2,341 questions
0
votes
1
answer
389
views
Can we use sounddevice library in Python to play an audio file (.wav or .mp3) on a virtual cable instead of pygame library in Ubantu?
Can I work with Virtual Cables in Ubantu using sounddevice library of Python? I am trying to play an audio file on a Virtual Cable. I have done this using pygame library. Now, I need to do it using ...
0
votes
1
answer
171
views
What is the most efficient way of virtualize large data?
I have a list of cards that contains charts, images on it. Since the chart data and image requests slowdown my application, I thought to follow a virtualization technique. I'm currently using ngx-...
- 45
0
votes
0
answers
227
views
How to measure the number of CPU cycles required for VMFUNC instruction running on a physical machine?
I want to use a simple program to measure the number of cycles required by VMFUNC instruction in x86 architecture on a Linux Ubuntu 18.04 machine. Is there any fast and accurate method? Thanks!
- 21
1
vote
0
answers
637
views
Blazor - Virtualize card deck stuck in infinite loop
I'm working on a .NET6 Blazor webassembly project, and I have a component which display a large amout of cards with a bootstrap4 Card deck layout.
I would like to use the Virtualize component to speed ...
- 866
0
votes
0
answers
2k
views
How to use the QEMU that I compiled with my libvirt? qxl error
I've been trying to run a QEMU that I compiled by myself. I could run it if I use plain qemu commands, but it gets wrong when I substitute the system QEMU with the one I compiled.
If you use the virus ...
1
vote
1
answer
3k
views
Do kubernetes master and Worker nodes need standalone machines?
Im starting to work on Kubernetes and there is one thing that is bugging me. The question might be silly, but Im unable to find an answer for it.
In Kubernetes, we have Master node(Control Plane) and ...
- 13
3
votes
0
answers
143
views
Use Bluetooth in Virtual Machine made using Virtualization.framework with Swift
Is it possible to make bluetooth work on a virtual machine made using Virtualization.framework? I don't see anything related to bluetooth inside VZVirtualMachineConfiguration.
I'm running macOS ...
1
vote
0
answers
388
views
Twincat, how to virtualise Ethercat between two hyper V pc
I have created 2 Hyper V machine running windows 11 and Twincat .29, i have then created a NIC on both the virtual PC´s. to run Ethercat, and installed beckohff RT driver on it.
All that works.
The ...
- 19
0
votes
0
answers
61
views
Can the procedure of VM IRQ injection in KVM be parallel?
When I have many IRQs to inject into many individual VMs, can I make the procedure of injection be parallel?
I found this part is the bottleneck of my project, so I want to optimize it.
Any idea about ...
- 35
0
votes
1
answer
446
views
How do Laravel and Docker play together?
I want to get into Laravel development. As per Laravel's installation guide, I have installed Docker first, which was a first for me.
But for me to finally install Laravel, I need to have a docker ...
- 39
2
votes
0
answers
628
views
Getting a VZVirtualMachine for a running virtualmachine
I would like to write a thin wrapper around the Virtualization framework that offers docker style commands to start and stop virtual machines. One hurdle I found is the inability to create ...
- 60k
0
votes
2
answers
454
views
What is the difference between containers and process VMs (NOT system VMs)?
As far as I understand, ...
virtualization, although commonly used to refer to server virtualization, refers to creating virtual versions of any IT component, such as networking and storage
although ...
- 93
1
vote
1
answer
738
views
How to clear install media list in virt-manager createvm page
There is an install media list in Virt-Manager createvm page.
Create VM Page ISO/CDROM list UI
Some media files were deleted but still shown in the list.
I have checked all the files located in /etc/...
- 11
0
votes
1
answer
1k
views
How to enable inbound port in Hyper-V inside Azure VM?
Problem Description
We used to set up an Ubuntu Azure VM (consider Private IP as 109.11.23.11) for sending some simulated data. We need to set up multiple azure VM's for each one for every simulator.
...
- 665
4
votes
1
answer
14k
views
Docker gives 'no such file or directory: unknown' on a docker run command
I was able to successfully build a Docker image, via docker build -t foo/bar ..
Here is its Dockerfile:
FROM ubuntu:20.04
COPY benchmark.sh /home/benchmarking-programming-languages/benchmark.sh
CMD [ ...
- 369
1
vote
0
answers
432
views
When is QEMU Page table used instead of the EPT when running a virtual machine?
I am studying the set of the access bit in the QEMU page table when running a virtual machine on KVM.
In order to know if the CPU sets the access bit to 1 on QEMU page table, I wanted to answer the ...
- 72
1
vote
1
answer
3k
views
Receiving errors when trying to install virt-manager on MacOS monterey
I have been trying to install virt-manager on macOS Monterey.
I have ran these commands:
brew install libvirt
brew tap arthurk/homebrew-virt-manager
brew install virt-manager virt-viewer
during ...
- 13
0
votes
1
answer
611
views
why docker instances can run on both windows and linux machine without the need of VM?
I'm a newbie to docker. I know the key difference between Docker and VM is, containers share the host's operation system while VM requires a seperate operation systems.
But I saw some images which can ...
user16276760
0
votes
0
answers
146
views
Thousands of radio buttons cause low performance in WPF
I need to create an user control that displays the wafer map, so I used a ListBox with uniform grid and each cell represents a die in the wafer. The problem I got is that when there are too many dies, ...
1
vote
1
answer
11k
views
HAXM not installing.. The system requirements are not satisfied [duplicate]
While installing Android Studio, I got the error that HAXM didn't install.. so i tried installing haxm using the solutions provided in stackoverflow, youtube etc.. but its not working.
I have enabled ...
-1
votes
1
answer
321
views
KVM Support for Android Emulator with Amazon AMI
Hi I want to run Android Emulator using Bitbucket pipeline runner and it needs KVM support machine. Please suggest ami that has KVM support (virtualisation enabled).I tried C5 and Oracle Enterprise ...
- 6,022
0
votes
0
answers
221
views
Can I use Blazor Webassembly app on zero-client systems?
I'd like to develop a Blazor WASM for a company. This company uses the zero-client and virtualization to providing OS for users.
Blazor WebAssembly run your application as web assembly binaries ...
- 1,290
0
votes
0
answers
72
views
Blazor Parameter Object or child API call or Virualization?
I am working on a project that includes a list of Help Articles.
Clicking on an Article in the list opens the Article.
OnInitializedAsync() calls to the API for the Article.include(Comments)....
0
votes
0
answers
184
views
Backwards compatibility of ARM ISA Versions (particularly when using QEMU w/ KVM acceleration)
I'm working on using QEMU w/ KVM acceleration to test various arm64 binaries. My host CPU is ARMv8.5 the guest CPU I'm trying to emulate is an ARM Cortex-A53 (ARMv8). Few questions:
Will these ...
1
vote
1
answer
416
views
How can I run private instances of my Discord Bot for each server?
A bot I'm working on offers a premium subscription and as one of the perks, I'd like to offer users a chance to change stuff like the avatar, username, status, etc. for the bot in their server, ...
- 149
2
votes
0
answers
275
views
Is it possible to virtualize a single process?
I'm looking for a way to effectively virtualize a single process (and, presumably, any children it creates). Although a Container model sounds appropriate, products like Docker don't quite fit the ...
- 31
0
votes
0
answers
42
views
Is it possible to partially virtualize the physical address space?
I'm currently working on systems that include embedded Linux and FPGAs. We've various IP cores that support the AXI-Bus. To communicate with the IP cores of PL (programable logic), we need to map them ...
- 1,305
20
votes
9
answers
47k
views
how to resolve minikube start error : This computer doesn't have VT-X/AMD-v enabled. Enabling it in the BIOS is mandatory [closed]
minikube v1.25.1 on Microsoft Windows 10 Home Single Language 10.0.19043 Build 19043
MINIKUBE_HOME=C:\os\minikube\Minikube
Automatically selected the virtualbox driver
Starting control plane node ...
- 325
1
vote
0
answers
130
views
Groups went missing in ListView after expanding and collapsing expander in WPF C# with IsVirtualizing set to True
I have ListView and there is Grouping going on in it for one of the field 'Name'. The ItemSource is bound to an ObservableCollection. Somehow when grouping is applied, the virtualization is turn off ...
- 31
0
votes
1
answer
905
views
How to access localhost on VMware Mac as Guest and Win10 as Host
If you don't understand the question could you please let me know in the comment instead of killing the question?
Main Host System: Windows 10 with XAMPP Server Running
Virtualization App: VMware® ...
- 444
0
votes
1
answer
215
views
How does process switch take place in full virtualized VM?
I know that when a program inside a Virtual Machine full virtualized tries to execute a privileged instruction,since it is running in user mode, the "trap and emulate" occurs and so the ...
- 1
0
votes
0
answers
2k
views
How do virtual machines use memory and cpu cores from host?
Im trying to understand how virtual machines work with relation to host.
Lets say my host has an 8 core cpu and 16gb ram
I want to create some virtual machines. Does this mean I can create
3x (2 core +...
- 31
0
votes
1
answer
183
views
vagrant: select sync method by provider
Is any reliable method available for including a conditional in a Vagrantfile, for use in Vagrant, to select method of folder syncing based on provider?
Presently, I have included the following line:...
- 796
1
vote
0
answers
207
views
Is it possible to test OS in Github Actions workflow?
I'm writing an OS and would like to create a CI pipeline to check it builds and launches successfully after every commit. Locally I build it using qemu-system-i386 -d guest_errors -vga std -drive ...
- 678
0
votes
1
answer
310
views
Failed in using LD_PRELOAD to hook mmap system call in qemu(through libvirt)
I want to hook mmap system call in qemu, and I use libvirt to passthrough the environment argument like this:
<qemu:commandline>
<qemu:env name='LD_PRELOAD' value='/glibcHookMMAP.so'/>
&...
- 1
2
votes
0
answers
1k
views
SSH connection to an OpenShift virtual machine not working
I have created a virtual machine using RedHat OpenShift virtualization, but I am unable to connect to it using SSH.
My virtual machine pod is running and I am able to able to access the pod terminal ...
- 31
1
vote
1
answer
822
views
Cannot use testpmd to send pkts to VM in qemu process though virtio
I'm trying to test vhost-user/virtio-net. I used testpmd to send pkts (in txonly mode) to qemu VM. But all pkts were droped showed by testpmd. here is my environment:
DPDK version: 19.08
(HOST) ...
- 13
0
votes
0
answers
126
views
How are para-virtualized devices faster than emulated devices in a virtual environment?
I am having trouble understanding how para-virtualized devices offer increased performance compared to typical emulated devices. For example, in the context of KVM, virtio uses a virtio_ring which is ...
- 151
2
votes
0
answers
1k
views
React-Window with MUI collapsible table rows
I looking for help sorting out problem I encountered recently while working with React-Window and MUI Collapsible Table Rows.
In general react-window render row for each of my item in the array, with ...
- 21
3
votes
1
answer
2k
views
Which networking syscalls cause VM Exits to Hypervisor in Intel VMX?
I am having trouble understanding which (if any) system calls cause a VM Exit to VMX root-mode under Intel VMX. I am specifically interested in network-related system calls (i.e. socket, accept, send, ...
- 151
1
vote
1
answer
33
views
I want to make a procedurally generated virtualized drive - how can I do this?
I've had the idea for a procedurally generated virtual drive bouncing around my head for a long time. It wouldn't really have any uses, and really it would just be for the memes, but I've finally ...
- 13
0
votes
1
answer
3k
views
combined size of system firmware exceeds 8388608 bytes in android-vshell (qemu)
I've followed the blog post and create an aarch64 vm with alpine 3.14 (virt) (with minor changes as the post is for linux and i'm on mac):
qemu-img create -f raw asvm-arm64-hd.img 2G
qemu-system-...
- 20.6k
3
votes
3
answers
884
views
What causes overhead in QEMU in case of trivial `sleep 1`?
Experiment:
I ran sleep 1 under strace -tt (which reports timestamps of all syscalls) in host and QEMU guest, and noticed that the time required to reach a certain syscall (clock_nanosleep) is almost ...
- 2,011
0
votes
1
answer
3k
views
Why does QEMU use JIT compilation?
The TCG "accelerator" is used by QEMU when requesting full virtualization of a guest with a different hardware architecture (or with -accel=tcg).
TCG is a JIT compiler which emulates the ...
- 1,449
0
votes
0
answers
224
views
KVM - Get segment register value
I'm trying to get segment register value from KVM.
struct vcpu_vmx *vmx = to_vmx(vcpu);
vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS);
printk("%p\n&...
- 80
1
vote
1
answer
396
views
Any significant concept difference between container and binder?
I am new to Docker and confused about the concept of containerization. I wonder about the key difference between Docker container and Binder project. Here is the definition from Google search:
A ...
- 339
2
votes
3
answers
7k
views
How to instantiate an ARM-based VM through Linux KVM API on x86?
Say I have a x86 machine. It's easy to create a x86 VM through Linux KVM API.
See: vm_init() in kvm-host:
if ((v->kvm_fd = open("/dev/kvm", O_RDWR)) < 0)
return throw_err("...
- 23
-1
votes
1
answer
298
views
Guest VM - Exit
For the below series of instructions, is an exit possible? Which instruction can potentially cause an exit and which kind of exit? What'd be the reason for the particular type of exit?
da3bd <...
- 1
0
votes
1
answer
2k
views
How to retain the changes in the QEMU VM image?
I want to use QEMU to emulate Linux OS and create a Virtual Machine (VM) for Tiny Core Linux (TCL). I used the following commands the run TCL VM via QEMU.
First, I created a VM image in qcow2 format (...
- 59
2
votes
1
answer
3k
views
qemu-system-x86_64: Initialization of device ide-cd failed: Failed to get shared "write" lock [closed]
So I'm trying to download Ubuntu on Qemu, and I wrote this command into the cmd:
qemu-system-x86_64 -hda ubuntu-20.04.3-desktop-amd64.iso -boot d -cdrom /home/pi/Downloads/ubuntu-20.04.3-desktop-amd64....
- 133