![]() It may be desirable to adjust some of the settings for balanced performance results according to actual requirements and workloads. Please note that these BIOS setting are trying to achieve best performance, it may cost more power. BIOS Settingīesides the CPU core number and the size of the System Memory, the following BIOS settings also have impacts on the virtual machine performance. This will help users to determine the number of CPU cores the system requires. Please use historical data to estimate peak time requirements, for example, how many concurrent virtual machines and virtual CPUs the system commits to meet the service level agreements (SLA). The faster the frequency, the shorter time it takes to execute a typical workload. CPU frequency is another critical factor to consider. In general, the more CPU cores and the more memory in the system, the more virtual machines the system can support. 3 rd Gen Intel Xeon Scalable processors support up to 40 cores, up to 6TB of system memory, and up to 8 memory channels per socket. Hardware configuration and settings play an important role regarding performance. However, please note that we rely on the users to carefully consider these settings for their specific scenarios. This guide aims to help the reader to get the best virtualization performance on 3 rd Generation Intel Xeon Scalable processor based platforms. This guide assumes that the audience has general knowledge of the Linux* Operating System and KVM/Qemu based virtualization. This guide is targeted towards cloud administrators or users who deploy KVM/Qemu solutions and want to achieve best performance results on 3 rd Generation Intel® Xeon® Scalable processor based platforms. Now we can use this file as harddisk in our qemu boot: qemu-system-x86_64 -boot d -cdrom image.iso -m 512 -hda mydisk.KVM/Qemu Virtualization is the foundational technology and the major use scenario in cloud environment. In this example we’re created an image of 10 GB. If you want to install a distribution to a harddisk image file, you need to create harddisk image file first: qemu-img create mydisk.img 10G If the device is /dev/cdrom you can boot a cd in the device like that: qemu-system-x86_64 -boot d -cdrom /dev/cdrom -m 512Ībove examples not use any harddisk, so it is suitable for live cd image case. It is also possible to use your regular cdrom device too. You have an iso image and you want to boot from it without restarting the system, simply use qemu virtual machine as below ( -m 512 says qemu will be use 512 Mb of RAM from system): qemu-system-x86_64 -boot d -cdrom image.iso -m 512 For example, if you just want user mode cpu emulation for X86-64 architecture, you need to use qemu-x86_64 binary and if you need whole X86-64 bit system emulation (like your PC), qemu-system-x86_64 binary must be used in commands below. Newer distributions have separate binaries for these two different operation modes. If you want to simulate whole system not just the cpu (like a PC) you need to use full system emulation mode. ![]() Qemu has two operating mode named full system emulation and user mode emulation. ![]()
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