Intel® VTune™ Profiler User Guide

User Guide

Contents

Error Message: Cannot Enable Event-Based Sampling Collection

Cause

Intel® VTune™
Profiler
 cannot access the PMU resources in the virtualization environment since either the PMU resources are made unavailable through BIOS options or Hyper-V has been activated on an unsupported platform.

Known System Limitations

  • The sampling-based performance profiling on Hyper-V has only been available since Windows 10 RS3 release (version 1709) or later. Check your Windows OS version to make sure the
    VTune
    Profiler
     can run on the system:
    > winver
    For example,
    Version 1709
     indicates that the supported Windows 10 Fall Creators Update (RedStone3) is running on the system:
  • The Hyper-V allows the sampling-based performance profiling on the latest generation of Intel microarchitectures code named Skylake and Goldmont onward.
    VTune
    Profiler
     will not be able to work in the Hyper-V environment running on Intel microarchitectures code named Haswell or Broadwell.

Solution

To enable hardware event-based sampling collection for systems
prior to
 Windows 10 RS3, do the following:
  • Enable access to the PMU resources through BIOS options (if it was disabled manually).
  • Disable the
    Hyper-V
     feature as follows:
    1. From the
      Start
       menu select
      Search > Settings > Turn Windows features on or off
       to open the
      Windows Features
       window.
    2. Make sure to disable the
      Hyper-V
       feature and its sub-features and restart the system.
    3. If the
      Hyper-V
       feature is not disabled even after the system reboot, you must disable the BIOS VMX (virtualization feature) if it was not turned off already.
To troubleshoot hardware event-based sampling collection problems for Windows 10 RS3, make sure you have the Credential Guard and Device Guard security features disabled on your system.

Product and Performance Information

1

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