First Run :

root@dra7xx-evm:/opt/vision_sdk# ./a.out 
BGR2GRAY  tdiff=23.288173 ms 
GaussBlur tdiff=25.809181 ms 
Canny     tdiff=45.344797 ms 

Second Run :

root@dra7xx-evm:/opt/vision_sdk# ./a.out 
BGR2GRAY  tdiff=2.687742 ms 
GaussBlur tdiff=6.167669 ms 
Canny     tdiff=11.114363 ms

After Enabling OPENCL

root@dra7xx-evm:/opt/vision_sdk# export TI_OCL_LOAD_KERNELS_ONCHIP=Y
root@dra7xx-evm:/opt/vision_sdk#  export TI_OCL_CACHE_KERNELS=Y
root@dra7xx-evm:/opt/vision_sdk#  export OPENCV_OPENCL_DEVICE='TI DRA7:ACCELERATOR:TI Multicore C66 DSP'

Third Run:

root@dra7xx-evm:/opt/vision_sdk# ./a.out 
BGR2GRAY  tdiff=2.687742 ms 
GaussBlur tdiff=6.167669 ms 
Canny     tdiff=11.114363 ms