Class: Distem::DataCollection::ProbeBW

Inherits:

Probe

• Object
• Probe
• Distem::DataCollection::ProbeBW

show all

Defined in:

lib/distem/datacollection/probe_bw.rb

Instance Attribute Summary

Attributes inherited from Probe

#data

Instance Method Summary (collapse)

• - (Object) get_value
• - (ProbeBW) initialize(drift, data, opts) constructor

  A new instance of ProbeBW.

Methods inherited from Probe

#restart, #run, #stop

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# File 'lib/distem/datacollection/probe_bw.rb', line 9

def initialize(drift, data, opts)
  super(drift, data, opts)
  @last_tx = 0
  @last_rx = 0
end

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# File 'lib/distem/datacollection/probe_bw.rb', line 15

def get_value
  iface = @opts['interface']
  output = `cat /proc/net/dev`.split(/\n/).grep(/#{iface}/).first
  filter = output.gsub(iface,'').scan(/\d+/)
  rx = filter[0].to_i
  tx = filter[8].to_i
  if (@last_rx == 0)
    ret = nil
  else
    ret = [@frequency * (rx - @last_rx), @frequency * (tx - @last_tx)]
  end
  @last_rx = rx
  @last_tx = tx
  return ret
end