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scx/rust/scx_utils
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David Vernet 12e0586fe9
cpumask: Update cpumask fmt function 
The cpumask print formatter doesn't look great in its current form, which uses
the BitVec formatter under the hood:

[INFO] NUMA[00 32:<[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]>]
[INFO]         DOM[00] 32:<[1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0]>
[INFO]         DOM[01] 32:<[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1]>

Let's just iterate over the mask and manually format the string using the
binary formatter over the slice of u64's, which renders like this:

[INFO] NUMA[00] 0b11111111111111111111111111111111]
[INFO]         DOM[00] 0b00000000111111110000000011111111
[INFO]         DOM[01] 0b11111111000000001111111100000000

Signed-off-by: David Vernet <void@manifault.com>
2024-03-08 15:11:17 -06:00
..
src cpumask: Update cpumask fmt function 2024-03-08 15:11:17 -06:00
.gitignore rustu: Import scx_rusty and scx_layered from kernel tree 2023-11-30 13:13:41 -10:00
bindings.h rust/scx_utils: Add user_exit_info support 2024-01-31 10:54:15 -10:00
bpf_h scx_utils: Add mod bpf_h 2023-11-28 15:20:01 -10:00
build.rs scx_utils: introduce Builder() 2024-02-28 17:49:44 +01:00
Cargo.toml scx_utils: introduce Builder() 2024-02-28 17:49:44 +01:00
LICENSE rust: clarify license and include text 2023-12-12 13:02:13 -08:00
meson.build Add libbpf as a submodule 2024-03-01 12:39:35 -08:00
README.md scx_utils: Documentation and other minor updates 2023-12-02 23:56:36 -10:00

README.md

Utility collection for sched_ext schedulers

sched_ext is a Linux kernel feature which enables implementing kernel thread schedulers in BPF and dynamically loading them.

Thie crate is a collection of utilities for sched_ext scheduler implementations which use Rust for userspace component. This enables implementing hot paths in BPF while offloading colder and more complex operations to userspace Rust code which can be significantly more convenient and powerful.

Please see documentation for more details.