Time profiling for certain code

1898541

Hi,

I am a beginner to DSP programming so I have a basic question. If you guys can help, would be so much appreciated.

How do I evaluate the time consumed by a particular function on a DSP core (Let's say time taken in terms of Instruction Cycles).

Should I look into the assembly file and then count how many instructions are generated for a particular function. Based on that info should I then evaluate the time ? Would that be appropriate or there are better options available ? The assembly here is very complicated and most of it is beyond my comprehension. But I am reading more and more on it.

Note: I am using OMAPL137 and only using the DSP core.

over 13 years ago

0 Asheesh Bhardwaj over 13 years ago

TI__Expert 4680 points

Please refer the below forum post. You will be able to find very usefule links for profiling, optimising, debugging. Check the quicktips link for your clocking.

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/112/t/60471.aspx

Regards

Asheesh

0 Rahul Prabhu over 13 years ago in reply to Asheesh Bhardwaj

TI__Guru** 116170 points

All the OMAPLx devices have the C674x DSP core which has a free running timer register(TSCL, TSCH) for accurate measurement of clock cycles.

Please refer to the header file attached to use this time functions for accurate measurement of clock cycles.

3022.c6_timer.h

You can also use clock APIs from time.h but those functions may not give you the most accurate results as they approximate the target device clock cycles. To use this you will need to enable the clock under Run->Debug->clock->enable menu in Code composer studio, similar to what is shown here:

http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/t/35754.aspx

Hope this helps. Good luck

Regards,

Rahul

0 1898541 over 13 years ago in reply to Rahul Prabhu

Expert 1105 points

Thanks Rahul for the answer. I do not have the physical platform for the moment. Can this be done virtually ?

Is there a simulator or something which can help here ..

Also I would require some time to digest these posts and reply again.

Thanks,

0 1898541 over 13 years ago in reply to Asheesh Bhardwaj

Expert 1105 points

Thanks Asheesh for the help

0 Rahul Prabhu over 13 years ago in reply to 1898541

TI__Guru** 116170 points

TSCL and TSCH can be only used on the hardware. For virtually calculating the clock cycles on C674x DSP , you can use the second option of using clock APIs from time.h and use the target platform as C674x Cycle Accurate simulator in code composer studio. Note please enable the clock as I had described in my earlier post to obtain the benchmarks.

Regards,

Rahul

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Time profiling for certain code