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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
#!/usr/bin/env bpftrace
/*
USAGE:
BPFTRACE_STRLEN=65 bpftrace contrib/tracing/connectblock_benchmark.bt <start height> <end height> <logging threshold in ms>
- The environment variable BPFTRACE_STRLEN needs to be set to 65 chars as
strings are limited to 64 chars by default. Hex strings with Bitcoin block
hashes are 64 hex chars + 1 null-termination char.
- <start height> sets the height at which the benchmark should start. Setting
the start height to 0 starts the benchmark immediately, even before the
first block is connected.
- <end height> sets the height after which the benchmark should end. Setting
the end height to 0 disables the benchmark. The script only logs blocks
over <logging threshold in ms>.
- Threshold <logging threshold in ms>
This script requires a 'bitcoind' binary compiled with eBPF support and the
'validation:block_connected' USDT. By default, it's assumed that 'bitcoind' is
located in './src/bitcoind'. This can be modified in the script below.
EXAMPLES:
BPFTRACE_STRLEN=65 bpftrace contrib/tracing/connectblock_benchmark.bt 300000 680000 1000
When run together 'bitcoind -reindex', this benchmarks the time it takes to
connect the blocks between height 300.000 and 680.000 (inclusive) and prints
details about all blocks that take longer than 1000ms to connect. Prints a
histogram with block connection times when the benchmark is finished.
BPFTRACE_STRLEN=65 bpftrace contrib/tracing/connectblock_benchmark.bt 0 0 500
When running together 'bitcoind', all newly connected blocks that
take longer than 500ms to connect are logged. A histogram with block
connection times is shown when the script is terminated.
*/
BEGIN
{
$start_height = $1;
$end_height = $2;
$logging_threshold_ms = $3;
if ($end_height < $start_height) {
printf("Error: start height (%d) larger than end height (%d)!\n", $start_height, $end_height);
exit();
}
if ($end_height > 0) {
printf("ConnectBlock benchmark between height %d and %d inclusive\n", $start_height, $end_height);
} else {
printf("ConnectBlock logging starting at height %d\n", $start_height);
}
if ($logging_threshold_ms > 0) {
printf("Logging blocks taking longer than %d ms to connect.\n", $3);
}
if ($start_height == 0) {
@start = nsecs;
}
}
/*
Attaches to the 'validation:block_connected' USDT and collects stats when the
connected block is between the start and end height (or the end height is
unset).
*/
usdt:./src/bitcoind:validation:block_connected /arg1 >= $1 && (arg1 <= $2 || $2 == 0 )/
{
$height = arg1;
$transactions = arg2;
$inputs = arg3;
$sigops = arg4;
$duration = (uint64) arg5;
@height = $height;
@blocks = @blocks + 1;
@transactions = @transactions + $transactions;
@inputs = @inputs + $inputs;
@sigops = @sigops + $sigops;
@durations = hist($duration / 1000);
if ($height == $1 && $height != 0) {
@start = nsecs;
printf("Starting Connect Block Benchmark between height %d and %d.\n", $1, $2);
}
if ($2 > 0 && $height >= $2) {
@end = nsecs;
$duration = @end - @start;
printf("\nTook %d ms to connect the blocks between height %d and %d.\n", $duration / 1000000, $1, $2);
exit();
}
}
/*
Attaches to the 'validation:block_connected' USDT and logs information about
blocks where the time it took to connect the block is above the
<logging threshold in ms>.
*/
usdt:./src/bitcoind:validation:block_connected / (uint64) arg5 / 1000> $3 /
{
$hash_str = str(arg0);
$height = (int32) arg1;
$transactions = (uint64) arg2;
$inputs = (int32) arg3;
$sigops = (int64) arg4;
$duration = (int64) arg5;
printf("Block %d (%s) %4d tx %5d ins %5d sigops took %4d ms\n", $height, $hash_str, $transactions, $inputs, $sigops, (uint64) $duration / 1000);
}
/*
Prints stats about the blocks, transactions, inputs, and sigops processed in
the last second (if any).
*/
interval:s:1 {
if (@blocks > 0) {
printf("BENCH %4d blk/s %6d tx/s %7d inputs/s %8d sigops/s (height %d)\n", @blocks, @transactions, @inputs, @sigops, @height);
zero(@blocks);
zero(@transactions);
zero(@inputs);
zero(@sigops);
}
}
END
{
printf("\nHistogram of block connection times in milliseconds (ms).\n");
print(@durations);
clear(@durations);
clear(@blocks);
clear(@transactions);
clear(@inputs);
clear(@sigops);
clear(@height);
clear(@start);
clear(@end);
}
|
