Reply by John R. Strohm December 18, 20032003-12-18
"Peter Mueller" <peter.o.mueller@gmx.de> wrote in message
news:ae3e5034.0312171123.1fc583e5@posting.google.com...
> "John R. Strohm" <strohm@airmail.net> wrote in message > > > > How much money do you want to spend? > > > > What kind of answers do you need? > > Hi John, > > I want to understand
(A) > - if my design meets the requirements: speed, response time. (B) > - find potential for tuning (C) > - better understand where the system spends its time OK, going on the assumption that this is a simple application on a single microcontroller... Debugging is usually simpler if you start with known working code in an easy debug environment. If your code doesn't work in a benign workstation environment, it won't work on the embedded platform, either. So build a sim environment on a Linux box, and run gprof to profile it. You WON'T see time spent in library routines, just time spent in your code. That gets you a good start on item (C), and knowledge of (C) is the first thing that feeds (B). Tuning something that in untuned form takes 1% of your total runtime isn't going to buy you very much. Unfortunately, for (A), beyond the usual analyses about how many events per second you have to process, and how much computation is involved per event, and how much data has to move through which pieces of the system per event and per second, there isn't a good uniform methodology for tackling this kind of problem.
Reply by Peter Mueller December 17, 20032003-12-17
"John R. Strohm" <strohm@airmail.net> wrote in message 
> > How much money do you want to spend? > > What kind of answers do you need?
Hi John, I want to understand - if my design meets the requirements: speed, response time. - find potential for tuning - better understand where the system spends its time Peter
Reply by John R. Strohm December 14, 20032003-12-14
"Peter Mueller" <peter.o.mueller@gmx.de> wrote in message
news:1g5yrw8.um280q129uhk0N%peter.o.mueller@gmx.de...
> Hi all, > > I just finished an application for a msp430. Unfortunately I need 2 > redesigns to finally reach the required performance. The RMA tools I > know do not support things like "one task triggers the execution of > another task" or "bursts of execution in a cyclic manner (e.g. serial > interrupts). > > Does anyone knows a good tool to model a real time system to get > performance figures early during design?
How much money do you want to spend? What kind of answers do you need?
Reply by Peter Mueller December 14, 20032003-12-14
Hi all,

I just finished an application for a msp430. Unfortunately I need 2
redesigns to finally reach the required performance. The RMA tools I
know do not support things like "one task triggers the execution of
another task" or "bursts of execution in a cyclic manner (e.g. serial
interrupts).

Does anyone knows a good tool to model a real time system to get
performance figures early during design?

Thanks a lot,
Peter