Joshua Downer jdowner

Using bitlbee with HipChat

Initial setup

account add jabber [email protected] 'PASSWORD'
account hipchat set nick_source full_name
account hipchat set resource bot
account hipchat on

I was tired of Chrome eating all my laptop resources so I decided to put some limit to it with cgroup.

As I was using Ubuntu 12.04 with support for cgroup, I installed the package cgroup-bin and add the following group to the file /etc/cgconfig.conf:

group browsers {
    cpu {
#       Set the relative share of CPU resources equal to 25%
        cpu.shares = "256";
 }

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

	#!/bin/bash
	#
	# git-svn-diff originally by (http://mojodna.net/2009/02/24/my-work-git-workflow.html)
	# modified by [email protected]
	# modified by aconway@[redacted] - handle diffs that introduce new files
	# modified by [email protected] - fixes diffs that introduce new files
	# modified by [email protected] - fix sed syntax issue in OS X
	#
	# Generate an SVN-compatible diff against the tip of the tracking branch

	#!/usr/bin/env bash
	# bash 4.1.5(1) Linux Ubuntu 10.04 Date : 2019-01-02
	#
	# _______________\| noise : ambient Brown noise generator (cf. white noise).
	#
	# Usage: noise [minutes=59] [band-pass freq center=1786] [wave]
	# ^minutes can be any positive integer.
	# Command "noise 1" will display peak-level meter.
	#
	# Dependencies: play (from sox package)

	import QtQuick 1.0

	Rectangle {
	height: 300
	width: 400
	color: "gray"

	// This text element is for visual feedback when the signal fires
	Text {
	text: "(empty)"

	import contextlib


	@contextlib.contextmanager
	def stdchannel_redirected(stdchannel, dest_filename):
	"""
	A context manager to temporarily redirect stdout or stderr

	e.g.:

	top_gitdir() {
	local git_dir=$(git rev-parse --git-dir 2>/dev/null)
	if [ -n "${git_dir}" ]; then
	git_dir=$(realpath ${git_dir})
	echo ${git_dir/\/.git*/}
	fi
	}

	git_directories() {
	gtop \|\| return