output.txt

# Eventually some non deterministic difference of signals received
missed signal @cont_count: 428 @usr2_count: 439

signal_handler.rb

@cont_count = 0
@usr2_count = 0
trap("CONT") { @cont_count +=1; }
trap("USR2") { @usr2_count +=1; }

while true
  puts "missed signal @cont_count: #{@cont_count} @usr2_count: #{@usr2_count}" if @cont_count != @usr2_count
end

signal_sender.rb

while true
Process.kill("USR2", pid) #pid of signal_handler.rb
Process.kill("CONT", pid) #pid of signal_handler.rb
end