Alex Toldaiev xealits

Open Computing Language (OpenCL) is a language and framework for writing computationally intensive kernels that run accross heterogenious platforms, including GPUs, CPUs, and perhaps other more esoteric devices.

Intel provides an OpenCL implementation for Intel CPUs, but there's not a lot of instructions on how to get it set up. Here's what I did.

Installing Intel CPU OpenCL on Ubuntu (12.04)

Download the Intel® SDK for OpenCL* Applications XE 2013 from the Intel website, here http://software.intel.com/en-us/vcsource/tools/opencl-sdk-xe. The download is a tarball -- the one I got is called intel_sdk_for_ocl_applications_2013_xe_sdk_3.0.67279_x64.tgz
Unpack the tarball and cd into the new directory

Erlang Tracing: more than you wanted to know

Rough Outline

What can be traced?
How can trace events be specified?
"match specifications": twisty passages, all alike
WTF, can I just use DTrace and drink my coffee/beer/whisky in peace?
Trace delivery mechanisms: pick one of two

A minimal HTTP server in python. It sends a JSON Hello World for GET requests, and echoes back JSON for POST requests.

python server.py 8009
Starting httpd on port 8009...

curl http://localhost:8009
{"received": "ok", "hello": "world"}

	julia> airline_array = readdlm("/Users/randyzwitch/airline/1987.csv", ',');

	julia> size(airline_array)
	(1311827,29)

	julia> typeof(airline_array)
	Array{Any,2}

	#!/bin/bash

	export GTAGSLABEL=ctags

	if [ -r $PWD/.globalrc ]; then
	GTAGSCONF=$PWD/.globalrc
	elif [ -r $HOME/.globalrc ]; then
	GTAGSCONF=$HOME/.globalrc
	elif [ -r /usr/local/share/gtags/gtags.conf ]; then
	GTAGSCONF=/usr/local/share/gtags/gtags.conf

	(ns particles.core)

	(def display (.getElementById js/document "display"))
	(def context (.getContext display "2d"))
	(def damping 0.999)
	(def max-particles 250)
	(def line-width 2)

	(def app-state (atom {:width (.-innerWidth js/window)
	:height (.-innerHeight js/window)}))

	# File Transfer model #3
	#
	# In which the client requests each chunk individually, using
	# command pipelining to give us a credit-based flow control.

	import os
	import sys
	from threading import Thread

	import zmq

	What exactly is "iowait"?

	To summarize it in one sentence, 'iowait' is the percentage
	of time the CPU is idle AND there is at least one I/O
	in progress.

	Each CPU can be in one of four states: user, sys, idle, iowait.
	Performance tools such as vmstat, iostat, sar, etc. print
	out these four states as a percentage. The sar tool can
	print out the states on a per CPU basis (-P flag) but most

Alex Toldaiev xealits

Installing Intel CPU OpenCL on Ubuntu (12.04)

Erlang Tracing: more than you wanted to know

Rough Outline

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