The Hyperthreading of Skylake and Kaby Lake is defective

[cobito]

An OCaml developer has found a flaw in the Hyper Threading implementation of the last two generations of Intel.

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[Yorus]

Well, maybe I had that problem on my computer and I didn't even notice it, although I will review the proprietary drivers part of my Linux Mint in case the micro-code update comes.

[palotes]

This kind of failure is common. Don't blame the windowserons. It's not a platform-specific failure as I've read elsewhere and people believe it because it first appeared on the debian mailing lists. It's a hardware bug that affects all systems. But to reproduce the failure, you need to get a compiled code that is very difficult to obtain, which is to have a very small loop (less than 64 microinstructions). What the sky/kabylake does is to infinitely parallelize this code, saturating the CPU resources.