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Questions tagged [paravirtualization]

In computing, paravirtualization is a virtualization technique that presents a software interface to virtual machines that is similar but not identical to that of the underlying hardware.

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How to find if my OS is running on a virtualized or non-virtualized environment?

I have access to a machine to which I can ssh. How to determine if my OS is running in fully-virtualized (where VMM does binary translation), para-virtualized or non-virtualized environment? I have some idea of how to go about it (some operations…
Bruce
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Difference between Sensitive Instructions and Privileged Instructions

I've been searching for a clear difference b/w a Sensitive and Privileged instruction but its all blurry right now. As far as i know: A sensitive instruction NEEDS TO trap to kernel mode if executed in User space else it gets ignored while a…
Aimal Khan
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Is xen dom0 a guest or a host?

I always thought that xen dom0 is a host and hosts other domU s. On the xen wiki page they mention xen dom0 as a Host OS. However in one of the xen dev list threads, xen developer mentioned that dom0 is a PV guest. In this thread the last reply on…
NULL
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Vagrant - paravirtualization "kvm" on VirtualBox version below 5.0

I have this vagrant settings below: 12 config.vm.provider "virtualbox" do |v| 13 v.customize ["modifyvm", :id, "--memory", "256"] 14 v.customize ["modifyvm", :id, "--cpus", "1"] 15 v.customize ["modifyvm", :id,…
jck
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Xen PV VM uses max 1 Thread

I am running a CPU benchmark tool (LINPACK) on a PV virtual machine inside Xen 4.5.1 on Ubuntu 15.10 x64 on an IBM x3550 M4 server. This tool should consume all possible CPU cycles available. I allocate 4 vCPUs by defining this in the Xen PV…
roflmaowpimp
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Full Virtualization vs. Paravirtualization

I'm undergraduated student and not good at English(please forgive me..) full vs. para In this diagram, I understood that Full I/O virtualization "Trap & emulate" -> hypervisor should "trap" priviledged instruction of virtual device driver(because…
choiyhking
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Why is the Virtqueue transmission of Virtio/Vhost so complex?

I'm a developer of dpdk, and I'm develping something about virtio/vhost in dpdk. I got a question about the virtqueue. IMHO, Virtqueue is purely a producer-consumer model, which could be solved with just two pointers. Why is it implemented in such a…
kellerman
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kernel code native_queued_spin_lock_slowpath function

In the kernel code, I cannot find the definition of the native_queued_spin_lock_slowpath function, __pv_queued_spin_lock_slowpath is the same, where are these functions defined? I searched all the kernel code, but in vain
Benjamin Wilson
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XEN Hypervisor on ARM, paravirtualization and measurement of Core performance

i am working on the S32G3 processor from NXP and i am trying to find a way to test the performance of the cores, i found that i can do that using Xenalyze. i want to measure exactly the switch context, this is the time we need to switch from a VM to…
youssef
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XEN ParaVirt guest boot parameters

I have a XEN server with a PV guest. I would like to change the guest boot parameters. These are my current parameters inside the PV guest, and I want to add another one. $ cat /proc/cmdline root=/dev/xvda2 ro elevator=noop root=/dev/xvda2…
user1637056
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Can a hypervisor with paravirtualized guests benefit from virtualization extensions?

A hypervisor developer claimed that, even though they only support paravirtualized guests, the virtualization would still be faster on a platform with hardware virtualization extensions. Does this make sense? And through which mechanism could there…
rweilbacher
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Sharing a COM port on LDOMs

I am new to server virtualization and partitioning. I have a SPARC server running Solaris 10. In that I have created four domains using LDOM each running Solaris 10. Now I am trying to share the serial port of the host to the logical domains. Is it…
MajorBlackViking
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How do I migrate Proxmox 3.x openVZ containers to Proxmox 4.x LXC?

I have just upgraded one of the Proxmox machines in a cluster from 3.4 to 4.2 following these instructions. Normal VMs have migrated correctly. We had to change hard drives from virtio to ide so that the machines would detect them but other than…
Calabacin
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Benchmarking Disk Performance (Windows and Linux on Xen)

I am kind of new to the world of virtualization...I am doing some tests using different tools (iometer, fio, dd tool, and bonnie++). The idea is to benchmark the disk performance for different operating systems in a virtualized environment and for…
Mabu
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Hardware assisted virtualization on centos and 32_bit system

I'm preparing my-self for RHCSA. I have a 32 bit system installed centos on it. I cant use KVM on it because KVM on it because the processor architecture. I want you to answer my problem according to following parameters. How can I use KVM/ if I…
Ammar Ameerdeen
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