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Hint mechanism to require more "slots" to build a crate #8405

Closed as not planned
Closed as not planned
Hint mechanism to require more "slots" to build a crate#8405
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A-build-executionArea: anything dealing with executing the compilerA-jobserverArea: jobserver, concurrency, parallelismC-feature-requestCategory: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`

Description

@joshtriplett
joshtriplett
opened on Jun 24, 2020

When building rust-lang/rust in parallel, I found that rustc_middle would take the vast majority of the compilation time and memory. I repeatedly ran into the OOM-killer because cargo would start up three more things building in parallel, and rustc_middle was already using 5-6GB of my 8GB of RAM. I'd like to be able to somehow hint to Cargo that it should treat rustc_middle as particularly heavy to build, and that it should count as multiple "slots" in the 4 parallel jobs Cargo would allow to run. That would have allowed me to successfully build within 8GB of RAM.

Activity

  1. joshtriplett
    added
    C-feature-requestCategory: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`
    on Jun 24, 2020
  2. ehuss
    added
    A-jobserverArea: jobserver, concurrency, parallelism
    on Jun 25, 2020

  3. luser commented on Feb 9, 2021

    @luser
    luser
    on Feb 9, 2021
    Contributor

    Possibly a duplicate of #7437?

  4. epage commented on Nov 2, 2023

    @epage
    epage
    on Nov 2, 2023
    Contributor

    #7437 is about package prioritization while this is about resource utilization.

  5. epage
    added
    A-build-executionArea: anything dealing with executing the compiler
    on Nov 2, 2023

  6. epage commented on Nov 3, 2023

    @epage
    epage
    on Nov 3, 2023
    Contributor

    #12912 discusses the OOM problem and is exploring smaller and bigger solutions. To keep the conversation in one place, I'm closing this.

  7. epage
    closed this as not plannedon Nov 3, 2023
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