There are different Compilers for Starterware and Linux. When I set the
flag -mfpu=vfpv3 in Linux, and Rebuild the project I don't get a different
result. What I can do in eclipse under Linux is to set the optimizations
level. What I did yesterday was to change my programm to the following:
double x = 3.1415;
while(1)
{
toggle_gpio();
for(i=0; i<35000; i++)
{
x = sqrt(x);
}
}
For Starterware I measured 85,5 Hz and for Linux 19,7 Hz. In both i turned
off the optimization. This result makes a bit more sense but actually both
should be the same. The problem with my other programm was probably, that
the Compiler on Linux saw that I wanted to do the same operation
sqrt(3.1415) 35000 times and did some kind of optimization even though I
told him not to optimize. In my new program he gets a new result after each
iteration of the loop.
But I think I will finish this testing now. In most of my tests Starterware
got much better results and moreover you don't have the Jitter like when
you use Linux.
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