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A Linux patch is being tested to finally solve the trouble with Alder Lake CPUs

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According to Phoronix, a new Linux kernel patch will be released soon to address core priority issues on Alder Lake CPUs. The problem is caused by manually overclocking Alder Lake CPUs or enabling XMP memory profiles in the UEFI. If you do one of these things, Linux will place inefficient workloads on the wrong cores, lowering system performance.

Intel Turbo Boost Max Technology, in particular, appears to be the main problem. To achieve correct core prioritizing, Linux requires working Turbo Boost Max code. However, if the motherboard uses an XMP mode or the user inputs a custom core overclock, this code can easily be disabled by the motherboard.

When Turbo Boost Max is off, all cores are set to the ACPI CPPC’s highest performance level. Unfortunately, this causes the operating system to believe that all cores are performing at the same level, resulting in performance reduction.

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Due to Alder Lake’s hybrid architecture, which relies on high-performance cores and power efficiency cores to get work done efficiently, this is a big issue. When the operating system places crucial jobs on the efficiency cores and light workloads are placed on the performance cores, overall performance suffers.

Thankfully, a new Linux kernel patch to address these vulnerabilities is already being tested. Overclocking Alder Lake CPUs will no longer cause the OS’s core prioritization to fail once it is released.

source

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Nivedita Bangari
Nivedita Bangari
I am a software engineer by profession and technology is my love, learning and playing with new technologies is my passion.

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