// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2016 Facebook
*/
#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 <string.h>
#include <time.h>
#include <arpa/inet.h>
#include <errno.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.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,
LRU_HASH_LOOKUP,
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",
[LRU_HASH_LOOKUP] = "lru_hash_lookup_map",
};
enum map_idx {
array_of_lru_hashs_idx,
hash_map_alloc_idx,
lru_hash_lookup_idx,
NR_IDXES,
};
static int map_fd[NR_IDXES];
static int test_flags = ~0;
static uint32_t num_map_entries;
static uint32_t inner_lru_hash_size;
static int lru_hash_lookup_test_entries = 32;
static uint32_t max_cnt = 10000;
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 int pre_test_lru_hash_lookup(int tasks)
{
int fd = map_fd[lru_hash_lookup_idx];
uint32_t key;
long val = 1;
int ret;
if (num_map_entries > lru_hash_lookup_test_entries)
lru_hash_lookup_test_entries = num_map_entries;
/* Populate the lru_hash_map for LRU_HASH_LOOKUP perf test.
*
* It is fine that the user requests for a map with
* num_map_entries < 32 and some of the later lru hash lookup
* may return not found. For LRU map, we are not interested
* in such small map performance.
*/
for (key = 0; key < lru_hash_lookup_test_entries; key++) {
ret = bpf_map_update_elem(fd, &key, &val, BPF_NOEXIST);
if (ret)
return ret;
}
return 0;
}
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 && cpu) {
/* If CPU is not 0, create inner_lru hash map and insert the fd
* value into the array_of_lru_hash map. In case of CPU 0,
* 'inner_lru_hash_map' was statically inserted on the map init
*/
int outer_fd = map_fd[array_of_lru_hashs_idx];
unsigned int mycpu, mynode;
LIBBPF_OPTS(bpf_map_create_opts, opts,
.map_flags = BPF_F_NUMA_NODE,
);
assert(cpu < MAX_NR_CPUS);
ret = syscall(__NR_getcpu, &mycpu, &mynode, NULL);
assert(!ret);
opts.numa_node = mynode;
inner_lru_map_fds[cpu] =
bpf_map_create(BPF_MAP_TYPE_LRU_HASH,
test_map_names[INNER_LRU_HASH_PREALLOC],
sizeof(uint32_t),
sizeof(long),
inner_lru_hash_size, &opts);
if (inner_lru_map_fds[cpu] == -1) {
printf("cannot create BPF_MAP_TYPE_LRU_HASH %s(%d)\n",
strerror(errno), errno);
exit(1);
}
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[2] = 0;
} else if (test == NOCOMMON_LRU_HASH_PREALLOC) {
test_name = "nocommon_lru_hash_map_perf";
in6.sin6_addr.s6_addr16[2] = 1;
} else if (test == INNER_LRU_HASH_PREALLOC) {
test_name = "inner_lru_hash_map_perf";
in6.sin6_addr.s6_addr16[2] = 2;
} else if (test == LRU_HASH_LOOKUP) {
test_name = "lru_hash_lookup_perf";
in6.sin6_addr.s6_addr16[2] = 3;
in6.sin6_addr.s6_addr32[3] = 0;
} 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);
if (in6.sin6_addr.s6_addr32[3] <
lru_hash_lookup_test_entries - 32)
in6.sin6_addr.s6_addr32[3] += 32;
else
in6.sin6_addr.s6_addr32[3] = 0;
}
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_lru_hash_lookup(int cpu)
{
do_test_lru(LRU_HASH_LOOKUP, 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_getppid, 0);
printf("%d:array_lookup %lld lookups per sec\n",
cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
}
typedef int (*pre_test_func)(int tasks);
const pre_test_func pre_test_funcs[] = {
[LRU_HASH_LOOKUP] = pre_test_lru_hash_lookup,
};
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,
[LRU_HASH_LOOKUP] = test_lru_hash_lookup,
};
static int pre_test(int tasks)
{
int i;
for (i = 0; i < NR_TESTS; i++) {
if (pre_test_funcs[i] && check_test_flags(i)) {
int ret = pre_test_funcs[i](tasks);
if (ret)
return ret;
}
}
return 0;
}
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;
assert(!pre_test(tasks));
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_u8 *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[hash_map_alloc_idx],
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[hash_map_alloc_idx], key, &value, 0);
assert(!r);
}
static void fixup_map(struct bpf_object *obj)
{
struct bpf_map *map;
int i;
bpf_object__for_each_map(map, obj) {
const char *name = bpf_map__name(map);
/* Only change the max_entries for the enabled test(s) */
for (i = 0; i < NR_TESTS; i++) {
if (!strcmp(test_map_names[i], name) &&
(check_test_flags(i))) {
bpf_map__set_max_entries(map, num_map_entries);
continue;
}
}
}
inner_lru_hash_size = num_map_entries;
}
int main(int argc, char **argv)
{
int nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
struct bpf_link *links[8];
struct bpf_program *prog;
struct bpf_object *obj;
struct bpf_map *map;
char filename[256];
int i = 0;
if (argc > 1)
test_flags = atoi(argv[1]) ? : test_flags;
if (argc > 2)
nr_cpus = atoi(argv[2]) ? : nr_cpus;
if (argc > 3)
num_map_entries = atoi(argv[3]);
if (argc > 4)
max_cnt = atoi(argv[4]);
snprintf(filename, sizeof(filename), "%s.bpf.o", argv[0]);
obj = bpf_object__open_file(filename, NULL);
if (libbpf_get_error(obj)) {
fprintf(stderr, "ERROR: opening BPF object file failed\n");
return 0;
}
map = bpf_object__find_map_by_name(obj, "inner_lru_hash_map");
if (libbpf_get_error(map)) {
fprintf(stderr, "ERROR: finding a map in obj file failed\n");
goto cleanup;
}
inner_lru_hash_size = bpf_map__max_entries(map);
if (!inner_lru_hash_size) {
fprintf(stderr, "ERROR: failed to get map attribute\n");
goto cleanup;
}
/* resize BPF map prior to loading */
if (num_map_entries > 0)
fixup_map(obj);
/* load BPF program */
if (bpf_object__load(obj)) {
fprintf(stderr, "ERROR: loading BPF object file failed\n");
goto cleanup;
}
map_fd[0] = bpf_object__find_map_fd_by_name(obj, "array_of_lru_hashs");
map_fd[1] = bpf_object__find_map_fd_by_name(obj, "hash_map_alloc");
map_fd[2] = bpf_object__find_map_fd_by_name(obj, "lru_hash_lookup_map");
if (map_fd[0] < 0 || map_fd[1] < 0 || map_fd[2] < 0) {
fprintf(stderr, "ERROR: finding a map in obj file failed\n");
goto cleanup;
}
bpf_object__for_each_program(prog, obj) {
links[i] = bpf_program__attach(prog);
if (libbpf_get_error(links[i])) {
fprintf(stderr, "ERROR: bpf_program__attach failed\n");
links[i] = NULL;
goto cleanup;
}
i++;
}
fill_lpm_trie();
run_perf_test(nr_cpus);
cleanup:
for (i--; i >= 0; i--)
bpf_link__destroy(links[i]);
bpf_object__close(obj);
return 0;
}
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