jvoorhis

2010 07 09 10:30

Galois Tech Talk: Requirements and Performance of Data Intensive, Irregular Applications

Iavor S. Diatchki
  Pacific NW National Laboratory

Analytics
  Security
    Anomaly detection

jvoorhis

#!/usr/bin/env ruby

require 'webrick'
require 'webrick/httpproxy'

callback = proc do |request, response|
  if response.content_type =~ /jpe?g|png|gif/
    f = Tempfile.new("upside-down")
    f.write response.body
    f.close

jvoorhis

#!/usr/bin/env ruby

require 'webrick'
require 'webrick/httpproxy'

callback = proc do |request, response|
  if response.content_type =~ /jpe?g|png|gif/
    f = Tempfile.new("upside-down")
    f.write(response.body)
    f.close

jvoorhis

undefined method `taint!' on an instance of Hash.
kernel/delta/kernel.rb:85:in `taint! (method_missing)'
kernel/common/hash.rb:555:in `reject'

jvoorhis

; ModuleID = 'Siren'

%0 = type { float, float, float, float, float }

declare float @powf(float, float)

declare float @sinf(float)

declare float @cosf(float)

jvoorhis

class Int
  attr_reader :value
  def initialize(value)
    @value = value
  end
  def accept(visitor, *data)
    visitor.visit_int(self, *data)
  end
  def fold(rules)
    rules[Int].call(value)

jvoorhis

irb(main):028:0> Complex(-1,1).real == -1
=> true
irb(main):029:0> -1 ** 0 
=> -1
irb(main):030:0> Complex(-1,1).real ** 0
=> 1

jvoorhis

NoMethodError (You have a nil object when you didn't expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]):
  lib/heap_dump/dumped_lookup_table.rb:7:in `each'
  lib/heap_dump/dumped_module.rb:38:in `find_class'
  lib/heap_dump/decoder.rb:166:in `decode'
  lib/read_dump.rb:23:in `initialize'
  lib/read_dump.rb:32:in `session'
  app/controllers/heap_viewer_controller.rb:5:in `show'

jvoorhis

require 'llvm/core'
require 'llvm/execution_engine'
require 'llvm/transforms/scalar'

LLVM.init_x86

mod = LLVM::Module.new("Function Pointers")

F  = LLVM::Function([LLVM::Int], LLVM::Int)
FP = LLVM::Pointer(F)

jvoorhis

class Action < Struct.new(:action)
  def initialize(&block)
    super block
  end
  
  def call
    action.call
  end
  
  def seq(rhs)