[ECOS] interrupt latency (ARM7)
Jonathan Larmour
jlarmour@redhat.com
Tue Oct 16 14:42:00 GMT 2001
Ilko Iliev wrote:
>
> I have custom board with ARM7 (AT91M55800) at 33Mhz system CPU clock.
>
> I measured ISR handling latency time 48-90 mkSec.
>
> It is normal???
Maybe; it depends on a whole lot of things like speed of RAM, speed of ROM
(if you're running from ROM) and the settings of quite a few options in the
eCos configuration. I can guarantee it could be reduced by using different
configuration options; the default configuration is not the fastest!
Jifl
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