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Linux
Windows
En este documento, se describe cómo ver la cantidad de núcleos de CPU visibles de una instancia de máquina virtual (VM).
Cuando consultas los detalles de una VM, puedes verificar si tiene la cantidad predeterminada de núcleos de CPU visibles o si esta cantidad se personalizó. Reducir la cantidad de núcleos de CPU visibles para una VM puede ayudar a reducir los costos de licencias sin reducir los límites de rendimiento del Persistent Disk.
Sin embargo, reducir la cantidad de núcleos de CPU visibles podría afectar el rendimiento de la red.
Antes de comenzar
Si aún no lo hiciste, configura la autenticación.
La autenticación verifica tu identidad para acceder a los Google Cloud servicios y las APIs. Para ejecutar código o muestras desde un entorno de desarrollo local, puedes autenticarte en Compute Engine seleccionando una de las siguientes opciones:
Select the tab for how you plan to use the samples on this page:
Console
When you use the Google Cloud console to access Google Cloud services and
APIs, you don't need to set up authentication.
gcloud
Instala Google Cloud CLI.
Después de la instalación,
inicializa Google Cloud CLI ejecutando el siguiente comando:
[[["Fácil de comprender","easyToUnderstand","thumb-up"],["Resolvió mi problema","solvedMyProblem","thumb-up"],["Otro","otherUp","thumb-up"]],[["Difícil de entender","hardToUnderstand","thumb-down"],["Información o código de muestra incorrectos","incorrectInformationOrSampleCode","thumb-down"],["Faltan la información o los ejemplos que necesito","missingTheInformationSamplesINeed","thumb-down"],["Problema de traducción","translationIssue","thumb-down"],["Otro","otherDown","thumb-down"]],["Última actualización: 2025-09-04 (UTC)"],[[["\u003cp\u003eThis document provides instructions on how to check if a virtual machine (VM) has the default number of visible CPU cores or if it has been customized.\u003c/p\u003e\n"],["\u003cp\u003eReducing the number of visible CPU cores can help decrease licensing costs, but it might impact network performance and overall VM performance.\u003c/p\u003e\n"],["\u003cp\u003eYou can view the number of visible CPU cores through the Google Cloud console, by using the \u003ccode\u003egcloud compute instances describe\u003c/code\u003e command, or by making a \u003ccode\u003eGET\u003c/code\u003e request to the \u003ccode\u003einstances.get\u003c/code\u003e method.\u003c/p\u003e\n"],["\u003cp\u003eIf the \u003ccode\u003evisibleCoreCount\u003c/code\u003e field is present in the output, the VM has a customized number of visible CPU cores; otherwise, it has the default number.\u003c/p\u003e\n"],["\u003cp\u003eTo view the details of the VM, the required permission is \u003ccode\u003ecompute.instances.get\u003c/code\u003e, granted by the \u003ccode\u003eCompute Instance Admin (v1)\u003c/code\u003e role.\u003c/p\u003e\n"]]],[],null,["# View the number of visible CPU cores\n\nLinux Windows\n\n*** ** * ** ***\n\nThis document describes how to view the number of visible CPU cores for a\nvirtual machine (VM) instance.\n\nWhen you\n[view the details of a VM](/compute/docs/instances/view-vm-details), you\ncan verify if the VM has the default number of visible CPU cores, or if this\nnumber has been customized. Reducing the number of visible CPU cores for a VM\ncan help reduce licensing costs without reducing Persistent Disk performance limits.\nHowever, reducing the number of visible CPU cores might affect network\nperformance.\n| **Note:** Reducing the number of visible CPU cores for a VM might impact the performance of the VM. For more information, see [Performance considerations](/compute/docs/instances/customize-visible-cores#performance_considerations).\n\nBefore you begin\n----------------\n\n- If you haven't already, set up [authentication](/compute/docs/authentication). Authentication verifies your identity for access to Google Cloud services and APIs. To run code or samples from a local development environment, you can authenticate to Compute Engine by selecting one of the following options:\n\n Select the tab for how you plan to use the samples on this page: \n\n ### Console\n\n\n When you use the Google Cloud console to access Google Cloud services and\n APIs, you don't need to set up authentication.\n\n ### gcloud\n\n 1.\n [Install](/sdk/docs/install) the Google Cloud CLI.\n\n After installation,\n [initialize](/sdk/docs/initializing) the Google Cloud CLI by running the following command:\n\n ```bash\n gcloud init\n ```\n\n\n If you're using an external identity provider (IdP), you must first\n [sign in to the gcloud CLI with your federated identity](/iam/docs/workforce-log-in-gcloud).\n | **Note:** If you installed the gcloud CLI previously, make sure you have the latest version by running `gcloud components update`.\n 2. [Set a default region and zone](/compute/docs/gcloud-compute#set_default_zone_and_region_in_your_local_client).\n\n ### REST\n\n\n To use the REST API samples on this page in a local development environment, you use the\n credentials you provide to the gcloud CLI.\n 1. [Install](/sdk/docs/install) the Google Cloud CLI. After installation, [initialize](/sdk/docs/initializing) the Google Cloud CLI by running the following command: \n\n ```bash\n gcloud init\n ```\n 2. If you're using an external identity provider (IdP), you must first [sign in to the gcloud CLI with your federated identity](/iam/docs/workforce-log-in-gcloud).\n\n\n For more information, see\n [Authenticate for using REST](/docs/authentication/rest)\n in the Google Cloud authentication documentation.\n\n### Required roles\n\n\nTo get the permission that\nyou need to view the details of a VM,\n\nask your administrator to grant you the\n\n\n[Compute Instance Admin (v1)](/iam/docs/roles-permissions/compute#compute.instanceAdmin.v1) (`roles/compute.instanceAdmin.v1`)\nIAM role on the VM or project.\n\n\nFor more information about granting roles, see [Manage access to projects, folders, and organizations](/iam/docs/granting-changing-revoking-access).\n\n\nThis predefined role contains the\n` compute.instances.get`\npermission,\nwhich is required to\nview the details of a VM.\n\n\nYou might also be able to get\nthis permission\nwith [custom roles](/iam/docs/creating-custom-roles) or\nother [predefined roles](/iam/docs/roles-overview#predefined).\n\nView the number of visible CPU cores for a VM\n---------------------------------------------\n\nTo determine if the number of visible CPU cores was customized for a VM, select\none of the following options: \n\n### Console\n\n1. In the Google Cloud console, go to the **VM instances** page.\n\n [Go to VM instances](https://console.cloud.google.com/compute/instances)\n2. In the **Name** column, click the name of\n the VM.\n\n The details page of the VM opens and the **Details** tab is selected.\n3. In the **Machine configuration** section, check the value for\n **Custom visible cores** . If there is no value displayed, then the VM\n has the\n [default number of visible CPU cores](/compute/docs/instances/customize-visible-cores).\n\n### gcloud\n\nTo view the details of the VM, use the\n[`gcloud compute instances describe` command](/sdk/gcloud/reference/compute/instances/describe). \n\n gcloud compute instances describe \u003cvar translate=\"no\"\u003eVM_NAME\u003c/var\u003e \\\n --zone=\u003cvar translate=\"no\"\u003eZONE\u003c/var\u003e\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003eVM_NAME\u003c/var\u003e: the name of the VM.\n\n- \u003cvar translate=\"no\"\u003eZONE\u003c/var\u003e: the zone where the VM is located.\n\nIf the number of visible CPU cores for the VM was customized, then\nthe output contains the `visibleCoreCount` field as follows: \n\n advancedMachineFeatures:\n visibleCoreCount: \u003cvar translate=\"no\"\u003eVISIBLE_CORE_COUNT\u003c/var\u003e\n ...\n\nIf the output doesn't contain the `visibleCoreCount` field, then\nthe VM has the\n[default number of visible CPU cores](/compute/docs/instances/customize-visible-cores).\n\n### REST\n\nTo view the details of the VM, make a `GET` request to the\n[`instances.get` method](/compute/docs/reference/rest/v1/instances/get). \n\n GET https://compute.googleapis.com/compute/v1/projects/\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e/zones/\u003cvar translate=\"no\"\u003eZONE\u003c/var\u003e/instances/\u003cvar translate=\"no\"\u003eVM_NAME\u003c/var\u003e\n\nReplace the following:\n\n- \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e: the ID of the project where the VM is\n located.\n\n- \u003cvar translate=\"no\"\u003eZONE\u003c/var\u003e: the zone where the VM is located.\n\n- \u003cvar translate=\"no\"\u003eVM_NAME\u003c/var\u003e: the name of the VM.\n\nIf the number of visible CPU cores for the VM was customized, then\nthe output contains the `visibleCoreCount` field as follows: \n\n {\n ...\n \"advancedMachineFeatures\": {\n visibleCoreCount: \u003cvar translate=\"no\"\u003eVISIBLE_CORE_COUNT\u003c/var\u003e\n },\n ...\n }\n\nIf the output doesn't contain the `visibleCoreCount` field, then\nthe VM has the\n[default number of visible CPU cores](/compute/docs/instances/customize-visible-cores).\n\nWhat's next\n-----------\n\n- [Customize the number of visible cores](/compute/docs/instances/customize-visible-cores)\n- [Set the number of threads per core](/compute/docs/instances/set-threads-per-core)"]]