Question 1

How to set thread priority in Rust for cross-platform applications?

Accepted Answer

Use thread-priority's ThreadPriority enum with functions like set_current_thread_priority or integrate with ThreadBuilderExt for new threads, as shown in the minimal cross-platform examples. This abstracts OS differences, but ensure to handle Result types for errors.

Question 2

thread-priority vs std::thread: which one should I use for concurrency?

Accepted Answer

std::thread provides basic threading without priority control, while thread-priority adds cross-platform scheduling management. Choose thread-priority if you need fine-grained priorities, but stick with std::thread for simpler tasks without such requirements.

Question 3

How to pin a thread to a CPU core using thread-priority?

Accepted Answer

On Windows, use the set_thread_ideal_processor function, but note this is platform-specific and not available on all OSes, as indicated in the README examples. For other platforms, you may need to rely on native APIs or additional libraries.

Question 4

Is thread-priority compatible with async runtimes like Tokio?

Accepted Answer

thread-priority controls OS thread priorities, which might not integrate directly with async runtimes that manage their own scheduling. You can set priorities on threads spawned by the runtime, but this requires careful handling and may not align with async abstractions.

Question 5

What are the performance implications of using thread-priority?

Accepted Answer

The library abstracts OS APIs with minimal overhead, but improper priority settings can lead to starvation or poor system performance. Always test on target platforms, as scheduling behavior varies, and refer to OS documentation for best practices.

Question 6

How to handle errors when setting thread priority fails?

Accepted Answer

Functions return Result types, so use pattern matching or unwrap cautiously. The ThreadBuilderExt examples show checking results, and spawn_careless is provided for cases where errors can be ignored, but logging failures is recommended for debugging.

thread-priority

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