The Performance Impact Of MDS / Zombieload Plus The Overall Cost Now Of Spectre/Meltdown/L1TF/MDS

Written by Michael Larabel in Software on 18 May 2019 at 11:30 AM EDT. Page 9 of 10. 56 Comments.

Database processes remain one of the most impacted real-world workloads by these mitigations on the Intel side while AMD's Spectre mitigations did not affect PostgreSQL performance on the systems tested.

Redis sees a measurable hit from the mitigations, this time the AMD performance was also affected for the "GET" operations.

The kernel micro-benchmarks obviously show a large difference from these different mitigations.

Context switching used to be faster on Intel CPUs over the AMD Zen CPUs, but that is certainly no longer the case. With these default mitigations, context switching is taking about five to six times longer than in the unmitigated configuration.

Related Articles