Use the full help text and not the one line description
Implement rate conversion for PM_SEM_COUNTER values

Some metrics make more sense to be plotted divided by time
(kernel.cpu.all.* for example)
Values of counter semantics metrics (PM_SEM_COUNTER) are commonly
reported after rate conversion (requires successive samples, and
the value plotted is the value-delta divided by the time-delta), so
that MB/sec, or utilizations, are reported instead of raw values.

This can be disabled with the --raw option