);
	tree_verify_min_height(&tree, 1000000);

	assert(item_delete(&tree, 1000000));
	tree_verify_min_height(&tree, 42);

	assert(item_delete(&tree, 42));
	tree_verify_min_height(&tree, 0);

	for (i = 0; i < 1000; i++) {
		item_insert(&tree, i);
		tree_verify_min_height(&tree, i);
	}

	i--;
	for (;;) {
		assert(item_delete(&tree, i));
		if (i == 0) {
			tree_verify_min_height(&tree, 0);
			break;
		}
		i--;
		tree_verify_min_height(&tree, i);
	}

	item_kill_tree(&tree);
}

void check_copied_tags(struct radix_tree_root *tree, unsigned long start, unsigned long end, unsigned long *idx, int count, int fromtag, int totag)
{
	int i;

	for (i = 0; i < count; i++) {
/*		if (i % 1000 == 0)
			putchar('.'); */
		if (idx[i] < start || idx[i] > end) {
			if (item_tag_get(tree, idx[i], totag)) {
				printv(2, "%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));
			}
			assert(!item_tag_get(tree, idx[i], totag));
			continue;
		}
		if (item_tag_get(tree, idx[i], fromtag) ^
			item_tag_get(tree, idx[i], totag)) {
			printv(2, "%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));
		}
		assert(!(item_tag_get(tree, idx[i], fromtag) ^
			 item_tag_get(tree, idx[i], totag)));
	}
}

#define ITEMS 50000

void copy_tag_check(void)
{
	RADIX_TREE(tree, GFP_KERNEL);
	unsigned long idx[ITEMS];
	unsigned long start, end, count = 0, tagged, cur, tmp;
	int i;

//	printf("generating radix tree indices...\n");
	start = rand();
	end = rand();
	if (start > end && (rand() % 10)) {
		cur = start;
		start = end;
		end = cur;
	}
	/* Specifically create items around the start and the end of the range
	 * with high probability to check for off by one errors */
	cur = rand();
	if (cur & 1) {
		item_insert(&tree, start);
		if (cur & 2) {
			if (start <= end)
				count++;
			item_tag_set(&tree, start, 0);
		}
	}
	if (cur & 4) {
		item_insert(&tree, start-1);
		if (cur & 8)
			item_tag_set(&tree, start-1, 0);
	}
	if (cur & 16) {
		item_insert(&tree, end);
		if (cur & 32) {
			if (start <= end)
				count++;
			item_tag_set(&tree, end, 0);
		}
	}
	if (cur & 64) {
		item_insert(&tree, end+1);
		if (cur & 128)
			item_tag_set(&tree, end+1, 0);
	}

	for (i = 0; i < ITEMS; i++) {
		do {
			idx[i] = rand();
		} while (item_lookup(&tree, idx[i]));

		item_insert(&tree, idx[i]);
		if (rand() & 1) {
			item_tag_set(&tree, idx[i], 0);
			if (idx[i] >= start && idx[i] <= end)
				count++;
		}
/*		if (i % 1000 == 0)
			putchar('.'); */
	}

//	printf("\ncopying tags...\n");
	tagged = tag_tagged_items(&tree, NULL, start, end, ITEMS, 0, 1);

//	printf("checking copied tags\n");
	assert(tagged == count);
	check_copied_tags(&tree, start, end, idx, ITEMS, 0, 1);

	/* Copy tags in several rounds */
//	printf("\ncopying tags...\n");
	tmp = rand() % (count / 10 + 2);
	tagged = tag_tagged_items(&tree, NULL, start, end, tmp, 0, 2);
	assert(tagged == count);

//	printf("%lu %lu %lu\n", tagged, tmp, count);
//	printf("checking copied tags\n");
	check_copied_tags(&tree, start, end, idx, ITEMS, 0, 2);
	verify_tag_consistency(&tree, 0);
	verify_tag_consistency(&tree, 1);
	verify_tag_consistency(&tree, 2);
//	printf("\n");
	item_kill_tree(&tree);
}

static void __locate_check(struct radix_tree_root *tree, unsigned long index,
			unsigned order)
{
	struct item *item;
	unsigned long index2;

	item_insert_order(tree, index, order);
	item = item_lookup(tree, index);
	index2 = find_item(tree, item);
	if (index != index2) {
		printv(2, "index %ld order %d inserted; found %ld\n",
			index, order, index2);
		abort();
	}
}

static void __order_0_locate_check(void)
{
	RADIX_TREE(tree, GFP_KERNEL);
	int i;

	for (i = 0; i < 50; i++)
		__locate_check(&tree, rand() % INT_MAX, 0);

	item_kill_tree(&tree);
}

static void locate_check(void)
{
	RADIX_TREE(tree, GFP_KERNEL);
	unsigned order;
	unsigned long offset, index;

	__order_0_locate_check();

	for (order = 0; order < 20; order++) {
		for (offset = 0; offset < (1 << (order + 3));
		     offset += (1UL << order)) {
			for (index = 0; index < (1UL << (order + 5));
			     index += (1UL << order)) {
				__locate_check(&tree, index + offset, order);
			}
			if (find_item(&tree, &tree) != -1)
				abort();

			item_kill_tree(&tree);
		}
	}

	if (find_item(&tree, &tree) != -1)
		abort();
	__locate_check(&tree, -1, 0);
	if (find_item(&tree, &tree) != -1)
		abort();
	item_kill_tree(&tree);
}

static void single_thread_tests(bool long_run)
{
	int i;

	printv(1, "starting single_thread_tests: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	multiorder_checks();
	rcu_barrier();
	printv(2, "after multiorder_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	locate_check();
	rcu_barrier();
	printv(2, "after locate_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	tag_check();
	rcu_barrier();
	printv(2, "after tag_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	gang_check();
	rcu_barrier();
	printv(2, "after gang_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	add_and_check();
	rcu_barrier();
	printv(2, "after add_and_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	dynamic_height_check();
	rcu_barrier();
	printv(2, "after dynamic_height_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	idr_checks();
	ida_checks();
	rcu_barrier();
	printv(2, "after idr_checks: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	big_gang_check(long_run);
	rcu_barrier();
	printv(2, "after big_gang_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	for (i = 0; i < (long_run ? 2000 : 3); i++) {
		copy_tag_check();
		printv(2, "%d ", i);
		fflush(stdout);
	}
	rcu_barrier();
	printv(2, "after copy_tag_check: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
}

int main(int argc, char **argv)
{
	bool long_run = false;
	int opt;
	unsigned int seed = time(NULL);

	while ((opt = getopt(argc, argv, "ls:v")) != -1) {
		if (opt == 'l')
			long_run = true;
		else if (opt == 's')
			seed = strtoul(optarg, NULL, 0);
		else if (opt == 'v')
			test_verbose++;
	}

	printf("random seed %u\n", seed);
	srand(seed);

	printf("running tests\n");

	rcu_register_thread();
	radix_tree_init();

	regression1_test();
	regression2_test();
	regression3_test();
	iteration_test(0, 10 + 90 * long_run);
	iteration_test(7, 10 + 90 * long_run);
	single_thread_tests(long_run);
	ida_thread_tests();

	/* Free any remaining preallocated nodes */
	radix_tree_cpu_dead(0);

	benchmark();

	rcu_barrier();
	printv(2, "after rcu_barrier: %d allocated, preempt %d\n",
		nr_allocated, preempt_count);
	rcu_unregister_thread();

	printf("tests completed\n");

	exit(0);
}