Hello everybody,
my Realtime application is now in a state where I can say it is working,
and its working very well so far :)
What I noticed during my tests is that sometimes my realtime tasks takes
very different times to complete, with a minimum of about 110 microseconds
and a maximum of about 350 microseconds.
This task is running at 1kHz, reading and writing 2x16 bits of IO from 2
DIO-Boards
and then executing some functions. The problem is, its is doing EXCACTLY the
same things as long as the IO-signals dont change ... so theoretically it
should
always have the same execution time ......
There is no other RT Task which could interrupt it, and no interrupts are
used in
my module.
I'm runnning my app on a diskless station, 500MHz Celeron, 128 MB RAM, Intel
EEPro,
RTAI 1.4 with Kernel 2.2.16. XWindows is running at 1024x768, and I am also
connected
with an X-Terminal on Windows NT.
So my question is: what could influence my Realtime task so that its
execution time differs
from time to time ? I noticed execution time going up when I have X running
and when
I am running applications from my X-Server on NT.
Any ideas anybody (and maybe a solution :) ?
Thanks in advance,
Marco Schwarz.
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