Christian S. Perone perone

IC-7300 digital modes/FT8 setup

WSJT-X Radio tab

Serial Port: /dev/cu.SLAB_USBtoUART
Baud Rate: 115200
Data Bits: Eight
Stop Bits: Two
Handshake: None

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

Below are some issues we encountered during our first real deployment of gevent. It is being used on one host to communicate over ethernet (ie, using raw ethernet packets) with approximately 700 PIC32 microprocessors, and it is used for communication between all of the services we have built (approximately 15 unique services running on two hosts).

The majority of the issues we faced were caused by a particular service which communicates with a child process over stdin/stdout. Not all of the issues were gevent specific (for example, when the child wasn't properly selecting on stdout, the kernel was silently dropping data when its internal buffer filled up, even though fwrite reported that the data had been written).
We are using gevent-0.13.7 with libevent-2.0.x. I would like to be using gevent-1.0, but it was causing some issues (I don't recall exactly what they were) on OS X, so we rolled back to 0.13.7.
libevent-1.4.13-stable (packages with Debian stable 6.0.4) would, under moderate l

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

	{0: 'tench, Tinca tinca',
	1: 'goldfish, Carassius auratus',
	2: 'great white shark, white shark, man-eater, man-eating shark, Carcharodon carcharias',
	3: 'tiger shark, Galeocerdo cuvieri',
	4: 'hammerhead, hammerhead shark',
	5: 'electric ray, crampfish, numbfish, torpedo',
	6: 'stingray',
	7: 'cock',
	8: 'hen',
	9: 'ostrich, Struthio camelus',

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	<!DOCTYPE html>
	<html>
	<head>
	<script src="/socket.io/socket.io.js"></script>
	<script>
	(function () {

	var onMessage = function (data) {
	// Do something with the message data
	};

	import sys
	from gevent import server
	from gevent.baseserver import _tcp_listener
	from gevent import pywsgi
	from gevent.monkey import patch_all; patch_all()
	from multiprocessing import Process, current_process, cpu_count

	def hello_world(env, start_response):
	if env['PATH_INFO'] == '/':
	start_response('200 OK', [('Content-Type', 'text/html')])

	from geventwebsocket.handler import WebSocketHandler
	from gevent.pywsgi import WSGIServer
	from flask import Flask, request, render_template

	app = Flask(__name__)

	@app.route('/')
	def index():
	return render_template('index.html')