Allen
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Joined: Oct 1999
Posts: 8,856
Ohio USA
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Intel Loses 5X More Average Performance Than AMD From Mitigations: Report
Phoronix's .. found the fixes reduce Intel's performance by 16% (on average) with Hyper-Threading enabled, while AMD only suffers a 3% average loss.
Intel's chips can suffer even more with Hyper-Threading (HT) disabled, a measure that some companies (such as Apple and Google) say is the only way to make Intel processors completely safe from the latest vulnerabilities. In some of Phoronix's testing, disabling HT reduced performance almost 50%
To be clear, this is not just testing with mitigations for MDS (also known as Fallout, Zombieload, and RIDL), but also patches for previous exploits like Spectre and Meltdown
AMD's processors are immune to the latest round of vulnerabilities, and its users also don't need to turn off Simultaneous Multi-Threading (or SMT)
Previously, it was written that Intel "cut corners" in its CPU hardware design to help make their CPU instructions per clock higher than AMD -- now, Intel users needing protection from "attacks" can lose much of that advantage over AMD. AMD did not "cut corners" with their CPU design -- so do not have the same vulnerabilities.
