mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
6979bcc731
Do this change before others start to use this callback.
Change map_perf_test_user.c which seems to be the only user.
This patch extends capabilities of commit 9fd63d05f3
("bpf:
Allow bpf sample programs (*_user.c) to change bpf_map_def").
Give fixup callback access to struct bpf_map_data, instead of
only stuct bpf_map_def. This add flexibility to allow userspace
to reassign the map file descriptor. This is very useful when
wanting to share maps between several bpf programs.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
386 lines
8.7 KiB
C
386 lines
8.7 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 "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;
|
|
}
|