Intel® VTune™ Amplifier XE and Intel® VTune™ Amplifier for Systems Help
Use this analysis type to identify GPU tasks with high GPU utilization and estimate the effectiveness of this utilization. The tool infrastructure automatically aligns clocks across all cores in the entire system so that you can analyze some CPU-based workloads together with GPU-based workloads within a unified time domain.
Use the GPU Hotspots analysis to:
Identify how effectively your application uses OpenCL kernels (for Linux* and Window* targets only)
Analyze execution of Intel Media SDK tasks over time (for Linux targets only)
Explore GPU usage and analyze a software queue for GPU engines at each moment of time
Explore the performance of your application per selected GPU metrics over time
Syntax:
$ amplxe-cl -collect gpu-hotspots [-knob <knobName=knobValue>] -- <target> [target_options]
Knobs: gpu-sampling-interval, gpu-counters-mode, enable-gpu-runtimes, enable-stack-collection.
For the most current information on available knobs (configuration options) for the GPU Hotspots analysis, enter:
$ amplxe-cl -help collect gpu-hotspots
Example:
This example runs GPU Hotspots analysis with enabled OpenCL™ kernels tracing on the specified application.
$ amplxe-cl -collect gpu-hotspots -knob enable-gpu-runtimes=true -- home/test/myApplicationWhen the data collection is complete, do one of the following to view the result:
Use the -report action to view the data from command line.
Use the -report-output action to write report to a .txt or .csv file
Open the data collection result (*.amplxe) in the VTune Amplifier graphical interface.