C6455 instructions per cycle

Ajay KADOLKAR

Dear All,

I am new to TI DSP and have just started working on C6455 DSP. I compiled my code on CCS V6.1.1 and profiled it.

I was mainly interested in : 'Functional unit utilization Ratio' : (number of instructions) / (number of Cycle)

With optimization level : -O3, use of intrinsic, #pragma MUST_ITERATE, loop unrolling etc.., i could achieve 'Functional unit utilization Ratio' as '2'. Now this value is too small considering 8 Functional units in C6455 DSP.

Can you guys suggest me how to improve performance by effective usage of available functional units ?

over 10 years ago

0 Sivaraj Kuppuraj over 10 years ago

TI__Mastermind 35645 points

Hi,

Thanks for your post.

There are optimization techniques for the c6000 compiler and DSP optimization workshop listed in the below links:

http://processors.wiki.ti.com/index.php/Optimization_Techniques_for_the_TI_C6000_Compiler?keyMatch=c6000 optimization&tisearch=Search-EN#Introduction_to_C6000_DSP_Optimization

http://processors.wiki.ti.com/index.php/TMS320C6000_DSP_Optimization_Workshop?keyMatch=c6000 optimization&tisearch=Search-EN#Workshop_Materials

There is a detailed application report below which provides strategies and examples for improving performance of C/C++ applications.

http://www.ti.com/lit/an/spra666/spra666.pdf

For tuning software pipelined loops with c6000 compiler, kindly check the below link:

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

Please look chapter 2, chapter 3 compiler optimization tutorial on the c6000 programmer's guide below:

http://www.ti.com/lit/ug/spru198k/spru198k.pdf

Thanks & regards,

Sivaraj K

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C6455 instructions per cycle