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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Intel Thread Director Virtualization Patches Boost Some Workloads By ~14% (www.phoronix.com)

submitted 9 months ago by [email protected] to c/[email protected]

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With this Intel Thread Director Virtualization to ensure the VM can properly manage task placement between P and E cores, the feature ended up yielding around 14% better performance than the status quo. That 14% win was with the 3DMark benchmark running on a Windows VM.

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[–] [email protected] 5 points 9 months ago

This is the best summary I could come up with:

Intel Thread Director support has come along with various Linux kernel improvements to better handle task placement between the P and E cores.

One area seeing new work now though is for virtual machines (VMs) running on Intel hybrid systems with a new Linux kernel patch series working on Thread Director Virtualization.

With this Intel Thread Director Virtualization to ensure the VM can properly manage task placement between P and E cores, the feature ended up yielding around 14% better performance than the status quo.

Our ITD virtualization is not bound to VMs' hybrid topology or vCPUs' CPU affinity.

To enable ITD related scheduling optimization in Win11 VM, some other thermal related support is also needed (HWP, CPPC), but we could emulate it with dummy value in the VMM (We'll also be sending out extra patches in the future for these)."

Interesting work and hopefully this Intel Thread Director Virtualization support will be worked into shape for mainlining into the Linux kernel in the near future for further enhancing Intel Core hybrid CPUs.

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