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

	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

	# list the files in EOS
	eos ls [-la] /eos/cms/user/t/test/

	# copy all inside the directory recursively
	eos cp -r /eos/cms/user/t/test/histodirectory/ /afs/cern.ch/user/t/test/histodirectory

	# copy a single file
	eos cp /eos/cms/user/t/test/histo.root /tmp/
	eos cp /eos/cms/store/user/Username/Datadir/Data.root .

	#!/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