1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
#!/usr/bin/env python
# Copyright (c) PLUMgrid, Inc.
# Licensed under the Apache License, Version 2.0 (the "License")
import os
import unittest
from bcc import BPF
import multiprocessing
class TestPercpu(unittest.TestCase):
def setUp(self):
try:
b = BPF(text='BPF_TABLE("percpu_array", u32, u32, stub, 1);')
except:
raise unittest.SkipTest("PerCpu unsupported on this kernel")
def test_helper(self):
test_prog1 = """
BPF_PERCPU_ARRAY(stub_default);
BPF_PERCPU_ARRAY(stub_type, u64);
BPF_PERCPU_ARRAY(stub_full, u64, 1024);
"""
BPF(text=test_prog1)
def test_u64(self):
test_prog1 = """
BPF_TABLE("percpu_hash", u32, u64, stats, 1);
int hello_world(void *ctx) {
u32 key=0;
u64 value = 0, *val;
val = stats.lookup_or_try_init(&key, &value);
if (val) {
*val += 1;
}
return 0;
}
"""
bpf_code = BPF(text=test_prog1)
stats_map = bpf_code.get_table("stats")
event_name = bpf_code.get_syscall_fnname("clone")
bpf_code.attach_kprobe(event=event_name, fn_name="hello_world")
ini = stats_map.Leaf()
for i in range(0, multiprocessing.cpu_count()):
ini[i] = 0
stats_map[ stats_map.Key(0) ] = ini
f = os.popen("hostname")
f.close()
self.assertEqual(len(stats_map),1)
val = stats_map[ stats_map.Key(0) ]
sum = stats_map.sum(stats_map.Key(0))
avg = stats_map.average(stats_map.Key(0))
max = stats_map.max(stats_map.Key(0))
self.assertGreater(sum.value, int(0))
self.assertGreater(max.value, int(0))
bpf_code.detach_kprobe(event_name)
def test_u32(self):
test_prog1 = """
BPF_TABLE("percpu_array", u32, u32, stats, 1);
int hello_world(void *ctx) {
u32 key=0;
u32 value = 0, *val;
val = stats.lookup_or_try_init(&key, &value);
if (val) {
*val += 1;
}
return 0;
}
"""
bpf_code = BPF(text=test_prog1)
stats_map = bpf_code.get_table("stats")
event_name = bpf_code.get_syscall_fnname("clone")
bpf_code.attach_kprobe(event=event_name, fn_name="hello_world")
ini = stats_map.Leaf()
for i in range(0, multiprocessing.cpu_count()):
ini[i] = 0
stats_map[ stats_map.Key(0) ] = ini
f = os.popen("hostname")
f.close()
self.assertEqual(len(stats_map),1)
val = stats_map[ stats_map.Key(0) ]
sum = stats_map.sum(stats_map.Key(0))
avg = stats_map.average(stats_map.Key(0))
max = stats_map.max(stats_map.Key(0))
self.assertGreater(sum.value, int(0))
self.assertGreater(max.value, int(0))
bpf_code.detach_kprobe(event_name)
def test_struct_custom_func(self):
test_prog2 = """
typedef struct counter {
u32 c1;
u32 c2;
} counter;
BPF_TABLE("percpu_hash", u32, counter, stats, 1);
int hello_world(void *ctx) {
u32 key=0;
counter value = {0,0}, *val;
val = stats.lookup_or_try_init(&key, &value);
if (val) {
val->c1 += 1;
val->c2 += 1;
}
return 0;
}
"""
bpf_code = BPF(text=test_prog2)
stats_map = bpf_code.get_table("stats",
reducer=lambda x,y: stats_map.sLeaf(x.c1+y.c1))
event_name = bpf_code.get_syscall_fnname("clone")
bpf_code.attach_kprobe(event=event_name, fn_name="hello_world")
ini = stats_map.Leaf()
for i in ini:
i = stats_map.sLeaf(0,0)
stats_map[ stats_map.Key(0) ] = ini
f = os.popen("hostname")
f.close()
self.assertEqual(len(stats_map),1)
k = stats_map[ stats_map.Key(0) ]
self.assertGreater(k.c1, int(0))
bpf_code.detach_kprobe(event_name)
if __name__ == "__main__":
unittest.main()
|
