FreeEMS Issues - Firmware
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IDProjectCategoryView StatusDate SubmittedLast Update
0000127FirmwareScheduler (Inj/Ign)public2011-06-15 12:542014-02-18 23:06
ReporterFred 
Assigned ToFred 
PrioritynormalSeverityminorReproducibilityN/A
StatusassignedResolutionopen 
PlatformOSOS Version
Product Version 
Target Version0.2.1Fixed in Version 
FirmwareVersion
Issue TypeImprovement
Risk of Breakagehigh
Summary0000127: Split the code run time stuff into different parts
DescriptionSplit code run time into decoder, loop iteration max and number of iterations to do. Make decoder only loop through required number of entries. And therefore keep scheduling as tight as possible.
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(0000353)
Fred   
2011-10-06 20:30   
I just realised that this is actually slightly more complicated than I was modelling it. The worst case from input edge to output being triggered is this:

=WORSTOF(All other ISR runtimes and ATOMIC operations) + WORSTOF(primary decoder logic, secondary decoder logic) + (number of iterations * iteration runtime)

In other words, to do this right, we not only need to profile each and every decoder, and the scheduling code, we ALSO need to profile all other ISRs and ATOMIC blocks!

Make sure this is done correctly!