In this section, we give the detailed instructions for enabling a GPU device in passthrough mode on a vSphere host server. vSphere Host Server Setup for Direct Use of a GPU You can find a description of this mode of operation hereġ. NOTE: A single virtual machine can make use of multiple physical GPUs in passthrough mode. The vSphere features of vMotion, Distributed Resource Scheduling (DRS) and Snapshots are not allowed with this form of using GPUs with a virtual machine. When using passthrough mode, each GPU device is dedicated to that VM and there is no sharing of GPUs amongst the VMs on a server. you need to replicate a public cloud instance of an application, but using a private cloud setup.Īn important point to note is that the passthrough option for GPUs works without any third-party software driver being loaded into the ESXi hypervisor. there is no need for sharing the GPU among different VMs, because a single application will consume one or more full GPUs (Methods for sharing GPUs will be covered in other blogs) you are taking your first steps to exposing GPUs in virtual machines so as to move the end users away from storing their data and executing workloads on physical workstations The main reasons for using the passthrough approach to exposing GPUs on vSphere are: For more information on VMware’s extensive performance testing of GPUs on vSphere, check here This provides a level of performance of a GPU on vSphere that is very close to its performance on a native system (within 4-5%). The VMDirectPath I/O mode of operation allows the GPU device to be accessed directly by the guest operating system, bypassing the ESXi hypervisor. Further articles in the series will describe other methods for GPU use.įigure 1: An outline architecture of VMDirectPath I/O mode for GPU access in vSphere In this article we describe the VMDirectPath I/O mechanism (also called “passthrough”) for using a GPU on vSphere. Part 4 explores the setup for the BitFusion Flexdirect method of using GPUs Part 3 gives details on setting up the NVIDIA Virtual GPU (vGPU) technology for GPUs on vSphere Part 2 describes the DirectPath I/O (Passthrough) mechanism for GPUs Part 1 of this series presents an overview of the various options for using GPUs on vSphere This is part 2 of a series of blog articles on the subject of using GPUs with VMware vSphere.
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February 2023
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