samples/bpf/map_perf_test_kern.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 <linux/skbuff.h>
   8 #include <linux/netdevice.h>
   9 #include <linux/version.h>
  10 #include <uapi/linux/bpf.h>
  11 #include "bpf_helpers.h"
  12
  13 #define MAX_ENTRIES 1000
  14
  15 struct bpf_map_def SEC("maps") hash_map = {
  16         .type = BPF_MAP_TYPE_HASH,
  17         .key_size = sizeof(u32),
  18         .value_size = sizeof(long),
  19         .max_entries = MAX_ENTRIES,
  20 };
  21
  22 struct bpf_map_def SEC("maps") lru_hash_map = {
  23         .type = BPF_MAP_TYPE_LRU_HASH,
  24         .key_size = sizeof(u32),
  25         .value_size = sizeof(long),
  26         .max_entries = 10000,
  27 };
  28
  29 struct bpf_map_def SEC("maps") percpu_lru_hash_map = {
  30         .type = BPF_MAP_TYPE_LRU_HASH,
  31         .key_size = sizeof(u32),
  32         .value_size = sizeof(long),
  33         .max_entries = 10000,
  34         .map_flags = BPF_F_NO_COMMON_LRU,
  35 };
  36
  37 struct bpf_map_def SEC("maps") percpu_hash_map = {
  38         .type = BPF_MAP_TYPE_PERCPU_HASH,
  39         .key_size = sizeof(u32),
  40         .value_size = sizeof(long),
  41         .max_entries = MAX_ENTRIES,
  42 };
  43
  44 struct bpf_map_def SEC("maps") hash_map_alloc = {
  45         .type = BPF_MAP_TYPE_HASH,
  46         .key_size = sizeof(u32),
  47         .value_size = sizeof(long),
  48         .max_entries = MAX_ENTRIES,
  49         .map_flags = BPF_F_NO_PREALLOC,
  50 };
  51
  52 struct bpf_map_def SEC("maps") percpu_hash_map_alloc = {
  53         .type = BPF_MAP_TYPE_PERCPU_HASH,
  54         .key_size = sizeof(u32),
  55         .value_size = sizeof(long),
  56         .max_entries = MAX_ENTRIES,
  57         .map_flags = BPF_F_NO_PREALLOC,
  58 };
  59
  60 SEC("kprobe/sys_getuid")
  61 int stress_hmap(struct pt_regs *ctx)
  62 {
  63         u32 key = bpf_get_current_pid_tgid();
  64         long init_val = 1;
  65         long *value;
  66
  67         bpf_map_update_elem(&hash_map, &key, &init_val, BPF_ANY);
  68         value = bpf_map_lookup_elem(&hash_map, &key);
  69         if (value)
  70                 bpf_map_delete_elem(&hash_map, &key);
  71
  72         return 0;
  73 }
  74
  75 SEC("kprobe/sys_geteuid")
  76 int stress_percpu_hmap(struct pt_regs *ctx)
  77 {
  78         u32 key = bpf_get_current_pid_tgid();
  79         long init_val = 1;
  80         long *value;
  81
  82         bpf_map_update_elem(&percpu_hash_map, &key, &init_val, BPF_ANY);
  83         value = bpf_map_lookup_elem(&percpu_hash_map, &key);
  84         if (value)
  85                 bpf_map_delete_elem(&percpu_hash_map, &key);
  86         return 0;
  87 }
  88 SEC("kprobe/sys_getgid")
  89 int stress_hmap_alloc(struct pt_regs *ctx)
  90 {
  91         u32 key = bpf_get_current_pid_tgid();
  92         long init_val = 1;
  93         long *value;
  94
  95         bpf_map_update_elem(&hash_map_alloc, &key, &init_val, BPF_ANY);
  96         value = bpf_map_lookup_elem(&hash_map_alloc, &key);
  97         if (value)
  98                 bpf_map_delete_elem(&hash_map_alloc, &key);
  99         return 0;
 100 }
 101
 102 SEC("kprobe/sys_getegid")
 103 int stress_percpu_hmap_alloc(struct pt_regs *ctx)
 104 {
 105         u32 key = bpf_get_current_pid_tgid();
 106         long init_val = 1;
 107         long *value;
 108
 109         bpf_map_update_elem(&percpu_hash_map_alloc, &key, &init_val, BPF_ANY);
 110         value = bpf_map_lookup_elem(&percpu_hash_map_alloc, &key);
 111         if (value)
 112                 bpf_map_delete_elem(&percpu_hash_map_alloc, &key);
 113         return 0;
 114 }
 115
 116 SEC("kprobe/sys_getpid")
 117 int stress_lru_hmap_alloc(struct pt_regs *ctx)
 118 {
 119         u32 key = bpf_get_prandom_u32();
 120         long val = 1;
 121
 122         bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
 123
 124         return 0;
 125 }
 126
 127 SEC("kprobe/sys_getppid")
 128 int stress_percpu_lru_hmap_alloc(struct pt_regs *ctx)
 129 {
 130         u32 key = bpf_get_prandom_u32();
 131         long val = 1;
 132
 133         bpf_map_update_elem(&percpu_lru_hash_map, &key, &val, BPF_ANY);
 134
 135         return 0;
 136 }
 137
 138 char _license[] SEC("license") = "GPL";
 139 u32 _version SEC("version") = LINUX_VERSION_CODE;