Intel Raptor Lake 0x129 CPU Microcode Performance Impact on Linux

Source: Hacker News

Article note: This was one of the things I was most interested in as soon as Intel started talking about microcode patches for localized over voltage issues. Test protocol isn't completely conclusive because it's a single device data set and there's potentially some context sensitivity, but looks like a good first pass. Possibly related to handling of branch-intensive code? Basically: slight regressions, near-negligible on most jobs. Most noticible on cryptographically intense loads at around a 10% hit.
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