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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2021-10-23 14:58:43 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-10-23 14:58:43 +0200 |
| commit | 1680359dad8f412a145c565ac84ea3711d5f97a0 (patch) | |
| tree | 16baed491843625ea1482a9da2cd0b419342fe54 | |
| parent | 74a0c492c190185552837e3d94baef4dbdacd230 (diff) | |
| parent | fd25491807f1a2d8314dca14dfb01f224d6df093 (diff) | |
| download | rust-1680359dad8f412a145c565ac84ea3711d5f97a0.tar.gz rust-1680359dad8f412a145c565ac84ea3711d5f97a0.zip | |
Rollup merge of #90198 - the8472:available-parallelism-runtime, r=joshtriplett
Add caveat about changing parallelism and function call overhead As discussed in https://github.com/rust-lang/rust/pull/89670#discussion_r728179584 r? ``@joshtriplett``
| -rw-r--r-- | library/std/src/thread/mod.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/library/std/src/thread/mod.rs b/library/std/src/thread/mod.rs index b2aa500a0fd..1a5cf5ab822 100644 --- a/library/std/src/thread/mod.rs +++ b/library/std/src/thread/mod.rs @@ -1449,6 +1449,10 @@ fn _assert_sync_and_send() { /// global state in order to more accurately query the amount of available /// parallelism. /// +/// 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 +/// called from hot code. +/// /// The value returned by this function should be considered a simplified /// approximation of the actual amount of parallelism available at any given /// time. To get a more detailed or precise overview of the amount of |