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New AMD ERAPS Feature Yields Additional Performance Gains On Zen 5
At the beginning of November I wrote about AMD Linux engineers posting Linux patches enabling a new 'ERAPS' feature for Zen 5.
ERAPS wasn't talked about by AMD at the Zen 5 launches of the Ryzen 9000 / Ryzen AI 300 series or with the more recent EPYC 9005 "Turin" launch but when enabled, the Enhanced Return Address Prediction Security feature can help deliver some additional gains on new AMD Zen 5 systems by allowing some existing software security mitigations to be avoided. AMD ERAPS is for helping to recover some of the performance of security mitigations introduced following the Spectre class vulnerabilities over the past several years. Since the original posting of the ERAPS Linux kernel patches earlier this month, the code continues to be discussed among upstream stakeholders.
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