CCSv3.3 with OMAP-L137 performance problem

Adam said:

I had to declare more variable data in C code, after that I sow many errors: ofset too large. I changed Compiler Section C Variables Section (.far) to SDRAM in DSPBIOS GCT. My program started, but performance decrease 3 times

Access to external memory will decrease performance indeed.

Adam said:

My question is: does CCSv3.3 with EVM have any restriction in code generation?

No.

Adam said:

What is better in comercial version of CCSv3.3?

With the comercial version you can access any board, not just the EVM and get Service Releases updates.

Adam said:

Which math library is the fastest, I use fastmath67x.lib?

Usually the Fast RTS is indeed, faster. But as there is no Fart RTS for the C674x core, you could use the rts for the C674x core (rts6740.lib) and compare. For info about the C674x hibrid core please see:

 http://tiexpressdsp.com/index.php/-mv_option_to_use_with_the_C6747

Adam said:

Is it posible relocate more then 64kB variables in IRAM?

The total size of the DSP IRAM is 128KB, so you just have to make sure that everything that you need to put there fits in it.

Some related pages:

http://tiexpressdsp.com/index.php/C6000_Memory_models

http://tiexpressdsp.com/index.php/Code_Generation_Tools_FAQ#Q:_What.27s_the_benefit_of_using_near_calls_.2B_linker_trampolines_.v._all-far-calls.3F