AoJ

First download alpine-make-vm-image from https://github.com/alpinelinux/alpine-make-vm-image

wget https://raw.githubusercontent.com/alpinelinux/alpine-make-vm-image/v0.4.0/alpine-make-vm-image \
    && echo '5fb3270e0d665e51b908e1755b40e9c9156917c0  alpine-make-vm-image' | sha1sum -c \
    || exit 1
mv alpine-make-vm-image /usr/local/bin/
chmod +x /usr/local/bin/alpine-make-vm-image

Create a new alpine qcow2 image

`git submodule` Tips

To clone a repo with submodules

git clone --recursive [email protected]:url_to/awesome_submodule.git path_to_awesome_submodule

Add a submodule clone into an existing repo

git submodule add [email protected]:url_to/awesome_submodule.git path_to_awesome_submodule

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

Reddit post (Archived)

Table of Content

What to expect?
- Some TLDR about the idea behind
Prerequisites
- Hardware
- System & Software
Update: Attention for MUXless laptop

	title enter da virtual w0r1d
	linux /vmlinuz-linux
	initrd /intel-ucode.img
	initrd /initramfs-linux.img
	options cryptdevice=UUID=a403fa05-b3c1-4d3e-864b-f3158ab74abc:root root=/dev/mapper/root intel_iommu=on iommu=pt rd.driver.pre=vfio-pci vfio-pci.ids=10de:1b81,10de:10f0,8086:15b6

	#iommu_groups \| grep -e "Group 13" -e "Group 14"
	#IOMMU Group 13 03:00.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3 Bridge [Alpine Ridge 2C 2015] [8086:1576]
	#IOMMU Group 13 04:00.0 System peripheral [0880]: Intel Corporation DSL6340 Thunderbolt 3 NHI [Alpine Ridge 2C 2015] [8086:1575]
	#IOMMU Group 14 03:01.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3 Bridge [Alpine Ridge 2C 2015] [8086:1576]

	#!/bin/bash
	#

	cd /local/backups \|\| exit 1
	export PATH=/usr/local/sbin:/usr/local/bin:$PATH

	BACKUPDEST="$1"
	DOMAIN="$2"
	MAXBACKUPS="$3"
	PASSWD="/* change this, obviously */"

	#include <stdio.h>

	#define SQ(x) (x)*(x)

	#define M0(x,y) SQ(x)+SQ(y)<4?0:0xe0
	#define M1(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M0(SQ(x)-SQ(y)+(x0),2(x)(y)+(y0)):0xc0
	#define M2(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M1(SQ(x)-SQ(y)+(x0),2(x)(y)+(y0),x0,y0):0xa0
	#define M3(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M2(SQ(x)-SQ(y)+(x0),2(x)(y)+(y0),x0,y0):0x80
	#define M4(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M3(SQ(x)-SQ(y)+(x0),2(x)(y)+(y0),x0,y0):0x60
	#define M5(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M4(SQ(x)-SQ(y)+(x0),2(x)(y)+(y0),x0,y0):0x40

	cmake_minimum_required(VERSION 2.8)
	project(sdnotify)

	add_executable(sdnotify sdnotify.cpp)
	target_link_libraries(sdnotify PUBLIC systemd)

	## AWS
	# from http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html#instancedata-data-categories

	http://169.254.169.254/latest/user-data
	http://169.254.169.254/latest/user-data/iam/security-credentials/[ROLE NAME]
	http://169.254.169.254/latest/meta-data/iam/security-credentials/[ROLE NAME]
	http://169.254.169.254/latest/meta-data/ami-id
	http://169.254.169.254/latest/meta-data/reservation-id
	http://169.254.169.254/latest/meta-data/hostname
	http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key

	# IMPORTANT!
	# This gist has been transformed into a github repo
	# You can find the most recent version there:
	# https://github.com/Neo23x0/auditd

	# ___ ___ __ __
	# / \| __ ______/ (_) /_____/ /
	# / /\| \|/ / / / __ / / __/ __ /
	# / ___ / /_/ / /_/ / / /_/ /_/ /
	# /_/ \|_\__,_/\__,_/_/\__/\__,_/