On Wednesday, 28 February 2018 2:13:41 AM AEDT Miguel Gila wrote: > Microcode patches were not applied to the physical system, only the kernel > was upgraded, so I'm not sure whether the performance hit could come from > that or not.
Yes it would, it's the kernel changes that cause the impact. My understanding is tha the microcode update had features that were intended to mitigate that. Also note Intel later withdrew the microcode update due to instability on earlier CPUs (Linux distros reverted their firmware updates at that time): https://newsroom.intel.com/news/root-cause-of-reboot-issue-identified-updated-guidance-for-customers-and-partners/ and it appears the most recent update is intended to be pushed out via firmware updates rather than a microcode file loaded from the OS. https://newsroom.intel.com/news/latest-intel-security-news-updated-firmware-available/ Best of luck! Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC
