Performance By Design

CPU Priority scheduling options. In a final set of benchmark results on Guest machine performance when the physical CPUs on the Hyper-V Host are over-committed, we will look now at how effective the Hyper-V processor scheduling priority settings are at insulating preferred guest machines from the performance impact of an under-provisioned (or over-committed) Hyper-V Host machine. The results of two test scenarios where CPU Priority scheduling options were used are compared to the over-committed baseline (and the original native Windows baseline) are reported in the following table: Configuration # guest machines CPUs per machine Best case elapsed time stretch factor Native machine … 4 90 … 4 Guest machines (no priority) 4 2 370 4.08 4 Guests using Relative Weights 4 2 230 2.56 4 Guest using Reservations 4 2 270 3.00 Table