SDRAM is too fast??

Hi!
I'm developing an image processing algorithm for the ADSP21369 and
trying it into de EZ-KIT 21369... I load the image  (640*480 bmp
image) with the Image Viewer into SDRAM and process it directly from
SDRAM.

Trying to do it with the DMA I found that there are no significatively
difference betwen them. That's possible?? Or I'm doing somethimg
wrong??

I measure times like this:
	START_CYCLE_COUNT(start_count);
	 // here my algorithm
	STOP_CYCLE_COUNT(final_count,start_count);
        PRINT_CYCLES("Number of cycles: ",final_count);

Thanks!!

On Nov 16, 4:28 am, Laplace <joselui...@gmail.com> wrote:
> Hi!
> I'm developing an image processing algorithm for the ADSP21369 and
> trying it into de EZ-KIT 21369... I load the image  (640*480 bmp
> image) with the Image Viewer into SDRAM and process it directly from
> SDRAM.
>
> Trying to do it with the DMA I found that there are no significatively
> difference betwen them. That's possible?? Or I'm doing somethimg
> wrong??
>
> I measure times like this:
>         START_CYCLE_COUNT(start_count);
>          // here my algorithm
>         STOP_CYCLE_COUNT(final_count,start_count);
>         PRINT_CYCLES("Number of cycles: ",final_count);
>
> Thanks!!

Are you processing a block of data while the next block transfers from
SDRAM to on-chip memory? If so then so long as your block processing
time is longer than the block transfer time, you won't take a hit for
the transfer time (except for the first transfer).

John