[EMAIL PROTECTED] (jl PAMART) wrote:
List of questions and suggestions
Relatively new to RTL people, I am developing an embedded control with
CAN,
distant access, and so on ...
I have 2 questions and 2 suggestions :
1/ is there a link between jitter and NMI IRQ ?
2/ is real time disk access possible ? (from SOUND example)
3/ mails together in a downloadable file
4/ RTL in general WEB sites
1/ RTL steal the masquable interruptions but what about he NMI IRQ ?
I don't know if there is a link with the jitter ? Does RTL stop
interruptions when the data is accessed on to hard disk?
2/ I have tested the sound example. It works fine on my Pentium
but it drops on my 386 because I've loaded it. So I think the user
"cat file.au > fifo" hasn't enough time to fill the fifo (sometimes).
I have fixed it by largely increasing the fifo. Can wa have a better
solution? Rt access hard drive?
STEPHANE ANCELOT <[EMAIL PROTECTED]> wrote
Are you sure the RT process works fine on your 386 ?
I had same problem with old architecture on which RT could not work
when loading machine and I was sure the machine was not RT. This seems
dependant on the timer implementation and hardware of your machine
The best way to test RT tasks is switching of hardware like LPT output
and
look what happens with scopemeter.
In RT app it is not possible to think , you must be sure !
==> Rt works fine! I have loaded my 386sx16 : the rt sound task, 2 dummies
counting tasks, ls / -r *, top, cat file.au > fifo !!!
My explanation for the drops : if the task with "cat file.au > fifo.au"
hasn't enough time to full the fifo
(user scheduler) the fifo become empty and rt task has nothong to do...
The only way to avoid drops : encrease the fifo?
3/ *this* support is very useful for brief questions. I suggest
an improvement could be made : put all the mails together in a
downloadable file on the RTL site (each month). For beginners
and the others ;) it will be a very usefull learning support.
This is already done thanks to mailing list
and mailing list archives
==> Can we load *all* the archives in one time?
4/ my opinion is we are in the very beginning of the rt times.
^^^^^^^^^^^^^^^^^
So, you are really new to RTOSes !!! OS9, pSos , ... exist for
more than 10 years
==> yes!! but relatively to the others ... and it is the beginning!
==>Regards
==> Jean Luc
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