Class: LinuxSystemMemory

Inherits:
SystemMemory show all
Defined in:
lib/memory.rb

Overview

Memory probe for Linux

Constant Summary

Constants inherited from SystemMemory

SystemMemory::UNLIMITED

Instance Attribute Summary

Attributes inherited from SystemMemory

#is_ecc, #size, #speed, #swap_size, #type

Instance Method Summary collapse

Methods inherited from SystemMemory

probe

Constructor Details

#initialize ⇒ LinuxSystemMemory

Returns a new instance of LinuxSystemMemory.



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# File 'lib/memory.rb', line 31

def initialize
  if `which lshw | wc -l | tr -d '[:space:]'` == '0'
    input = ask 'lshw is not installed, would you like to install it (y/n)?'
    if input == 'y'
      puts `sudo apt-get install -y lshw`
    else
      puts 'Cannot proceed without lshw executable, aborting.'
      exit 1
    end
  end

  cmd = "sudo lshw -c memory -short | grep 'System Memory' | " \
        "sed -e 's/.*memory *//' -e 's/GiB//' | awk '{print $1}'"
  @size = `#{cmd}`.to_i

  cmd = 'sudo lshw -c memory -short | grep MHz | '  \
        "sed -e 's/.*memory *//' -e 's/(//' | uniq | cut -f3,5 -d' '"
  @type, @speed, = `#{cmd}`.split ' ', 3
  @speed = @speed.to_i

  cmd = "grep SwapTotal /proc/meminfo | awk '{print $2}'"
  @swap_size = `#{cmd}`.to_i
  @swap_size /= 1_048_576

  cmd = "sudo dmidecode -t memory | grep '[Data|Total] Width' | " \
        "sort |  uniq | cut -d' ' -f 3 | uniq | wc -l"
  @is_ecc = `#{cmd}`.to_i != 1
end