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Re: Realtime OS & wearable (QNX anyone ?)

From: Eric Laforest <>
Date: Mon, 12 Mar 2001 06:20:18 -0500

On Mon, Mar 12, 2001 at 01:07:13AM -0800, Stephen Hindle thus spake:
> 
> 
> Ok...This time I _did_ search the list archives :-)
> 
>   Has anyone tried QNX on their wearable?  or RTLinux?
> or any of the other 'realtime'/'embedded' OS's around?
> (pSoS anyone ? :-) )  I'd think they'd be a natural
> for a wearable...

Cost is a problem...most commercial RTOS are too expensive.
Being closed-source is also a major problem.

I've used RT-Linux for work before...it's excellent.

> 
> Its small, fast, doesn't have the IDE 'hiccups' 
> non-rt kernels like Linux have (ie MP3's don't skip
> - no matter how many yer playing - I stopped 
> counting at 10)

This is due to non-DMA disk access on IDE systems
which causes the CPU to become I/O-bound at high transfer rates.

Eric LaForest

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