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1// SPDX-License-Identifier: GPL-2.0-only
2/* Copyright (c) 2016 Facebook
3 */
4#define _GNU_SOURCE
5#include <sched.h>
6#include <stdio.h>
7#include <sys/types.h>
8#include <asm/unistd.h>
9#include <unistd.h>
10#include <assert.h>
11#include <sys/wait.h>
12#include <stdlib.h>
13#include <signal.h>
14#include <string.h>
15#include <time.h>
16#include <arpa/inet.h>
17#include <errno.h>
18
19#include <bpf/bpf.h>
20#include <bpf/libbpf.h>
21
22#define TEST_BIT(t) (1U << (t))
23#define MAX_NR_CPUS 1024
24
25static __u64 time_get_ns(void)
26{
27 struct timespec ts;
28
29 clock_gettime(CLOCK_MONOTONIC, &ts);
30 return ts.tv_sec * 1000000000ull + ts.tv_nsec;
31}
32
33enum test_type {
34 HASH_PREALLOC,
35 PERCPU_HASH_PREALLOC,
36 HASH_KMALLOC,
37 PERCPU_HASH_KMALLOC,
38 LRU_HASH_PREALLOC,
39 NOCOMMON_LRU_HASH_PREALLOC,
40 LPM_KMALLOC,
41 HASH_LOOKUP,
42 ARRAY_LOOKUP,
43 INNER_LRU_HASH_PREALLOC,
44 LRU_HASH_LOOKUP,
45 NR_TESTS,
46};
47
48const char *test_map_names[NR_TESTS] = {
49 [HASH_PREALLOC] = "hash_map",
50 [PERCPU_HASH_PREALLOC] = "percpu_hash_map",
51 [HASH_KMALLOC] = "hash_map_alloc",
52 [PERCPU_HASH_KMALLOC] = "percpu_hash_map_alloc",
53 [LRU_HASH_PREALLOC] = "lru_hash_map",
54 [NOCOMMON_LRU_HASH_PREALLOC] = "nocommon_lru_hash_map",
55 [LPM_KMALLOC] = "lpm_trie_map_alloc",
56 [HASH_LOOKUP] = "hash_map",
57 [ARRAY_LOOKUP] = "array_map",
58 [INNER_LRU_HASH_PREALLOC] = "inner_lru_hash_map",
59 [LRU_HASH_LOOKUP] = "lru_hash_lookup_map",
60};
61
62enum map_idx {
63 array_of_lru_hashs_idx,
64 hash_map_alloc_idx,
65 lru_hash_lookup_idx,
66 NR_IDXES,
67};
68
69static int map_fd[NR_IDXES];
70
71static int test_flags = ~0;
72static uint32_t num_map_entries;
73static uint32_t inner_lru_hash_size;
74static int lru_hash_lookup_test_entries = 32;
75static uint32_t max_cnt = 10000;
76
77static int check_test_flags(enum test_type t)
78{
79 return test_flags & TEST_BIT(t);
80}
81
82static void test_hash_prealloc(int cpu)
83{
84 __u64 start_time;
85 int i;
86
87 start_time = time_get_ns();
88 for (i = 0; i < max_cnt; i++)
89 syscall(__NR_getuid);
90 printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
91 cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
92}
93
94static int pre_test_lru_hash_lookup(int tasks)
95{
96 int fd = map_fd[lru_hash_lookup_idx];
97 uint32_t key;
98 long val = 1;
99 int ret;
100
101 if (num_map_entries > lru_hash_lookup_test_entries)
102 lru_hash_lookup_test_entries = num_map_entries;
103
104 /* Populate the lru_hash_map for LRU_HASH_LOOKUP perf test.
105 *
106 * It is fine that the user requests for a map with
107 * num_map_entries < 32 and some of the later lru hash lookup
108 * may return not found. For LRU map, we are not interested
109 * in such small map performance.
110 */
111 for (key = 0; key < lru_hash_lookup_test_entries; key++) {
112 ret = bpf_map_update_elem(fd, &key, &val, BPF_NOEXIST);
113 if (ret)
114 return ret;
115 }
116
117 return 0;
118}
119
120static void do_test_lru(enum test_type test, int cpu)
121{
122 static int inner_lru_map_fds[MAX_NR_CPUS];
123
124 struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 };
125 const char *test_name;
126 __u64 start_time;
127 int i, ret;
128
129 if (test == INNER_LRU_HASH_PREALLOC && cpu) {
130 /* If CPU is not 0, create inner_lru hash map and insert the fd
131 * value into the array_of_lru_hash map. In case of CPU 0,
132 * 'inner_lru_hash_map' was statically inserted on the map init
133 */
134 int outer_fd = map_fd[array_of_lru_hashs_idx];
135 unsigned int mycpu, mynode;
136 LIBBPF_OPTS(bpf_map_create_opts, opts,
137 .map_flags = BPF_F_NUMA_NODE,
138 );
139
140 assert(cpu < MAX_NR_CPUS);
141
142 ret = syscall(__NR_getcpu, &mycpu, &mynode, NULL);
143 assert(!ret);
144
145 opts.numa_node = mynode;
146 inner_lru_map_fds[cpu] =
147 bpf_map_create(BPF_MAP_TYPE_LRU_HASH,
148 test_map_names[INNER_LRU_HASH_PREALLOC],
149 sizeof(uint32_t),
150 sizeof(long),
151 inner_lru_hash_size, &opts);
152 if (inner_lru_map_fds[cpu] == -1) {
153 printf("cannot create BPF_MAP_TYPE_LRU_HASH %s(%d)\n",
154 strerror(errno), errno);
155 exit(1);
156 }
157
158 ret = bpf_map_update_elem(outer_fd, &cpu,
159 &inner_lru_map_fds[cpu],
160 BPF_ANY);
161 if (ret) {
162 printf("cannot update ARRAY_OF_LRU_HASHS with key:%u. %s(%d)\n",
163 cpu, strerror(errno), errno);
164 exit(1);
165 }
166 }
167
168 in6.sin6_addr.s6_addr16[0] = 0xdead;
169 in6.sin6_addr.s6_addr16[1] = 0xbeef;
170
171 if (test == LRU_HASH_PREALLOC) {
172 test_name = "lru_hash_map_perf";
173 in6.sin6_addr.s6_addr16[2] = 0;
174 } else if (test == NOCOMMON_LRU_HASH_PREALLOC) {
175 test_name = "nocommon_lru_hash_map_perf";
176 in6.sin6_addr.s6_addr16[2] = 1;
177 } else if (test == INNER_LRU_HASH_PREALLOC) {
178 test_name = "inner_lru_hash_map_perf";
179 in6.sin6_addr.s6_addr16[2] = 2;
180 } else if (test == LRU_HASH_LOOKUP) {
181 test_name = "lru_hash_lookup_perf";
182 in6.sin6_addr.s6_addr16[2] = 3;
183 in6.sin6_addr.s6_addr32[3] = 0;
184 } else {
185 assert(0);
186 }
187
188 start_time = time_get_ns();
189 for (i = 0; i < max_cnt; i++) {
190 ret = connect(-1, (const struct sockaddr *)&in6, sizeof(in6));
191 assert(ret == -1 && errno == EBADF);
192 if (in6.sin6_addr.s6_addr32[3] <
193 lru_hash_lookup_test_entries - 32)
194 in6.sin6_addr.s6_addr32[3] += 32;
195 else
196 in6.sin6_addr.s6_addr32[3] = 0;
197 }
198 printf("%d:%s pre-alloc %lld events per sec\n",
199 cpu, test_name,
200 max_cnt * 1000000000ll / (time_get_ns() - start_time));
201}
202
203static void test_lru_hash_prealloc(int cpu)
204{
205 do_test_lru(LRU_HASH_PREALLOC, cpu);
206}
207
208static void test_nocommon_lru_hash_prealloc(int cpu)
209{
210 do_test_lru(NOCOMMON_LRU_HASH_PREALLOC, cpu);
211}
212
213static void test_inner_lru_hash_prealloc(int cpu)
214{
215 do_test_lru(INNER_LRU_HASH_PREALLOC, cpu);
216}
217
218static void test_lru_hash_lookup(int cpu)
219{
220 do_test_lru(LRU_HASH_LOOKUP, cpu);
221}
222
223static void test_percpu_hash_prealloc(int cpu)
224{
225 __u64 start_time;
226 int i;
227
228 start_time = time_get_ns();
229 for (i = 0; i < max_cnt; i++)
230 syscall(__NR_geteuid);
231 printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
232 cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
233}
234
235static void test_hash_kmalloc(int cpu)
236{
237 __u64 start_time;
238 int i;
239
240 start_time = time_get_ns();
241 for (i = 0; i < max_cnt; i++)
242 syscall(__NR_getgid);
243 printf("%d:hash_map_perf kmalloc %lld events per sec\n",
244 cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
245}
246
247static void test_percpu_hash_kmalloc(int cpu)
248{
249 __u64 start_time;
250 int i;
251
252 start_time = time_get_ns();
253 for (i = 0; i < max_cnt; i++)
254 syscall(__NR_getegid);
255 printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
256 cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
257}
258
259static void test_lpm_kmalloc(int cpu)
260{
261 __u64 start_time;
262 int i;
263
264 start_time = time_get_ns();
265 for (i = 0; i < max_cnt; i++)
266 syscall(__NR_gettid);
267 printf("%d:lpm_perf kmalloc %lld events per sec\n",
268 cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
269}
270
271static void test_hash_lookup(int cpu)
272{
273 __u64 start_time;
274 int i;
275
276 start_time = time_get_ns();
277 for (i = 0; i < max_cnt; i++)
278 syscall(__NR_getpgid, 0);
279 printf("%d:hash_lookup %lld lookups per sec\n",
280 cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
281}
282
283static void test_array_lookup(int cpu)
284{
285 __u64 start_time;
286 int i;
287
288 start_time = time_get_ns();
289 for (i = 0; i < max_cnt; i++)
290 syscall(__NR_getppid, 0);
291 printf("%d:array_lookup %lld lookups per sec\n",
292 cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
293}
294
295typedef int (*pre_test_func)(int tasks);
296const pre_test_func pre_test_funcs[] = {
297 [LRU_HASH_LOOKUP] = pre_test_lru_hash_lookup,
298};
299
300typedef void (*test_func)(int cpu);
301const test_func test_funcs[] = {
302 [HASH_PREALLOC] = test_hash_prealloc,
303 [PERCPU_HASH_PREALLOC] = test_percpu_hash_prealloc,
304 [HASH_KMALLOC] = test_hash_kmalloc,
305 [PERCPU_HASH_KMALLOC] = test_percpu_hash_kmalloc,
306 [LRU_HASH_PREALLOC] = test_lru_hash_prealloc,
307 [NOCOMMON_LRU_HASH_PREALLOC] = test_nocommon_lru_hash_prealloc,
308 [LPM_KMALLOC] = test_lpm_kmalloc,
309 [HASH_LOOKUP] = test_hash_lookup,
310 [ARRAY_LOOKUP] = test_array_lookup,
311 [INNER_LRU_HASH_PREALLOC] = test_inner_lru_hash_prealloc,
312 [LRU_HASH_LOOKUP] = test_lru_hash_lookup,
313};
314
315static int pre_test(int tasks)
316{
317 int i;
318
319 for (i = 0; i < NR_TESTS; i++) {
320 if (pre_test_funcs[i] && check_test_flags(i)) {
321 int ret = pre_test_funcs[i](tasks);
322
323 if (ret)
324 return ret;
325 }
326 }
327
328 return 0;
329}
330
331static void loop(int cpu)
332{
333 cpu_set_t cpuset;
334 int i;
335
336 CPU_ZERO(&cpuset);
337 CPU_SET(cpu, &cpuset);
338 sched_setaffinity(0, sizeof(cpuset), &cpuset);
339
340 for (i = 0; i < NR_TESTS; i++) {
341 if (check_test_flags(i))
342 test_funcs[i](cpu);
343 }
344}
345
346static void run_perf_test(int tasks)
347{
348 pid_t pid[tasks];
349 int i;
350
351 assert(!pre_test(tasks));
352
353 for (i = 0; i < tasks; i++) {
354 pid[i] = fork();
355 if (pid[i] == 0) {
356 loop(i);
357 exit(0);
358 } else if (pid[i] == -1) {
359 printf("couldn't spawn #%d process\n", i);
360 exit(1);
361 }
362 }
363 for (i = 0; i < tasks; i++) {
364 int status;
365
366 assert(waitpid(pid[i], &status, 0) == pid[i]);
367 assert(status == 0);
368 }
369}
370
371static void fill_lpm_trie(void)
372{
373 struct bpf_lpm_trie_key_u8 *key;
374 unsigned long value = 0;
375 unsigned int i;
376 int r;
377
378 key = alloca(sizeof(*key) + 4);
379 key->prefixlen = 32;
380
381 for (i = 0; i < 512; ++i) {
382 key->prefixlen = rand() % 33;
383 key->data[0] = rand() & 0xff;
384 key->data[1] = rand() & 0xff;
385 key->data[2] = rand() & 0xff;
386 key->data[3] = rand() & 0xff;
387 r = bpf_map_update_elem(map_fd[hash_map_alloc_idx],
388 key, &value, 0);
389 assert(!r);
390 }
391
392 key->prefixlen = 32;
393 key->data[0] = 192;
394 key->data[1] = 168;
395 key->data[2] = 0;
396 key->data[3] = 1;
397 value = 128;
398
399 r = bpf_map_update_elem(map_fd[hash_map_alloc_idx], key, &value, 0);
400 assert(!r);
401}
402
403static void fixup_map(struct bpf_object *obj)
404{
405 struct bpf_map *map;
406 int i;
407
408 bpf_object__for_each_map(map, obj) {
409 const char *name = bpf_map__name(map);
410
411 /* Only change the max_entries for the enabled test(s) */
412 for (i = 0; i < NR_TESTS; i++) {
413 if (!strcmp(test_map_names[i], name) &&
414 (check_test_flags(i))) {
415 bpf_map__set_max_entries(map, num_map_entries);
416 continue;
417 }
418 }
419 }
420
421 inner_lru_hash_size = num_map_entries;
422}
423
424int main(int argc, char **argv)
425{
426 int nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
427 struct bpf_link *links[8];
428 struct bpf_program *prog;
429 struct bpf_object *obj;
430 struct bpf_map *map;
431 char filename[256];
432 int i = 0;
433
434 if (argc > 1)
435 test_flags = atoi(argv[1]) ? : test_flags;
436
437 if (argc > 2)
438 nr_cpus = atoi(argv[2]) ? : nr_cpus;
439
440 if (argc > 3)
441 num_map_entries = atoi(argv[3]);
442
443 if (argc > 4)
444 max_cnt = atoi(argv[4]);
445
446 snprintf(filename, sizeof(filename), "%s.bpf.o", argv[0]);
447 obj = bpf_object__open_file(filename, NULL);
448 if (libbpf_get_error(obj)) {
449 fprintf(stderr, "ERROR: opening BPF object file failed\n");
450 return 0;
451 }
452
453 map = bpf_object__find_map_by_name(obj, "inner_lru_hash_map");
454 if (libbpf_get_error(map)) {
455 fprintf(stderr, "ERROR: finding a map in obj file failed\n");
456 goto cleanup;
457 }
458
459 inner_lru_hash_size = bpf_map__max_entries(map);
460 if (!inner_lru_hash_size) {
461 fprintf(stderr, "ERROR: failed to get map attribute\n");
462 goto cleanup;
463 }
464
465 /* resize BPF map prior to loading */
466 if (num_map_entries > 0)
467 fixup_map(obj);
468
469 /* load BPF program */
470 if (bpf_object__load(obj)) {
471 fprintf(stderr, "ERROR: loading BPF object file failed\n");
472 goto cleanup;
473 }
474
475 map_fd[0] = bpf_object__find_map_fd_by_name(obj, "array_of_lru_hashs");
476 map_fd[1] = bpf_object__find_map_fd_by_name(obj, "hash_map_alloc");
477 map_fd[2] = bpf_object__find_map_fd_by_name(obj, "lru_hash_lookup_map");
478 if (map_fd[0] < 0 || map_fd[1] < 0 || map_fd[2] < 0) {
479 fprintf(stderr, "ERROR: finding a map in obj file failed\n");
480 goto cleanup;
481 }
482
483 bpf_object__for_each_program(prog, obj) {
484 links[i] = bpf_program__attach(prog);
485 if (libbpf_get_error(links[i])) {
486 fprintf(stderr, "ERROR: bpf_program__attach failed\n");
487 links[i] = NULL;
488 goto cleanup;
489 }
490 i++;
491 }
492
493 fill_lpm_trie();
494
495 run_perf_test(nr_cpus);
496
497cleanup:
498 for (i--; i >= 0; i--)
499 bpf_link__destroy(links[i]);
500
501 bpf_object__close(obj);
502 return 0;
503}