Messages in this thread | | | Date | Wed, 22 Jun 2005 09:52:40 -0700 (PDT) | From | Daniel Walker <> | Subject | Re: ARM Linux Suitability for Real-time Application |
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On Wed, 22 Jun 2005, Russell King wrote:
> If you're just after some background process to run off interrupts with > minimal interrupt latency, the good news is that you don't have to modify > the kernel on ARM, and you certainly don't need any RT patches. > > If you use the FIQ, then your FIQ latency will be the time it takes the > CPU to enter your FIQ function. Since the kernel _never_ disables FIQs > in any way, FIQs have ultimate priority over everything else in the > system. >
Aren't FIQ's only on some ARM's ?
Daniel
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