[sdiy] Small MCU MIPS, DMIPS?

[Scott Gravenhorst]

karl dalen <dalenkarl at yahoo.se> wrote:
>MIPS are a valuable sales tool for the sales people, engineers
>however knows its just sales blabbering yet its still used?
>
>MIPS = ????
>Misleading indicator of processor speed 
>Meaningless indicator of processor speed 
>Marketing indicator of processor speed 
>Managements impression of processor speed
>
>Now...?...huumm.... i have forgot what i was supposed to ask?
>It was something about dsPIC STM32 and real figures and
>something..else...?! Ah!!, yes interrupt....something!?
>wait states, flash not able to run at 72Mhz....or what,
>else, if! Ah, yes dsPIC being faster then STM32 due to
>dual port RAM for routines using DMA....or so when...if?!

I disagree with the premise that it's useless, meaningless or just
marketing blather.

Why don't YOU tell us exactly how we should measure it?  

The actual application is most important since it may or may not be able to
use the special features provided.  Application X on device A may run
faster than on device B, and application Y might run faster on device B
than on A.  So which device is faster?  That question is of little value. 
So do your research, read the datasheets of the devices you are considering
and understand how the features will affect the application you want to
implement.  That will tell you more than MIPS - for YOUR application. 
However, generally, MIPS is a basic starting point for a very general
comparison of the devices you would consider.  I don't believe that any
engineer would consider MIPS rating the ultimate answer, when they need a
device, they will get/buy samples and benchmark themselves.  But MIPS will
help them choose a few from the many.

>Never mind.

Perhaps.

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- FPGA MIDI Synthesizer Information: home1.gte.net/res0658s/FPGA_synth/
-- FatMan: home1.gte.net/res0658s/fatman/
-- NonFatMan: home1.gte.net/res0658s/electronics/
-- When the going gets tough, the tough use the command line.