Number of cores per dedicated host and Proc model

Question

Hello,

My question is about the number of physical cores per dedicated host.

A dedicated host for Dsv3_Type2 based on the Intel Xeon Platinum 8171M (Skylake) has 72 available vCPUs and 48 physical cores.

However, the Intel Xeon Platinum 8171M (Skylake) comes with 26 CPU cores and 52 threads (http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%208171M.html).
(the same differences can be observed for every dedicated host when comparing the number of physical cores of the host and the number of CPU cores for the processors).

• Where does those differences comes from?
• What is the correct Core count to consider for the dedicated host?
• What is the correct Core count to consider for the Intel Xeon Platinum 8171M (Skylake)?
• Is Hyper-threading enabled on the dedicated hosts processors?

Answer 1

The correct core count is the one shown in the Azure documentation. The actual core count of the physical CPU is not relevant. Dedicated VM's are guaranteed to be dedicated to you and have no-one else using them, this does not mean you get access to all of the physical hardware. The machine will have some cores and memory allocated to running the hypervisor and Azure services that you will not see.

The Dv3 series do have Hyperthreading enabled.