def windows_worker_pids
      tasklist_output = `tasklist /FI "IMAGENAME eq ruby.exe" /FO list`.encode("UTF-8", Encoding.locale_charmap)
      tasklist_output.split($/).select { |line| line =~ /^PID:/ }.collect { |line| line.gsub(/PID:\s+/, '') }
    end
def windows_worker_pids
      tasklist_output = `tasklist /FI "IMAGENAME eq ruby.exe" /FO list`.encode("UTF-8", Encoding.locale_charmap)
      tasklist_output.split($/).select { |line| line =~ /^PID:/ }.collect { |line| line.gsub(/PID:\s+/, '') }
    end
Returns an Array of string pids of all the other workers on this
 machine. Useful when pruning dead workers on startup.