How to calculate cpu cycles of c64x+ in release mode in CCS3.3

Codec Engine is probably the easiest way to get your own codec running if you want a traditional 6446 setup (i.e. application on ARM and algorithm on DSP). There are a number of documents and examples that discuss how to use CE.

If you're not familiar with xDAIS, xDM and CE, I would suggest looking at IUNIVERSAL Examples - http://wiki.davincidsp.com/index.php/Getting_started_with_IUNIVERSAL as well as spending some time looking at the docs in the CE category http://wiki.davincidsp.com/index.php?title=Category:Codec_Engine

Since it sounds like you're writing a video codec, you'd probably want to use one of the xDM 1.x video interfaces. While the IUNIVERSAL Examples focus on the IUNIVERSAL interface, I think the docs are useful for explaining the process of integrating your algorithm with CE. There are examples within the CE product itself (codec_engine_x_xx/examples) which shows some video examples as well. 

There are a few ways you can profile once you already have a CE app, and that may be useful to you if you wish to understand the total system performance. See http://wiki.davincidsp.com/index.php/Codec_Engine_Profiling for some ideas. 

For question 1, using profile in CCSv3.3, you can get the CPU cycles if you use C64x+ CPU cycle Accurate simulator, and you can also get the total Cycles including L1/L2 cache missing cycles when using C64x+ Cycle Accurate simulator!

Yes, You can you CLK module to get the time in CPU cycles.

This is one of the way:

    Uint32 time1 = 0;

    Uint32 time2 = 0;

    Float CPUcycles = 0;

    .........

    time2 = CLK_gethtime();

    CPUcycles = (time2 - time1) * CLK_cpuCyclesPerHtime();

}

I am also stuck on the same problem of getting the CLK_gethtime() function to work. I want to know about the header files and what i have to include in the build options to get a DSP/BIOS clock to work for my work.I cannot get my program to compile as it shows Undefined Symbol "_CLK_gethtime" .... I need some serious help on this... I am using a C64x+ DSP CCS 3.3...

Thanks

Hi,

Here is one application showcasing the usage of CLK_gethtime() to measure the time elapsed.

--------------------------------------------------------------------------------------------------

Function description:

st_startPerfCounter(): Function to start measuring the time

st_stopPerfCounter(): Function to get the time elapsed

------------------Here is the application --------------------------

/* File to get included for measurement sake in BIOS5 */
#include <tistdtypes.h>
#include <stdio.h>
#include <string.h>
#include <std.h>
#include <log.h>
#include <sys.h>
#include <tsk.h>
#include <idl.h>
#include <ecm.h>
#include <iom.h>
#include <gio.h>
#include <gbl.h>
#include <clk.h>

#define DBG_PRINT_TRC0(x)
#define DBG_PRINT_TRC(x) printf x; printf("\n");
#define ST_STATUS_OK 0

static Uint32 st_startTickCount = 0;
static Uint32 st_endTickCount = 0;

Int32 st_startPerfCounter(void)
{
    st_startTickCount = CLK_gethtime(); 
     
    DBG_PRINT_TRC0(("Initial counter value (CLK_gethtime)= %u", st_startTickCount));

 return ST_STATUS_OK;

}

Int32 st_stopPerfCounter(void)
{
    Uint32 tickCount = 0;
 Float CPUcycles = 0;
 Float TimeAbsolute = 0;
 Uint32 timeInMSecs = 0;
   
    tickCount = CLK_gethtime();

 DBG_PRINT_TRC0(("Final counter value  (CLK_gethtime)= %u", tickCount));

 if(tickCount >= st_startTickCount)
 {
        st_endTickCount = tickCount - st_startTickCount;
 }
 else
 {
     st_endTickCount = (0xFFFFFFFF - st_startTickCount) + tickCount;
 }   

    DBG_PRINT_TRC0(("Elapsed h counts = %d", st_endTickCount));

    /* calculate absolute time in cpu cycles */
 CPUcycles = st_endTickCount * CLK_cpuCyclesPerHtime();

    /* calculate absolute time in milli seconds */
    TimeAbsolute = CPUcycles / GBL_getFrequency();

    DBG_PRINT_TRC0(("TimeAbsolute = %f ms", TimeAbsolute));

    /* calculate absolute time in micro seconds */
 timeInMSecs = (Uint32) (TimeAbsolute * 1000);

    DBG_PRINT_TRC(("TimeInMicroSeconds = %u us", timeInMSecs));

 return timeInMSecs;

}

-----------------------------------------------------------------------------------------------------

Hello,

Thanks for your reply. I actually want to calculate the time taken for an operation without using the CCS profile clock.  How can that be done  ? I am also having difficulties compiling and linking the files and I cant get the code above to work. Could you please give  me some point of view to the right direction on how to achieve this.

Thanks

Dhiraj K. Shah

hi,

What controller you are using?

Is there any function like CLK_gethtime() in msp430f5438a.

Because i want to calculate the execution time for single instruction in msp430f5438a.

thanks,

Ramana.