Generalizes the v1.31 io_history pattern to two more metrics:
cpu_history and rss_history. Each Process tab row now shows
three sparklines:
IO-RATE (12 samples, full 78s of IO rate history)
CPU% (6 samples, last 39s of CPU usage)
RSS (6 samples, last 39s of memory)
The two new sparklines are 6 chars wide (vs 12 for IO-RATE) to
keep the panel within a 120-col terminal.
Implementation:
- Two new BTreeMap<u32, VecDeque<u64>> fields on App
- update_io_history() now updates all three maps in a single
3-pass sweep (reap, append, normalize) for all metrics
- Extracted private helpers push_sample() and normalize_history()
for the per-metric work; both operate on the map type
generically
- New render::sparkline_short() helper: renders the last
'width' samples of a history, padding with leading spaces
for short histories
Test count 121 -> 123 (+2):
- update_io_history_populates_cpu_and_rss_for_each_pid
(every PID gets cpu/rss entries, not just PIDs with non-zero
values)
- update_io_history_reaps_all_three_maps (phantom-PID reap
spans all three maps)
Redox stripped binary: 4,213,608 bytes (+12 KiB from v1.31).
Compile warnings: 55 (unchanged).
vasilito
bdec5061ef