kprotty

const M = 12; // Probability scale for rANS state. Symbol frequencies in this log range. Usually 8-12.
const L = 23; // Renormalization factor to control dumping rANS state to bitstream. From rans_byte.h.
const m_min = 8 - 2 - (std.math.divCeil(u32, M, 4) catch unreachable); // Small-size-opt limit when compressing frequencies.
const m_max = [_]u16{m_min, m_min+16, m_min+16+256, m_min+16+256+4096, 1<<M}; // Size ranges for frequencies after small size limit.

fn compress(dst: anytype, src: []const u8) !void {
    // Histogram for the frequency of each byte in input.
    var hist = [_]u32{0} ** 256;
    for (src) |byte| hist[byte] += 1;

nrjdalal

Install QEMU on Silicon based Apple Macs (June 2021)

Option 1 - Automatically

zsh -c "$(curl -fsSL https://raw.githubusercontent.com/nrjdalal/silicon-virtualizer/master/install-qemu.sh)"

Option 2 - Manually

• Install Xcode command line tools

xcode-select --install

ankyit

// Variable Definition
variable "aws_region" {}
variable "aws_vpc_cidr_block" {}
variable "aws_subnet_cidr_block" {}
variable "aws_private_ip_fe" {}
variable "aws_Name" {}
variable "aws_Application" {}
variable "aws_ami" {}
variable "aws_instance_type" {}

utdrmac

if sysbench.cmdline.command == nil then
   error("Command is required. Supported commands: run")
end

sysbench.cmdline.options = {
	point_selects = {"Number of point SELECT queries to run", 5},
	skip_trx = {"Do not use BEGIN/COMMIT; Use global auto_commit value", false}
}

local page_types = { "actor", "character", "movie" }

TyrfingMjolnir

A minor list of how to create and boot a Bhyve-zone in Joyent SmartOS

cd /opt/local/artifacts/
vim zonemanifestBhyveFreeBSD.json
vmadm create < zonemanifestBhyveFreeBSD.json
curl -kLo /zones/UUID/root/FreeBSD-12.0-RC3-amd64-bootonly.iso

The following line is for KVM, not BHYVE, hence obsoleted for non-legacy boot options

cd /zones/<<UUID>>/root/

miklobit

The repository for the assignment is public and Github does not allow the creation of private forks for public repositories.

The correct way of creating a private frok by duplicating the repo is documented here.

For this assignment the commands are:

1. Create a bare clone of the repository. (This is temporary and will be removed so just do it wherever.)

git clone --bare [email protected]:usi-systems/easytrace.git

JoelQ

What does x :: xs pattern matching mean in Elm?

:: is the list prepend operator in Elm.

3 :: 2 :: 1 :: []

is equivalent to

rkusa

# curl -LO http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.3/releases/x86_64/alpine-3.3.1-x86_64.iso
curl -LO http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.3/releases/x86/alpine-3.3.1-x86.iso

# create hdd image (8GB)
dd if=/dev/zero of=hdd.img bs=1g count=8

# extract kernel and initramfs
brew install cdrtools
isoinfo -i alpine-3.3.1-x86.iso -J -x /boot/initramfs-grsec > initramfs-grsec
isoinfo -i alpine-3.3.1-x86.iso -J -x /boot/vmlinuz-grsec > vmlinuz-grsec

dekobon

Installing the Oracle Java 8 JDK on SmartOS

1. Go to: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
2. Download the "Solaris x64 XX.X MB jdk-8u66-solaris-x64.tar.gz" tarball from the Oracle Java SE site. You won't be able to paste the URL into curl on your SmartOS instance unless you click it first to get the authentication parameter. Regardless, get the tarball any way that you prefer and copy it onto your SmartOS instance.
3. Extract the tarball and copy it to the location of your choosing.
4. Globally set the value of the environment variable JAVA_HOME to the path of the JVM.
5. Update your PATH to include the Java bin directory by setting it to PATH=$PATH:$JAVA_HOME/bin

nathwill

assumes centos 7 host, typical configuration

- disable selinux: SELINUX=permissive in /etc/sysconfig/selinux
- disable auditd: systemctl disable auditd.service
- enable journald persistence: `Storage=persistent` in /etc/systemd/journald.conf
- mkdir /var/lib/container
- yum -y --nogpg --releasever=7 --installroot=/var/lib/container/centos install systemd passwd yum vim-minimal openssh-server
- systemd-nspawn -D /var/lib/container/centos
- set root passwd, set ssh port (e.g. 2222)
- set up systemd-nspawn service: