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If, as you say, AMD is not affected by Meltdown unlike Intel, will this significantly change the server market? Excuse the pun, but would this make e.g. AMD EPY
by imjasonmiller 9y ago
If, as you say, AMD is not affected by Meltdown unlike Intel, will this significantly change the server market? Excuse the pun, but would this make e.g. AMD EPYC a lot more attractive for such data centers?
- zeusk 9y agoAMD has confirmed it isn't affected by Meltdown. https://lkml.org/lkml/2017/12/27/2 https://lkml.org/lkml/2017/12/27/2
- arien 9y agoAren't they still vulnerable to Spectre?
- naasking 9y agoPretty much every fast CPU is vulnerable to some subset of Spectre.
- Choco31415 9y agoCorrect, and so are Samsung and Qualcomm CPU’s, according to the original paper: https://spectreattack.com/spectre.pdf https://spectreattack.com/spectre.pdf
- Tuna-Fish 9y agoYes to the bounds check violation version, so far no to the BTB poisoning version. The bounds check version only works inside a single process, so is only relevant when you run untrusted code within the same process as some private data (such as JS in a web browser). AMD claims that they believe that the way their branch predictor works effectively makes the BTB poisoning unusable, but there is no actual proof, and their statement regarding it was much more wishy-washy than they were with meltdown. (Which they specifically state they are completely immune to.)
- em3rgent0rdr 9y agoRegarding branch predictor spoiling, if AMD doesn't update the branch predictor based off evaluation of branches the occurred along a speculative path, then the Spectre exploit (from my understanding that it trains the branch predictor using speculative code) won't be able to work.
- pqh 9y agoWhat pun?
- ayushgp 9y agoEpic Games - AMD EPYC
- hbk1966 9y agoI'm guessing AMD now has some of the fastest CPUs on the market.