Change memory ordering in System wrapper example#106599
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bors merged 1 commit intorust-lang:masterfrom Apr 27, 2023
Merged
Change memory ordering in System wrapper example#106599bors merged 1 commit intorust-lang:masterfrom
bors merged 1 commit intorust-lang:masterfrom
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Currently, the `SeqCst` ordering is used, which seems unnecessary: + Even `Relaxed` ordering guarantees that all updates are atomic and are executed in total order + User code only reads atomic for monitoring purposes, no "happens-before" relationships with actual allocations and deallocations are needed for this If argumentation above is correct, I propose changing ordering to `Relaxed` to clarify that no synchronization is required here, and improve performance (if somebody copy-pastes this example into their code).
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r? @m-ou-se (rustbot has picked a reviewer for you, use r? to override) |
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Hey! It looks like you've submitted a new PR for the library teams! If this PR contains changes to any Examples of
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This looks correct to me. @bors r+ rollup |
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Change memory ordering in System wrapper example Currently, the `SeqCst` ordering is used, which seems unnecessary: + Even `Relaxed` ordering guarantees that all updates are atomic and are executed in total order + User code only reads atomic for monitoring purposes, no "happens-before" relationships with actual allocations and deallocations are needed for this If argumentation above is correct, I propose changing ordering to `Relaxed` to clarify that no synchronization is required here, and improve performance (if somebody copy-pastes this example into their code).
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#105745 (docs(std): clarify remove_dir_all errors) - rust-lang#106456 (Correct `std::prelude` comment) - rust-lang#106599 (Change memory ordering in System wrapper example) - rust-lang#110838 (More `Typefoldable`/`TypeVisitable` cleanups) - rust-lang#110851 (compiletest: emit assembly-output header in error) - rust-lang#110853 (compiletest: add bpf-linker assembly support) - rust-lang#110878 (Add `known-bug` tests for 4 unsound issues) - rust-lang#110886 (`DepGraph` cleanups) - rust-lang#110905 (Remove invalid value from scraped-examples.md) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Currently, the
SeqCstordering is used, which seems unnecessary:Relaxedordering guarantees that all updates are atomic and are executed in total orderIf argumentation above is correct, I propose changing ordering to
Relaxedto clarify that no synchronization is required here, and improve performance (if somebody copy-pastes this example into their code).