bors e55c53c57e Auto merge of #97925 - the8472:cgroupv1, r=joshtriplett ...

Add cgroupv1 support to available_parallelism

Fixes #97549

My dev machine uses cgroup v2 so I was only able to test that code path. So the v1 code path is written only based on documentation. I could use some help testing that it works on a machine with cgroups v1:

```
$ x.py build --stage 1

# quota.rs
fn main() {
    println!("{:?}", std:🧵:available_parallelism());
}

# assuming stage1 is linked in rustup
$ rust +stage1 quota.rs

# spawn a new cgroup scope for the current user
$ sudo systemd-run -p CPUQuota="300%" --uid=$(id -u) -tdS

# should print Ok(3)
$ ./quota
```

If it doesn't work as expected an strace, the contents of `/proc/self/cgroups` and the structure of `/sys/fs/cgroups` would help.

2022-07-23 13:33:56 +00:00

..

benches

…

primitive_docs

…

src

Auto merge of #97925 - the8472:cgroupv1, r=joshtriplett

2022-07-23 13:33:56 +00:00

tests

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build.rs

Library changes for Apple WatchOS

2022-07-20 08:57:36 +01:00

Cargo.toml

library/std: Bump compiler_builtins

2022-05-26 21:11:16 +02:00