text: #!/usr/bin/env python
  
  import sys
  from numpy import genfromtxt
  import matplotlib.pyplot as plt
  
  data = genfromtxt(sys.stdin, skip_header=1, delimiter=',')
  plt.plot(data[:, 0], data[:, 1])
  plt.xlabel('num_procs')
  plt.ylabel('bcast_gather_time')
  
  plt.show()
  