4 Commits (master)

Author	SHA1	Message	Date
0xb10c	cd0edf26c0	tracing: cast block_connected duration to nanoseconds ... When the tracepoint was introduced in 8f37f5c2a5, the connect_block duration was passed in microseconds `µs`. By starting to use steady clock in fabf1cdb20 this changed to nanoseconds `ns`. As the test only checked if the duration value is `> 0` as a plausibility check, this went unnoticed. I detected this when setting up monitoring for block validation time as part of the Great Consensus Cleanup Revival discussion. This change casts the duration explicitly to nanoseconds (as it has been nanoseconds for the last three releases; switching back now would 'break' the broken API again; there don't seem to be many users affected), updates the documentation and adds a check for an upper bound to the tracepoint interface tests. The upper bound is quite lax as mining the block takes much longer than connecting the empty test block. It's however able to detect incorrect duration units passed.	2 months ago
Lőrinc	6a68343ffb	doc: Prepend 'build/' to binary paths under 'src/' in docs	2 months ago
0xb10c	53c9fa9e62	tracing: drop block_connected hash.toString() arg ... The tracepoint `validation:block_connected` was introduced in #22006. The first argument was the hash of the connected block as a pointer to a C-like String. The last argument passed the hash of the connected block as a pointer to 32 bytes. The hash was only passed as string to allow `bpftrace` scripts to print the hash. It was (incorrectly) assumed that `bpftrace` cannot hex-format and print the block hash given only the hash as bytes. The block hash can be printed in `bpftrace` by calling `printf("%02x")` for each byte of the hash in an `unroll () {...}`. By starting from the last byte of the hash, it can be printed in big-endian (the block-explorer format). ```C $p = $hash + 31; unroll(32) { $b = *(uint8*)$p; printf("%02x", $b); $p -= 1; } ``` See also: https://github.com/bitcoin/bitcoin/pull/22902#discussion_r705176691 This is a breaking change to the block_connected tracepoint API, however this tracepoint has not yet been included in a release.	3 years ago
0xb10c	8f37f5c2a5	tracing: Tracepoint for connected blocks ... Can, for example, be used to benchmark block connections.	3 years ago