Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
9,033 questions
[AZURE] What VM has one CPU socket and multiple (max possible) threads?
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Igon Skrzypek
0
Reputation points
Hello,
I'm looking for a VM on Azure that has 1 vCPU "socket" and as many as possible CPU cores / threads (so in Windows Server it is one group of CPU with a lot of "threads").
Something like physical AMD processors that have many cores but single "socket".
Application I need to run works only on multi threads / cores (> 24 threads / cores) on one CPU socket so VMs with multiple "sockets" work on 50% or less efficiency.
Can you please tell me which VM type should I use?
All the best,
Igon
Azure Virtual Machines
Azure
Azure
A cloud computing platform and infrastructure for building, deploying and managing applications and services through a worldwide network of Microsoft-managed datacenters.
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Navanath Yenpure 155 Reputation points2024-05-13T13:15:19.1166667+00:00 In Microsoft Azure, the virtual machine (VM) that offers one CPU socket with multiple threads is typically categorized as a "virtual machine with Intel Hyper-Threading Technology" or "AMD Simultaneous Multithreading (SMT)" enabled. These VMs leverage the simultaneous multithreading (SMT) technology provided by the underlying CPU architecture to present multiple logical processors per physical core.
Here are some Azure VM series that offer this configuration:
Azure Dv2 and Dsv2 Series: These VMs are designed for general-purpose workloads and include variants with Hyper-Threading enabled, allowing for multiple threads per core.
Azure Ev3 and Esv3 Series: These VMs offer a balance of CPU, memory, and temporary storage for applications that demand higher compute power.
Azure F Series: These VMs are designed for compute-intensive workloads and offer variants with SMT enabled.
Azure H Series: These VMs are optimized for high-performance computing (HPC) scenarios and offer variants with SMT enabled.
Azure M Series: These VMs are optimized for large in-memory applications and offer variants with SMT enabled.
Azure Ls Series: These VMs are designed for low-latency, high-IOPS workloads, and offer variants with SMT enabled.
Each series offers different VM sizes with varying numbers of vCPUs and memory configurations. You can choose the appropriate VM size based on your specific workload requirements, considering factors such as CPU performance, memory, storage, and network bandwidth.
When provisioning a VM in Azure, you can typically select the desired VM size based on your requirements, including the number of vCPUs and memory size. Ensure to check the specifications of each VM size to confirm the number of CPU sockets and the presence of SMT or Hyper-Threading technology.
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Sina Salam 22,031 Reputation points Volunteer Moderator2024-05-13T15:50:53.9633333+00:00 Hi
Thank you for reaching out.
Just a comment:
You might need to refine your need.
Reason was, Azure does not explicitly provide the socket configuration or the threads per core for their VMs. A general estimation is that 1 vCPU = 1 Physical CPU Core.
For applications that are sensitive to the number of sockets, cores, or threads, it’s recommended to conduct performance testing to ensure the selected VM size meets the application’s requirements.
In a live scenario in Azure, a vCPU is a unit of measurement that represents a single virtual CPU core or thread. When talk about an Azure VM with 24 threads available for processing, any Azure VM size that offers 24 vCPUs and above would meet your requirement.
For example: an E2s v3 instance with 2 vCPUs would have 2 threads available for processing.
Let me know if you have more redefined question or this meet your need.
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