The following is a demonstration of the inttimes.d script,
Here we run it for a few seconds then hit Ctrl-C,
Tracing... Hit Ctrl-C to end.
^C
DEVICE TIME (ns)
ata0 22324
uhci1 45893
ata1 138559
uhci0 229226
i80420 1305617
rtls0 2540175
In the above output, we can see that the rtls0 driver spent 2540 us on the
CPU servicing interrupts, while ata0 spent only 22 us.