Using NEO runtime with VTune Amplifier

You can use the Intel VTune Amplifier to identify GPU "hotspots". It will show GPGPU queue, GPU usage, memory throughputs, etc. Using this tool, you can compare how the application behaves under different configurations (LWS, GWS, driver versions, etc.) and identify bottlenecks.

Requirements

Intel(R) VTune(tm) Amplifier
Intel(R) SDK for OpenCL(tm) Applications
Intel(R) Metrics Discovery Application Programming Interface
Current Intel(R) OpenCL(tm) GPU driver

Installation

Note: This is an example. Actual filenames may differ

Install OpenCL SDK & VTune

cd
tar xvf intel_sdk_for_opencl_2017_7.0.0.2568_x64.gz
tar xvf vtune_amplifier_2018_update2.tar.gz
sudo dpkg -i intel-opencl_18.26.10987_amd64.deb
cd ~/intel_sdk_for_opencl_2017_7.0.0.2568_x64/; sudo ./install_GUI.sh
cd ~/vtune_amplifier_2018_update2/; sudo ./install_GUI.sh #use offline activation with file

To verify that VTune was installed properly run:

lsmod | grep sep4

This should return 2 lines. Otherwise follow sepdk installation in VTune documentation.

Compile and install MD API - see MD API README for instructions.

Running VTune

/opt/intel/vtune_amplifier_2018/bin64/amplxe-gui

Note: If you built Metrics Discovery with libstdc++ > 3.4.20, please use the following workaround:

sudo sh -c 'LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libstdc++.so.6 /opt/intel/vtune_amplifier_2018/bin64/amplxe-gui'

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