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QEMU with VirtIO GPU Vulkan Support

With its latest reales qemu added the Venus patches so that virtio-gpu now support venus encapsulation for vulkan. This is one more piece to the puzzle towards full Vulkan support.

An outdated blog post on clollabora described in 2021 how to enable 3D acceleration of Vulkan applications in QEMU through the Venus experimental Vulkan driver for VirtIO-GPU with a local development environment. Following up on the outdated write up, this is how its done today.

Definitions

Let's start with the brief description of the projects mentioned in the post & extend them:

Investigating an Event Queue Hang

We had a fun bug last week that almost doubles as a logic puzzle. It makes perfect sense in hindsight, but as I was staring at it, it seemed every part of it was nailed down tight - until I spotted the obvious, natural assumption that had been violated from the start.

A bit of background. We're working with microservices propagating state with event streams. For a typical stream, most events will concern unrelated objects, so we parallelize them: each incoming event is assigned a key, and we accept parallel events so long as their keys don't collide with any events currently in progress. Furthermore, because we track our position in the input stream as a single number, we can't retire events as soon

Crippling Facebook

Facebook works with advertisers to target you. These instructions are one of the many ways to begin crippling that relationship. When AI targeting is crippled, your psychosecurity improves :)

On your desktop machine, goto https://accountscenter.facebook.com/ads/audience_based_advertising
Maximize the browser window
Press F12 and click on the Console tab
Select the code below, copy it, paste it upon the Console line (The area next to the > character in the Console window), and press enter:

A Short IPv6 Guide for Home IPv4 Admins

This guide is for homelab admins who understand IPv4s well but find setting up IPv6 hard or annoying because things work differently. In some ways, managing an IPv6 network can be simpler than IPv4, one just needs to learn some new concepts and discard some old ones.

Let’s begin.

First of all, there are some concepts that one must unlearn from ipv4:

Concept 1

Grand-master Level Chess without Search: Modeling Choices and their Implications

Yoav Golderg, February 2024.

Researchers at Google DeepMind released a paper about a learned systems that is able to play blitz-chess at a grandmaster level, without using search. This is interesting and imagination-capturing, because up to now computer-chess systems that play at this level, either based on machine-learning or not, did use a search component.[^1]

Indeed, my first reaction when reading the paper was to tweet wow, crazy and interesting. I still find it crazy and interesting, but upon a closer read, it may not be as crazy and as interesting as I initially thought. Many reactions on twitter, reddit, etc, were super-impressed, going into implications about projected learning abilities of AI systems, the ability of neural networks to learn semantics from observations, etc, which are really over-the-top. The paper does not claim any of them, but they are still perceiv

PostgreSQL is Enough

Background and Cron Jobs

Garbage collection with zero cost at non-GC time

Every once in a while I investigate low-level backend options for PL-s, although so far I haven't actually written any such backend for my projects. Recently I've been looking at precise garbage collection in popular backends, and I've been (like on previous occasions) annoyed by limitations and compromises.

I was compelled to think about a system which accommodates precise relocating GC as much as possible. In one extreme configuration, described in this note, there

	<!DOCTYPE html>
	<html lang="en">

	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>My Angular from Scratch</title>
	<style>
	.my-component {
	font-family: Arial, sans-serif;

	/*
	Copyright (c) 2024 Rendello

	Permission to use, copy, modify, and/or distribute this software for any
	purpose with or without fee is hereby granted.

	THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
	REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
	INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM

	# -- coding: utf-8 --
	import hashlib
	import base64
	import requests, string, struct, uuid, random, re
	import sys
	from collections import OrderedDict
	from sys import version
	from urllib3.exceptions import InsecureRequestWarning
	requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)
	# too lazy to deal with string <-> bytes confusion in python3 so forget it ¯\_(ツ)_/¯