Added tracing spans for rustc invocations#15464
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weihanglo merged 1 commit intorust-lang:masterfrom Apr 29, 2025
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| ) | ||
| .entered(); | ||
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| let result = exec |
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Alternatively, trace all execs?
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Sure, I think that also works.
I put it outside since Executor seems a bit generic, but looking at the function signatures it is very much designed to run rustc.
I went ahead and moved it inside of the Executor in addc570 since I think its a bit nicer to use the #[instrument] macro :)
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| pub struct DefaultExecutor; | ||
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| impl Executor for DefaultExecutor { | ||
| #[instrument(name = "rustc", skip_all, fields(package = id.name().as_str(), process = cmd.to_string()))] |
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Just note that this is at INFO log level.
Our instruments are all like this, but I feel like we might want to downgrade to debug or trace. Not a blocker though.
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Update cargo 25 commits in 7918c7eb59614c39f1c4e27e99d557720976bdd7..056f5f4f3c100cb36b5e9aed2d20b9ea70aae295 2025-04-27 09:44:23 +0000 to 2025-05-09 14:54:18 +0000 - Revert "doc: Mention `XDG_DATA_HOME`" (rust-lang/cargo#15512) - docs: update version notice for deprecation removal (rust-lang/cargo#15511) - doc: Update instructions on using native-completions (rust-lang/cargo#15480) - feat(network): use Retry-After header for HTTP 429 responses (rust-lang/cargo#15463) - CI: Require schema job to pass (rust-lang/cargo#15504) - chore(config): migrate renovate config (rust-lang/cargo#15501) - Make cargo script ignore workspaces (rust-lang/cargo#15496) - fix(rustc): Don't panic on unknown bins (rust-lang/cargo#15497) - test: Remove unused nightly requirements (rust-lang/cargo#15498) - Add support for `-Zembed-metadata` (rust-lang/cargo#15378) - Fix tracking issue template link (rust-lang/cargo#15494) - Refactor artifact deps in FeatureResolver::deps (rust-lang/cargo#15492) - Improved error message for versions prefixed with `v` (rust-lang/cargo#15484) - chore: fix some typos in comment (rust-lang/cargo#15485) - fix: default to all targets when using `--edition` and ` --edition-idioms` in cargo fix (rust-lang/cargo#15192) - Update fingerprint footnote (rust-lang/cargo#15478) - feat(add): suggest similarly named features (rust-lang/cargo#15438) - In package-workspace, keep dev-dependencies if they have a version (rust-lang/cargo#15470) - docs: fix a typo in DependencyUI (rust-lang/cargo#15472) - fix grammar, and remove confusing example (rust-lang/cargo#15457) - Added tracing spans for rustc invocations (rust-lang/cargo#15464) - Trivial tweaks to 'target_short_hash' (rust-lang/cargo#15461) - chore(deps): update msrv (3 versions) to v1.84 (rust-lang/cargo#15456) - feat(add/install): check if given crate argument would be valid with inserted @ symbol (rust-lang/cargo#15441) - chang 1 tries to 1 try (rust-lang/cargo#15328) r? ghost
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What does this PR try to resolve?
While doing some investigation on the theoretical performance implications of #4282 (and #15010 by extension) I was profiling cargo with some experimental changes. (Still a work in progress)
But in the mean time, noticed that we do not have spans for rustc invocations. I think these would be useful when profiling
cargo build. (cargo build --timingexists but is more geared towards debugging a slow building project, not cargo itself)For reference below is an example before/after of a profile run of a dummy crate with a few random dependencies.
Before
After