ah yeah, this does it:
```
$ raku -e 'my @l=run("dmesg", :out).out.lines; sleep 100'
[SCHEDULER 7244] Per-core utilization (approx): 1.5873224752337234%
[SCHEDULER 7244] Per-core utilization (approx): 1.5819907329549272%
[SCHEDULER 7244] Per-core utilization (approx): 1.6189916960817154%
[SCHEDULER 7244] Per-core utilization (approx): 1.6057903124550614%
[SCHEDULER 7244] Per-core utilization (approx): 1.5903367529978973%
[SCHEDULER 7244] Per-core utilization (approx): 6.311155901255194%
[SCHEDULER 7244] Per-core utilization (approx): 6.244121108705725%