Class: OsCtl::Lib::CpuTopology

Inherits:
Object
  • Object
show all
Defined in:
lib/libosctl/cpu_topology.rb

Defined Under Namespace

Classes: Cpu, Package

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CpuTopology

Returns a new instance of CpuTopology.



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# File 'lib/libosctl/cpu_topology.rb', line 21

def initialize
  parse
end

Instance Attribute Details

#cpus ⇒ Hash<Integer, Cpu> (readonly)

Returns:

  • (Hash<Integer, Cpu>) 


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# File 'lib/libosctl/cpu_topology.rb', line 19

def cpus
  @cpus
end

#packages ⇒ Hash<Integer, Package> (readonly)

Returns:



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# File 'lib/libosctl/cpu_topology.rb', line 16

def packages
  @packages
end

Instance Method Details

#parse ⇒ Object (protected) 



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# File 'lib/libosctl/cpu_topology.rb', line 27

def parse
  @packages = {}
  @cpus = {}

  sys_dir = '/sys/devices/system/cpu'
  cpu_list = []

  Dir.glob(File.join(sys_dir, 'cpu*')).each do |f|
    next unless %r{/cpu(\d+)$} =~ f

    cpu_list << ::Regexp.last_match(1).to_i
  end

  cpu_list.sort.each do |cpu_id|
    begin
      online = File.read(File.join(sys_dir, "cpu#{cpu_id}", 'online')).strip
      next if online != '1'
    rescue Errno::ENOENT
      # If online file does not exist, we assume it is online
    end

    pkg_id = File.read(File.join(sys_dir, "cpu#{cpu_id}", 'topology/physical_package_id')).strip.to_i

    cpu = Cpu.new(id: cpu_id, package_id: pkg_id)

    @cpus[cpu.id] = cpu

    @packages[pkg_id] ||= Package.new(id: pkg_id, cpus: {})
    @packages[pkg_id].cpus[cpu.id] = cpu
  end
end