samples/bpf/map_perf_test.bpf.c

   1 /* Copyright (c) 2016 Facebook
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of version 2 of the GNU General Public
   5  * License as published by the Free Software Foundation.
   6  */
   7 #include "vmlinux.h"
   8 #include <errno.h>
   9 #include <linux/version.h>
  10 #include <bpf/bpf_helpers.h>
  11 #include <bpf/bpf_tracing.h>
  12 #include <bpf/bpf_core_read.h>
  13
  14 #define MAX_ENTRIES 1000
  15 #define MAX_NR_CPUS 1024
  16
  17 struct {
  18         __uint(type, BPF_MAP_TYPE_HASH);
  19         __type(key, u32);
  20         __type(value, long);
  21         __uint(max_entries, MAX_ENTRIES);
  22 } hash_map SEC(".maps");
  23
  24 struct {
  25         __uint(type, BPF_MAP_TYPE_LRU_HASH);
  26         __type(key, u32);
  27         __type(value, long);
  28         __uint(max_entries, 10000);
  29 } lru_hash_map SEC(".maps");
  30
  31 struct {
  32         __uint(type, BPF_MAP_TYPE_LRU_HASH);
  33         __type(key, u32);
  34         __type(value, long);
  35         __uint(max_entries, 10000);
  36         __uint(map_flags, BPF_F_NO_COMMON_LRU);
  37 } nocommon_lru_hash_map SEC(".maps");
  38
  39 struct inner_lru {
  40         __uint(type, BPF_MAP_TYPE_LRU_HASH);
  41         __type(key, u32);
  42         __type(value, long);
  43         __uint(max_entries, MAX_ENTRIES);
  44         __uint(map_flags, BPF_F_NUMA_NODE);
  45         __uint(numa_node, 0);
  46 } inner_lru_hash_map SEC(".maps");
  47
  48 struct {
  49         __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
  50         __uint(max_entries, MAX_NR_CPUS);
  51         __uint(key_size, sizeof(u32));
  52         __array(values, struct inner_lru); /* use inner_lru as inner map */
  53 } array_of_lru_hashs SEC(".maps") = {
  54         /* statically initialize the first element */
  55         .values = { &inner_lru_hash_map },
  56 };
  57
  58 struct {
  59         __uint(type, BPF_MAP_TYPE_PERCPU_HASH);
  60         __uint(key_size, sizeof(u32));
  61         __uint(value_size, sizeof(long));
  62         __uint(max_entries, MAX_ENTRIES);
  63 } percpu_hash_map SEC(".maps");
  64
  65 struct {
  66         __uint(type, BPF_MAP_TYPE_HASH);
  67         __type(key, u32);
  68         __type(value, long);
  69         __uint(max_entries, MAX_ENTRIES);
  70         __uint(map_flags, BPF_F_NO_PREALLOC);
  71 } hash_map_alloc SEC(".maps");
  72
  73 struct {
  74         __uint(type, BPF_MAP_TYPE_PERCPU_HASH);
  75         __uint(key_size, sizeof(u32));
  76         __uint(value_size, sizeof(long));
  77         __uint(max_entries, MAX_ENTRIES);
  78         __uint(map_flags, BPF_F_NO_PREALLOC);
  79 } percpu_hash_map_alloc SEC(".maps");
  80
  81 struct {
  82         __uint(type, BPF_MAP_TYPE_LPM_TRIE);
  83         __uint(key_size, 8);
  84         __uint(value_size, sizeof(long));
  85         __uint(max_entries, 10000);
  86         __uint(map_flags, BPF_F_NO_PREALLOC);
  87 } lpm_trie_map_alloc SEC(".maps");
  88
  89 struct {
  90         __uint(type, BPF_MAP_TYPE_ARRAY);
  91         __type(key, u32);
  92         __type(value, long);
  93         __uint(max_entries, MAX_ENTRIES);
  94 } array_map SEC(".maps");
  95
  96 struct {
  97         __uint(type, BPF_MAP_TYPE_LRU_HASH);
  98         __type(key, u32);
  99         __type(value, long);
 100         __uint(max_entries, MAX_ENTRIES);
 101 } lru_hash_lookup_map SEC(".maps");
 102
 103 SEC("ksyscall/getuid")
 104 int BPF_KSYSCALL(stress_hmap)
 105 {
 106         u32 key = bpf_get_current_pid_tgid();
 107         long init_val = 1;
 108         long *value;
 109         int i;
 110
 111         for (i = 0; i < 10; i++) {
 112                 bpf_map_update_elem(&hash_map, &key, &init_val, BPF_ANY);
 113                 value = bpf_map_lookup_elem(&hash_map, &key);
 114                 if (value)
 115                         bpf_map_delete_elem(&hash_map, &key);
 116         }
 117
 118         return 0;
 119 }
 120
 121 SEC("ksyscall/geteuid")
 122 int BPF_KSYSCALL(stress_percpu_hmap)
 123 {
 124         u32 key = bpf_get_current_pid_tgid();
 125         long init_val = 1;
 126         long *value;
 127         int i;
 128
 129         for (i = 0; i < 10; i++) {
 130                 bpf_map_update_elem(&percpu_hash_map, &key, &init_val, BPF_ANY);
 131                 value = bpf_map_lookup_elem(&percpu_hash_map, &key);
 132                 if (value)
 133                         bpf_map_delete_elem(&percpu_hash_map, &key);
 134         }
 135         return 0;
 136 }
 137
 138 SEC("ksyscall/getgid")
 139 int BPF_KSYSCALL(stress_hmap_alloc)
 140 {
 141         u32 key = bpf_get_current_pid_tgid();
 142         long init_val = 1;
 143         long *value;
 144         int i;
 145
 146         for (i = 0; i < 10; i++) {
 147                 bpf_map_update_elem(&hash_map_alloc, &key, &init_val, BPF_ANY);
 148                 value = bpf_map_lookup_elem(&hash_map_alloc, &key);
 149                 if (value)
 150                         bpf_map_delete_elem(&hash_map_alloc, &key);
 151         }
 152         return 0;
 153 }
 154
 155 SEC("ksyscall/getegid")
 156 int BPF_KSYSCALL(stress_percpu_hmap_alloc)
 157 {
 158         u32 key = bpf_get_current_pid_tgid();
 159         long init_val = 1;
 160         long *value;
 161         int i;
 162
 163         for (i = 0; i < 10; i++) {
 164                 bpf_map_update_elem(&percpu_hash_map_alloc, &key, &init_val, BPF_ANY);
 165                 value = bpf_map_lookup_elem(&percpu_hash_map_alloc, &key);
 166                 if (value)
 167                         bpf_map_delete_elem(&percpu_hash_map_alloc, &key);
 168         }
 169         return 0;
 170 }
 171 SEC("ksyscall/connect")
 172 int BPF_KSYSCALL(stress_lru_hmap_alloc, int fd, struct sockaddr_in *uservaddr,
 173                  int addrlen)
 174 {
 175         char fmt[] = "Failed at stress_lru_hmap_alloc. ret:%dn";
 176         union {
 177                 u16 dst6[8];
 178                 struct {
 179                         u16 magic0;
 180                         u16 magic1;
 181                         u16 tcase;
 182                         u16 unused16;
 183                         u32 unused32;
 184                         u32 key;
 185                 };
 186         } test_params;
 187         struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)uservaddr;
 188         u16 test_case;
 189         long val = 1;
 190         u32 key = 0;
 191         int ret;
 192
 193         if (addrlen != sizeof(*in6))
 194                 return 0;
 195
 196         ret = bpf_probe_read_user(test_params.dst6, sizeof(test_params.dst6),
 197                                   &in6->sin6_addr);
 198         if (ret)
 199                 goto done;
 200
 201         if (test_params.magic0 != 0xdead ||
 202             test_params.magic1 != 0xbeef)
 203                 return 0;
 204
 205         test_case = test_params.tcase;
 206         if (test_case != 3)
 207                 key = bpf_get_prandom_u32();
 208
 209         if (test_case == 0) {
 210                 ret = bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
 211         } else if (test_case == 1) {
 212                 ret = bpf_map_update_elem(&nocommon_lru_hash_map, &key, &val,
 213                                           BPF_ANY);
 214         } else if (test_case == 2) {
 215                 void *nolocal_lru_map;
 216                 int cpu = bpf_get_smp_processor_id();
 217
 218                 nolocal_lru_map = bpf_map_lookup_elem(&array_of_lru_hashs,
 219                                                       &cpu);
 220                 if (!nolocal_lru_map) {
 221                         ret = -ENOENT;
 222                         goto done;
 223                 }
 224
 225                 ret = bpf_map_update_elem(nolocal_lru_map, &key, &val,
 226                                           BPF_ANY);
 227         } else if (test_case == 3) {
 228                 u32 i;
 229
 230                 key = test_params.key;
 231
 232 #pragma clang loop unroll(full)
 233                 for (i = 0; i < 32; i++) {
 234                         bpf_map_lookup_elem(&lru_hash_lookup_map, &key);
 235                         key++;
 236                 }
 237         } else {
 238                 ret = -EINVAL;
 239         }
 240
 241 done:
 242         if (ret)
 243                 bpf_trace_printk(fmt, sizeof(fmt), ret);
 244
 245         return 0;
 246 }
 247
 248 SEC("ksyscall/gettid")
 249 int BPF_KSYSCALL(stress_lpm_trie_map_alloc)
 250 {
 251         union {
 252                 u32 b32[2];
 253                 u8 b8[8];
 254         } key;
 255         unsigned int i;
 256
 257         key.b32[0] = 32;
 258         key.b8[4] = 192;
 259         key.b8[5] = 168;
 260         key.b8[6] = 0;
 261         key.b8[7] = 1;
 262
 263 #pragma clang loop unroll(full)
 264         for (i = 0; i < 32; ++i)
 265                 bpf_map_lookup_elem(&lpm_trie_map_alloc, &key);
 266
 267         return 0;
 268 }
 269
 270 SEC("ksyscall/getpgid")
 271 int BPF_KSYSCALL(stress_hash_map_lookup)
 272 {
 273         u32 key = 1, i;
 274         long *value;
 275
 276 #pragma clang loop unroll(full)
 277         for (i = 0; i < 64; ++i)
 278                 value = bpf_map_lookup_elem(&hash_map, &key);
 279
 280         return 0;
 281 }
 282
 283 SEC("ksyscall/getppid")
 284 int BPF_KSYSCALL(stress_array_map_lookup)
 285 {
 286         u32 key = 1, i;
 287         long *value;
 288
 289 #pragma clang loop unroll(full)
 290         for (i = 0; i < 64; ++i)
 291                 value = bpf_map_lookup_elem(&array_map, &key);
 292
 293         return 0;
 294 }
 295
 296 char _license[] SEC("license") = "GPL";
 297 u32 _version SEC("version") = LINUX_VERSION_CODE;