Add parallel-frontend-threads to bootstrap.toml and enable multi-threaded parallel compilation #146458
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
This PR modifies If appropriate, please update This PR modifies If appropriate, please update |
rustbot
added
S-waiting-on-review
|
r? @clubby789 rustbot has assigned @clubby789. Use |
This comment has been minimized.
This comment has been minimized.
Hayden602
force-pushed
the
bootstrap
branch
from
009b6b1 to
feed02f
Compare
This comment has been minimized.
This comment has been minimized.
Hayden602
force-pushed
the
bootstrap
branch
from
feed02f to
d4ce225
Compare
This comment has been minimized.
This comment has been minimized.
Hayden602
force-pushed
the
bootstrap
branch
2 times, most recently
from
ebc3e15 to
7c0230f
Compare
|
r? @SparrowLii @Kobzol |
Kobzol
reviewed
Sep 12, 2025
bootstrap.example.toml
Outdated
| # Trigger a `DebugBreak` after an internal compiler error during bootstrap on Windows | ||
| #rust.break-on-ice = true | ||
|
|
||
| # Set the number of threads used during rustc compilation |
There was a problem hiding this comment.
Suggested change
| # Set the number of threads used during rustc compilation | |
| # Set the number of threads for the compiler frontend used during rustc compilation (passed to `-Zthreads`). |
There was a problem hiding this comment.
This change also isn't limited to what is "used during rustc compilation", right? Tools, std, etc will get -Zthreads as well it seems?
lqd
reviewed
Sep 12, 2025
bootstrap.example.toml
Outdated
|
|
||
| # Set the number of threads used during rustc compilation | ||
| # The valid options are: | ||
| # 1 - Use non-parallel compilation |
There was a problem hiding this comment.
that's only in the frontend, so it's not "non-parallel compilation"
fmease
changed the title
Hayden602
force-pushed
the
bootstrap
branch
2 times, most recently
from
264a516 to
b5ebe58
Compare
|
This PR was rebased onto a different master commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
Kobzol
reviewed
Sep 15, 2025
Kobzol
reviewed
Sep 15, 2025
…aded parallel compilation
klensy
reviewed
Sep 16, 2025
bootstrap.example.toml
Outdated
Comment on lines
864
to
865
| # 0 - Set the number of threads according to the detected number of threads of the host system | ||
| # 0 - Set the number of threads according to the detected number of threads of the host system |
Hayden602
force-pushed
the
bootstrap
branch
from
f09635a to
929c933
Compare
|
Thank you! @bors r+ rollup |
bors
added
S-waiting-on-bors
bors
added a commit
that referenced
this pull request
Sep 17, 2025
Rollup of 7 pull requests Successful merges: - #146458 (Add parallel-frontend-threads to bootstrap.toml and enable multi-threaded parallel compilation) - #146485 (Remove unsized arg handling in `ArgAbiBuilderMethods::store_fn_arg` implementations) - #146536 (clean up several trait related UI tests) - #146598 (Make llvm_enzyme a regular cargo feature) - #146647 (Move `#[rustc_coherence_is_core]` to the `crate_level` file) - #146654 (Do not use `git -C dir`) - #146681 (Add space after brace in `Box<[T]>::new_uninit_slice` example) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer
added a commit
that referenced
this pull request
Sep 18, 2025
Rollup merge of #146458 - Hayden602:bootstrap, r=Kobzol Add parallel-frontend-threads to bootstrap.toml and enable multi-threaded parallel compilation Add the option to use the parallel compiler when building Rust code in bootstrap.
github-actions bot
pushed a commit
to model-checking/verify-rust-std
that referenced
this pull request
Oct 9, 2025
…zelmann Rollup of 7 pull requests Successful merges: - rust-lang#146458 (Add parallel-frontend-threads to bootstrap.toml and enable multi-threaded parallel compilation) - rust-lang#146485 (Remove unsized arg handling in `ArgAbiBuilderMethods::store_fn_arg` implementations) - rust-lang#146536 (clean up several trait related UI tests) - rust-lang#146598 (Make llvm_enzyme a regular cargo feature) - rust-lang#146647 (Move `#[rustc_coherence_is_core]` to the `crate_level` file) - rust-lang#146654 (Do not use `git -C dir`) - rust-lang#146681 (Add space after brace in `Box<[T]>::new_uninit_slice` example) r? `@ghost` `@rustbot` modify labels: rollup
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
9 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Add the option to use the parallel compiler when building Rust code in bootstrap.