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Ava Chow 891e4bf374
Merge bitcoin/bitcoin#28339: validation: improve performance of CheckBlockIndex 
5bc2077e8f validation: allow to specify frequency for -checkblockindex (Martin Zumsande)
d5a631b959 validation: improve performance of CheckBlockIndex (Martin Zumsande)
32c80413fd bench: add benchmark for checkblockindex (Martin Zumsande)

Pull request description:

  `CheckBlockIndex() ` are consistency checks that are currently enabled by default on regtest.

  The function is rather slow, which is annoying if you
  * attempt to run it on other networks, especially if not fully synced
  * want to generate a long chain on regtest and see block generation slow down because you forgot to disable `-checkblockindex` or don't know it existed.

  One reason why it's slow is that in order to be able to traverse the block tree depth-first from genesis, it inserts pointers to all block indices into a `std::multimap` - for which inserts and lookups become slow once there are hundred thousands of entries.
  However, typically the block index is mostly chain-like with just a few forks so a multimap isn't really needed for the most part. This PR suggests to store the block indices of the chain ending in the best header in a vector instead, and store only the rest of the indices in a multimap. This does not change the actual consistency checks that are being performed for each index, just the way the block index tree is stored and traversed.

  This adds a bit of complication to make sure each block is visited (note that there are asserts that check it), making sure that the two containers are traversed correctly, but it speeds up the function considerably:

  On master, a single invocation of `CheckBlockIndex` takes ~1.4s on mainnet for me (4.9s on testnet which has >2.4 million blocks).
  With this branch, the runtime goes down to ~0.27s (0.85s on testnet).This is a speedup by a factor ~5.

ACKs for top commit:
  achow101:
    ACK 5bc2077e8f
  furszy:
    ACK 5bc2077e8f
  ryanofsky:
    Code review ACK 5bc2077e8f. Just added suggested assert and simplification since last review

Tree-SHA512: 6b9c3e3e5069d6152b45a09040f962380d114851ff0f9ff1771cf8cad7bb4fa0ba25cd787ceaa3dfa5241fb249748e2ee6987af0ccb24b786a5301b2836f8487
2024-06-11 16:41:44 -04:00
.github ci: Use relative paths in win64-native CI job consistently 2024-06-07 10:47:36 +01:00
.tx qt: Bump Transifex slug for 27.x 2024-02-07 09:24:32 +00:00
build-aux/m4 build: no-longer allow GCC-10 in C++20 check 2024-06-05 10:47:52 +01:00
build_msvc Merge bitcoin/bitcoin#29494: build: Assume HAVE_CONFIG_H, Add IWYU pragma keep to bitcoin-config.h includes 2024-05-07 14:14:03 -04:00
ci ci: update deps for macOS cross build 2024-06-10 13:15:23 +01:00
contrib refactor: rename (macho) ld64 to lld 2024-06-10 13:20:54 +01:00
depends refactor: rename (macho) ld64 to lld 2024-06-10 13:20:54 +01:00
doc Merge bitcoin/bitcoin#30257: build: Remove --enable-gprof 2024-06-10 12:01:19 +01:00
share contrib: rpcauth.py - Add new option (-j/--json) to output text in json format 2024-04-25 08:32:28 -05:00
src Merge bitcoin/bitcoin#28339: validation: improve performance of CheckBlockIndex 2024-06-11 16:41:44 -04:00
test Merge bitcoin/bitcoin#29521: cli: Detect port errors in rpcconnect and rpcport 2024-06-11 15:55:18 -04:00
.cirrus.yml ci: Skip git install if it is already installed 2024-02-16 16:06:45 +01:00
.editorconfig ci: Drop AppVeyor CI integration 2021-09-07 06:12:53 +03:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore Merge bitcoin/bitcoin#29733: build, macos: Drop unused osx_volname target 2024-04-02 14:57:22 +01:00
.python-version Bump .python-version from 3.9.17 to 3.9.18 2023-10-24 18:51:24 +02:00
.style.yapf Update .style.yapf 2023-06-01 23:35:10 +05:30
autogen.sh build: make sure we can overwrite config.{guess,sub} 2023-06-13 14:58:43 +02:00
configure.ac Merge bitcoin/bitcoin#30257: build: Remove --enable-gprof 2024-06-10 12:01:19 +01:00
CONTRIBUTING.md doc: Correct pull request prefix for scripts and tools 2024-05-22 09:59:58 +02:00
COPYING doc: upgrade Bitcoin Core license to 2024 2024-01-10 16:29:01 -06:00
INSTALL.md doc: Added hyperlink for doc/build 2021-09-09 19:53:12 +05:30
Makefile.am Merge bitcoin/bitcoin#29739: build: swap cctools otool for llvm-objdump 2024-05-11 18:34:42 +08:00
README.md doc: Explain Bitcoin Core in README.md 2022-05-10 07:49:09 +02:00
SECURITY.md Update security.md contact for achow101 2023-12-14 18:14:54 -05:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.

What is Bitcoin Core?

Bitcoin Core connects to the Bitcoin peer-to-peer network to download and fully validate blocks and transactions. It also includes a wallet and graphical user interface, which can be optionally built.

Further information about Bitcoin Core is available in the doc folder.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but it is not guaranteed to be completely stable. Tags are created regularly from release branches to indicate new official, stable release versions of Bitcoin Core.

The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The CI (Continuous Integration) systems make sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.