Hyperthreading is turned off on m7a/c7a/r7a. "One of the major differences between M7a instances and the previous generations of instances, such as M6a instanc

Hyperthreading is turned off on m7a/c7a/r7a. "One of the major differences between M7a instances and the previous generations of instances, such as M6a instances, is their vCPU to physical processor core mapping. Every vCPU on a M7a instance is a physical CPU core. This means there is no Simultaneous Multi-Threading (SMT). By contrast, every vCPU on prior generations such as M6a instances is a thread of a CPU core." https://aws.amazon.com/ec2/instance-types/m7a/ https://aws.amazon.com/ec2/instance-types/m7a/