Daniel Marian wrote:

> Hello,
>   As part of our RTLinux project assignment for summer vacation. I have to study 
>whether RTLinux has the same
> functionality for timers as the Linux kernel.
>
> For example does RTLinux have dynamic timers which are
> existent in Linux kernel.Does RTLinux have a bottom
> Half when a timer interrupt arrives.
>

No bottom halves in RTLinux (not in the 3.0 anyway)

>
> How does RTLinux update the jiffies and other related
> variables.

The normal linux timer interrupt is called from rtlinux whenever it is necessary 
(after a jiffy has passed)
This handler will then take care of what normally happens when the linux timer goes 
off ... eg like increasing
the jiffies variable.

>
>
> Please help/direct me to some material on the net
> which deals with all the above mentioned areas.
>
> thanks in advance
> daniel.

We recently created a RTLinux version for StrongARM (can be found at  
http://www.imec.be/rtlinux )
The source code for ARM contains a lot of comment (more than for the other GPL 
versions anyway).
Have a look at the patch ... and mail me if you want more info on them ...

Vincent Nollet

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