Part Number:AM5728
Tool/software: Linux
Hi Experts,
Our customer is evaluating sample code of “Example of OpenCL offload” with OpenCL/without OpenCL, during reading the following SDK manual.
Customer is using TMDSEVM572X.
In the case of “Lena.png” image-data, customer was able to confirm similar performance .
-----------------------
root@am57xx-evm:~# ./helloCross
★Lena＋DSP
BGR2GRAY tdiff=11.866208 ms
GaussBlur tdiff=4.691958 ms
Canny tdiff=4.576464 ms
root@am57xx-evm:~# export OPENCV_OPENCL_DEVICE='disabled'
root@am57xx-evm:~# ./helloCross
★Lena＋CPU
BGR2GRAY tdiff=3.656422 ms
GaussBlur tdiff=2.128656 ms
Canny tdiff=7.731872 ms
-----------------------
As the next step, after customer changed Image-data which is larger than Lena.png size, customer was evaluating it again. To be more specific, customer prepared two JPEG files ( Size: A4 paper, Color, 300dpi[2600pixelx 3600pixel]) and evaluated them. As the results of this performance, it indicates very high performance as follows. Since customer doubted data-cache was working, customer tried to evaluate them alternately. However, those results indicated same results.
Would you be able to expect those results? Customer is suspecting this evaluation is incorrect.
If you will be able to share your advice/comments on this, it would be appreciated. If you needs those JPEG files, I’ll request them.
-----------------------
root@am57xx-evm:~# ./helloCross
★JPG１＋DSP
BGR2GRAY tdiff=9.018402 ms
GaussBlur tdiff=4.846816 ms
Canny tdiff=4.393464 ms
★JPG２＋DSP
BGR2GRAY tdiff=0.163806 ms
GaussBlur tdiff=0.285480 ms
Canny tdiff=0.158762 ms
root@am57xx-evm:~# export OPENCV_OPENCL_DEVICE='disabled'
root@am57xx-evm:~# ./helloCross
★JPG１＋CPU
BGR2GRAY tdiff=47.800088 ms
GaussBlur tdiff=76.846824 ms
Canny tdiff=265.892167 ms
★JPG２＋CPU
BGR2GRAY tdiff=44.925118 ms
GaussBlur tdiff=72.242543 ms
Canny tdiff=253.617666 ms
-----------------------
Best regards,
Miyazaki