Re: interrupt latency ?

From: Jörn Engel (
Date: Mon Feb 10 2003 - 08:58:22 EST

On Fri, 7 February 2003 18:50:52 +0000, SA wrote:
> What latency should I expect for hardware interrupts under k2.4 / i386 ?
> ie how long should it take between the hardware signalling the interrupt and
> the interrupt handler being called?

Upper limit should be ~10,000 clock cycles.
Doing some tests on ppc, some rtos was able to react within 200
cycles, linux took 1000 or so. Add whatever time you handler (the c
code) takes.


When you close your hand, you own nothing. When you open it up, you
own the whole world.
-- Li Mu Bai in Tiger & Dragon
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