Intel® VTune™ Profiler User Guide

User Guide

Contents

Intel® Media SDK Program Analysis

Use Intel® VTune™ Profiler to enable analysis of Intel® Media SDK tasks execution over time.
Prerequisites
:
To analyze the Intel Media SDK tasks execution, make sure to do the following:
To configure the Intel Media SDK program analysis, do the following:

Configure Target

Launch the
VTune
Profiler
 with root privileges and configure analysis for your Intel Media SDK target.
For the
Launch Application
 mode, follow the standard project setup and analysis target setup process and specify your application or a script as a target.
VTune
Profiler
 automatically sets environment variables and, on Linux, creates an
.mfx_trace
 configuration file for Intel Media SDK program analysis.
For the
Attach To Process
 and
Profile System
 modes, the
.mfx_trace
 is not created by the
VTune
Profiler
 automatically, which makes the Intel Media SDK program analysis incomplete. You need to manually enable MFX tracing as follows:
  1. Configure the system to include ITT traces to the result.
    For Linux: 
    export INTEL_LIBITTNOTIFY32=/opt/intel/oneapi/vtune/latest/lib32/runtime/libittnotify_collector.so
export INTEL_LIBITTNOTIFY64=/opt/intel/oneapi/vtune/latest/lib64/runtime/libittnotify_collector.so
    For Windows: 
    set INTEL_LIBITTNOTIFY32=C:\Program Files (x86)\Intel\oneAPI\vtune\latest\bin32\runtime\ittnotify_collector.dll 
set INTEL_LIBITTNOTIFY64=C:\Program Files (x86)\Intel\oneAPI\vtune\latest\bin64\runtime\ittnotify_collector.dll
  2. On Linux, before running the analysis, generate the
    .mfx_trace
     file: 
    echo "Output=0x30" > $HOME/.mfx_trace
chmod +r $HOME/.mfx_trace
If, for some reason, settings in this file are different from the settings specified in the
VTune
Profiler
 project, the
.mfx_trace
 settings will prevail and re-write the
VTune
Profiler
 project settings.

Run Analysis

  1. Click the
    Configure Analysis
     button on the
    VTune
    Profiler
     toolbar.
  2. In the
    HOW
     pane, select an analysis type for Intel Media SDK program profiling, for example: GPU Compute/Media Hotspots analysis, GPU Offload analysis, or a custom analysis.
  3. Make sure the
    Trace GPU Programming APIs
     option is selected.
  4. Optionally: For custom analysis, select the
    GPU Utilization
     option.
    For the GPU Compute/Media Hotspots and GPU Offload analysis types, this option is enabled by default.
  5. Click
    Start
     to launch the analysis.
When the data collection completes, the
VTune
Profiler
 opens the result in the default viewpoint. Start with the
Graphics
 window to analyze the CPU workload during the execution of the Intel Media SDK tasks.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.