Prevent constant rebuilds of rustc-main (and thus everything else)#114613
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This PR changes how LLVM is built. Consider updating src/bootstrap/download-ci-llvm-stamp. |
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lqd
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Aug 8, 2023
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We had the exact same issue with BOLT. I solved it with doing the BOLT modification on-the-fly in the |
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@bors r=lqd rollup |
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Dylan-DPC
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Prevent constant rebuilds of `rustc-main` (and thus everything else) PR rust-lang#114305 changed bootstrap to run `strip -g` on `librustc_driver.so` and `libllvm.so` on Linux when no debuginfo was requested. Unfortunately, that PR resulted in bootstrap always rebuilding everything starting from stage 1 `rustc-main` (including stage 1 libraries and tests) when invoking bootstrap multiple times. We noticed this because Ferrocene's CI times increased to between 2x and 3x total execution time, but the regression can also be reproduced locally by running `./x build library/sysroot --stage 1` twice. The explanation of the problem is in the code comments. r? `@lqd` cc `@ozkanonur`
matthiaskrgr
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Prevent constant rebuilds of `rustc-main` (and thus everything else) PR rust-lang#114305 changed bootstrap to run `strip -g` on `librustc_driver.so` and `libllvm.so` on Linux when no debuginfo was requested. Unfortunately, that PR resulted in bootstrap always rebuilding everything starting from stage 1 `rustc-main` (including stage 1 libraries and tests) when invoking bootstrap multiple times. We noticed this because Ferrocene's CI times increased to between 2x and 3x total execution time, but the regression can also be reproduced locally by running `./x build library/sysroot --stage 1` twice. The explanation of the problem is in the code comments. r? ``@lqd`` cc ``@ozkanonur``
bors
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…iaskrgr Rollup of 11 pull requests Successful merges: - rust-lang#106425 (Make ExitStatus implement Default) - rust-lang#113480 (add aarch64-unknown-teeos target) - rust-lang#113586 (Mention style for new syntax in tracking issue template) - rust-lang#113593 (CFI: Fix error compiling core with LLVM CFI enabled) - rust-lang#114612 (update llvm-wrapper include to silence deprecation warning) - rust-lang#114613 (Prevent constant rebuilds of `rustc-main` (and thus everything else)) - rust-lang#114615 (interpret: remove incomplete protection against invalid where clauses) - rust-lang#114628 (Allowing re-implementation of mir_drops_elaborated query) - rust-lang#114629 (tests: Uncomment now valid GAT code behind FIXME) - rust-lang#114630 (Migrate GUI colors test to original CSS color format) - rust-lang#114631 (add provisional cache test for new solver) r? `@ghost` `@rustbot` modify labels: rollup
GuillaumeGomez
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Aug 13, 2023
…acrum CI: use smaller machines in PR runs mingw-check job-linux-16c -> job-linux-4c ~job-linux-4c 20 min in auto job ~job-linux-16c 13 min in pr job with current pr regressed to almost 21 min, it's ok. mingw-check-tidy job-linux-16c -> job-linux-4c small enough, so reduce to minimal ~ job-linux-16c 3 min with current pr regressed to almost 5 min, it's ok. x86_64-gnu-tools job-linux-16c this is top job by time in PR, so don't touch it ~ job-linux-8c 1.30 hour in auto job ~ job-linux-16c 1 hour in pr job (affected by rust-lang#114613, actual time ~ 30 min) x86_64-gnu-llvm-15 job-linux-16c don't change too ~ job-linux-8c 1.30 hour in auto job ~ job-linux-16c 30 min in pr job Noticed while working on rust-lang#114621, so current time affected by always rebuilded docker images (but pr images always rebuilded before too, so nvm)
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PR #114305 changed bootstrap to run
strip -gonlibrustc_driver.soandlibllvm.soon Linux when no debuginfo was requested. Unfortunately, that PR resulted in bootstrap always rebuilding everything starting from stage 1rustc-main(including stage 1 libraries and tests) when invoking bootstrap multiple times.We noticed this because Ferrocene's CI times increased to between 2x and 3x total execution time, but the regression can also be reproduced locally by running
./x build library/sysroot --stage 1twice.The explanation of the problem is in the code comments.
r? @lqd
cc @ozkanonur