Any RTOS to report latencies?

Jim Granville wrote:
> Stargazer wrote:
> 
>> Greetings,
>>
>> I am wondering are there RTOSes that document interrupt and task
>> switching latencies on supported platforms and provide with tools to
>> validate that. I read some advertising hype from OS vendors on how
>> small their latencies are, but there were no numbers. There were also
>> several independent studies that got to numbers, which OS salesmen
>> probably prayed would have never been published :-)
>>
>> So does anybody knows RTOS(es) that do document and validate the
>> latencies on supported platforms?
> 
> I came across this recently
> http://www.innovasic.com/
> 
> Their Fido1100 seems to have a real-time focus, and they
> quote system jitter times, and MAX's, so you might get
> into there.
> 

Have you any ideas how good these devices are?  They certainly sound 
interesting.

On Mon, 10 Sep 2007 15:39:54 GMT, "FreeRTOS.org" <noemail@address.com>
wrote:

>I receive questionnaires occasionally from researchers, magazines, etc with 
>reference to FreeRTOS.org.  My favourite question is "What is the context 
>switch time?". 

Mine too.


>you want me to measure?"  The answer came back "The time to switch from one 
>task to another".  I could not resist "On a PIC18 or a Pentium?" - to which 
>they replied "whatever the average is".  Enough said.

I once gave the numbers for a "imaginary" 1GHz ARM7  which impressed
them :-))

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42Bastian
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