Re: System response time for Linux

From: Alan Cox (
Date: Thu May 11 2000 - 06:06:48 EST

> this is much too harsh; with the user-level app running RT, and no stupid
> misconfigurations (IDE in PIO, other RT tasks), there won't be "occasional"
> long delays.

The odd half second here or there. A simple example is handling a page
fault or an I/O when you are doing a memory allocation. Your RT task can then
get stuck at the back of a queue of pending I/O operations.

We don't try to be 'seriously realtime' in paticular we don't deal with
priority inversion and kernel pre-emption. If it hurts when you miss
deadlines look at RtLinux

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