Скачать или смотреть Resolving the No Call Stack Information Issue in VTune GUI

Discover how to troubleshoot and enable call stack information in Intel VTune GUI for effective hotspot analysis on Ubuntu.
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This video is based on the question https://stackoverflow.com/q/67310804/ asked by the user 'AlekhyaV - Intel' ( https://stackoverflow.com/u/15766425/ ) and on the answer https://stackoverflow.com/a/67699431/ provided by the user 'AlekhyaV - Intel' ( https://stackoverflow.com/u/15766425/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting the No Call Stack Information Issue in Intel VTune GUI

Introduction

If you're using Intel VTune for hotspot analysis on Ubuntu and find that there is no call stack information appearing in the GUI, you're not alone. Many users encounter this issue, often accompanied by warnings after data collection. In this post, we will explore the potential causes of this problem and guide you through the steps to resolve it effectively.

Understanding the Problem

The absence of call stack information can hinder your ability to analyze performance bottlenecks in your application. Here are a few common reasons why you might encounter this issue:

Sampling Type: Not all sampling methods in VTune collect call stack information by default.

Configuration Settings: The settings in VTune might not be correctly configured to collect the necessary data.

Solution Overview

To ensure that you can collect call stack information during analysis, follow these steps:

Check Sampling Type

Run VTune Self-Checker Script

Validate Environment Settings

1. Check Sampling Type

By default, only user-mode sampling captures call stacks in Intel VTune. If you are using hardware (H/W) event-based sampling, make sure to enable the collect stack option explicitly:

Navigate to your VTune settings.

Look for the sampling settings or configuration options.

Ensure that the 'Collect Stack' option is checked.

Why is This Important? By confirming the settings, you guarantee that the tool can record the call stacks necessary for in-depth analysis.

2. Run VTune Self-Checker Script

Intel provides a helpful utility known as the VTune self-checker script. Running this script can help validate if all appropriate drivers are installed and if your system is correctly set up for performance data collection. Here’s how you can run it:

Open your terminal.

Navigate to the VTune installation directory.

Use the command to execute the self-checker script:

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Follow any prompts or instructions that the script may provide.

What to Look For: The self-checker will inform you if there are any missing dependencies or configuration issues that you need to address.

3. Validate Environment Settings

If you're still encountering issues after checking your sampling type and running the self-checker, it's time to validate your environment settings:

Confirm that VTune is updated to the latest version.

Ensure your operating system and drivers are compatible with the version of VTune you are using.

Check if any recent changes to your system could have affected performance data collection.

Conclusion

By following the aforementioned steps, you should be able to resolve the No Call Stack Information issue in Intel VTune GUI. Checking your sampling settings, running the self-checker script, and validating your environment are essential steps to ensure that you can effectively collect and analyze performance data. Don't let this issue stop you from optimizing your applications; with the right configurations, you can gain deep insights into performance bottlenecks.

If you continue to face barriers, consider exploring Intel's support forums or documentation for further guidance.