Linux and priorities within kernel space

- M
- Martin
  
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posted
19 years ago

Thu, Jul 22, 2004 9:24 AM

I have maybe stupid question. From QNX I know every each driver acts as process having threads. Each thread has schedulinng scheme and it's own priority. How it's in Linux? I mean no user space, but kernel space. It looks for me like unpredictable bunch of mess. Can I somehow manage priorities even for the drivers? I'm using Denx's distribution. Or do I have to use some extensions? It looks like a problem with porting of already existing applications running on PC down to embedded slower CPUs. Specially streaming applications.

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- Arnand Gerbert
  
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posted
19 years ago

Thu, Jul 22, 2004 3:03 PM

Of course, you will need a real time operating system. The most known based on the linux kernel are RTlinux and linux RTAI.

Mart> I have maybe stupid question. From QNX I know every each driver acts

- M
- Michael Schnell
  
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posted
19 years ago

Fri, Jul 23, 2004 8:45 AM

Arnand Gerbert schrieb:

Not necessarily, IMHO.

If he has no _hard_ real time requirements he can improve the _soft_ realtime behavior by defining appropriate priorities for the different parts of the system.

-Michael