Is there a way to tell if too many HW interrupts are happening ?

is there a place to check the number of interrupts for the last minute ?

thanks !

/proc/interrupts is the place where it is recorded. You can have look at it using:

watch -n 60 "cat /proc/interrupts" -- this will refresh the values every 60 seconds

If you want to see it live then you can use:

watch -n 1 "cat /proc/interrupts" -- this will refresh the values every 1 second