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Re: interrupt latency (ARM7)
- To: Ilko Iliev <iliev at caretec dot at>
- Subject: Re: [ECOS] interrupt latency (ARM7)
- From: Jonathan Larmour <jlarmour at redhat dot com>
- Date: Tue, 16 Oct 2001 22:41:58 +0100
- Cc: ecos-discuss at sources dot redhat dot com
- Organization: Red Hat UK Ltd.
- References: <5.1.0.14.2.20011016154349.05fca978@mbox>
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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