realtime problem

[Poul-Henning Kamp]

In message <20030409114957.GN83126 at cicely9.cicely.de>, Bernd Walter writes:

>I need a realtime behavour in the (-current) kernel with 1ms
>resolution and a presision of 500us.

You are in trouble.

>I thought about these two ways:
>- use timeout(9), but it seems that on i386 we only have a
>  resolution of 10ms.
>  And I don't know of what presision quality I can expect.
>  Can the resolution changed to 1ms as we have on alpha?

You can change this by changing the "hz" of the kernel.

I belive this can be done from either the loader or the kernel
config file.

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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