deepak

>  - In ruby 1.8.x, what is the functional difference between rb_thread_schedule and rb_thread_select?

rb_thread_schedule() is the guts of the thread scheduler, it traverses
over the linked list of threads (several times) to find the next one
to switch into. The function is long (250 lines) and messy, and covers
all the combinations of thread status (RUNNABLE, TO_KILL, STOPPED,
KILLED) and wait state (FD, SELECT, TIME, JOIN, PID).

If there are no threads doing i/o or waiting on a timeout,
rb_thread_schedule() picks another thread from the list (considering

deepak

# Oleg Andreev <[email protected]> Oct 16, 2009
#
# This demonstrates how to perform a request to the same Rails instance without hitting HTTP server.
# Note 1: this does not boot another Rails instance
# Note 2: this does not involve HTTP parsing
# Note 3: dispatch_unlocked and rack.multithread=true are used to prevent deadlock on a dispatch mutex,
#         NOT to make inner requests operate concurrently as one may think.
# Note 4: inner request is created by merging outer request with some HTTP headers and rack options.
#         This may probably lead to strange effects, so be aware of it. 
#         Perhaps, we shouldn't use outer request at all. I don't know.

deepak

#
# Created by Eric Lindvall <[email protected]>
#
# WHAT: Provides a simple overview of memory allocation occuring during a
# require.
#
# For a longer explanation, see my post at:
#
# http://bitmonkey.net/post/308322913/tracking-initial-memory-usage-by-file-in-ruby
#

deepak

From bb2a78858cffa7c6937642986e9aca1a4f862c0d Mon Sep 17 00:00:00 2001
From: Ilya Grigorik <[email protected]>
Date: Thu, 10 Jun 2010 00:46:48 -0400
Subject: [PATCH] async rails3

---
 Gemfile                               |    6 ++++++
 app/controllers/widgets_controller.rb |    6 ++++++
 app/models/widget.rb                  |    2 ++
 config.ru                             |    1 +

deepak

#!/usr/bin/env ruby
#
# Find bloating passengers and kill them gracefully. Run from cron every minute.
#

# required for passenger since cron has no environment
ENV['HTTPD'] = 'httpd'

MEM_LIMIT = ARGV[0] || 500

deepak

# Used to graph results from autobench
#
# Usage: ruby autobench_grapher.rb result_from_autobench.tsv
#
# This will generate three svg & png graphs

require "rubygems"
require "scruffy"
require 'csv'
require 'yaml'

deepak

#! /bin/sh

### BEGIN INIT INFO
# Provides:          nginx
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the nginx web server
# Description:       starts nginx using start-stop-daemon

deepak

require 'benchmark'

module Kernel
  alias old_require require

  def require(path)
    #unless caller.find { |caller_line| caller_line.match /dependencies\.rb/ }
    #  return old_require(path)
    #end

deepak

#
# Created by Eric Lindvall <[email protected]>
#
# WHAT: Provides a simple overview of memory allocation occuring during a
# require.
#
# For a longer explanation, see my post at:
#
# http://bitmonkey.net/post/308322913/tracking-initial-memory-usage-by-file-in-ruby
#

deepak

~/projects/jruby ➔ jmap -histo 19907 | grep rubyobj | head -50
 116:          1945          46680  rubyobj.Gem.Version
 118:          1898          45552  rubyobj.Gem.Version
 120:          1826          43824  rubyobj.Gem.Requirement
 123:          1804          43296  rubyobj.Gem.Requirement
 158:           914          21936  rubyobj.Gem.Dependency
 166:           876          21024  rubyobj.Gem.Dependency
 209:           463          11112  rubyobj.Gem.Specification
 211:           455          10920  rubyobj.Gem.Specification
 319:           142           3408  rubyobj.ActiveSupport.TimeZone