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linux/samples/bpf/map_perf_test_user.c
Jakub Kicinski 2bf3e2ef42 samples: bpf: include bpf/bpf.h instead of local libbpf.h
There are two files in the tree called libbpf.h which is becoming
problematic.  Most samples don't actually need the local libbpf.h
they simply include it to get to bpf/bpf.h.  Include bpf/bpf.h
directly instead.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-14 22:52:10 -07:00

465 lines
11 KiB
C

/* 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 <bpf/bpf.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,
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",
};
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 int lru_hash_lookup_idx = -1;
static int lru_hash_lookup_test_entries = 32;
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 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) {
int outer_fd = map_fd[array_of_lru_hashs_idx];
unsigned int mycpu, mynode;
assert(cpu < MAX_NR_CPUS);
if (cpu) {
ret = syscall(__NR_getcpu, &mycpu, &mynode, NULL);
assert(!ret);
inner_lru_map_fds[cpu] =
bpf_create_map_node(BPF_MAP_TYPE_LRU_HASH,
test_map_names[INNER_LRU_HASH_PREALLOC],
sizeof(uint32_t),
sizeof(long),
inner_lru_hash_size, 0,
mynode);
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[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 *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 (!strcmp("lru_hash_lookup_map", map->name))
lru_hash_lookup_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;
}