Panagiotis Issaris panagiotis.issaris at mech.kuleuven.ac.be
Sat Oct 16 12:33:24 CEST 2004

MJ_RT wrote:

> Thanks for this.
> I have an question related to this project:
> I installed Rtai3.0 with mandrake-10 (on 2.4.25 kernel) I faced a poor
> real time response, but when use an Live-CD with Rtai I get hard real
> time response with same hardware, why ?

Several reasons are possible:
* Your kernel configuration:
    - is powermanagement disabled?
    - is DMA disabled?
* Software running on your Mandrake system might use the forbidden
"cli" instruction. F.e. the driver for your XServer might use that 

> Installed rtai latency = max=2 ms
> Live latency = 20 us ! 

Please consider submitting this data to the database.

With friendly regards,

Panagiotis Issaris
Katholieke Universiteit Leuven
Division Production Engineering,
Machine Design and Automation
Celestijnenlaan 300B              panagiotis.issaris at mech.kuleuven.ac.be
B-3001 Leuven Belgium                 http://www.mech.kuleuven.ac.be/pma

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