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First off it could easily be I've not done this last step in the GPU option setup:
"If you use 8th Generation Intel® Core™ processor, you will need to add:
i915.alpha_support=1
to the 4.14 kernel command line, in order to enable OpenCL functionality for this platform."
I have kernel 4.15.0 and I don't have a clue as to if an i7-4500U is 8th generation. I'd rather not mess with the system boot up unless I know its absolutely necessary.
Second is it even worth trying to use the GPU on this chip?
Here is my sample code command, I believe its correct as its just the command I've used for CPU with CPU replaced by GPU:
~/inference_engine_samples/intel64/Release$ ./interactive_face_detection_demo -d GPU -m ~/intel/computer_vision_sdk/deployment_tools/intel_models/face-detection-retail-0004/FP32/face-detection-retail-0004.xml -d_ag GPU -m_ag ~/intel/computer_vision_sdk/deployment_tools/intel_models/age-gender-recognition-retail-0013/FP32/age-gender-recognition-retail-0013.xml -d_em GPU -m_em ~/intel/computer_vision_sdk/deployment_tools/intel_models/emotions-recognition-retail-0003/FP32/emotions-recognition-retail-0003.xml -d_hp GPU -m_hp ~/intel/computer_vision_sdk/deployment_tools/intel_models/head-pose-estimation-adas-0001/FP32/head-pose-estimation-adas-0001.xml
Here is the error:
InferenceEngine:
API version ............ 1.4
Build .................. 19154
[ INFO ] Parsing input parameters
[ INFO ] Reading input
[ INFO ] Loading plugin GPU
API version ............ 1.5
Build .................. 19154
Description ....... clDNNPlugin
[ INFO ] Loading network files for Face Detection
[ INFO ] Batch size is set to 1
[ INFO ] Checking Face Detection network inputs
[ INFO ] Checking Face Detection network outputs
[ INFO ] Loading Face Detection model to the GPU plugin
[ ERROR ] failed to create engine: clGetPlatformIDs error -1001
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Sorry Walter,
It seems that i7-4500U has an unsupported clDNN GPU:
There was another thread in this forum explaining the issues with Intel HD Graphics 4400 or similar gen GPUs.
https://software.intel.com/comment/1931157
basically lacks OpenCL out-of-order execution
cheers,
nikos
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Sorry Walter,
It seems that i7-4500U has an unsupported clDNN GPU:
There was another thread in this forum explaining the issues with Intel HD Graphics 4400 or similar gen GPUs.
https://software.intel.com/comment/1931157
basically lacks OpenCL out-of-order execution
cheers,
nikos
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Thanks a lot, saves me much effort and wasted time, any insight as to how much a supported GPU improves on CPU only?
Initially for my purposes its looking like on i3 or better CPU outperforms the original NCS, and is still a bit better than the NCS2, but the NCS2 is about 2.5X faster than the original NCS.
My next task is to test on the Raspberry Pi3B+ where I know an NCS will be required, and if I can get a 2.5X improvement in frame rate all this OpenVINO stuff will have been worth it.
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> any insight as to how much a supported GPU improves on CPU only?
It really depends on the CPU and GPU model.
Some GPUs like the GT4 in the Core i7-6770HQ for example are much faster than GT2 (like the (U)HD 630 ) ; all depends on how many EUs and GPU clock.
Comparing CPU to GPU again it depends how many CPU cores and what clock. If you compare to a dual core Atom CPU then GPU will be faster. There is also the power efficiency part. It really depends on your application and fps vs. power requirements.
Cheers,
nikos
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