per-core/NUMA CPU and disk utilization plain-text grapher


This is a top-of-the-line logger of CPU usage patterns, designed for machines with ca. 50-300 total hardware threads (fewer works but results in a narrow graph, more requires a very wide terminal). Every per-tick sample is shown abusing Unicode characters to fit within a single line.

Disk usage is also shown in a similarly terse per-device way, as % utilization for reads and writes.

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