Execution Time measure of a portion of code in our program

Francisco Aguilar

Other Parts Discussed in Thread: TMS320C6455, OMAPL138

Hello,

Could someone please help in the following issue? We're trying to measure the time that a portion of code spends during its execution. We're trying the function clock() of time.h library but it seems that it is not running. Could it be possible that we need to add some library in our project ir order to run appropriately? Do you know another way to measure the time consumed by a portion of code in our program?

Many Thanks in advace,

Kind Regards

over 15 years ago

0 Mariana over 15 years ago

TI__Mastermind 24340 points

What processor are you using? Are you using DSP/BIOS?

0 Francisco Aguilar over 15 years ago in reply to Mariana

Intellectual 380 points

Hello Mariana,

We're using TMS320C6455 but we're not using DSP/BIOS. Do you know some procedure to measure the execution time of a part of code? Any help will be very appreciated!

Many Thanks in advance,

kind regards

0 Mariana over 15 years ago in reply to Francisco Aguilar

TI__Mastermind 24340 points

Most of our newest C64x+ processors have the Time Stamp Counter Registers (TSCL). You can use it to profile your code.

For C6455 please see page 55 (section 2.9.13) of the TMS320C64x/C64x+ DSP CPU and Instruction Set Reference Guide

So your code should be like:

#include "c6x.h"  // needed
...

int start, stop;

TSCL = 0; // need to write to it to start counting

start = TSCL;

///... critical code 

stop = TSCL;
stop -= start; // stop will have the total number of CPU cycles

0 Francisco Aguilar over 15 years ago in reply to Mariana

Intellectual 380 points

Thank you so much Mariana!

0 Kishore over 15 years ago in reply to Francisco Aguilar

TI__Mastermind 39560 points

hello mariana,

i too am using TSCL. I have included the c6x.h but yet the compiler throws the error " identifier TSCL is undefined".

I have also included the path for c4c.h in project build settings include option.

Is there anything i am missing here?

pls let me know

thanks!

0 TimHarron over 15 years ago in reply to Kishore

TI__Mastermind 18130 points

Which device are you using? If your device does not include the TSCL/H register pairs then the c6x.h header is probably IFDEFing this register identifier out.

0 Kishore over 15 years ago in reply to TimHarron

TI__Mastermind 39560 points

well i am using the simulator. It is IFDEF i ning the identifier. But then when i defined that in the pre defined symbols, it gave way to some more errors like ( _cregister not to be define here....)

But i guess it should work on the simulator.. Right?

Thanks!

0 Kishore over 15 years ago in reply to Kishore

TI__Mastermind 39560 points

sorry i forgot to mention the device....c64x nyquist simulator

0 Kishore over 15 years ago in reply to Kishore

TI__Mastermind 39560 points

any suggestions?

thanks!

0 Mukul Bhatnagar over 15 years ago in reply to Kishore

TI__Guru* 83935 points

The simulator that you are using is likely not available externally, can you please take your query to the internal CCS forum to track and resolve incase there are any known issues w.r.t to the Ctimer/time stamp counter on this simulator.

In general on c64x+, c674x simulators this should work.

You might find this post helpful

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/112/p/11515/44835.aspx#44835

Regards

Mukul

0 Kishore over 15 years ago in reply to Mukul Bhatnagar

TI__Mastermind 39560 points

thanks for the pointer mukul.

0 STALIN over 11 years ago in reply to Mariana

Intellectual 260 points

Hi,

I am using OMAPL138 LCDK (ARM+C674 DSP) communicating through linux kernel and not by CCS.I am using the clock(), technique as few people mention.I am successful with the ARM but not with the DSP part.

my but the time code snippets are in MessageQapp.c (hlos) .The fact is that DSP is taking huge time time and showing 0.000 sec.

Please resolve this problem.

Thanks and Regards.

Stalin.

0 sridharan p over 9 years ago in reply to Mariana

Prodigy 40 points

Hello Mariana,

i have tried with this program but i got negative values.This TSCL register is 32-bit and my program timing exceed the 32-bit register values.i thought this the problem? but i dont know exactly.please suggest some good answers.

if i can able to reset the register value in middle of the program.for example uplink one part and downlink one part.if it is possible to reset.please tell me the way to solve this problem.

#include "c6x.h"  // needed
...

int start, stop;
/***********************************Uplink Measurement*****************/
TSCL = 0; // need to write to it to start counting

start = TSCL;

uplink();

stop = TSCL;
stop -= start; // stop will have the total number of CPU cycles

/**************************Downlink measurement****************/
TSCL = 0;

start = TSCL;

Downlink();

stop = TSCL;
stop -= start; // stop will have the total number of CPU cycles

/*********************************************************************/

Thanks and regards,

sridharan p.

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Execution Time measure of a portion of code in our program