summaryrefslogtreecommitdiffstats
path: root/samples/bpf/map_perf_test_user.c
blob: 1a8894b5ac5147c36833ffae500ddfbeb00277d1 (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
/* Copyright (c) 2016 Facebook
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#define _GNU_SOURCE
#include <sched.h>
#include <stdio.h>
#include <sys/types.h>
#include <asm/unistd.h>
#include <unistd.h>
#include <assert.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <signal.h>
#include <linux/bpf.h>
#include <string.h>
#include <time.h>
#include <sys/resource.h>
#include <arpa/inet.h>
#include <errno.h>

#include "libbpf.h"
#include "bpf_load.h"

#define TEST_BIT(t) (1U << (t))
#define MAX_NR_CPUS 1024

static __u64 time_get_ns(void)
{
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);
	return ts.tv_sec * 1000000000ull + ts.tv_nsec;
}

enum test_type {
	HASH_PREALLOC,
	PERCPU_HASH_PREALLOC,
	HASH_KMALLOC,
	PERCPU_HASH_KMALLOC,
	LRU_HASH_PREALLOC,
	NOCOMMON_LRU_HASH_PREALLOC,
	LPM_KMALLOC,
	HASH_LOOKUP,
	ARRAY_LOOKUP,
	INNER_LRU_HASH_PREALLOC,
	NR_TESTS,
};

const char *test_map_names[NR_TESTS] = {
	[HASH_PREALLOC] = "hash_map",
	[PERCPU_HASH_PREALLOC] = "percpu_hash_map",
	[HASH_KMALLOC] = "hash_map_alloc",
	[PERCPU_HASH_KMALLOC] = "percpu_hash_map_alloc",
	[LRU_HASH_PREALLOC] = "lru_hash_map",
	[NOCOMMON_LRU_HASH_PREALLOC] = "nocommon_lru_hash_map",
	[LPM_KMALLOC] = "lpm_trie_map_alloc",
	[HASH_LOOKUP] = "hash_map",
	[ARRAY_LOOKUP] = "array_map",
	[INNER_LRU_HASH_PREALLOC] = "inner_lru_hash_map",
};

static int test_flags = ~0;
static uint32_t num_map_entries;
static uint32_t inner_lru_hash_size;
static int inner_lru_hash_idx = -1;
static int array_of_lru_hashs_idx = -1;
static uint32_t max_cnt = 1000000;

static int check_test_flags(enum test_type t)
{
	return test_flags & TEST_BIT(t);
}

static void test_hash_prealloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_getuid);
	printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
	       cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
}

static void do_test_lru(enum test_type test, int cpu)
{
	static int inner_lru_map_fds[MAX_NR_CPUS];

	struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 };
	const char *test_name;
	__u64 start_time;
	int i, ret;

	if (test == INNER_LRU_HASH_PREALLOC) {
		int outer_fd = map_fd[array_of_lru_hashs_idx];

		assert(cpu < MAX_NR_CPUS);

		if (cpu) {
			inner_lru_map_fds[cpu] =
				bpf_create_map(BPF_MAP_TYPE_LRU_HASH,
					       sizeof(uint32_t), sizeof(long),
					       inner_lru_hash_size, 0);
			if (inner_lru_map_fds[cpu] == -1) {
				printf("cannot create BPF_MAP_TYPE_LRU_HASH %s(%d)\n",
				       strerror(errno), errno);
				exit(1);
			}
		} else {
			inner_lru_map_fds[cpu] = map_fd[inner_lru_hash_idx];
		}

		ret = bpf_map_update_elem(outer_fd, &cpu,
					  &inner_lru_map_fds[cpu],
					  BPF_ANY);
		if (ret) {
			printf("cannot update ARRAY_OF_LRU_HASHS with key:%u. %s(%d)\n",
			       cpu, strerror(errno), errno);
			exit(1);
		}
	}

	in6.sin6_addr.s6_addr16[0] = 0xdead;
	in6.sin6_addr.s6_addr16[1] = 0xbeef;

	if (test == LRU_HASH_PREALLOC) {
		test_name = "lru_hash_map_perf";
		in6.sin6_addr.s6_addr16[7] = 0;
	} else if (test == NOCOMMON_LRU_HASH_PREALLOC) {
		test_name = "nocommon_lru_hash_map_perf";
		in6.sin6_addr.s6_addr16[7] = 1;
	} else if (test == INNER_LRU_HASH_PREALLOC) {
		test_name = "inner_lru_hash_map_perf";
		in6.sin6_addr.s6_addr16[7] = 2;
	} else {
		assert(0);
	}

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++) {
		ret = connect(-1, (const struct sockaddr *)&in6, sizeof(in6));
		assert(ret == -1 && errno == EBADF);
	}
	printf("%d:%s pre-alloc %lld events per sec\n",
	       cpu, test_name,
	       max_cnt * 1000000000ll / (time_get_ns() - start_time));
}

static void test_lru_hash_prealloc(int cpu)
{
	do_test_lru(LRU_HASH_PREALLOC, cpu);
}

static void test_nocommon_lru_hash_prealloc(int cpu)
{
	do_test_lru(NOCOMMON_LRU_HASH_PREALLOC, cpu);
}

static void test_inner_lru_hash_prealloc(int cpu)
{
	do_test_lru(INNER_LRU_HASH_PREALLOC, cpu);
}

static void test_percpu_hash_prealloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_geteuid);
	printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
	       cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
}

static void test_hash_kmalloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_getgid);
	printf("%d:hash_map_perf kmalloc %lld events per sec\n",
	       cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
}

static void test_percpu_hash_kmalloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_getegid);
	printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
	       cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
}

static void test_lpm_kmalloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_gettid);
	printf("%d:lpm_perf kmalloc %lld events per sec\n",
	       cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
}

static void test_hash_lookup(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_getpgid, 0);
	printf("%d:hash_lookup %lld lookups per sec\n",
	       cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
}

static void test_array_lookup(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < max_cnt; i++)
		syscall(__NR_getpgrp, 0);
	printf("%d:array_lookup %lld lookups per sec\n",
	       cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
}

typedef void (*test_func)(int cpu);
const test_func test_funcs[] = {
	[HASH_PREALLOC] = test_hash_prealloc,
	[PERCPU_HASH_PREALLOC] = test_percpu_hash_prealloc,
	[HASH_KMALLOC] = test_hash_kmalloc,
	[PERCPU_HASH_KMALLOC] = test_percpu_hash_kmalloc,
	[LRU_HASH_PREALLOC] = test_lru_hash_prealloc,
	[NOCOMMON_LRU_HASH_PREALLOC] = test_nocommon_lru_hash_prealloc,
	[LPM_KMALLOC] = test_lpm_kmalloc,
	[HASH_LOOKUP] = test_hash_lookup,
	[ARRAY_LOOKUP] = test_array_lookup,
	[INNER_LRU_HASH_PREALLOC] = test_inner_lru_hash_prealloc,
};

static void loop(int cpu)
{
	cpu_set_t cpuset;
	int i;

	CPU_ZERO(&cpuset);
	CPU_SET(cpu, &cpuset);
	sched_setaffinity(0, sizeof(cpuset), &cpuset);

	for (i = 0; i < NR_TESTS; i++) {
		if (check_test_flags(i))
			test_funcs[i](cpu);
	}
}

static void run_perf_test(int tasks)
{
	pid_t pid[tasks];
	int i;

	for (i = 0; i < tasks; i++) {
		pid[i] = fork();
		if (pid[i] == 0) {
			loop(i);
			exit(0);
		} else if (pid[i] == -1) {
			printf("couldn't spawn #%d process\n", i);
			exit(1);
		}
	}
	for (i = 0; i < tasks; i++) {
		int status;

		assert(waitpid(pid[i], &status, 0) == pid[i]);
		assert(status == 0);
	}
}

static void fill_lpm_trie(void)
{
	struct bpf_lpm_trie_key *key;
	unsigned long value = 0;
	unsigned int i;
	int r;

	key = alloca(sizeof(*key) + 4);
	key->prefixlen = 32;

	for (i = 0; i < 512; ++i) {
		key->prefixlen = rand() % 33;
		key->data[0] = rand() & 0xff;
		key->data[1] = rand() & 0xff;
		key->data[2] = rand() & 0xff;
		key->data[3] = rand() & 0xff;
		r = bpf_map_update_elem(map_fd[6], key, &value, 0);
		assert(!r);
	}

	key->prefixlen = 32;
	key->data[0] = 192;
	key->data[1] = 168;
	key->data[2] = 0;
	key->data[3] = 1;
	value = 128;

	r = bpf_map_update_elem(map_fd[6], key, &value, 0);
	assert(!r);
}

static void fixup_map(struct bpf_map_data *map, int idx)
{
	int i;

	if (!strcmp("inner_lru_hash_map", map->name)) {
		inner_lru_hash_idx = idx;
		inner_lru_hash_size = map->def.max_entries;
	}

	if (!strcmp("array_of_lru_hashs", map->name)) {
		if (inner_lru_hash_idx == -1) {
			printf("inner_lru_hash_map must be defined before array_of_lru_hashs\n");
			exit(1);
		}
		map->def.inner_map_idx = inner_lru_hash_idx;
		array_of_lru_hashs_idx = idx;
	}

	if (num_map_entries <= 0)
		return;

	inner_lru_hash_size = num_map_entries;

	/* Only change the max_entries for the enabled test(s) */
	for (i = 0; i < NR_TESTS; i++) {
		if (!strcmp(test_map_names[i], map->name) &&
		    (check_test_flags(i))) {
			map->def.max_entries = num_map_entries;
		}
	}
}

int main(int argc, char **argv)
{
	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
	char filename[256];
	int num_cpu = 8;

	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
	setrlimit(RLIMIT_MEMLOCK, &r);

	if (argc > 1)
		test_flags = atoi(argv[1]) ? : test_flags;

	if (argc > 2)
		num_cpu = atoi(argv[2]) ? : num_cpu;

	if (argc > 3)
		num_map_entries = atoi(argv[3]);

	if (argc > 4)
		max_cnt = atoi(argv[4]);

	if (load_bpf_file_fixup_map(filename, fixup_map)) {
		printf("%s", bpf_log_buf);
		return 1;
	}

	fill_lpm_trie();

	run_perf_test(num_cpu);

	return 0;
}