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From what I’ve read, POWER was affected by spectre/ meltdown too. However, Intels initial response to play down it’s significance can’t have gone well with larg
by shrumm 9y ago
From what I’ve read, POWER was affected by spectre/ meltdown too. However, Intels initial response to play down it’s significance can’t have gone well with large enterprise customers. In addition to the performance boosts the article refers to, I wonder how much of an impact the recent kerfuffle over Intels response had on POWER demand.
- classichasclass 9y agoIBM already released patches for this, at least for POWER7+. Interestingly the Meltdown issue seems "only" to affect the L1 cache, so L2 does not need to be evicted. Raptor says all Talos systems will be patched prior to shipping. https://wiki.raptorcs.com/wiki/Speculative_Execution_Vulnerabilities_of_2018 https://wiki.raptorcs.com/wiki/Speculative_Execution_Vulnera...
- newman314 9y agoPatching POWER for Spectre/Meltdown was a pain but we are done with it. You have to apply patches to the LPAR/OS, VIOS and firmware. IBM has acknowledged that there will be a performance hit but have not provided any quantified numbers that I have seen so far.
- hindsightbias 9y agohttps://ibm.biz/BdZjPy https://ibm.biz/BdZjPy "All POWER8 and POWER9 results in this table reflect performance with firmware and Operating System updates to mitigate Common Vulnerabilities and Exposures issue numbers ... known as Spectre and Meltdown"
- newman314 9y agoThanks. I also just found the rPerf and CPW consolidated spreadsheet from IBM (including pre and post Spectre/Meltdown numbers). https://www.ibm.com/developerworks/community/files/basic/anonymous/api/library/91037d4b-518a-4662-8832-0049a2d2563c/document/4c46604b-c783-4843-86d7-c34a8dbe0bc0/media https://www.ibm.com/developerworks/community/files/basic/ano...
- reirob 9y agoHow did you verify if the patched system is not affected anymore? I'm really curious what means the users have to verify the effectiveness of such patches.