Having upgraded to the latest TI kernel, I noticed a large number of timer interrupts. From itop:
INT NAME RATE MAX
57 [ 100000.ethernet] 6 Ints/s (max: 7)
58 [ 100000.ethernet] 6 Ints/s (max: 6)
84 [ _timer] 10203 Ints/s (max: 10230)
Seem to get a consistent 10KHz set of interrupts from _timer (on an idle system). Booting with the
3.8-bone latest kernel does not show this behaviour. Also rather confusingly this behaviour seems
to be non consistent, in that I have a pretty much identical bone running the TI kernel that does not
seem to have the same problem:
INT NAME RATE MAX
57 [ 100000.ethernet] 8 Ints/s (max: 8)
58 [ 100000.ethernet] 6 Ints/s (max: 6)
84 [ _timer] 35 Ints/s (max: 37)
Anyone any idea what is going on here ?
Cheers Steve.