bitcoin

History

Wladimir J. van der Laan 4ebe2f6e75 Merge #18011 : Replace current benchmarking framework with nanobench `78c312c983` Replace current benchmarking framework with nanobench (Martin Ankerl) Pull request description: Replace current benchmarking framework with nanobench This replaces the current benchmarking framework with nanobench [1], an MIT licensed single-header benchmarking library, of which I am the autor. This has in my opinion several advantages, especially on Linux: * fast: Running all benchmarks takes ~6 seconds instead of 4m13s on an Intel i7-8700 CPU @ 3.20GHz. * accurate: I ran e.g. the benchmark for SipHash_32b 10 times and calculate standard deviation / mean = coefficient of variation: * 0.57% CV for old benchmarking framework * 0.20% CV for nanobench So the benchmark results with nanobench seem to vary less than with the old framework. * It automatically determines runtime based on clock precision, no need to specify number of evaluations. * measure instructions, cycles, branches, instructions per cycle, branch misses (only Linux, when performance counters are available) * output in markdown table format. * Warn about unstable environment (frequency scaling, turbo, ...) * For better profiling, it is possible to set the environment variable NANOBENCH_ENDLESS to force endless running of a particular benchmark without the need to recompile. This makes it to e.g. run "perf top" and look at hotspots. Here is an example copy & pasted from the terminal output: \| ns/byte \| byte/s \| err% \| ins/byte \| cyc/byte \| IPC \| bra/byte \| miss% \| total \| benchmark \|--------------------:\|--------------------:\|--------:\|----------------:\|----------------:\|-------:\|---------------:\|--------:\|----------:\|:---------- \| 2.52 \| 396,529,415.94 \| 0.6% \| 25.42 \| 8.02 \| 3.169 \| 0.06 \| 0.0% \| 0.03 \| `bench/crypto_hash.cpp RIPEMD160` \| 1.87 \| 535,161,444.83 \| 0.3% \| 21.36 \| 5.95 \| 3.589 \| 0.06 \| 0.0% \| 0.02 \| `bench/crypto_hash.cpp SHA1` \| 3.22 \| 310,344,174.79 \| 1.1% \| 36.80 \| 10.22 \| 3.601 \| 0.09 \| 0.0% \| 0.04 \| `bench/crypto_hash.cpp SHA256` \| 2.01 \| 496,375,796.23 \| 0.0% \| 18.72 \| 6.43 \| 2.911 \| 0.01 \| 1.0% \| 0.00 \| `bench/crypto_hash.cpp SHA256D64_1024` \| 7.23 \| 138,263,519.35 \| 0.1% \| 82.66 \| 23.11 \| 3.577 \| 1.63 \| 0.1% \| 0.00 \| `bench/crypto_hash.cpp SHA256_32b` \| 3.04 \| 328,780,166.40 \| 0.3% \| 35.82 \| 9.69 \| 3.696 \| 0.03 \| 0.0% \| 0.03 \| `bench/crypto_hash.cpp SHA512` [1] https://github.com/martinus/nanobench ACKs for top commit: laanwj: ACK `78c312c983` Tree-SHA512: 9e18770b18b6f95a7d0105a4a5497d31cf4eb5efe6574f4482f6f1b4c88d7e0946b9a4a1e9e8e6ecbf41a3f2d7571240677dcb45af29a6f0584e89b25f32e49e		4 years ago
..
debian	…
devtools	Merge #18011 : Replace current benchmarking framework with nanobench	4 years ago
gitian-descriptors	macos: Bump to xcode 11.3.1 and 10.15 SDK	4 years ago
gitian-keys	Merge #18619 : gitian: add jonatack gpg key fingerprint	5 years ago
guix	guix: Add clarifying documentation for V env var	5 years ago
init	…
linearize	scripted-diff: Bump copyright headers	5 years ago
macdeploy	macos: Bump to xcode 11.3.1 and 10.15 SDK	4 years ago
qos	scripted-diff: Bump copyright of files changed in 2019	5 years ago
seeds	scripted-diff: Bump copyright headers	5 years ago
testgen	docs: match usage text to script and location	4 years ago
verify-commits	scripted-diff: Bump copyright headers	5 years ago
verifybinaries	scripted-diff: Bump copyright of files changed in 2019	5 years ago
windeploy	Update with new Windows code signing certificate	5 years ago
zmq	…
README.md	…
bitcoin-cli.bash-completion	scripted-diff: Bump copyright of files changed in 2019	5 years ago
bitcoin-qt.pro	…
bitcoin-tx.bash-completion	…
bitcoind.bash-completion	scripted-diff: Bump copyright of files changed in 2019	5 years ago
filter-lcov.py	scripted-diff: Bump copyright headers	5 years ago
gitian-build.py	macos: Bump to xcode 11.3.1 and 10.15 SDK	4 years ago
install_db4.sh	scripted-diff: Add missed copyright headers	5 years ago
valgrind.supp	test: Make valgrind.supp work on aarch64	4 years ago

README.md

Repository Tools

Developer tools

Specific tools for developers working on this repository. Additional tools, including the github-merge.py script, are available in the maintainer-tools repository.

Verify-Commits

Tool to verify that every merge commit was signed by a developer using the github-merge.py script.

Linearize

Construct a linear, no-fork, best version of the blockchain.

A Linux bash script that will set up traffic control (tc) to limit the outgoing bandwidth for connections to the Bitcoin network. This means one can have an always-on bitcoind instance running, and another local bitcoind/bitcoin-qt instance which connects to this node and receives blocks from it.

Seeds

Utility to generate the pnSeed[] array that is compiled into the client.

Build Tools and Keys

Packaging

The Debian subfolder contains the copyright file.

All other packaging related files can be found in the bitcoin-core/packaging repository.

Test and Verify Tools

TestGen

Utilities to generate test vectors for the data-driven Bitcoin tests.

Verify Binaries

This script attempts to download and verify the signature file SHA256SUMS.asc from bitcoin.org.