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ACRN Release Version 1.4

By November 22, 2019April 23rd, 2020Blog

We are pleased to announce the release of ACRN™ Hypervisor version 1.4 which introduces a number of new features.

What’s New in Release Version 1.4

  • ACRN now conforms to the Microsoft* Hypervisor Top-Level Functional Specification (TLFS).
  • ACRN scheduler framework re-architected.
  • WaaG (Windows as a guest) stability and performance has been improved.
  • Real-time performance of the RTVM (preempt-RT kernel-based) has been improved.

See the full release notes and latest documentation for more information about this 1.4 release.

Document updates

We have many reference documents available, including:

Newly added documents include:

Refer to the ACRN version 1.4 release notes for more details.

About the ACRN™ Project

ACRN is a flexible, lightweight reference hypervisor, built with real-time and safety-criticality in mind, optimized to streamline embedded development through an open source platform. To learn more, please visit

About the Linux Foundation

Founded in 2000, the Linux Foundation is supported by more than 1,000 members and is the world’s leading home for collaboration on open source software, open standards, open data, and open hardware. Linux Foundation’s projects are critical to the world’s infrastructure including Linux, Kubernetes, Node.js, and more.  The Linux Foundation’s methodology focuses on leveraging best practices and addressing the needs of contributors, users and solution providers to create sustainable models for open collaboration. For more information, please visit us at