QEMU
Packer
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QEMU | Packer | |
---|---|---|
188 | 65 | |
9,118 | 14,850 | |
2.9% | 0.5% | |
10.0 | 9.4 | |
8 days ago | 1 day ago | |
C | Go | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
QEMU
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WASM Instructions
Related:
A fast Pascal (Delphi) WebAssembly interpreter:
https://github.com/marat1961/wasm
WASM-4:
https://github.com/aduros/wasm4
Curated list of awesome things regarding WebAssembly (wasm) ecosystem:
https://github.com/mbasso/awesome-wasm
Also, it would be nice if there was a WASM (soft) CPU for QEMU, which (if it existed!) would go here:
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Revng translates (i386, x86-64, MIPS, ARM, AArch64, s390x) binaries to LLVM IR
> architectural registers are always updated
In tiny code, the guest registers (global TCG variables) are stored in the host's registers until you either call an helper which can access the CPU state or you return (`git grep la_global_sync`). This is the reason why QEMU is not so terribly slow.
But after a check, this also happens when you access the guest memory address space! https://github.com/qemu/qemu/blob/master/include/tcg/tcg-opc... (TCG_OPF_SIDE_EFFECTS is what matters)
But still, in the end, it's the same problem. What QEMU does, can be done in LLVM too. You could probably be more efficient in LLVM by using the exception handling mechanism (invoke and friends) to only serialize back to memory when there's an actual exception, at the cost of higher register pressure. More or less what we do here: https://rev.ng/downloads/bar-2019-paper.pdf
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Multipass: Ubuntu Virtual Machines Made Easy
Some of these tools include Oracle VM VirtualBox (that I've used since before the acquisition of Sun Microsystems by Oracle), VMWare Workstation Player, and QEMU, but last year, I found out about Multipass.
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Libsodium: A modern, portable, easy to use crypto library
For C/C++ projects that use meson as the build system, there is an excellent way to manage dependencies:
https://mesonbuild.com/Wrapdb-projects.html
https://mesonbuild.com/Wrap-dependency-system-manual.html
meson will download and build the libraries automatically and give you a variable which you pass as a regular dependency into the built target:
https://github.com/qemu/qemu/tree/005ad32358f12fe9313a4a0191...
https://github.com/harfbuzz/harfbuzz/tree/main/subprojects
https://github.com/harfbuzz/harfbuzz/blob/37457412b3212463c5...
Or, if you're using proper operating systems, they're managed by the usual package manager, just like everything else.
- Show HN: I'm 17 and wrote this guide on how CPUs run programs
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UTM for Developers
In this tutorial, we set up macOS and Windows virtual machines on UTM, a macOS application that provides a GUI wrapper for QEMU, a powerful open-source emulator and virtualizer. UTM allows you to easily manage and run virtual machines without memorizing complex commands. It also has special handling for macOS, making it simpler to install compared to other virtual machine software.
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Replace Docker Desktop with Podman in OSX
On Mac, each Podman machine is backed by a QEMU based virtual machine. Once installed, the podman command can be run directly from the Unix shell in Terminal, where it remotely communicates with the podman service running in the Machine VM.
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VGA & RISCV: How do initialize vga in qemu-system-riscv64 ?
QEMU's "VGA" device is a typical PCI VGA adapter with Bochs SVGA extensions. First enumerate PCI so you can figure out how to talk to the device's I/O, then follow the Bochs SVGA specifications to write a driver. There's also some information on the wiki, although it seems to make a few x86-specific assumptions.
The links I gave you explain how to interact with it. This page explains how the Bochs SVGA registers are mapped in PCI devices. This page explains what the Bochs SVGA registers do. This page gives examples for how to use a Bochs SVGA device.
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A simple hash table in C
I've had lately a look at QEMUs internals and saw their thread safe implementation of a hash table, capable of concurrent reads: qht [0].
If the author sees this, you might want to take a look at it.
Packer
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The 2024 Web Hosting Report
To manage a VM, you can use something as simple as just manual actions over SSH, or can use tools like Ansible, Hashicorp's Packer and Terraform or other automations. For an app where there is minimal load and security/reliability concern, VMs are still a great option that provide a lot of value for the buck
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Avoiding DevOps tool hell
Server templating: Using Packer has never been easier to create reusable server configurations in a platform-independent and documented manner.
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DevOps Tooling Landscape
HashiCorp Packer is a tool for creating machine images for a variety of platforms, including AWS, Azure, and VMware. It allows you to define machine images as code and supports a wide range of configuration options.
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auto-provisioning multiple raspberry pi's
Packer is a tool that can be used to build machine images. Basically, it takes a base image, runs a series of steps to provision that image, and then burns a new image. In my workplace we use it heavily to build AWS AMIs. But it has an ARM plugin that looks to be very very suitable for building customised Raspberry Pi images (my quick read of the doco there says it can go ahead and write the final image to an SD card for you too).
- How do hosting companies immediately create vm right after purchasing one?
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Virtualbox 7.0.4 kickstart issue
However, I was unable to build the boxes with packer for some reason. It turned out that this wasn't an easy to fix or obvious issue. In fact, I had to search quite hard to find an answer. I am pretty sure my friend Tim Hall (oracle-base) ran into this issue too. Finally, I found a description of the issue on packer GitHub: Packer 1.8.4 not working with Virtualbox 7.0.4+ #12118.
I was building a new version of YugabyteDB vagrant box with packer and virtual box. Because we (Yugabyte) have a new preview release out.
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Is "development environment as code" a thing?
Packer. https://github.com/hashicorp/packer
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Dinamic Infrastructure
For an AMI build pipeline, have a look at Hashicorp Packer and Ansible if a host is long lived
- A practical approach to structuring Golang applications
What are some alternatives?
UTM - Virtual machines for iOS and macOS
TermuxArch - Experience the pleasure of the Linux command prompt in Android, Chromebook, Fire OS and Windows on smartphone, smartTV, tablet and wearable https://termuxarch.github.io/TermuxArch/
Unicorn Engine - Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc, PowerPC, RiscV, S390x, TriCore, X86)
Vagrant - Vagrant is a tool for building and distributing development environments.
helm - The Kubernetes Package Manager
oVirt - oVirt website
cloud-init-vmware-guestinfo - A cloud-init datasource for VMware vSphere's GuestInfo interface
kubernetes - Production-Grade Container Scheduling and Management
xemu - Original Xbox Emulator for Windows, macOS, and Linux (Active Development)
em-dosbox - An Emscripten port of DOSBox
virt-manager - Desktop tool for managing virtual machines via libvirt