Module collect 

2026-09-26: The I/O half of the hardware-state collector: run nvidia-smi, read procfs and sysfs, and hand the text to super::parse, which does the interpreting.

A tool that is missing, fails, exits non-zero or prints nothing, and a file that cannot be read, leave the fields they would have filled at their defaults, with one exception: a compute-apps query that gives no output is recorded as an empty list when nvidia-smi --list-gpus answers. super::policy decides what a missing reading means.

collect blocks: it runs subprocesses, and std::process has no timeout. The bench executor calls it through spawn_blocking (executor.rs).

Owner: bench hardware. Invariants:

• collect returns a HardwareState on every path; it has no error type.
• sources names only sources that answered.

Functions

collect

2026-09-26: Capture the local box’s state. Each source fills only its own fields, and one that does not answer leaves them at their defaults, except the compute-apps list (see the module doc).