Expose thread/task priorities

[steveklabnik]

Issue by hoeppnertill
Wednesday Jul 23, 2014 at 18:09 GMT

For earlier discussion, see rust-lang/rust#15927

This issue was labelled with: A-libs in the Rust repository

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Trying to find an equivalent to the following C++ code,

struct sched_param p;
p.sched_priority = priority;
pthread_setschedparam(thread_, SCHED_FIFO, &p);

I failed to set the task priority using just exposed API.

brsons statement on IRC,

you can just call the pthread functions, but you'll be creating a thread that doesn't have the runtime setup properly

leaves little doubt that an exposed API for this actually is needed.

[jonhoo]

It would be good if this also included exposing sched_getaffinity and sched_setaffinity, as these could be useful for things like determining the number of CPUs.

[nagisa]

Windows

[steveklabnik]

https://news.ycombinator.com/item?id=15518320

[jq-rs]

I think this is a worthy improvement to have as some systems do use priorities heavily.

[rayascott-zz]

This would be extremely useful for situations where you’re wanting to shift low priority workloads off to queues that run in the background. #trifecta