Tutorial
Starting Intel® VTune™ Profiler
Before You Begin
Build your application with symbol information and in Release mode with all optimizations enabled. For detailed information on compiler settings, see the Compiler Switches for Performance Analysis.
You can also use the matrix sample application available in <oneAPI_install_dir>/vtune/latest/samples/en/C++/matrix for Linux* OS and in <oneAPI_install_dir>\vtune\latest\samples\en\C++\matrix for Windows* OS. You can see sample results in <oneAPI_install_dir>/vtune/latest/samples/en/C++/matrix_results for Linux OS and <oneAPI_install_dir>\vtune\latest\samples\en\C++\matrix_results for Windows OS.
Set up the environment variables:
For Linux OS:
source <oneAPI-install-dir>/setvars.sh
By default, the <oneAPI-install-dir> is the following:
$HOME/intel/oneapi/ when installed with user permissions;
/opt/intel/oneapi/ when installed with root permissions.
For Windows OS:
<oneAPI-install-dir>\setvars.bat
By default, the <oneAPI-install-dir> for oneAPI components is Program Files (x86)\Intel\oneAPI.
NOTE:
You do not need to execute setvars.bat when using VTune Profiler within Microsoft* Visual Studio*.
Step 1: Start Intel VTune Profiler
Start Intel VTune Profiler through one of these ways:
Source |
Start Intel VTune Profiler |
|---|---|
Standalone/IDE (GUI) |
|
Standalone (Command line) |
Run the vtune command. |
Microsoft* Visual Studio* IDE |
Open your solution in Visual Studio. The VTune Profiler toolbar is automatically enabled and your Visual Studio project is set as an analysis target. |
menu button in the upper left corner and select New > Project... .
NOTE:
You do not need to create a project when running VTune Profiler from the command line or within Microsoft* Visual Studio.
Step 2: Configure and Run Analysis
After creating a new project, the Configure Analysis window opens with these default values:
In the Launch Application section, browse to the location of your application.
Click the Start to run Performance Snapshot on your application. This analysis presents a general overview of issues affecting the performance of your application on the target system.
Step 3: View and Analyze Performance Data
When data collection completes, VTune Profiler displays analysis results in the Summary window. Here, you see a performance overview of your application.
The overview typically includes several metrics along with their descriptions.
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Expand each metric for detailed information about contributing factors. |
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A flagged metric indicates a value outside acceptable/normal operating range. Use tool tips to understand how to improve a flagged metric. |
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See guidance on other analyses you should consider running next. The Analysis Tree highlights these recommendations. |
Next Steps
Performance Snapshot is a good starting point to get an overall assessment of application performance with VTune Profiler. Next, check if your algorithm requires tuning.
Run Hotspots Analysis on your application.
Follow a Hotspots tutorial. Learn techniques to get the most out of your Hotspots analysis.
- Once your algorithm is well-tuned, run Performance Snapshot again to calibrate results and identify potential performance improvements in other areas.