Exam CV0-003 topic 1 question 158 discussion

Simultaneous Multithreading (SMT) (often referred to as Hyper-Threading in Intel processors) allows multiple threads to run on the same CPU core, improving resource utilization and efficiency. This enables VMs to share CPU resources on the same core when feasible, maximizing performance. It is a common technique used in virtualization environments to enhance CPU efficiency without adding physical cores.

Correct Answer: E. Enable simultaneous multithreading. Explanation: Simultaneous Multithreading (SMT), also known as Hyper-Threading in Intel processors, allows multiple threads to run on each CPU core simultaneously. By enabling SMT, the hypervisor can better utilize CPU resources by scheduling multiple virtual CPUs (vCPUs) from different VMs to run on the same physical core when feasible. This enables better CPU resource sharing and improves overall CPU utilization efficiency.

I don't think any of these options are the answer. Some kind of affinity rule would seem to be in order.

Simultaneous Multi-Threading Modern processors can manage more than one processing thread. Doing so may improve performance, depending on the situation. Intel CPUs support the use of a form of simultaneous multi-threading (SMT) named Hyper-Threading.

Answer is Oversubscription. The term refers to the practice of allocating more resources to the VMs than the physical server actually has. Admins might do this based on the anticipated workload for a given set of VMs. i.e. not all VM's are expected to consume their fully allocated resources.

Simultaneous Multithreading (SMT) allows multiple execution threads to be executed on a single physical CPU core. The technology is known by a number of different names, such as Hyper-Threading, but operate along similar principles

The option that would best achieve the goal of allowing VMs on the hypervisor to share CPU resources on the same core when feasible is: E. Enable simultaneous multithreading. Simultaneous multithreading (SMT), also known as hyper-threading, is a technology that allows multiple threads to run concurrently on a single core, providing better CPU utilization and performance. By enabling SMT on the hypervisor, the VMs will be able to share CPU resources more efficiently and effectively, leading to better overall performance.

I have to go with D on this one. Oversubcription would be more for maximization of hardware utilization, and I don't get that from this question.. Again, CompTIA playing games.

This is not recommended in the field (for various reasons), but technically- this would be the solution.

The term multithreading is ambiguous, because not only can multiple threads be executed simultaneously on one CPU core, but also multiple tasks (with different page tables, different task state segments, different protection rings, different I/O permissions, etc.). Although running on the same core, they are completely separated from each other. Multithreading is similar in concept to preemptive multitasking but is implemented at the thread level of execution in modern superscalar processors. I think the answer is correct. D.

I think this should be B.