bpf: Add tests for the LRU bpf_htab
This patch has some unit tests and a test_lru_dist. The test_lru_dist reads in the numeric keys from a file. The files used here are generated by a modified fio-genzipf tool originated from the fio test suit. The sample data file can be found here: https://github.com/iamkafai/bpf-lru The zipf.* data files have 100k numeric keys and the key is also ranged from 1 to 100k. The test_lru_dist outputs the number of unique keys (nr_unique). F.e. The following means, 61239 of them is unique out of 100k keys. nr_misses means it cannot be found in the LRU map, so nr_misses must be >= nr_unique. test_lru_dist also simulates a perfect LRU map as a comparison: [root@arch-fb-vm1 ~]# ~/devshare/fb-kernel/linux/samples/bpf/test_lru_dist \ /root/zipf.100k.a1_01.out 4000 1 ... test_parallel_lru_dist (map_type:9 map_flags:0x0): task:0 BPF LRU: nr_unique:23093(/100000) nr_misses:31603(/100000) task:0 Perfect LRU: nr_unique:23093(/100000 nr_misses:34328(/100000) .... test_parallel_lru_dist (map_type:9 map_flags:0x2): task:0 BPF LRU: nr_unique:23093(/100000) nr_misses:31710(/100000) task:0 Perfect LRU: nr_unique:23093(/100000 nr_misses:34328(/100000) [root@arch-fb-vm1 ~]# ~/devshare/fb-kernel/linux/samples/bpf/test_lru_dist \ /root/zipf.100k.a0_01.out 40000 1 ... test_parallel_lru_dist (map_type:9 map_flags:0x0): task:0 BPF LRU: nr_unique:61239(/100000) nr_misses:67054(/100000) task:0 Perfect LRU: nr_unique:61239(/100000 nr_misses:66993(/100000) ... test_parallel_lru_dist (map_type:9 map_flags:0x2): task:0 BPF LRU: nr_unique:61239(/100000) nr_misses:67068(/100000) task:0 Perfect LRU: nr_unique:61239(/100000 nr_misses:66993(/100000) LRU map has also been added to map_perf_test: /* Global LRU */ [root@kerneltest003.31.prn1 ~]# for i in 1 4 8; do echo -n "$i cpus: "; \ ./map_perf_test 16 $i | awk '{r += $3}END{print r " updates"}'; done 1 cpus: 2934082 updates 4 cpus: 7391434 updates 8 cpus: 6500576 updates /* Percpu LRU */ [root@kerneltest003.31.prn1 ~]# for i in 1 4 8; do echo -n "$i cpus: "; \ ./map_perf_test 32 $i | awk '{r += $3}END{print r " updates"}'; done 1 cpus: 2896553 updates 4 cpus: 9766395 updates 8 cpus: 17460553 updates Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau
David S. Miller
parent
8f8449384e
commit
5db58faf98
@ -2,6 +2,7 @@
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obj- := dummy.o
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# List of programs to build
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hostprogs-y := test_lru_dist
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hostprogs-y += sock_example
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hostprogs-y += fds_example
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hostprogs-y += sockex1
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@ -28,6 +29,7 @@ hostprogs-y += trace_event
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hostprogs-y += sampleip
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hostprogs-y += tc_l2_redirect
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test_lru_dist-objs := test_lru_dist.o libbpf.o
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sock_example-objs := sock_example.o libbpf.o
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fds_example-objs := bpf_load.o libbpf.o fds_example.o
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sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
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@ -19,6 +19,21 @@ struct bpf_map_def SEC("maps") hash_map = {
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.max_entries = MAX_ENTRIES,
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};
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struct bpf_map_def SEC("maps") lru_hash_map = {
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.type = BPF_MAP_TYPE_LRU_HASH,
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.key_size = sizeof(u32),
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.value_size = sizeof(long),
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.max_entries = 10000,
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};
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struct bpf_map_def SEC("maps") percpu_lru_hash_map = {
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.type = BPF_MAP_TYPE_LRU_HASH,
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.key_size = sizeof(u32),
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.value_size = sizeof(long),
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.max_entries = 10000,
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.map_flags = BPF_F_NO_COMMON_LRU,
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};
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struct bpf_map_def SEC("maps") percpu_hash_map = {
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.type = BPF_MAP_TYPE_PERCPU_HASH,
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.key_size = sizeof(u32),
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@ -53,6 +68,7 @@ int stress_hmap(struct pt_regs *ctx)
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value = bpf_map_lookup_elem(&hash_map, &key);
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if (value)
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bpf_map_delete_elem(&hash_map, &key);
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return 0;
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}
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@ -96,5 +112,28 @@ int stress_percpu_hmap_alloc(struct pt_regs *ctx)
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bpf_map_delete_elem(&percpu_hash_map_alloc, &key);
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return 0;
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}
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SEC("kprobe/sys_getpid")
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int stress_lru_hmap_alloc(struct pt_regs *ctx)
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{
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u32 key = bpf_get_prandom_u32();
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long val = 1;
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bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
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return 0;
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}
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SEC("kprobe/sys_getppid")
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int stress_percpu_lru_hmap_alloc(struct pt_regs *ctx)
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{
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u32 key = bpf_get_prandom_u32();
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long val = 1;
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bpf_map_update_elem(&percpu_lru_hash_map, &key, &val, BPF_ANY);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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u32 _version SEC("version") = LINUX_VERSION_CODE;
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@ -35,6 +35,8 @@ static __u64 time_get_ns(void)
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#define PERCPU_HASH_PREALLOC (1 << 1)
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#define HASH_KMALLOC (1 << 2)
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#define PERCPU_HASH_KMALLOC (1 << 3)
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#define LRU_HASH_PREALLOC (1 << 4)
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#define PERCPU_LRU_HASH_PREALLOC (1 << 5)
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static int test_flags = ~0;
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@ -50,6 +52,30 @@ static void test_hash_prealloc(int cpu)
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cpu, 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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__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_getpid);
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printf("%d:lru_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_percpu_lru_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_getppid);
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printf("%d:lru_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_percpu_hash_prealloc(int cpu)
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{
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__u64 start_time;
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@ -105,6 +131,12 @@ static void loop(int cpu)
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if (test_flags & PERCPU_HASH_KMALLOC)
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test_percpu_hash_kmalloc(cpu);
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if (test_flags & LRU_HASH_PREALLOC)
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test_lru_hash_prealloc(cpu);
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if (test_flags & PERCPU_LRU_HASH_PREALLOC)
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test_percpu_lru_hash_prealloc(cpu);
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}
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static void run_perf_test(int tasks)
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538
samples/bpf/test_lru_dist.c
Normal file
538
samples/bpf/test_lru_dist.c
Normal file
@ -0,0 +1,538 @@
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/*
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* Copyright (c) 2016 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#define _GNU_SOURCE
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#include <linux/types.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <linux/bpf.h>
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#include <errno.h>
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#include <string.h>
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#include <assert.h>
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#include <sched.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <time.h>
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#include "libbpf.h"
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#define min(a, b) ((a) < (b) ? (a) : (b))
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#define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER)
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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static int nr_cpus;
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static unsigned long long *dist_keys;
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static unsigned int dist_key_counts;
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struct list_head {
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struct list_head *next, *prev;
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};
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static inline void INIT_LIST_HEAD(struct list_head *list)
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{
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list->next = list;
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list->prev = list;
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}
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static inline int list_empty(const struct list_head *head)
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{
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return head->next == head;
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}
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static inline void __list_add(struct list_head *new,
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struct list_head *prev,
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struct list_head *next)
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{
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next->prev = new;
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new->next = next;
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new->prev = prev;
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prev->next = new;
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}
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static inline void list_add(struct list_head *new, struct list_head *head)
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{
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__list_add(new, head, head->next);
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}
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static inline void __list_del(struct list_head *prev, struct list_head *next)
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{
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next->prev = prev;
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prev->next = next;
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}
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static inline void __list_del_entry(struct list_head *entry)
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{
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__list_del(entry->prev, entry->next);
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}
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static inline void list_move(struct list_head *list, struct list_head *head)
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{
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__list_del_entry(list);
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list_add(list, head);
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}
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#define list_entry(ptr, type, member) \
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container_of(ptr, type, member)
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#define list_last_entry(ptr, type, member) \
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list_entry((ptr)->prev, type, member)
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struct pfect_lru_node {
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struct list_head list;
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unsigned long long key;
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};
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struct pfect_lru {
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struct list_head list;
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struct pfect_lru_node *free_nodes;
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unsigned int cur_size;
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unsigned int lru_size;
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unsigned int nr_unique;
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unsigned int nr_misses;
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unsigned int total;
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int map_fd;
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};
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static void pfect_lru_init(struct pfect_lru *lru, unsigned int lru_size,
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unsigned int nr_possible_elems)
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{
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lru->map_fd = bpf_create_map(BPF_MAP_TYPE_HASH,
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sizeof(unsigned long long),
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sizeof(struct pfect_lru_node *),
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nr_possible_elems, 0);
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assert(lru->map_fd != -1);
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lru->free_nodes = malloc(lru_size * sizeof(struct pfect_lru_node));
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assert(lru->free_nodes);
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INIT_LIST_HEAD(&lru->list);
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lru->cur_size = 0;
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lru->lru_size = lru_size;
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lru->nr_unique = lru->nr_misses = lru->total = 0;
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}
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static void pfect_lru_destroy(struct pfect_lru *lru)
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{
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close(lru->map_fd);
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free(lru->free_nodes);
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}
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static int pfect_lru_lookup_or_insert(struct pfect_lru *lru,
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unsigned long long key)
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{
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struct pfect_lru_node *node = NULL;
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int seen = 0;
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lru->total++;
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if (!bpf_lookup_elem(lru->map_fd, &key, &node)) {
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if (node) {
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list_move(&node->list, &lru->list);
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return 1;
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}
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seen = 1;
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}
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if (lru->cur_size < lru->lru_size) {
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node = &lru->free_nodes[lru->cur_size++];
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INIT_LIST_HEAD(&node->list);
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} else {
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struct pfect_lru_node *null_node = NULL;
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node = list_last_entry(&lru->list,
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struct pfect_lru_node,
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list);
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bpf_update_elem(lru->map_fd, &node->key, &null_node, BPF_EXIST);
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}
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node->key = key;
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list_move(&node->list, &lru->list);
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lru->nr_misses++;
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if (seen) {
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assert(!bpf_update_elem(lru->map_fd, &key, &node, BPF_EXIST));
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} else {
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lru->nr_unique++;
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assert(!bpf_update_elem(lru->map_fd, &key, &node, BPF_NOEXIST));
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}
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return seen;
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}
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static unsigned int read_keys(const char *dist_file,
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unsigned long long **keys)
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{
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struct stat fst;
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unsigned long long *retkeys;
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unsigned int counts = 0;
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int dist_fd;
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char *b, *l;
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int i;
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dist_fd = open(dist_file, 0);
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assert(dist_fd != -1);
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assert(fstat(dist_fd, &fst) == 0);
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b = malloc(fst.st_size);
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assert(b);
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assert(read(dist_fd, b, fst.st_size) == fst.st_size);
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close(dist_fd);
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for (i = 0; i < fst.st_size; i++) {
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if (b[i] == '\n')
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counts++;
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}
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counts++; /* in case the last line has no \n */
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retkeys = malloc(counts * sizeof(unsigned long long));
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assert(retkeys);
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counts = 0;
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for (l = strtok(b, "\n"); l; l = strtok(NULL, "\n"))
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retkeys[counts++] = strtoull(l, NULL, 10);
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free(b);
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*keys = retkeys;
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return counts;
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}
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static int create_map(int map_type, int map_flags, unsigned int size)
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{
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int map_fd;
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map_fd = bpf_create_map(map_type, sizeof(unsigned long long),
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sizeof(unsigned long long), size, map_flags);
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if (map_fd == -1)
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perror("bpf_create_map");
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return map_fd;
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}
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static int sched_next_online(int pid, int next_to_try)
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{
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cpu_set_t cpuset;
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if (next_to_try == nr_cpus)
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return -1;
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while (next_to_try < nr_cpus) {
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CPU_ZERO(&cpuset);
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CPU_SET(next_to_try++, &cpuset);
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if (!sched_setaffinity(pid, sizeof(cpuset), &cpuset))
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break;
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}
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return next_to_try;
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}
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static void run_parallel(unsigned int tasks, void (*fn)(int i, void *data),
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void *data)
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{
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int next_sched_cpu = 0;
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pid_t pid[tasks];
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int i;
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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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next_sched_cpu = sched_next_online(0, next_sched_cpu);
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fn(i, data);
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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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/* It is mostly redundant and just allow the parent
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* process to update next_shced_cpu for the next child
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* process
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*/
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next_sched_cpu = sched_next_online(pid[i], next_sched_cpu);
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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 do_test_lru_dist(int task, void *data)
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{
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unsigned int nr_misses = 0;
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struct pfect_lru pfect_lru;
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unsigned long long key, value = 1234;
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unsigned int i;
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unsigned int lru_map_fd = ((unsigned int *)data)[0];
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unsigned int lru_size = ((unsigned int *)data)[1];
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unsigned long long key_offset = task * dist_key_counts;
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pfect_lru_init(&pfect_lru, lru_size, dist_key_counts);
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for (i = 0; i < dist_key_counts; i++) {
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key = dist_keys[i] + key_offset;
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pfect_lru_lookup_or_insert(&pfect_lru, key);
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if (!bpf_lookup_elem(lru_map_fd, &key, &value))
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continue;
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if (bpf_update_elem(lru_map_fd, &key, &value, BPF_NOEXIST)) {
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printf("bpf_update_elem(lru_map_fd, %llu): errno:%d\n",
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key, errno);
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assert(0);
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}
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nr_misses++;
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}
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printf(" task:%d BPF LRU: nr_unique:%u(/%u) nr_misses:%u(/%u)\n",
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task, pfect_lru.nr_unique, dist_key_counts, nr_misses,
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||||
dist_key_counts);
|
||||
printf(" task:%d Perfect LRU: nr_unique:%u(/%u) nr_misses:%u(/%u)\n",
|
||||
task, pfect_lru.nr_unique, pfect_lru.total,
|
||||
pfect_lru.nr_misses, pfect_lru.total);
|
||||
|
||||
pfect_lru_destroy(&pfect_lru);
|
||||
close(lru_map_fd);
|
||||
}
|
||||
|
||||
static void test_parallel_lru_dist(int map_type, int map_flags,
|
||||
int nr_tasks, unsigned int lru_size)
|
||||
{
|
||||
int child_data[2];
|
||||
int lru_map_fd;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X):\n", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
lru_map_fd = create_map(map_type, map_flags,
|
||||
nr_cpus * lru_size);
|
||||
else
|
||||
lru_map_fd = create_map(map_type, map_flags,
|
||||
nr_tasks * lru_size);
|
||||
assert(lru_map_fd != -1);
|
||||
|
||||
child_data[0] = lru_map_fd;
|
||||
child_data[1] = lru_size;
|
||||
|
||||
run_parallel(nr_tasks, do_test_lru_dist, child_data);
|
||||
|
||||
close(lru_map_fd);
|
||||
}
|
||||
|
||||
static void test_lru_loss0(int map_type, int map_flags)
|
||||
{
|
||||
unsigned long long key, value[nr_cpus];
|
||||
unsigned int old_unused_losses = 0;
|
||||
unsigned int new_unused_losses = 0;
|
||||
unsigned int used_losses = 0;
|
||||
int map_fd;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
map_fd = create_map(map_type, map_flags, 900 * nr_cpus);
|
||||
else
|
||||
map_fd = create_map(map_type, map_flags, 900);
|
||||
|
||||
assert(map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
for (key = 1; key <= 1000; key++) {
|
||||
int start_key, end_key;
|
||||
|
||||
assert(bpf_update_elem(map_fd, &key, value, BPF_NOEXIST) == 0);
|
||||
|
||||
start_key = 101;
|
||||
end_key = min(key, 900);
|
||||
|
||||
while (start_key <= end_key) {
|
||||
bpf_lookup_elem(map_fd, &start_key, value);
|
||||
start_key++;
|
||||
}
|
||||
}
|
||||
|
||||
for (key = 1; key <= 1000; key++) {
|
||||
if (bpf_lookup_elem(map_fd, &key, value)) {
|
||||
if (key <= 100)
|
||||
old_unused_losses++;
|
||||
else if (key <= 900)
|
||||
used_losses++;
|
||||
else
|
||||
new_unused_losses++;
|
||||
}
|
||||
}
|
||||
|
||||
close(map_fd);
|
||||
|
||||
printf("older-elem-losses:%d(/100) active-elem-losses:%d(/800) "
|
||||
"newer-elem-losses:%d(/100)\n",
|
||||
old_unused_losses, used_losses, new_unused_losses);
|
||||
}
|
||||
|
||||
static void test_lru_loss1(int map_type, int map_flags)
|
||||
{
|
||||
unsigned long long key, value[nr_cpus];
|
||||
int map_fd;
|
||||
unsigned int nr_losses = 0;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
map_fd = create_map(map_type, map_flags, 1000 * nr_cpus);
|
||||
else
|
||||
map_fd = create_map(map_type, map_flags, 1000);
|
||||
|
||||
assert(map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
for (key = 1; key <= 1000; key++)
|
||||
assert(!bpf_update_elem(map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
for (key = 1; key <= 1000; key++) {
|
||||
if (bpf_lookup_elem(map_fd, &key, value))
|
||||
nr_losses++;
|
||||
}
|
||||
|
||||
close(map_fd);
|
||||
|
||||
printf("nr_losses:%d(/1000)\n", nr_losses);
|
||||
}
|
||||
|
||||
static void do_test_parallel_lru_loss(int task, void *data)
|
||||
{
|
||||
const unsigned int nr_stable_elems = 1000;
|
||||
const unsigned int nr_repeats = 100000;
|
||||
|
||||
int map_fd = *(int *)data;
|
||||
unsigned long long stable_base;
|
||||
unsigned long long key, value[nr_cpus];
|
||||
unsigned long long next_ins_key;
|
||||
unsigned int nr_losses = 0;
|
||||
unsigned int i;
|
||||
|
||||
stable_base = task * nr_repeats * 2 + 1;
|
||||
next_ins_key = stable_base;
|
||||
value[0] = 1234;
|
||||
for (i = 0; i < nr_stable_elems; i++) {
|
||||
assert(bpf_update_elem(map_fd, &next_ins_key, value,
|
||||
BPF_NOEXIST) == 0);
|
||||
next_ins_key++;
|
||||
}
|
||||
|
||||
for (i = 0; i < nr_repeats; i++) {
|
||||
int rn;
|
||||
|
||||
rn = rand();
|
||||
|
||||
if (rn % 10) {
|
||||
key = rn % nr_stable_elems + stable_base;
|
||||
bpf_lookup_elem(map_fd, &key, value);
|
||||
} else {
|
||||
bpf_update_elem(map_fd, &next_ins_key, value,
|
||||
BPF_NOEXIST);
|
||||
next_ins_key++;
|
||||
}
|
||||
}
|
||||
|
||||
key = stable_base;
|
||||
for (i = 0; i < nr_stable_elems; i++) {
|
||||
if (bpf_lookup_elem(map_fd, &key, value))
|
||||
nr_losses++;
|
||||
key++;
|
||||
}
|
||||
|
||||
printf(" task:%d nr_losses:%u\n", task, nr_losses);
|
||||
}
|
||||
|
||||
static void test_parallel_lru_loss(int map_type, int map_flags, int nr_tasks)
|
||||
{
|
||||
int map_fd;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X):\n", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
/* Give 20% more than the active working set */
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
map_fd = create_map(map_type, map_flags,
|
||||
nr_cpus * (1000 + 200));
|
||||
else
|
||||
map_fd = create_map(map_type, map_flags,
|
||||
nr_tasks * (1000 + 200));
|
||||
|
||||
assert(map_fd != -1);
|
||||
|
||||
run_parallel(nr_tasks, do_test_parallel_lru_loss, &map_fd);
|
||||
|
||||
close(map_fd);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
||||
int map_flags[] = {0, BPF_F_NO_COMMON_LRU};
|
||||
const char *dist_file;
|
||||
int nr_tasks = 1;
|
||||
int lru_size;
|
||||
int f;
|
||||
|
||||
if (argc < 4) {
|
||||
printf("Usage: %s <dist-file> <lru-size> <nr-tasks>\n",
|
||||
argv[0]);
|
||||
return -1;
|
||||
}
|
||||
|
||||
dist_file = argv[1];
|
||||
lru_size = atoi(argv[2]);
|
||||
nr_tasks = atoi(argv[3]);
|
||||
|
||||
setbuf(stdout, NULL);
|
||||
|
||||
assert(!setrlimit(RLIMIT_MEMLOCK, &r));
|
||||
|
||||
srand(time(NULL));
|
||||
|
||||
nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
|
||||
assert(nr_cpus != -1);
|
||||
printf("nr_cpus:%d\n\n", nr_cpus);
|
||||
|
||||
nr_tasks = min(nr_tasks, nr_cpus);
|
||||
|
||||
dist_key_counts = read_keys(dist_file, &dist_keys);
|
||||
if (!dist_key_counts) {
|
||||
printf("%s has no key\n", dist_file);
|
||||
return -1;
|
||||
}
|
||||
|
||||
for (f = 0; f < sizeof(map_flags) / sizeof(*map_flags); f++) {
|
||||
test_lru_loss0(BPF_MAP_TYPE_LRU_HASH, map_flags[f]);
|
||||
test_lru_loss1(BPF_MAP_TYPE_LRU_HASH, map_flags[f]);
|
||||
test_parallel_lru_loss(BPF_MAP_TYPE_LRU_HASH, map_flags[f],
|
||||
nr_tasks);
|
||||
test_parallel_lru_dist(BPF_MAP_TYPE_LRU_HASH, map_flags[f],
|
||||
nr_tasks, lru_size);
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
free(dist_keys);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1,8 +1,8 @@
|
||||
CFLAGS += -Wall -O2
|
||||
CFLAGS += -Wall -O2 -I../../../../usr/include
|
||||
|
||||
test_objs = test_verifier test_maps
|
||||
test_objs = test_verifier test_maps test_lru_map
|
||||
|
||||
TEST_PROGS := test_verifier test_maps test_kmod.sh
|
||||
TEST_PROGS := test_verifier test_maps test_lru_map test_kmod.sh
|
||||
TEST_FILES := $(test_objs)
|
||||
|
||||
all: $(test_objs)
|
||||
|
||||
583
tools/testing/selftests/bpf/test_lru_map.c
Normal file
583
tools/testing/selftests/bpf/test_lru_map.c
Normal file
@ -0,0 +1,583 @@
|
||||
/*
|
||||
* 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 <stdio.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
#include <assert.h>
|
||||
#include <sched.h>
|
||||
#include <sys/wait.h>
|
||||
#include <stdlib.h>
|
||||
#include <time.h>
|
||||
#include "bpf_sys.h"
|
||||
|
||||
#define LOCAL_FREE_TARGET (128)
|
||||
#define PERCPU_FREE_TARGET (16)
|
||||
|
||||
static int nr_cpus;
|
||||
|
||||
static int create_map(int map_type, int map_flags, unsigned int size)
|
||||
{
|
||||
int map_fd;
|
||||
|
||||
map_fd = bpf_map_create(map_type, sizeof(unsigned long long),
|
||||
sizeof(unsigned long long), size, map_flags);
|
||||
|
||||
if (map_fd == -1)
|
||||
perror("bpf_map_create");
|
||||
|
||||
return map_fd;
|
||||
}
|
||||
|
||||
static int map_subset(int map0, int map1)
|
||||
{
|
||||
unsigned long long next_key = 0;
|
||||
unsigned long long value0[nr_cpus], value1[nr_cpus];
|
||||
int ret;
|
||||
|
||||
while (!bpf_map_next_key(map1, &next_key, &next_key)) {
|
||||
assert(!bpf_map_lookup(map1, &next_key, value1));
|
||||
ret = bpf_map_lookup(map0, &next_key, value0);
|
||||
if (ret) {
|
||||
printf("key:%llu not found from map. %s(%d)\n",
|
||||
next_key, strerror(errno), errno);
|
||||
return 0;
|
||||
}
|
||||
if (value0[0] != value1[0]) {
|
||||
printf("key:%llu value0:%llu != value1:%llu\n",
|
||||
next_key, value0[0], value1[0]);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int map_equal(int lru_map, int expected)
|
||||
{
|
||||
return map_subset(lru_map, expected) && map_subset(expected, lru_map);
|
||||
}
|
||||
|
||||
static int sched_next_online(int pid, int next_to_try)
|
||||
{
|
||||
cpu_set_t cpuset;
|
||||
|
||||
if (next_to_try == nr_cpus)
|
||||
return -1;
|
||||
|
||||
while (next_to_try < nr_cpus) {
|
||||
CPU_ZERO(&cpuset);
|
||||
CPU_SET(next_to_try++, &cpuset);
|
||||
if (!sched_setaffinity(pid, sizeof(cpuset), &cpuset))
|
||||
break;
|
||||
}
|
||||
|
||||
return next_to_try;
|
||||
}
|
||||
|
||||
/* Size of the LRU amp is 2
|
||||
* Add key=1 (+1 key)
|
||||
* Add key=2 (+1 key)
|
||||
* Lookup Key=1
|
||||
* Add Key=3
|
||||
* => Key=2 will be removed by LRU
|
||||
* Iterate map. Only found key=1 and key=3
|
||||
*/
|
||||
static void test_lru_sanity0(int map_type, int map_flags)
|
||||
{
|
||||
unsigned long long key, value[nr_cpus];
|
||||
int lru_map_fd, expected_map_fd;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
lru_map_fd = create_map(map_type, map_flags, 2 * nr_cpus);
|
||||
else
|
||||
lru_map_fd = create_map(map_type, map_flags, 2);
|
||||
assert(lru_map_fd != -1);
|
||||
|
||||
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, 2);
|
||||
assert(expected_map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
/* insert key=1 element */
|
||||
|
||||
key = 1;
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* BPF_NOEXIST means: add new element if it doesn't exist */
|
||||
assert(bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST) == -1 &&
|
||||
/* key=1 already exists */
|
||||
errno == EEXIST);
|
||||
|
||||
assert(bpf_map_update(lru_map_fd, &key, value, -1) == -1 &&
|
||||
errno == EINVAL);
|
||||
|
||||
/* insert key=2 element */
|
||||
|
||||
/* check that key=2 is not found */
|
||||
key = 2;
|
||||
assert(bpf_map_lookup(lru_map_fd, &key, value) == -1 &&
|
||||
errno == ENOENT);
|
||||
|
||||
/* BPF_EXIST means: update existing element */
|
||||
assert(bpf_map_update(lru_map_fd, &key, value, BPF_EXIST) == -1 &&
|
||||
/* key=2 is not there */
|
||||
errno == ENOENT);
|
||||
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* insert key=3 element */
|
||||
|
||||
/* check that key=3 is not found */
|
||||
key = 3;
|
||||
assert(bpf_map_lookup(lru_map_fd, &key, value) == -1 &&
|
||||
errno == ENOENT);
|
||||
|
||||
/* check that key=1 can be found and mark the ref bit to
|
||||
* stop LRU from removing key=1
|
||||
*/
|
||||
key = 1;
|
||||
assert(!bpf_map_lookup(lru_map_fd, &key, value));
|
||||
assert(value[0] == 1234);
|
||||
|
||||
key = 3;
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* key=2 has been removed from the LRU */
|
||||
key = 2;
|
||||
assert(bpf_map_lookup(lru_map_fd, &key, value) == -1);
|
||||
|
||||
assert(map_equal(lru_map_fd, expected_map_fd));
|
||||
|
||||
close(expected_map_fd);
|
||||
close(lru_map_fd);
|
||||
|
||||
printf("Pass\n");
|
||||
}
|
||||
|
||||
/* Size of the LRU map is 1.5*tgt_free
|
||||
* Insert 1 to tgt_free (+tgt_free keys)
|
||||
* Lookup 1 to tgt_free/2
|
||||
* Insert 1+tgt_free to 2*tgt_free (+tgt_free keys)
|
||||
* => 1+tgt_free/2 to LOCALFREE_TARGET will be removed by LRU
|
||||
*/
|
||||
static void test_lru_sanity1(int map_type, int map_flags, unsigned int tgt_free)
|
||||
{
|
||||
unsigned long long key, end_key, value[nr_cpus];
|
||||
int lru_map_fd, expected_map_fd;
|
||||
unsigned int batch_size;
|
||||
unsigned int map_size;
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
/* Ther percpu lru list (i.e each cpu has its own LRU
|
||||
* list) does not have a local free list. Hence,
|
||||
* it will only free old nodes till there is no free
|
||||
* from the LRU list. Hence, this test does not apply
|
||||
* to BPF_F_NO_COMMON_LRU
|
||||
*/
|
||||
return;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
batch_size = tgt_free / 2;
|
||||
assert(batch_size * 2 == tgt_free);
|
||||
|
||||
map_size = tgt_free + batch_size;
|
||||
lru_map_fd = create_map(map_type, map_flags, map_size);
|
||||
assert(lru_map_fd != -1);
|
||||
|
||||
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||||
assert(expected_map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
/* Insert 1 to tgt_free (+tgt_free keys) */
|
||||
end_key = 1 + tgt_free;
|
||||
for (key = 1; key < end_key; key++)
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* Lookup 1 to tgt_free/2 */
|
||||
end_key = 1 + batch_size;
|
||||
for (key = 1; key < end_key; key++) {
|
||||
assert(!bpf_map_lookup(lru_map_fd, &key, value));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
/* Insert 1+tgt_free to 2*tgt_free
|
||||
* => 1+tgt_free/2 to LOCALFREE_TARGET will be
|
||||
* removed by LRU
|
||||
*/
|
||||
key = 1 + tgt_free;
|
||||
end_key = key + tgt_free;
|
||||
for (; key < end_key; key++) {
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
assert(map_equal(lru_map_fd, expected_map_fd));
|
||||
|
||||
close(expected_map_fd);
|
||||
close(lru_map_fd);
|
||||
|
||||
printf("Pass\n");
|
||||
}
|
||||
|
||||
/* Size of the LRU map 1.5 * tgt_free
|
||||
* Insert 1 to tgt_free (+tgt_free keys)
|
||||
* Update 1 to tgt_free/2
|
||||
* => The original 1 to tgt_free/2 will be removed due to
|
||||
* the LRU shrink process
|
||||
* Re-insert 1 to tgt_free/2 again and do a lookup immeidately
|
||||
* Insert 1+tgt_free to tgt_free*3/2
|
||||
* Insert 1+tgt_free*3/2 to tgt_free*5/2
|
||||
* => Key 1+tgt_free to tgt_free*3/2
|
||||
* will be removed from LRU because it has never
|
||||
* been lookup and ref bit is not set
|
||||
*/
|
||||
static void test_lru_sanity2(int map_type, int map_flags, unsigned int tgt_free)
|
||||
{
|
||||
unsigned long long key, value[nr_cpus];
|
||||
unsigned long long end_key;
|
||||
int lru_map_fd, expected_map_fd;
|
||||
unsigned int batch_size;
|
||||
unsigned int map_size;
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
/* Ther percpu lru list (i.e each cpu has its own LRU
|
||||
* list) does not have a local free list. Hence,
|
||||
* it will only free old nodes till there is no free
|
||||
* from the LRU list. Hence, this test does not apply
|
||||
* to BPF_F_NO_COMMON_LRU
|
||||
*/
|
||||
return;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
batch_size = tgt_free / 2;
|
||||
assert(batch_size * 2 == tgt_free);
|
||||
|
||||
map_size = tgt_free + batch_size;
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
lru_map_fd = create_map(map_type, map_flags,
|
||||
map_size * nr_cpus);
|
||||
else
|
||||
lru_map_fd = create_map(map_type, map_flags, map_size);
|
||||
assert(lru_map_fd != -1);
|
||||
|
||||
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||||
assert(expected_map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
/* Insert 1 to tgt_free (+tgt_free keys) */
|
||||
end_key = 1 + tgt_free;
|
||||
for (key = 1; key < end_key; key++)
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* Any bpf_map_update will require to acquire a new node
|
||||
* from LRU first.
|
||||
*
|
||||
* The local list is running out of free nodes.
|
||||
* It gets from the global LRU list which tries to
|
||||
* shrink the inactive list to get tgt_free
|
||||
* number of free nodes.
|
||||
*
|
||||
* Hence, the oldest key 1 to tgt_free/2
|
||||
* are removed from the LRU list.
|
||||
*/
|
||||
key = 1;
|
||||
if (map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) {
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_delete(lru_map_fd, &key));
|
||||
} else {
|
||||
assert(bpf_map_update(lru_map_fd, &key, value, BPF_EXIST));
|
||||
}
|
||||
|
||||
/* Re-insert 1 to tgt_free/2 again and do a lookup
|
||||
* immeidately.
|
||||
*/
|
||||
end_key = 1 + batch_size;
|
||||
value[0] = 4321;
|
||||
for (key = 1; key < end_key; key++) {
|
||||
assert(bpf_map_lookup(lru_map_fd, &key, value));
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_lookup(lru_map_fd, &key, value));
|
||||
assert(value[0] == 4321);
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
/* Insert 1+tgt_free to tgt_free*3/2 */
|
||||
end_key = 1 + tgt_free + batch_size;
|
||||
for (key = 1 + tgt_free; key < end_key; key++)
|
||||
/* These newly added but not referenced keys will be
|
||||
* gone during the next LRU shrink.
|
||||
*/
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* Insert 1+tgt_free*3/2 to tgt_free*5/2 */
|
||||
end_key = key + tgt_free;
|
||||
for (; key < end_key; key++) {
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
assert(map_equal(lru_map_fd, expected_map_fd));
|
||||
|
||||
close(expected_map_fd);
|
||||
close(lru_map_fd);
|
||||
|
||||
printf("Pass\n");
|
||||
}
|
||||
|
||||
/* Size of the LRU map is 2*tgt_free
|
||||
* It is to test the active/inactive list rotation
|
||||
* Insert 1 to 2*tgt_free (+2*tgt_free keys)
|
||||
* Lookup key 1 to tgt_free*3/2
|
||||
* Add 1+2*tgt_free to tgt_free*5/2 (+tgt_free/2 keys)
|
||||
* => key 1+tgt_free*3/2 to 2*tgt_free are removed from LRU
|
||||
*/
|
||||
static void test_lru_sanity3(int map_type, int map_flags, unsigned int tgt_free)
|
||||
{
|
||||
unsigned long long key, end_key, value[nr_cpus];
|
||||
int lru_map_fd, expected_map_fd;
|
||||
unsigned int batch_size;
|
||||
unsigned int map_size;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
batch_size = tgt_free / 2;
|
||||
assert(batch_size * 2 == tgt_free);
|
||||
|
||||
map_size = tgt_free * 2;
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
lru_map_fd = create_map(map_type, map_flags,
|
||||
map_size * nr_cpus);
|
||||
else
|
||||
lru_map_fd = create_map(map_type, map_flags, map_size);
|
||||
assert(lru_map_fd != -1);
|
||||
|
||||
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||||
assert(expected_map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
/* Insert 1 to 2*tgt_free (+2*tgt_free keys) */
|
||||
end_key = 1 + (2 * tgt_free);
|
||||
for (key = 1; key < end_key; key++)
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
/* Lookup key 1 to tgt_free*3/2 */
|
||||
end_key = tgt_free + batch_size;
|
||||
for (key = 1; key < end_key; key++) {
|
||||
assert(!bpf_map_lookup(lru_map_fd, &key, value));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
/* Add 1+2*tgt_free to tgt_free*5/2
|
||||
* (+tgt_free/2 keys)
|
||||
*/
|
||||
key = 2 * tgt_free + 1;
|
||||
end_key = key + batch_size;
|
||||
for (; key < end_key; key++) {
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
assert(map_equal(lru_map_fd, expected_map_fd));
|
||||
|
||||
close(expected_map_fd);
|
||||
close(lru_map_fd);
|
||||
|
||||
printf("Pass\n");
|
||||
}
|
||||
|
||||
/* Test deletion */
|
||||
static void test_lru_sanity4(int map_type, int map_flags, unsigned int tgt_free)
|
||||
{
|
||||
int lru_map_fd, expected_map_fd;
|
||||
unsigned long long key, value[nr_cpus];
|
||||
unsigned long long end_key;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
assert(sched_next_online(0, 0) != -1);
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
lru_map_fd = create_map(map_type, map_flags,
|
||||
3 * tgt_free * nr_cpus);
|
||||
else
|
||||
lru_map_fd = create_map(map_type, map_flags, 3 * tgt_free);
|
||||
assert(lru_map_fd != -1);
|
||||
|
||||
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0,
|
||||
3 * tgt_free);
|
||||
assert(expected_map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
for (key = 1; key <= 2 * tgt_free; key++)
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
key = 1;
|
||||
assert(bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
for (key = 1; key <= tgt_free; key++) {
|
||||
assert(!bpf_map_lookup(lru_map_fd, &key, value));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
for (; key <= 2 * tgt_free; key++) {
|
||||
assert(!bpf_map_delete(lru_map_fd, &key));
|
||||
assert(bpf_map_delete(lru_map_fd, &key));
|
||||
}
|
||||
|
||||
end_key = key + 2 * tgt_free;
|
||||
for (; key < end_key; key++) {
|
||||
assert(!bpf_map_update(lru_map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_update(expected_map_fd, &key, value,
|
||||
BPF_NOEXIST));
|
||||
}
|
||||
|
||||
assert(map_equal(lru_map_fd, expected_map_fd));
|
||||
|
||||
close(expected_map_fd);
|
||||
close(lru_map_fd);
|
||||
|
||||
printf("Pass\n");
|
||||
}
|
||||
|
||||
static void do_test_lru_sanity5(unsigned long long last_key, int map_fd)
|
||||
{
|
||||
unsigned long long key, value[nr_cpus];
|
||||
|
||||
/* Ensure the last key inserted by previous CPU can be found */
|
||||
assert(!bpf_map_lookup(map_fd, &last_key, value));
|
||||
|
||||
value[0] = 1234;
|
||||
|
||||
key = last_key + 1;
|
||||
assert(!bpf_map_update(map_fd, &key, value, BPF_NOEXIST));
|
||||
assert(!bpf_map_lookup(map_fd, &key, value));
|
||||
|
||||
/* Cannot find the last key because it was removed by LRU */
|
||||
assert(bpf_map_lookup(map_fd, &last_key, value));
|
||||
}
|
||||
|
||||
/* Test map with only one element */
|
||||
static void test_lru_sanity5(int map_type, int map_flags)
|
||||
{
|
||||
unsigned long long key, value[nr_cpus];
|
||||
int next_sched_cpu = 0;
|
||||
int map_fd;
|
||||
int i;
|
||||
|
||||
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||||
return;
|
||||
|
||||
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||||
map_flags);
|
||||
|
||||
map_fd = create_map(map_type, map_flags, 1);
|
||||
assert(map_fd != -1);
|
||||
|
||||
value[0] = 1234;
|
||||
key = 0;
|
||||
assert(!bpf_map_update(map_fd, &key, value, BPF_NOEXIST));
|
||||
|
||||
for (i = 0; i < nr_cpus; i++) {
|
||||
pid_t pid;
|
||||
|
||||
pid = fork();
|
||||
if (pid == 0) {
|
||||
next_sched_cpu = sched_next_online(0, next_sched_cpu);
|
||||
if (next_sched_cpu != -1)
|
||||
do_test_lru_sanity5(key, map_fd);
|
||||
exit(0);
|
||||
} else if (pid == -1) {
|
||||
printf("couldn't spawn #%d process\n", i);
|
||||
exit(1);
|
||||
} else {
|
||||
int status;
|
||||
|
||||
/* It is mostly redundant and just allow the parent
|
||||
* process to update next_shced_cpu for the next child
|
||||
* process
|
||||
*/
|
||||
next_sched_cpu = sched_next_online(pid, next_sched_cpu);
|
||||
|
||||
assert(waitpid(pid, &status, 0) == pid);
|
||||
assert(status == 0);
|
||||
key++;
|
||||
}
|
||||
}
|
||||
|
||||
close(map_fd);
|
||||
|
||||
printf("Pass\n");
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
||||
int map_types[] = {BPF_MAP_TYPE_LRU_HASH,
|
||||
BPF_MAP_TYPE_LRU_PERCPU_HASH};
|
||||
int map_flags[] = {0, BPF_F_NO_COMMON_LRU};
|
||||
int t, f;
|
||||
|
||||
setbuf(stdout, NULL);
|
||||
|
||||
assert(!setrlimit(RLIMIT_MEMLOCK, &r));
|
||||
|
||||
nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
|
||||
assert(nr_cpus != -1);
|
||||
printf("nr_cpus:%d\n\n", nr_cpus);
|
||||
|
||||
for (f = 0; f < sizeof(map_flags) / sizeof(*map_flags); f++) {
|
||||
unsigned int tgt_free = (map_flags[f] & BPF_F_NO_COMMON_LRU) ?
|
||||
PERCPU_FREE_TARGET : LOCAL_FREE_TARGET;
|
||||
|
||||
for (t = 0; t < sizeof(map_types) / sizeof(*map_types); t++) {
|
||||
test_lru_sanity0(map_types[t], map_flags[f]);
|
||||
test_lru_sanity1(map_types[t], map_flags[f], tgt_free);
|
||||
test_lru_sanity2(map_types[t], map_flags[f], tgt_free);
|
||||
test_lru_sanity3(map_types[t], map_flags[f], tgt_free);
|
||||
test_lru_sanity4(map_types[t], map_flags[f], tgt_free);
|
||||
test_lru_sanity5(map_types[t], map_flags[f]);
|
||||
|
||||
printf("\n");
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user