AMD CPUs See Less Than 10% Performance Drop From Revised Spectre-v2 Mitigations

AMD CPUs See Less Than 10% Performance Drop From Revised Spectre-v2 Mitigations

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Spectre-v2 isn’t going anywhere soon. VUSec, a group of researchers from Vrije Universiteit Amsterdam, recently discovered Branch History Injection (BHI), a byproduct of Spectre-v2 that affects Intel and Arm processors. While Intel has taken a performance hit up to 35%, AMD’s processors got off easy, according to Phoronix’s latest report. AMD utilizes a Retpoline (return and…

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New Spectre Exploits Beat All Mitigations: Fixes to Severely Degrade Performance

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Researchers from two universities have discovered several new variants of Spectre exploits that affect all modern processors from AMD and Intel with micro-op caches. Existing Spectre mitigations do not protect the CPUs against potential attacks that use these vulnerabilities. Meanwhile, researchers believe that mitigating these vulnerabilities will cause more significant performance penalties than the fixes…