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The Ongoing CPU Security Mitigation Impact On The Core i9 10900K Comet Lake
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In Intel language the original design was a feature not a bug. In practice, you avoid the bug(s) by either removing the feature(s) or adding extra cycles to check/flush data structures. All new benchmarks should have the updated microcode/firmware/OS whatever to mitigate. We assume everyone, including Intel, now do the same.
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Originally posted by ezst036 View PostWhen will Intel have this fixed in the hardware?
People don't realize that these things can't change quickly, thing of it like stopping a train and making it go the opposite direction. It takes time.
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This CPU is affected by LVI and the results are meaningless without LVI mitigation.
Intel Chips Vulnerable to "Reverse-Meltdown" Attacks - Mitigations Carry Significant Performance HitIntel Chips Vulnerable to New Load Value Injection Exploits - Mitigations Carry Significant Performance Hit; Only Silicon Changes Could Fix
The true Intel performance is sometimes only 7%. Nobody sane would use such insecure CPU in the server without full mitigations.
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Originally posted by Pranos View PostThe Intel CPUs are based on the old i/C2D architecture and are only new generations. I dont think they will ever fix them in hardware... to be real, why should they? If they have already fixed it in Software?
Moreover, some of the software fixes can produce a loss of performance on platforms not effected by the exploit like when Intel released a (IIRC) Spectre fix for the kernel that was basically an all-or-nothing fix (meaning that it would effect every processor when on or none when off and not just things actually effected by Spectre). The IIRC is because that may have been for Meltdown....been quite a few of these lately (mitigations and fixes) and they're hard to keep track of if you're not a security nerd.
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Originally posted by Pranos View PostThe Intel CPUs are based on the old i/C2D architecture and are only new generations. I dont think they will ever fix them in hardware... to be real, why should they? If they have already fixed it in Software?
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The Intel CPUs are based on the old i/C2D architecture and are only new generations. I dont think they will ever fix them in hardware... to be real, why should they? If they have already fixed it in Software?
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Originally posted by Ribs View PostAre the mitigations fixed in this CPU and the software is applying unnecessary fixes to problems that no longer exist? I'm struggling to understand this point.
If that's not the case, and Intel is still releasing CPUs in 2020 which have these vulnerabilities then I have absolutely no idea how they are getting away with this, or why anybody would buy such a product with such known defect in it.
Said it before, I'll say it again: It's going to be a long, long time before I buy another Intel CPU.
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