pub fn sample_peak_rss(label: &'static str)Expand description
Convenience wrapper: sample the process’s current resident set
(not peak) via task_info on macOS / /proc/self/statm on Linux and
push it into the probe event buffer under the given label.
Using current RSS (not getrusage.ru_maxrss) is essential so that
allocator purges are visible — peak RSS only moves up. Name kept as
sample_peak_rss for backwards compatibility with existing
checkpoint labels; semantically it is “sample current”.