got problem with timer interrupt
wilbur.chan
wilbur512 at gmail.com
Tue Jan 19 02:28:54 EST 2010
A timer has been added into my system, and it is used to generate
continuous interrupt every 1 ms.
This hw is register by request_irq(19, handler_1ms)
Howeve I found that , it is longer than 1 ms between two interrupts,
for I used get_cycles everytime we entered
do_irq :
if(irq==19)
{
delta = get_cycle()-old;
}
but to find that delta is always larger than cpu cycles between 1ms.
Does anyone know why this happened?
regards,
More information about the Linuxppc-dev
mailing list