vishvananda

Overview

For those that are unfamiliar with the project, PyPy is an implementation of the Python language that features a JIT Compiler. I have noticed a huge performance benefit in some personal projects by switching to PyPy. I have always been curious how it would perform on a large and complex project like OpenStack, but my early experiments ran into massive roadblocks around broken dependencies.

It has been six months since I last looked, so I figured it was time to try it again. Support has come a long way and, now that lxml is working, we are close enough to get a Proof-of-Concept running. Read on for instructions on running nova with PyPy.

Preparation

Start out with a base ubuntu 12.04 (precise) install and run devstack. I won't go through the details of getting devstack running here, because there are already instructions on the devstack site.

Forst

#!/bin/bash

## FORSTWOOF UBUNTU PRESEED :: BUILD SCRIPT

# Quit on first error
set -e

# Temporary directory for the build
TMP="/var/tmp/ubuntu-build"

esfand

Embedded Variables

The ngx_http_core_module module supports embedded variables with names matching the Apache Server variables. First of all, these are variables representing client request header fields, such as $http_user_agent, $http_cookie, and so on. Also there are other variables:

• $arg_name
  argument name in the request line

jayjanssen

this is a sample of output:

root@percona-db-2:~# iperf -s -u -B 226.94.1.1 -i 1
------------------------------------------------------------
Server listening on UDP port 5001
Binding to local address 226.94.1.1
Joining multicast group  226.94.1.1
Receiving 1470 byte datagrams
UDP buffer size:   122 KByte (default)
------------------------------------------------------------

cl4u2

/* 
   iflist.c : retrieve network interface information thru netlink sockets

   (c) Jean Lorchat @ Internet Initiative Japan - Innovation Institute

   v1.0 : initial version - Feb 19th 2010

   This file was obtained at the following address :
   http://www.iijlab.net/~jean/iflist.c

shamil

Use folowing steps to repackage dep package:

1: Extract deb package
    # dpkg-deb -x <package.deb> <dir>

2: Extract control-information from a package
    # dpkg-deb -e <package.deb> <dir/DEBIAN>

3. After completed to make changes to the package, repack the deb
    # dpkg-deb -b <dir> <new-package.deb>

glacjay

import fcntl
import os
import struct
import subprocess


# Some constants used to ioctl the device file. I got them by a simple C
# program.
TUNSETIFF = 0x400454ca
TUNSETOWNER = TUNSETIFF + 2