[ECOS] R: [ECOS] Timing with longjmp

[Jonathan Larmour]

Michele Portolan wrote:
>>There is not currently a test to time this.  If you look at the
>>code in 'tm_basic.cxx', you can get a pretty good idea how to measure
>>such [small] quantities.  Basically, you need to capture the current
>>raw clock time (tm_basic uses 'HAL_CLOCK_READ()' for this).  Grab the
>>value before doing the longjump and then after you land in the new
>>location.  Then it's just simple math to figure out how long it took.
>>Again, tm_basic can show you how to convert the values to real time
>>(micro-seconds or whatever).
>>
>>Why are you bothering with such minutia?
> 
> I am making some peculiar timing measures on eCos to develop some idea, as I
> said on a precedent post. That is the reason why I am so interested in such
> little things: they could make the difference.

Watch out for HAL_CLOCK_READ wrapping BTW.

Jifl
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eCosCentric    http://www.eCosCentric.com/    The eCos and RedBoot experts
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