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Expand available_parallelism docs in anticipation of cgroup quota support #91057

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Nov 27, 2021
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Expand available_parallelism docs in anticipation of cgroup quota support #91057

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9 changes: 6 additions & 3 deletions library/std/src/thread/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1460,9 +1460,12 @@ fn _assert_sync_and_send() {
/// The purpose of this API is to provide an easy and portable way to query
/// the default amount of parallelism the program should use. Among other things it
/// does not expose information on NUMA regions, does not account for
/// differences in (co)processor capabilities, and will not modify the program's
/// global state in order to more accurately query the amount of available
/// parallelism.
/// differences in (co)processor capabilities or current system load,
/// and will not modify the program's global state in order to more accurately
/// query the amount of available parallelism.
///
/// Where both fixed steady-state and burst limits are available the steady-state
/// capacity will be used to ensure more predictable latencies.
///
/// Resource limits can be changed during the runtime of a program, therefore the value is
/// not cached and instead recomputed every time this function is called. It should not be
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