pub fn tree_rss(
root: u32,
processes: &Snapshot,
) -> Result<(u64, usize), SamplingError>Expand description
Sum observed resident bytes for a root and its descendants, counting each leader once.
Missing roots yield zero; cycles cannot repeat an observation. This is a sampled sum of native RSS, not unique physical memory or proof that a process is still live.
ยงErrors
Returns an arithmetic overflow rather than wrapping the resident byte total.