Skip to content

backport: Merge bitcoin/bitcoin#27302, 27334, 27425 #6689

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
wants to merge 2 commits into
base: develop
Choose a base branch
from

Conversation

vijaydasmp
Copy link

Bitcoin Backports

fanquake and others added 2 commits May 25, 2025 18:14
eefe569 bugfix: Fix incorrect debug.log config file path (Ryan Ofsky)
3746f00 init: Error if ignored bitcoin.conf file is found (Ryan Ofsky)
398c371 lint: Fix lint-format-strings false positives when format specifiers have argument positions (Ryan Ofsky)

Pull request description:

  Show an error on startup if a bitcoin datadir that is being used contains a `bitcoin.conf` file that is ignored. There are two cases where this could happen:

  - One case reported in [bitcoin#27246 (comment)](bitcoin#27246 (comment)) happens when a `bitcoin.conf` file in the default datadir (e.g. `$HOME/.bitcoin/bitcoin.conf`) has a `datadir=/path` line that sets different datadir containing a second `bitcoin.conf` file. Currently the second `bitcoin.conf` file is ignored with no warning.

  - Another way this could happen is if a `-conf=` command line argument points to a configuration file with a `datadir=/path` line and that path contains a `bitcoin.conf` file, which is currently ignored.

  This change only adds an error message and doesn't change anything about way settings are applied. It also doesn't trigger errors if there are redundant `-datadir` or `-conf` settings pointing at the same configuration file, only if they are pointing at different files and one file is being ignored.

ACKs for top commit:
  pinheadmz:
    re-ACK eefe569
  willcl-ark:
    re-ACK eefe569
  TheCharlatan:
    ACK eefe569

Tree-SHA512: 939a98a4b271b5263d64a2df3054c56fcde94784edf6f010d78693a371c38aa03138ae9cebb026b6164bbd898d8fd0845a61a454fd996e328fd7bcf51c580c2b
…e ctor for `prevector`

bfb9291 util: implement prevector's move ctor & move assignment (Martin Leitner-Ankerl)
fffc86f test: CScriptCheck is used a lot in std::vector, make sure that's efficient (Martin Leitner-Ankerl)
81f6797 util: prevector's move ctor and move assignment is `noexcept` (Martin Leitner-Ankerl)
d380d28 bench: Add benchmark for prevector usage in std::vector (Martin Leitner-Ankerl)

Pull request description:

  `prevector`'s move assignment and move constructor were not `noexcept`, which makes it inefficient to use inside STL containers like `std::vector`. That's the case e.g. for `CScriptCheck`. This PR adds `noexcept`, and also implements the move assignment & ctor, which makes it quite a bit more efficient to use prevector in an std::vector.

  The PR also adds a benchmark which grows an `std::vector` by adding `prevector` objects to it.

  merge-base:
  |               ns/op |                op/s |    err% |          ins/op |          cyc/op |    IPC |         bra/op |   miss% |     total | benchmark
  |--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
  |            6,440.29 |          155,272.42 |    0.2% |       40,713.01 |       20,473.84 |  1.989 |       7,132.01 |    0.2% |      0.44 | `PrevectorFillVectorDirectNontrivial`
  |            3,213.19 |          311,217.35 |    0.7% |       35,373.01 |       10,214.07 |  3.463 |       6,945.00 |    0.2% |      0.43 | `PrevectorFillVectorDirectTrivial`
  |           34,749.70 |           28,777.23 |    0.1% |      364,396.05 |      110,521.94 |  3.297 |      78,568.37 |    0.1% |      0.43 | `PrevectorFillVectorIndirectNontrivial`
  |           32,535.05 |           30,736.09 |    0.4% |      353,823.31 |      103,464.53 |  3.420 |      79,871.80 |    0.2% |      0.40 | `PrevectorFillVectorIndirectTrivial`

  util: prevector's move ctor and move assignment is `noexcept`:
  |               ns/op |                op/s |    err% |          ins/op |          cyc/op |    IPC |         bra/op |   miss% |     total | benchmark
  |--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
  |            6,603.87 |          151,426.40 |    0.2% |       23,734.01 |       21,009.63 |  1.130 |       2,445.01 |    0.3% |      0.44 | `PrevectorFillVectorDirectNontrivial`
  |            1,980.93 |          504,813.15 |    0.1% |       13,784.00 |        6,304.32 |  2.186 |       2,258.00 |    0.3% |      0.44 | `PrevectorFillVectorDirectTrivial`
  |           19,110.54 |           52,327.15 |    0.1% |      139,816.41 |       51,987.72 |  2.689 |      28,512.18 |    0.1% |      0.43 | `PrevectorFillVectorIndirectNontrivial`
  |           12,334.37 |           81,074.27 |    0.7% |      125,655.12 |       39,253.58 |  3.201 |      27,854.46 |    0.2% |      0.44 | `PrevectorFillVectorIndirectTrivial`

  util: implement prevector's move ctor & move assignment
  |               ns/op |                op/s |    err% |          ins/op |          cyc/op |    IPC |         bra/op |   miss% |     total | benchmark
  |--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:----------
  |            5,262.66 |          190,018.01 |    0.2% |       20,157.01 |       16,745.26 |  1.204 |       2,445.01 |    0.3% |      0.44 | `PrevectorFillVectorDirectNontrivial`
  |            1,687.07 |          592,744.35 |    0.2% |       12,742.00 |        5,368.02 |  2.374 |       2,258.00 |    0.3% |      0.44 | `PrevectorFillVectorDirectTrivial`
  |           17,930.80 |           55,769.95 |    0.1% |      136,237.69 |       47,903.31 |  2.844 |      28,512.02 |    0.2% |      0.42 | `PrevectorFillVectorIndirectNontrivial`
  |           11,893.75 |           84,077.78 |    0.2% |      126,182.02 |       37,852.91 |  3.333 |      28,152.01 |    0.1% |      0.44 | `PrevectorFillVectorIndirectTrivial`

  As can be seen, mostly thanks to just `noexcept` the benchmark becomes about 2 times faster because `std::vector` can now use move operations instead of having to fall back to copy everything

  I had a look at how this change affects the other benchmarks, and they are all pretty much the same, the only noticable difference is `CCheckQueueSpeedPrevectorJob` goes from 364.56ns down to 346.21ns.

ACKs for top commit:
  achow101:
    ACK bfb9291
  jonatack:
    > Tested Approach ACK [bfb9291](bitcoin@bfb9291), ~ACK modulo re-verifying the implementation of the last commit.
  john-moffett:
    Approach ACK bfb9291
  theStack:
    Tested and light code-review ACK bfb9291

Tree-SHA512: 242995d7cb2f8ebfa73177aa690a505f189d91edeb8cea3e34a41ca507c8cb17c65fe2a4e196fdafc5c6e89b2b2222627bfc9f5c316517de0857b7b5e9c58225
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging this pull request may close these issues.

3 participants