Linux gaming is faster because Windows APIs are becoming Linux kernel features

Linux gaming performance has improved significantly due to the integration of Windows API functionalities directly into the Linux kernel via a new driver called NTSYNC, now included by default on Steam Deck and recent Linux distributions.

NTSYNC is a small driver added to the Linux kernel that provides native implementation of Windows-specific tools used by modern games to coordinate multiple processes. This driver has demonstrated notable performance gains over previous methods relying on translation layers like Proton and Wine. It is now loaded by default on every Steam Deck that has the latest updates, indicating widespread adoption. The driver allows Linux to handle Windows game processes more directly, reducing overhead and latency, which translates into smoother gameplay and better resource management.

While NTSYNC’s development was announced by Linux kernel maintainers, its specific technical integration and performance metrics are still being evaluated by the community. The driver’s primary function is to enable Linux kernels to natively support Windows synchronization primitives, which are critical for the complex multitasking in modern games. This development marks a shift from relying solely on user-space translation layers to kernel-level support, potentially revolutionizing Linux gaming performance.

Why It Matters

This development is significant because it represents a fundamental change in how Linux handles Windows-based gaming workloads, moving towards native kernel support. For gamers, especially those using Steam Deck and other Linux desktops, this could mean better performance, lower latency, and a more seamless gaming experience. It also signals a maturing of Linux’s gaming ecosystem, reducing reliance on translation layers like Proton and Wine, and potentially attracting more AAA titles to Linux platforms.

Background

For years, Linux gaming improvements have largely depended on updates to Wine and Proton, which translate Windows API calls into Linux-compatible instructions. The introduction of NTSYNC into the Linux kernel marks a shift towards kernel-level integration of Windows APIs, which could streamline performance. The Steam Deck, released in 2022, played a pivotal role in popularizing Linux gaming, as Valve’s Proton layer enabled many Windows games to run smoothly on Linux. The recent push for kernel-level Windows API support is part of broader efforts by the Linux community to enhance native compatibility and performance, especially as Windows support phases out for some users and new hardware demands emerge.

“NTSYNC provides native Windows synchronization primitives within the Linux kernel, which significantly reduces overhead in Windows-based game processes.”

— Linux kernel developer

“The default inclusion of NTSYNC on Steam Deck ensures users experience improved performance without additional configuration.”

— Valve spokesperson

What Remains Unclear

It is not yet clear how broadly NTSYNC will be adopted in other Linux distributions beyond Steam Deck, or how it will impact compatibility with a wider range of Windows games. Long-term stability and performance metrics are still being evaluated by the community. Additionally, the full technical details of NTSYNC’s implementation and its interaction with existing kernel components remain under review.

What’s Next

Further updates are expected as Linux kernel maintainers refine NTSYNC and expand its support to more distributions. Gaming performance benchmarks will be published, and developers will assess compatibility with a broader set of titles. The Linux community will monitor stability and performance impacts in upcoming kernel releases, potentially leading to wider adoption in enterprise and desktop environments.

Key Questions

What is NTSYNC?

NTSYNC is a kernel-level driver that provides native Windows synchronization primitives within the Linux kernel, improving how Linux handles Windows game processes.

How does NTSYNC improve gaming performance on Linux?

By integrating Windows APIs directly into the kernel, NTSYNC reduces the overhead and latency involved in translating Windows calls, resulting in smoother gameplay and better resource management.

Is this development available on all Linux distributions?

Currently, NTSYNC is included by default on latest updates for Steam Deck and some Linux kernels. Broader distribution support is expected as kernel updates are rolled out.

Will this affect non-gaming Linux applications?

While primarily aimed at gaming, native Windows API support at the kernel level could benefit other Windows-dependent applications running on Linux, though specific impacts are still being studied.