On Tue, Apr 24, 2001 at 10:05:57AM -0400, Stewart Larsen wrote:
> Hello,
>
> I have a question about latency. If I'm running RTLinux on a FADS860 board, I'm
>wondering how long can I expect for the Linux kernel to disable the interrupts if
>It's interrupted for say keyboard input or traffic over the ethernet. I'm not even
>sure if I asked that the right way. If I'm depending on interrupts for my real time
>app, an interrupt from a non rtl process( keyboard, mouse, net, etc..) would disable
>interrupts for the RTL process while in it's ISR, is this correct? Or since the RTL
>has ths highest priority, would it's interrupt override the disable interrupt
>command from the lower priority process?
>
RTL prevents Linux from disabling interrupts. Instead Linux is given a
emulated interrupt controller in software. Interrupts for the RT system
cannot be delayed by Linux.
> --
> Stewart Larsen
>
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