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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 107 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
461 lines
10 KiB
C
461 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2016 Facebook
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*/
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#define _GNU_SOURCE
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#include <sched.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <asm/unistd.h>
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#include <unistd.h>
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#include <assert.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <linux/bpf.h>
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#include <string.h>
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#include <time.h>
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#include <sys/resource.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <bpf/bpf.h>
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#include "bpf_load.h"
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#define TEST_BIT(t) (1U << (t))
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#define MAX_NR_CPUS 1024
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static __u64 time_get_ns(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * 1000000000ull + ts.tv_nsec;
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}
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enum test_type {
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HASH_PREALLOC,
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PERCPU_HASH_PREALLOC,
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HASH_KMALLOC,
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PERCPU_HASH_KMALLOC,
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LRU_HASH_PREALLOC,
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NOCOMMON_LRU_HASH_PREALLOC,
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LPM_KMALLOC,
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HASH_LOOKUP,
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ARRAY_LOOKUP,
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INNER_LRU_HASH_PREALLOC,
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LRU_HASH_LOOKUP,
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NR_TESTS,
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};
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const char *test_map_names[NR_TESTS] = {
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[HASH_PREALLOC] = "hash_map",
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[PERCPU_HASH_PREALLOC] = "percpu_hash_map",
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[HASH_KMALLOC] = "hash_map_alloc",
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[PERCPU_HASH_KMALLOC] = "percpu_hash_map_alloc",
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[LRU_HASH_PREALLOC] = "lru_hash_map",
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[NOCOMMON_LRU_HASH_PREALLOC] = "nocommon_lru_hash_map",
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[LPM_KMALLOC] = "lpm_trie_map_alloc",
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[HASH_LOOKUP] = "hash_map",
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[ARRAY_LOOKUP] = "array_map",
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[INNER_LRU_HASH_PREALLOC] = "inner_lru_hash_map",
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[LRU_HASH_LOOKUP] = "lru_hash_lookup_map",
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};
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static int test_flags = ~0;
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static uint32_t num_map_entries;
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static uint32_t inner_lru_hash_size;
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static int inner_lru_hash_idx = -1;
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static int array_of_lru_hashs_idx = -1;
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static int lru_hash_lookup_idx = -1;
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static int lru_hash_lookup_test_entries = 32;
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static uint32_t max_cnt = 1000000;
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static int check_test_flags(enum test_type t)
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{
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return test_flags & TEST_BIT(t);
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}
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static void test_hash_prealloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_getuid);
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printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
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cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
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}
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static int pre_test_lru_hash_lookup(int tasks)
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{
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int fd = map_fd[lru_hash_lookup_idx];
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uint32_t key;
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long val = 1;
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int ret;
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if (num_map_entries > lru_hash_lookup_test_entries)
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lru_hash_lookup_test_entries = num_map_entries;
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/* Populate the lru_hash_map for LRU_HASH_LOOKUP perf test.
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*
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* It is fine that the user requests for a map with
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* num_map_entries < 32 and some of the later lru hash lookup
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* may return not found. For LRU map, we are not interested
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* in such small map performance.
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*/
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for (key = 0; key < lru_hash_lookup_test_entries; key++) {
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ret = bpf_map_update_elem(fd, &key, &val, BPF_NOEXIST);
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if (ret)
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return ret;
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}
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return 0;
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}
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static void do_test_lru(enum test_type test, int cpu)
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{
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static int inner_lru_map_fds[MAX_NR_CPUS];
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struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 };
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const char *test_name;
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__u64 start_time;
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int i, ret;
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if (test == INNER_LRU_HASH_PREALLOC) {
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int outer_fd = map_fd[array_of_lru_hashs_idx];
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unsigned int mycpu, mynode;
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assert(cpu < MAX_NR_CPUS);
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if (cpu) {
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ret = syscall(__NR_getcpu, &mycpu, &mynode, NULL);
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assert(!ret);
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inner_lru_map_fds[cpu] =
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bpf_create_map_node(BPF_MAP_TYPE_LRU_HASH,
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test_map_names[INNER_LRU_HASH_PREALLOC],
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sizeof(uint32_t),
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sizeof(long),
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inner_lru_hash_size, 0,
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mynode);
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if (inner_lru_map_fds[cpu] == -1) {
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printf("cannot create BPF_MAP_TYPE_LRU_HASH %s(%d)\n",
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strerror(errno), errno);
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exit(1);
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}
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} else {
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inner_lru_map_fds[cpu] = map_fd[inner_lru_hash_idx];
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}
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ret = bpf_map_update_elem(outer_fd, &cpu,
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&inner_lru_map_fds[cpu],
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BPF_ANY);
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if (ret) {
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printf("cannot update ARRAY_OF_LRU_HASHS with key:%u. %s(%d)\n",
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cpu, strerror(errno), errno);
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exit(1);
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}
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}
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in6.sin6_addr.s6_addr16[0] = 0xdead;
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in6.sin6_addr.s6_addr16[1] = 0xbeef;
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if (test == LRU_HASH_PREALLOC) {
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test_name = "lru_hash_map_perf";
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in6.sin6_addr.s6_addr16[2] = 0;
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} else if (test == NOCOMMON_LRU_HASH_PREALLOC) {
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test_name = "nocommon_lru_hash_map_perf";
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in6.sin6_addr.s6_addr16[2] = 1;
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} else if (test == INNER_LRU_HASH_PREALLOC) {
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test_name = "inner_lru_hash_map_perf";
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in6.sin6_addr.s6_addr16[2] = 2;
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} else if (test == LRU_HASH_LOOKUP) {
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test_name = "lru_hash_lookup_perf";
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in6.sin6_addr.s6_addr16[2] = 3;
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in6.sin6_addr.s6_addr32[3] = 0;
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} else {
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assert(0);
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}
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++) {
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ret = connect(-1, (const struct sockaddr *)&in6, sizeof(in6));
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assert(ret == -1 && errno == EBADF);
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if (in6.sin6_addr.s6_addr32[3] <
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lru_hash_lookup_test_entries - 32)
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in6.sin6_addr.s6_addr32[3] += 32;
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else
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in6.sin6_addr.s6_addr32[3] = 0;
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}
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printf("%d:%s pre-alloc %lld events per sec\n",
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cpu, test_name,
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max_cnt * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_lru_hash_prealloc(int cpu)
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{
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do_test_lru(LRU_HASH_PREALLOC, cpu);
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}
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static void test_nocommon_lru_hash_prealloc(int cpu)
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{
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do_test_lru(NOCOMMON_LRU_HASH_PREALLOC, cpu);
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}
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static void test_inner_lru_hash_prealloc(int cpu)
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{
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do_test_lru(INNER_LRU_HASH_PREALLOC, cpu);
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}
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static void test_lru_hash_lookup(int cpu)
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{
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do_test_lru(LRU_HASH_LOOKUP, cpu);
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}
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static void test_percpu_hash_prealloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_geteuid);
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printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
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cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_hash_kmalloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_getgid);
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printf("%d:hash_map_perf kmalloc %lld events per sec\n",
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cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_percpu_hash_kmalloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_getegid);
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printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
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cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_lpm_kmalloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_gettid);
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printf("%d:lpm_perf kmalloc %lld events per sec\n",
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cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_hash_lookup(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_getpgid, 0);
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printf("%d:hash_lookup %lld lookups per sec\n",
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cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
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}
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static void test_array_lookup(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < max_cnt; i++)
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syscall(__NR_getppid, 0);
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printf("%d:array_lookup %lld lookups per sec\n",
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cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
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}
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typedef int (*pre_test_func)(int tasks);
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const pre_test_func pre_test_funcs[] = {
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[LRU_HASH_LOOKUP] = pre_test_lru_hash_lookup,
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};
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typedef void (*test_func)(int cpu);
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const test_func test_funcs[] = {
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[HASH_PREALLOC] = test_hash_prealloc,
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[PERCPU_HASH_PREALLOC] = test_percpu_hash_prealloc,
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[HASH_KMALLOC] = test_hash_kmalloc,
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[PERCPU_HASH_KMALLOC] = test_percpu_hash_kmalloc,
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[LRU_HASH_PREALLOC] = test_lru_hash_prealloc,
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[NOCOMMON_LRU_HASH_PREALLOC] = test_nocommon_lru_hash_prealloc,
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[LPM_KMALLOC] = test_lpm_kmalloc,
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[HASH_LOOKUP] = test_hash_lookup,
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[ARRAY_LOOKUP] = test_array_lookup,
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[INNER_LRU_HASH_PREALLOC] = test_inner_lru_hash_prealloc,
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[LRU_HASH_LOOKUP] = test_lru_hash_lookup,
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};
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static int pre_test(int tasks)
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{
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int i;
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for (i = 0; i < NR_TESTS; i++) {
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if (pre_test_funcs[i] && check_test_flags(i)) {
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int ret = pre_test_funcs[i](tasks);
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if (ret)
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return ret;
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}
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}
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return 0;
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}
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static void loop(int cpu)
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{
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cpu_set_t cpuset;
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int i;
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CPU_ZERO(&cpuset);
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CPU_SET(cpu, &cpuset);
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sched_setaffinity(0, sizeof(cpuset), &cpuset);
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for (i = 0; i < NR_TESTS; i++) {
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if (check_test_flags(i))
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test_funcs[i](cpu);
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}
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}
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static void run_perf_test(int tasks)
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{
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pid_t pid[tasks];
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int i;
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assert(!pre_test(tasks));
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for (i = 0; i < tasks; i++) {
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pid[i] = fork();
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if (pid[i] == 0) {
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loop(i);
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exit(0);
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} else if (pid[i] == -1) {
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printf("couldn't spawn #%d process\n", i);
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exit(1);
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}
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}
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for (i = 0; i < tasks; i++) {
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int status;
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assert(waitpid(pid[i], &status, 0) == pid[i]);
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assert(status == 0);
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}
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}
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static void fill_lpm_trie(void)
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{
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struct bpf_lpm_trie_key *key;
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unsigned long value = 0;
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unsigned int i;
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int r;
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key = alloca(sizeof(*key) + 4);
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key->prefixlen = 32;
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for (i = 0; i < 512; ++i) {
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key->prefixlen = rand() % 33;
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key->data[0] = rand() & 0xff;
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key->data[1] = rand() & 0xff;
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key->data[2] = rand() & 0xff;
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key->data[3] = rand() & 0xff;
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r = bpf_map_update_elem(map_fd[6], key, &value, 0);
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assert(!r);
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}
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key->prefixlen = 32;
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key->data[0] = 192;
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key->data[1] = 168;
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key->data[2] = 0;
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key->data[3] = 1;
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value = 128;
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r = bpf_map_update_elem(map_fd[6], key, &value, 0);
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assert(!r);
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}
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static void fixup_map(struct bpf_map_data *map, int idx)
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{
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int i;
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if (!strcmp("inner_lru_hash_map", map->name)) {
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inner_lru_hash_idx = idx;
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inner_lru_hash_size = map->def.max_entries;
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}
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if (!strcmp("array_of_lru_hashs", map->name)) {
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if (inner_lru_hash_idx == -1) {
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printf("inner_lru_hash_map must be defined before array_of_lru_hashs\n");
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exit(1);
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}
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map->def.inner_map_idx = inner_lru_hash_idx;
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array_of_lru_hashs_idx = idx;
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}
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if (!strcmp("lru_hash_lookup_map", map->name))
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lru_hash_lookup_idx = idx;
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if (num_map_entries <= 0)
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return;
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inner_lru_hash_size = num_map_entries;
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/* Only change the max_entries for the enabled test(s) */
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for (i = 0; i < NR_TESTS; i++) {
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if (!strcmp(test_map_names[i], map->name) &&
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(check_test_flags(i))) {
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map->def.max_entries = num_map_entries;
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}
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}
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}
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int main(int argc, char **argv)
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{
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struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
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char filename[256];
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int num_cpu = 8;
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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setrlimit(RLIMIT_MEMLOCK, &r);
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if (argc > 1)
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test_flags = atoi(argv[1]) ? : test_flags;
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if (argc > 2)
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num_cpu = atoi(argv[2]) ? : num_cpu;
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if (argc > 3)
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num_map_entries = atoi(argv[3]);
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if (argc > 4)
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max_cnt = atoi(argv[4]);
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if (load_bpf_file_fixup_map(filename, fixup_map)) {
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printf("%s", bpf_log_buf);
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return 1;
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}
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fill_lpm_trie();
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run_perf_test(num_cpu);
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return 0;
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}
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