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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

This is a document describing how to install Ubuntu 16.04 LTS on ThinkPad T470s.

My Hardware

CPU: Intel Core i7-7600U (2.80GHz, 4MB cache)
Graphics: Intel HD Graphics 620
Display: 14” WQHD (2560 X 1440) IPS Non-Touch Anti-Glare
Memory: 24GB DDR4 2133 MHz (8GB Onboard + 16GB)
SSD: PCIe-NVMe 256G OPAL 2.0
Wireless: Intel Dual Band Wireless AC (2x2) 8265 Bluetooth 4.1
Fingerprint Reader

Introduction

This is about documenting getting Linux running on the late 2016 and mid 2017 MPB's; the focus is mostly on the MacBookPro13,3 and MacBookPro14,3 (15inch models), but I try to make it relevant and provide information for MacBookPro13,1, MacBookPro13,2, MacBookPro14,1, and MacBookPro14,2 (13inch models) too. I'm currently using Fedora 27, but most the things should be valid for other recent distros even if the details differ. The kernel version is 4.14.x (after latest update).

The state of linux on the MBP (with particular focus on MacBookPro13,2) is also being tracked on https://github.com/Dunedan/mbp-2016-linux . And for Ubuntu users there are a couple tutorials (here and here) focused on that distro and the MacBook.

Note: For those who have followed these instructions ealier, and in particular for those who have had problems with the custom DSDT, modifying the DSDT is not necessary anymore - se

Install Scala 2.11.8

$ sudo apt-get remove scala-library scala
$ sudo wget www.scala-lang.org/files/archive/scala-2.11.8.deb
$ sudo dpkg -i scala-2.11.8.deb

Check Scala version

$ scala -version

Raspberry Pi VPN Router

This is a quick-and-dirty guide to setting up a Raspberry Pi as a "router on a stick" to PrivateInternetAccess VPN.

Requirements

Install Raspbian Jessie (2016-05-27-raspbian-jessie.img) to your Pi's sdcard.

Use the Raspberry Pi Configuration tool or sudo raspi-config to:

	Industry
	Accounting
	Airlines/Aviation
	Alternative Dispute Resolution
	Alternative Medicine
	Animation
	Apparel/Fashion
	Architecture/Planning
	Arts/Crafts
	Automotive

	sudo add-apt-repository ppa:ubuntu-lxc/lxd-stable

	sudo apt-get update
	sudo apt-get -y upgrade
	sudo apt-get install golang

	# Usually this is good to install golang, but alas the apt-get repo is usually out of sync with the latest.

	from django.db.models import Count, Max

	unique_fields = ['field_1', 'field_2']

	duplicates = (
	MyModel.objects.values(*unique_fields)
	.order_by()
	.annotate(max_id=Max('id'), count_id=Count('id'))
	.filter(count_id__gt=1)
	)