Quote:
Originally Posted by divxmaster
As a follow up to my post a few months ago re spectre/meltdown patching and its influence on x265 encoding fps,
(where I found on my skylake quad it made virtually no difference),
I have now test my haswell system (4770k) with the microsoft microcode updates release two days ago (KB4091663 for 1703 I am running).
The latest KB patches the microcode for spectre variant two (branch target injection), at boot time only. GRC's Inspectre shows my system is now fully patched.
This latest KB DOES affect throughput fps. I have seen a drop of about 2.5%. Not a big deal luckily. I will just adjust my conservative OC
from 4.1ghz to 4.2ghz. (which is +2.5%).
Cheers,
Divxmaster
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Thanks for that. I typically classify any performance difference under 5% (in either direction) as noise when measured on a real system... so I suppose it is fair to say that Specrte and Meltdown don't affect us. This is not surprising as we barely make syscalls that require escalated privileges, which is where these bugs kick-in and safe guard!