On Sun, Sep 05, 1999 at 11:28:13AM +0200, Peter Wurmsdobler wrote:
> Hi,
>
> > RTL on Alpha would offer more performance than any DSP. I hope
> > that some people will do the job of porting RTL to Alpha.
> That is what I am suspecting. Thus, Nicholas McGuire, [EMAIL PROTECTED],
> and me would be interested in doing the port. However, the people
> at the austrian company got confused when I was talking about
> the interrupt handler which is different for rtl. They think that
> rtl wants to change the CPUs hardware interrupt handling to make
> linux real time compliant.
> As far as I understand rtl, two basic schemes are implemented:
> Introduce two classes of interrupts, one treated in real time by
> the interrupt handler ( piece of software called by the CPU if an
> interrupt is issued ), and a second one simulating interrupts to
> the normal Linux kernel. The second idea is two classes of processes,
> scheduled with different policies. Both together introduce a layer
> between the CPU and the OS being capable of doing signal processing,
> and if there is some time left, yield the CPU to a UNIX workstation.
> Hence, there should be no problem to port rtl to alpha AXP. If I
> am wrong, correct me, please, if not, I will forward the informations
> to the austrian dealer of Alpha based workstations.
AFAIK you are correct. You create your own scheduler below Linux
without replacing the Linux scheduler. Things should be a lot
easier for an expert since the interrupt and timer hardware
on Alpha boards seem to have a more cleaner design than on PC boards
(perhaps for compatibility reasons).
Kai
--
Kai P. Mueller
Control Department (Regelungstechnik) | Phone [+49] (531) 391-3835
Technical University Braunschweig | Fax [+49] (531) 391-5194
D-38092 Braunschweig | Email [EMAIL PROTECTED]
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