Compiler optimisation turn on/off specific features

Hi Graham,

If you use default optimization then the code size is getting increased.

If code size is an issue, do not reduce the level of optimization. Instead, use the –ms switch to affect the optimization goal (performance versus code size).

Please refer to the following useful TI wikis.

http://processors.wiki.ti.com/index.php/C6000_Compiler:_Recommended_Compiler_Options

http://processors.wiki.ti.com/index.php/Optimization_Techniques_for_the_TI_C6000_Compiler

Hi Graham,

Graham says said:

is it possible to turn off these tasks one by one to eliminate each one as the cause of my problems?

Turning off the optimization features of level zero one by one may not be possible. However, on the whole, you can have the optimization completely off in CCS. ( Project properties--> CCS Build-->C6000 compiler-->Optimization level --> off.

OR

Instead of --opt_level=0, If you use the --opt_level=3, you can customize the features such as disabling the inline expansion using, --auto_inline=0

For more info on mixing up the custimization of optimizing features, please visit,

http://www.ti.com/lit/ug/spru281g/spru281g.pdf

Regards,

Shankari

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Hi

I do not get any errors or warnings about code size.

also turning optimisation for code size to level 3 has no effect on my problems

Thanks.

Graham

Hi Graham,

When I turn on optimization in the Project properties -> C6000 compiler -> optimisation menu my software behaves odd :)

Why do you want to improve further optimization than default ?

What kind of problem (odd behavior) are you facing ?

data captured on the spi is un-realistic, not sure yet if this is an spi problem or a data corruption problem or something else so didn't specify.

I need to use optimisation because at the moment the data transmission from capture on spi to buffer and onto emac module takes approximately 4 times too long, I am hoping that speeding everything up will provide more background time to packetize the data.