Similarly, on 8 cores-8 threads, we get 2716.31 events per second, which gives us a +5.50% (or 105.50%) of the 8*1 CPU core performance. VCPU (S) vs. Updated Microsoft's revealed that virtual machines in its Azure cloud will soon be defined by virtual rather than physical cores.. Microsoft says the change “is a key architectural change in our VMs that enables us to unlock the full potential of the latest processors.” The post then names Intel's Broadwell E5-2673 v4 2.3 as the creature that will power some new instance types. On Azure, A Vm core gets for a physical core. 1 Answer1. The vCore counts and available memory for each performance and service tier (for both Gen 4 and Gen 5 CPUs) are detailed in Tables 4 through 7. Nowadays, almost all servers come with two or four cores per physical CPU. Microsoft typically recommends you have no more than eight virtual processors per physical core. The exact number of virtual processors and VMs you run on a server will depend on the workload of the VMs. If you have a large number of VMs that are typically idle, you could run many VMs on a single processor without seeing a performance degradation. A virtual CPU (vCPU) also known as a virtual processor, is a physical central processing unit that is assigned to a virtual machine (VM). From this point of view, desktop CPUs have a great advantage compared to server-class CPUs with many cores, which also have to scale out with multiple cores. Gen 4 CPUs are based on Intel E5-2673 v3 (Haswell) 2.4 GHz processors. We have also improved our local disk random IOPS to be 2-10x faster than that of our existing A version 1 sizes.”. The Lsv2 VMs run on the AMD EPYC™ 7551 processor with an all core boost of 2.55GHZ up to a 3.0GHz single core boost. At minimum, a 64-bit Tableau Server requires a 4-core CPU (the equivalent of 8 Azure vCPUs) and 16 GB RAM. This can vary by as much as 1-2 per core, and up to 8-10 per core based on the average CPU utilisation of applications running on VMs. IIRC it asks for the total of logical CPUs and than for the number of vCores which gives vCPU = vCores * vSocket. 4 DATA SHEET FortiGate-VM on Microsoft Azure SPECIFICATIONS VM-01/01V/01S VM-02/02V/02S VM-04/04V/04S System Requirement vCPU (Minimum / Maximum) 1 / 1 1 / 2 1 / 4 Hi, thank you a lot. On average, you should see four to six vCPUs per physical core. In Gen 4, 1 vCore = 1 physical CPU whereas Gen 5 logical CPUs are based on Intel E5-2673 v4 (Broadwell) 2.3 GHz processors. So they won't know how many sockets you have, all of their numbers are "per socket." Delivering many virtual timer interrupts negatively impacts virtual machine performance and increases host CPU consumption. It is by far the most developed cloud providers in IaaS, PaaS and even SaaS (Office 365) that you can get. My basic math for highest performance is a total of 6 vCPU to 1 pCPU, not including HT cores. Later in target selection you use cores. The first tier is the Total Regional vCPUs, and the second tier is the various VM size family cores such as the D-series vCPUs. With v3 the cores a virtual and called vCPU like Amazon and Google. Per Azure subscription the default quota for virtual machine CPU cores is 20. vCPU, in theory, should be slower vs CPU but this really depends on your app and how it can parallel the work. DTU = Unit of measurement for compute processing power. In other words, for every physical logical processor, we’d get support for up to 12 virtual CPUs. If you know the thread cound of your system is higher, then you get more vCPU. Each core very safely support 8 virtual processors (vCPUs). vCPU does not represent one to one allocation. It represents time on the physical CPU resource pool. Now, let's go through some technical terms first: Some operating systems will have a maximum on number of vCPUs. An Example. A single-instance represents an S1 architecture in SVA: 12 physical CPU cores, or 24 vCPU at 2Ghz or greater speed per core. In this example, to specify the default CPU core count for an r4.4xlarge instance, choose 8. Intel only looks at the world from the CPU level. d) Low IO requirements. Each vCPU is a thread of a CPU core, except for T2 instances and instances powered by AWS Graviton2 processors. Just trying to understand if in data collection avg cpu count (4) is referring to 4 cpu sockets and not caring about how many cores/socket. If you plan to follow along, ensure you have the following in place before following this step by step tutorial: A Windows Hyper-V host – This tutorial uses a physical Windows 2016 server with the Hyper-V role installed equipped with 8GB of RAM and a dual-core i7 (2ghz) processor. I expected to see sockets and cores per socket. In Gen 5, 1 vCore = 1 hyper thread. In most of the cases, the cluster usually requires more than one nodes, and each node may have at least 4 cores to run (the recommended worker VM is DS3_v2 which has 4 vCores). With hyperthreading disabled (or enabled in this case) this VM never runs on more than 1 physical CPU. Moreover, you will most likely use some large ones as well. On a physical server running SQL Server, all the cores on the server must be licensed for SQL, even if that is more CPU capacity than your SQL instance requires. So that server is simply 1 CPU with 6 cores. In my KVM virtual machine running Windows 10, all assigned virtual cores are considered as separate processors. So enter 8 at the first step and than 4 or the other way around. In Data Collection section, are you referring to 4 cpu sockets and not taking core count into consideration? I'm not super familiar with Azure terminology but I suspect it's the same as in AWS: "Core" sounds like a real physical CPU core while "vCPU" typically refers to 1 thread in hyperthreading-enabled . It lists the exact name and frequency of your CPU alongside the number of cores and logical processors on it. Then finally the black box where you can configure the core count and data storage capacity independently. In this new version of our A-Series VM’s we have raised the amount of RAM per This equates to 12 cores, which is what we wanted, but this violated the limit of 4 sockets, so SQL Server standard edition only recognized 4. 2. Gen 5 uses the newer Intel Xeon E5-2673 v4, which has 20 physical cores, with a base clock speed of 2.3 GHz and a Turbo clock speed of 3.5 GHz and a 50 MB L3 cache. More information F-16 VM CPU refer to this link. 05-09-2019 04:15 PM. We can license SQL Server by pCPU. So, that would be 12 pCPU times 6, totalling 72 per host. CPUs. If the application is not multi-threaded and peak CPU demand is below 3000MHz, provision a single vCPU. For example, an Esv3 series Type 1 Azure Dedicated Host has 32 available physical cores and a vCPU:core ratio equal to 2 and can host up to 64 vCPUs. The number of cores and threads of an Intel processor can be found in the Intel's Technical Specifications website by searching by processor number. Start your Azure free account and get 12 months free access to Virtual Machines plus $200 credit for 30 days. More information please refer to this link. But does not double the throughput as it does double the number of CPU threads of the host. A general estimation is that 1 vCPU = 1 Physical CPU Core. Managing Virtual Core & vCPU in KVM. How many VMs can run on a server? (threads x cores) x physical CPU = actual vCPU. a CPU is a real physical thing. vCPU is a marketing term used to describe part of a CPU (normally a core or a thread in the case of hyperthreaded CPUs). Generally, VPS hosts around here mean vCPUs. There are some (like AbusiveCores) that allocate a whole core to you, and you can use it around the clock. So let’s compare this to … Apparently, the first part is the CPU number. 1) 12:1 ratio The 12:1 ratio applies only to when you are dealing with VDI. However, a total of 8 CPU cores (8 Azure vCPUs) and 64GB RAM are strongly recommended for a single production Microsoft Azure VM. Meaning of memory In Gen 4, 1 vCore = 1 physical CPU whereas Gen 5 logical CPUs are based on Intel E5-2673 v4 (Broadwell) 2.3 GHz processors. A core is a physical unit of a CPU. 2. The vCPU count can be constrained to one half or one quarter of the original VM size. We love Microsoft Azure. Currently, there are two CPU types on Microsoft Azure cloud to choose from: Gen4: Intel E5-2673 v3 (Haswell) 2,4 GHz, 1 virtual core = 1 physical core, Gen5: Intel E5-2673 v4 (Broadwell) 2,3 GHz, 1 virtual core = 1 hyper-thread. Does it make any difference for the performance of the applications inside if the OS thinks it has 4 sockets and 2 cores per socket or 1 socket with 8 cores? However, a total of 8 CPU cores (16 Azure vCPUs) and 64GB RAM are strongly recommended for a single production Microsoft Azure VM. Dv2 Series Announcement. Windows Azure compute cores and you. By default, every Windows Azure subscription has a limit of 20 compute cores. This applies to both VMs (IaaS) and worker roles (PaaS). . The number of vCPU cores is limited to 10, which also limited the ability of Azure Databricks. For more details, you can refer to these msdn answers: this and this. If you want to assign more than 128 virtual processors, configure a VM to use multicore processors. However, this is not entirely correct, as the vCPU is made up of time slots across all available physical cores, so in general 1vCPU is actually … Hyper-Threading Gotcha with Virtual Machine vCPU Sizing. Bottom line, you are using a shared plan: the cores and RAM are shared - you have no guarantee to access. Next I spun-up an m3.large and run CPU-Z. Azure Virtual Machines gives you the flexibility of virtualisation for a wide range of computing solutions with support for Linux, Windows Server, SQL Server, Oracle, IBM, SAP and more. For all others, 1 vCPU = 1 logical core. Microsoft only tested the 12:1 ratio in a VDI scenario. Today, vCPU count is largely determined by the manufacturer. 4 vCPUs = 4 logical processors. The maximum number of processor cores that can be assigned to a single VM is 768 in vSphere 7.0 Update 1. In other words, for T2 instances, 1 vCPU = 1 physical core. Managing Virtual Core & vCPU in KVM. edited Jun 11 '20 at 10:02. I don't know why 2012 R2 would need more for that size shop. In my KVM virtual machine running Windows 10, all assigned virtual cores are considered as separate processors. As default, every customer in Azure gets twenty CPU cores. “Each vCPU is a hyper-thread of an Intel Xeon core except for T2.”. If you are unfamiliar with the terms sevice tiers, performance levels, and DTUs, see Azure SQL Database Service Tiers and Performance Levels for more information. CPU hot add. A good rule of thumb is that four single CPU VMs can be supported per CPU core. “Gen4” and “Gen5” are just the MS Azure labels for two distinct CPU types. level 1. crymson7. A virtual CPU (vCPU) also known as a virtual processor, is a physical central processing unit (CPU) that is assigned to a virtual machine (VM). That gives you ten VM’s in total. Hi, thank you a lot. Google doesn’t disclose any details of what kind of SKU they are testing, however we do have 64-core and 32-core vCPU data on Graviton2, scoring … Share. For example, if you need to configure a VM to use 2-processor sockets, each has 2 CPU cores, then the total number of logical CPUs is 2*2=4. Take a 4 vCPU VM running on a host with 2 * quad core CPUs. CPU, memory, physical reads, and transaction log writes (IOPS) 2. ... additional cost for 1 … Later in target selection you use cores. This can lead to significant performance differences when it comes to multi-threaded, burst CPU usage. A VM can only run on one node. Clients I work with continually misconfigure cores per socket. Sufficient VM core (vCPU) quotas for your clusters. The second is for cores. DTUs with different service tiers allow comparison of resources that power different Database performance levels See the screenshot below… The number of cores and threads of an Intel processor can be found in the Intel's Technical Specifications website by searching by processor number. To properly size the vCPU for a VM, look at the performance metrics of the workload. The Lsv2 series VMs offer up to 80 vCPUs in a hyper-threaded configuration, with 8 GiB of memory per vCPU and … A complimentary workload would have one or more of the following qualities: a) Less than 96GB RAM (Host RAM 256GB, minus SQL VM 128GB, minus CVM 32GB = 96GB remaining) b) vCPU requirements <= 2 (This would mean a 1:1 vCPU:pCore ratio) c) Low vCPU requirements and/or utilization. Each vCPU is a thread of either an Intel Xeon core or an AMD EPYC core, except for M6g instances, A1 instances, T2 instances, and m3.medium. F-Series VMs are based on the 2.4 GHz Intel Xeon® E5-2673 v3 (Haswell) processor, which can achieve clock speeds as high as 3.1 GHz with the Intel Turbo Boost Technology 2.0. Windows Virtual Machines Pricing. Reference host specification for single-instance deployments. DTU and vCores are two different purchasing model for Azure SQL where you can get computation, memory, storage, and IO in different ways. Top 10 Best Practices Recommendations: If possible, start with one vCPU per VM and increase as needed. More information F … In Gen 5, 1 vCore = 1 hyper thread. Hyperthreading on bare-metal server improves the overall throughput. It’s important to understand the distinction between a processing thread and Then finally the black box where you can configure the core count and data storage capacity independently. This new size is the Standard_D15_v2 with the following specifications: 20 CPU cores, 140 GB of memory, 1,000 GB of temporary solid-state drive (SSD), up to 8 virtual network interface cards (NICs), up to 40 data disks, and very high network bandwidth. A general estimation is that 1 vCPU = 1 Physical CPU Core. 1 vCPU – requests are processed quickly Multiple vCPU’s – The hypervisor CPU schedular must wait for physical CPU’s to become available Over allocation (commitment) could result in poor performance. 9 months ago. The Math Behind Calculating vCPU. Tanzu Kubernetes Grid clusters require 2 vCPU per node, which translates to: Management cluster: dev plan: 4 vCPU (1 main, 1 worker) If it is a cluster of the same host type, 72 times the nimber of hosts. Open Task Manager, then select the Performance tab to see how many cores and logical processors your PC has. Example in my azure virutal machine having 1 Vcpu how can i get this 1 vcpu have how many cores. In most of the cases, the cluster usually requires more than one nodes, and each node may have at least 4 cores to run (the recommended worker VM is DS3_v2 which has 4 vCores). Is vCPU same as core or thread? The vCPU quotas for virtual machines and virtual machine scale sets are arranged in two tiers for each subscription, in each region. Save it for VM's that need it. With that a single vCPU in an Azure VM is mapped into one of the two CPU threads of a hyperthreaded core on the host server. A virtual machine cannot use more CPU cores than the number of logical processor cores on a physical machine. For this reason, the form 100m might be preferred. single core) based but the trend has been significantly changed in new operating systems and applications. The number of CPU cores that can be provisioned in a subscription in total and per VM family are limited. Each vCPU on A1 instances is a core of an AWS Graviton Processor. Microsoft noticed "some confusion" about the 12:1 ratio. In reality the vCPU count is determined by the manufacturer - it is the number of processing threads that chipset offers per core. Lower and you get less. Gen 4 CPUs are based on Intel E5-2673 v3 (Haswell) 2.4 GHz processors. If you need a guarantee to the number of cores available, scale up to a Basic or Standard plan. As Kendrick Coleman shows in his post on vCPU for License Trickery, you can use the CPU-Z utility to find out how many sockets and cores your virtual machine has. Google "azure d1 shared plan" - or look at Azure App Service Pricing. I suggest reading this cool article about vCPU configuration written by Frank Denneman (Chief Technologist at VMWare). Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2). For instance, a free subscription has an overall core quota of 4. Azure Virtual machine Core VS VCPU. The rule of thumb when allocating CPU’s to a Virtual Machine (Best Practise) is to allocate 1 vCPU and then test the CPU utilisation. What is difference between vCPU and core? To explain this further let’s take an example of a four pCPU host that has four VMs, three with 1 vCPU and one with 4 vCPUs. A standard Azure account has a quota of 10 vCPU per region. On a VM, you only need to license the logical CPUs allocated to the VM, with a minimum of 4 license units. However, this is not entirely correct, as the vCPU is made up of time slots across all available physical cores, so in general 1vCPU is actually more powerful than a single core, especially if the physical CPUs have 8 cores. Each vCPU on T4g and M6g instances is a core of the AWS Graviton2 processor. On Azure, A Vm core gets for a physical core. If for example, we ask them to provide a VM with 4 total CPUs, they will add 4 cores each with 1 socket. 05-09-2019 04:15 PM. So if it never runs on 1 pCPU then we can buy just 1 copy of SQL Server per proc. To prevent accidental or malicious use of Azure where many VMs are created and a large amount of consumption occurs, Microsoft imposes core quotas on subscriptions by default. Many database workloads are not CPU-intensive. (becuase that was the common number when most guidance was written). CPU-Z results for an Amazon EC2 m3.large. In most cases, there is an Amazon EC2 instance type that has a combination of memory and number of vCPUs to suit your workloads. Save the configuration file and start the virtual machine. Find out how many cores your processor has, using System Information. The math is rather straight forward. 1. CPU is always requested as an absolute quantity, never as a relative quantity; 0.1 is the same amount of CPU on a single-core, dual-core, or 48-core machine. However, a total of 8 CPU cores (16 Azure vCPUs) and 64GB RAM are strongly recommended for a single production Microsoft Azure VM. Check out this brief video about vCPUs, CPUs and Virtual Machines. It is well thought out from an administration point of view, strong API to control most aspects of it, and offers as many developer-oriented services as you can imagine. Many has pointed out that the single vCPU mind-set is obsolete and we can always debate on this because the older operating systems being uni-processor (i.e. CPU-Z results for an Amazon EC2 m1.large instance. We recommend that you choose an instance that supports Azure premium storage (Link opens in a new window). Just trying to understand if in data collection avg cpu count (4) is referring to 4 cpu sockets and not caring about how many cores/socket. We have to ask that they reconfigure to use 1 core with 4 sockets. 1 Core Processor 60 GB SSD Disk 3 TB Transfer* $20 USD/mo 4 GB Memory 2 Core Processor 80 GB SSD Disk 4 TB Transfer* $40 USD/mo ... vCPU: 1 RAM: 2GB $80 USD/mo Large. So, in this case, wouldn't it make more sense to let a VM with 4 CPUs run on 1 VCPU and 4 Cores, instead of 4 VCPUs with 1 core, as each node has only 1 CPU socket? 1. AWS EC2 default instance – m5.12xlarge – 24 cores, two threads per core – 48 vCPU. The conservative estimate is 1 core has 8 threads. The second is for cores. Before v3 Azure did't have any HT, therefore, all cores were physical and called CPUs. Measured in (DTUs) or Database Throughput Units 2. See Optimizing CPU Options: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-optimize-cpu.html. By default, virtual machines are allocated one vCPU each. This represents the minimum basic instance specifications for a production grade Splunk Enterprise deployment. My experience is that most of the small computers still needs to be run as “Medium” you will then use two cores. Prerequisites. To use all CPU resources allocated to a virtual machine, it must see one 8 core processor, 2 vCPUs with 4 cores each or 1 vCPU with 4 cores in two threads instead of 8 vCPUs. Most Azure VMs available on Azure Dedicated Hosts offer a vCPU:core ratio equal to 2. We recommend that you choose an instance that supports Azure premium storage (Link opens in a new window). Occasionally, the voodoo is abused when sizing the quantity of virtual machine vCPUs for a workload. vCPU: 2 RAM: 4GB $160 USD/mo XLarge. If a VM has 128 vCPUs or less than 128 vCPUs, then you cannot use the CPU hot add feature for … So when they 6 Cores, they mean "Six Cores … More information please refer to this link. Ah … but all was not as it seems, as a blog post that appeared in my feeds … Continue reading "Microsoft Corrects The vCPU:pCPU Ratio for Hyper-V" 3. If you haven't determined an initial service tier based on feature capability, we recommend you visit Upgrade SQL Database Web or Business Databases to New Service Tiers for guidance before using this calculator. Share. Core licensing: The fine print. She primarily focuses on the database domain, helping clients build short and long term multi-channel campaigns to drive leads for their sales pipeline. Okay we’ve got: An Xeon E5-2650 running at a detected 1.8 Ghz. Hi All, Please suggest how many CPU cores having Vcpu in the Azure virtual machine? At minimum, a 64-bit Tableau Server requires a 4-core CPU (the equivalent of 8 Azure vCPUs) and 16 GB RAM. let's assume we have one Nutanix block with 3 nodes. At best only the three single vCPU VMs can be … And of course times the number of occupied sockets. In the past, there was a rule of thumb that there were eight vCPUs per core. When installing Tableau Server on a supported cloud platform, such as AWS (Amazon Web Services), Azure, or GCP (Google Cloud Platform), the number of virtual CPUs (vCPU) will not always directly correspond to the number of cores that Tableau Server detects for licensing purposes. In Azure, where you see the number of vCPU cores listed against a particular Virtual Machine size this represents the number of logical cores. IIRC it asks for the total of logical CPUs and than for the number of vCores which gives vCPU = vCores * vSocket. The System Information app offers another quick way to find the number of cores and logical processors found on your CPU.Launch it and, in the System Summary section, look for the Processor line. Task Manager showing CPU statistics of a server. It comprises of the following: 1. Azure offers certain VM sizes where you can constrain the VM vCPU count to reduce the cost of software licensing, while maintaining the same memory, storage, and I/O bandwidth. See Permissions required for registering an app in the Azure documentation. So enter 8 at the first step and than 4 or the other way around. The maximum number of virtual processor sockets assigned to a VM is 128. It’s calculated by taking the number of processing threads that a chipset offers per core and multiplying the number of occupied sockets. In each node we only have 1 CPU socket with 10 Cores. 1 CPU core with 2 threads. Looking into this, we noticed that our automated VM build put the "Number of virtual sockets" equal to the number of total CPUs (12 in our case) and put "Number of cores per socket" equal to 1. F-Series VMs are based on the 2.4 GHz Intel Xeon® E5-2673 v3 (Haswell) processor, which can achieve clock speeds as high as 3.1 GHz with the Intel Turbo Boost Technology 2.0. Answers. 1. Some operating systems will have a maximum on number of vCPUs. It is recommended to start with 1:1 vCPU-to-pCPU ratio, and then scale up the number of vCPUs while assessing performance. If your main focus is on raw performance, then an i7-4790K at 4.00 GHz would be much better (same test running in 5 seconds), but you need to balance different requirements on a server. To clarify because the relationship between virtual and physical CPU cores can get a little confusing. To calculate the number of logical CPUs in vSphere Client, multiply the number of sockets by the number of cores. An on-site setup – 12 ‘threads’ provisioned by 6 x86 intel hyperthreaded cores – eg a 1 socket HP DL390 Gen 9 running an E5-2643 v3 chip. 2. Number Of Cores Per vCPU. There are two issues. Hyper-Threading ( HT) is sometimes viewed as the mystical voodoo that enables you to have twice as many logical cores on your physical CPU. Apparently, the first part is the CPU number. Active Oldest Votes. Last year, those of us not at TechEd USA heard that Microsoft would support a 12:1 ratio of virtual CPUs. A request with a decimal point, like 0.1, is converted to 100m by the API, and precision finer than 1m is not allowed. An ASE is a powerful feature offering of Azure App Service that gives network isolation and improved scale capabilities. It is recommended to start with 1:1 vCPU-to-pCPU ratio, and then scale up the number of vCPUs while assessing performance. If every VM has one more vCPU than it needs, you are only getting two to three vCPUs per core. To disable multithreading, for Threads per core, choose 1. This initial limit is directly related to what you see in the Azure portal when sizing your VM during creation. The performance levels of DTUs are measured using the following metric: 1. Some processors report the threads as Logical Processors. vCPU: 4 RAM: 8GB * Each container service includes a data transfer quota of 500 GB per month. How many cores do you need to license? Creating new computers will quickly need more than this. Divvy that up for the VMs and you should be good. Nupur Dave is a social media enthusiast and an independent consultant. host-passthrough is the emulation mode in which the virtual machine sees the physical processor of the cluster node sockets=’1′ indicates that there is one vCPU (socket) cores=’4′ the processor has 4 cores per socket threads=’2′ ieach core has 2 threads. My 2008 R2 DC VM's have been the same, 1 core and 4GB, and they're completely idle. You basically want to give it just what it needs, there's no reason to throw dual quad core vCPU's at it just because the host could do it. Here we have: Xeon E5-2670 v2 running at a detected 2.5 Ghz. For Core count, choose the number of required CPU cores. To use all CPU resources allocated to a virtual machine, it must see one 8 core processor, 2 vCPUs with 4 cores each or 1 vCPU with 4 cores in two threads instead of 8 vCPUs. This service plan enables consumers to run their applications in private, dedicated environments in Azure datacenter using Dv2-series VMs, which is … So for Hyper-threading enabled Virtual Machines such as the D_v3 and E_v3 series a size listed with 8 vCPUs such as the D8_v3 size has got 8 logical CPU cores/threads but actually only has 4 virtual CPU cores. It seems that the default setting for … The number of vCPU cores is limited to 10, which also limited the ability of Azure Databricks. In the example below on a high-end Virtual Machine there are 16 sockets with 1 core each, 16 x 1 = 16 virtual CPU’s. If you have a choice, use guest operating systems that require fewer timer interrupts. In this new version of our A-Series VM’s we have raised the amount of RAM per vCPU from 1.75 GiB or 7 GiB of RAM per vCPU to 2 GiB or 8 GiB per vCPU. In Data Collection section, are you referring to 4 cpu sockets and not taking core count into consideration? Therefore 1 core gives 8 vCPU. 2 CPU cores with 1 thread each. In other words, the virtual CPUs must be in Windows 7 virtual machines on a host running W2008 R2 SP1.