opencl performance test

asked 2013-11-24 23:11:26 -0600

I've compiled OpenCV 2.4.7 with OpenCV support. Am using an AMD V5900.
I want to do some OpenCV tests. I'm not sure how to test/verify that OpenCL is being used. I ran perf and test and got these results:

opencv_test_ocl.exe 244 FAILED TESTS YOU HAVE 2 DISABLED TESTS

opencv_perf_ocl.exe 40 FAILED TESTS YOU HAVE 4 DISABLED TESTS

The only comparison sample I saw was ocl-example-squares.exe. It report this: cpp average time: 66.0707ms ocl average time: 90.9966ms How is that to be interpreted? What is the best way to measure/report the difference in performance between the CPU and GPU?

Thanks, Chris

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Had also meant to ask this. The doc says to add the environment variable OPENCV_OPENCL_DEVICE. MUST one set that env. var. to get OpenCL?

intrasight ( 2013-11-24 23:18:59 -0600 )edit

Where can I find the sample ocl speed test that you mentioned in this post? I am using OpenCV 3.0 beta.

user10001 ( 2015-04-09 03:27:35 -0600 )edit

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answered 2013-11-25 04:08:43 -0600

Alexander Smorkalov

5862 ●2 ●22 ●58 http://alex-alchemist....

OpenCL module does not have plain C/C++ fail-backs as I know. It means, that all performance and accuracy tests use OpenCL. The only possible difference here is OpenCL implementation. You can set device id and type of OpenCL impl by OPENCV_OPENCL_DEVICE environment variable.

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I guess what I am asking is how to verify that OpenCV is using the OpenCL module. And also, is it necessary to set the environment variable OPENCV_OPENCL_DEVICE for OpenCV to use the OpenCL module?

intrasight ( 2013-11-29 20:05:48 -0600 )edit

I set the env var "OPENCV_OPENCL_DEVICE" to "AMD:GPU:1" and now I get an error when I run the OpenCV-CLIntro sample ERROR: Required OpenCL device not found, check configuration: AMD:GPU:1

The documentation on this env var is sort of cryptic. Are there more complete examples available? What is wrong with the value I have set?

intrasight ( 2013-11-30 23:14:45 -0600 )edit

If you want to use GPU impl of OpenCL just set OPENCV_OPENCL_DEVICE=:GPU:

Alexander Smorkalov ( 2013-12-02 01:21:39 -0600 )edit

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