Choosing compiler optimiztions through the CCSv4 gui

Len Koss

Other Parts Discussed in Thread: OMAP3530, TMS320C6416

Hello,

I'm currently using CCS Ver 4.1.2 with the C6000 compiler being used for code development on the C64x+ core in the OMAP3530. How do I set the compiler options on CCS Ver 4.1.2 so that I get compiler optimization equivalent to the following CCS Ver 3.3 settings:

Opt Level: 03

Opt Speed vs. Size: Speed Most critical (no -ms)

I used the following setting on CCS Ver 4.1.2

Optimize for speed (--opt_for_speed, -mf) 5

but didn't come close to the performance achieved with CCS Ver 3.3. I was expecting to do as good if not better then the performance achieved with the old tool and the older C64x core in the TMS320C6416. What am I missing? What other compiler optimization or memory model switches do i need to set on the newer tool?

Thanks,

Len

over 15 years ago

0 Ki over 15 years ago

TI__Guru**** 480771 points

Hi Len,

Did you also set the optimization level (Optimization level (--opt_level, -O) ) to 3 in CCSv4.1.2?

Thanks

0 Len Koss over 15 years ago in reply to Ki

Intellectual 300 points

Hi ki-Soo,

I initially had the level set to 0 but then I changed it to 3 and noticed a huge improvement in performance. But there's another option called "Optimize for Speed" under the "optimization" section which i set to level 5 and that made the performance worse. So my questions are:

1) What's the optimum level for this other setting?

2) What other compiler options should I set to optimize performance?

Thanks,

Len

0 Ki over 15 years ago in reply to Len Koss

TI__Guru**** 480771 points

I'm going to move this to the compiler forum. They can best answer your questions.

Thanks

0 AartiG over 15 years ago in reply to Len Koss

TI__Guru**** 173310 points

Len,

You may find this link helpful: http://processors.wiki.ti.com/index.php/-mf_compiler_option

0 Len Koss over 15 years ago in reply to AartiG

Intellectual 300 points

Aarti,

This is helpful.

Thanks,

Len

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Choosing compiler optimiztions through the CCSv4 gui