[etherlab-users] Working counter changed to 0/113

[pier]

On 09/04/14 16:52, Martin Troxler wrote:
> Hi Pier
>   >$ sudo cyclictest -t5 -p 99 -n 500
> gives better values than the -i 500 Option.
>
> Regards
> Martin
>
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> Thank You.
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Dear Martin


What you write works only with the realtime kernel... ?


We are using the Standard Ubuntu Kernel

The application runs under a Software Interrupt at  1.5 or 2 
milliseconds...

we measured that it  may have around 100 microseconds variation... ( Do 
you call it Jitter ? )

So this is ok for our control application....



Which are the problems that  we may have  with the standard kernel ?

Do you have a list of them ?

I  did not know that the realtime kernel it's a must for etherlab...


When sometimes ago I tried to use the Realtime kernel from the Ubuntu 
Repository

the size of the video screen was limited to 1024*768  and we cannot use 
the 1920*1080

screen resolution for the Graphic Application and Video that we have.

Also there was another restriction that now I do not recall now....


Do you think that the  : Working counter changed to 0/113

( that may happens once every 2 or 3 hours )

it's because we use the standard kernel ?


Is the realtime kernel the only solution ?



Thank you very much...


Best Regards

Pier


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