Differential D12674 Diff 36846 contrib/tracing/connectblock_benchmark.bt

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contrib/tracing/connectblock_benchmark.bt

#!/usr/bin/env bpftrace		#!/usr/bin/env bpftrace

/*		/*

USAGE:		USAGE:

BPFTRACE_STRLEN=65 bpftrace contrib/tracing/connectblock_benchmark.bt <start height> <end height> <logging threshold in ms>		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		- <start height> sets the height at which the benchmark should start. Setting
the start height to 0 starts the benchmark immediately, even before the		the start height to 0 starts the benchmark immediately, even before the
first block is connected.		first block is connected.
- <end height> sets the height after which the benchmark should end. Setting		- <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		the end height to 0 disables the benchmark. The script only logs blocks
over <logging threshold in ms>.		over <logging threshold in ms>.
- Threshold <logging threshold in ms>		- Threshold <logging threshold in ms>

This script requires a 'bitcoind' binary compiled with eBPF support and the		This script requires a 'bitcoind' binary compiled with eBPF support and the
'validation:block_connected' USDT. By default, it's assumed that 'bitcoind' is		'validation:block_connected' USDT. By default, it's assumed that 'bitcoind' is
located in './src/bitcoind'. This can be modified in the script below.		located in './src/bitcoind'. This can be modified in the script below.

EXAMPLES:		EXAMPLES:

BPFTRACE_STRLEN=65 bpftrace contrib/tracing/connectblock_benchmark.bt 300000 680000 1000		bpftrace contrib/tracing/connectblock_benchmark.bt 300000 680000 1000

When run together 'bitcoind -reindex', this benchmarks the time it takes to		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		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		details about all blocks that take longer than 1000ms to connect. Prints a
histogram with block connection times when the benchmark is finished.		histogram with block connection times when the benchmark is finished.


BPFTRACE_STRLEN=65 bpftrace contrib/tracing/connectblock_benchmark.bt 0 0 500		bpftrace contrib/tracing/connectblock_benchmark.bt 0 0 500

When running together 'bitcoind', all newly connected blocks that		When running together 'bitcoind', all newly connected blocks that
take longer than 500ms to connect are logged. A histogram with block		take longer than 500ms to connect are logged. A histogram with block
connection times is shown when the script is terminated.		connection times is shown when the script is terminated.

*/		*/

BEGIN		BEGIN
Show All 27 Lines	/*
connected block is between the start and end height (or the end height is		connected block is between the start and end height (or the end height is
unset).		unset).
*/		*/
usdt:./src/bitcoind:validation:block_connected /arg1 >= $1 && (arg1 <= $2 \|\| $2 == 0 )/		usdt:./src/bitcoind:validation:block_connected /arg1 >= $1 && (arg1 <= $2 \|\| $2 == 0 )/
{		{
$height = arg1;		$height = arg1;
$transactions = arg2;		$transactions = arg2;
$inputs = arg3;		$inputs = arg3;
$sigops = arg4;		$sigchecks = arg4;
$duration = (uint64) arg5;		$duration = (uint64) arg5;

@height = $height;		@height = $height;

@blocks = @blocks + 1;		@blocks = @blocks + 1;
@transactions = @transactions + $transactions;		@transactions = @transactions + $transactions;
@inputs = @inputs + $inputs;		@inputs = @inputs + $inputs;
@sigops = @sigops + $sigops;		@sigchecks = @sigchecks + $sigchecks;

@durations = hist($duration / 1000);		@durations = hist($duration / 1000);

if ($height == $1 && $height != 0) {		if ($height == $1 && $height != 0) {
@start = nsecs;		@start = nsecs;
printf("Starting Connect Block Benchmark between height %d and %d.\n", $1, $2);		printf("Starting Connect Block Benchmark between height %d and %d.\n", $1, $2);
}		}

if ($2 > 0 && $height >= $2) {		if ($2 > 0 && $height >= $2) {
@end = nsecs;		@end = nsecs;
$duration = @end - @start;		$duration = @end - @start;
printf("\nTook %d ms to connect the blocks between height %d and %d.\n", $duration / 1000000, $1, $2);		printf("\nTook %d ms to connect the blocks between height %d and %d.\n", $duration / 1000000, $1, $2);
exit();		exit();
}		}
}		}

/*		/*
Attaches to the 'validation:block_connected' USDT and logs information about		Attaches to the 'validation:block_connected' USDT and logs information about
blocks where the time it took to connect the block is above the		blocks where the time it took to connect the block is above the
<logging threshold in ms>.		<logging threshold in ms>.
*/		*/
usdt:./src/bitcoind:validation:block_connected / (uint64) arg5 / 1000> $3 /		usdt:./src/bitcoind:validation:block_connected / (uint64) arg5 / 1000> $3 /
{		{
$hash_str = str(arg0);		$hash = arg0;
$height = (int32) arg1;		$height = (int32) arg1;
$transactions = (uint64) arg2;		$transactions = (uint64) arg2;
$inputs = (int32) arg3;		$inputs = (int32) arg3;
$sigops = (int64) arg4;		$sigchecks = (int64) arg4;
$duration = (int64) arg5;		$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);
		printf("Block %d (", $height);
		/* Prints each byte of the block hash as hex in big-endian (the block-explorer format) */
		$p = $hash + 31;
		unroll(32) {
		$b = (uint8)$p;
		printf("%02x", $b);
		$p -= 1;
		}
		printf(") %4d tx %5d ins %5d sigchk took %4d ms\n", $transactions, $inputs, $sigchecks, (uint64) $duration / 1000);
}		}


/*		/*
Prints stats about the blocks, transactions, inputs, and sigops processed in		Prints stats about the blocks, transactions, inputs, and sigchecks processed
the last second (if any).		in the last second (if any).
*/		*/
interval:s:1 {		interval:s:1 {
if (@blocks > 0) {		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);		printf("BENCH %4d blk/s %6d tx/s %7d inputs/s %8d sigchk/s (height %d)\n", @blocks, @transactions, @inputs, @sigchecks, @height);

zero(@blocks);		zero(@blocks);
zero(@transactions);		zero(@transactions);
zero(@inputs);		zero(@inputs);
zero(@sigops);		zero(@sigchecks);
}		}
}		}

END		END
{		{
printf("\nHistogram of block connection times in milliseconds (ms).\n");		printf("\nHistogram of block connection times in milliseconds (ms).\n");
print(@durations);		print(@durations);

clear(@durations);		clear(@durations);
clear(@blocks);		clear(@blocks);
clear(@transactions);		clear(@transactions);
clear(@inputs);		clear(@inputs);
clear(@sigops);		clear(@sigchecks);
clear(@height);		clear(@height);
clear(@start);		clear(@start);
clear(@end);		clear(@end);
}		}