def test_calculate_pcpu(self):
"""
This calculates the pcpu based on 10000 jiffies allocated to a process
over 50000 jiffies.
This should be cpu utilisation of 20%
"""
self.assertEqual(calculate_pcpu(8000, 2000, 1000, 50000, 100), 20.0)
def test_calculate_pcpu_capped(self):
"""
This calculates the pcpu based on 100000 jiffies allocated to a process
over 50000 jiffies.
This should be cpu utilisation of 200% but capped at 99% CPU
utilisation.
"""
self.assertEqual(calculate_pcpu(98000, 2000, 1000, 50000, 100), 99.0)
def test_calculate_pcpu_floored(self):
"""
This calculates the pcpu based on 1 jiffies allocated to a process
over 80 jiffies this should be negative, but floored to 0.0.
"""
self.assertEqual(calculate_pcpu(1, 0, 50, 800, 10), 0.0)
def test_calculate_pcpu_real_data(self):
self.assertEqual(calculate_pcpu(51286, 5000, 19000.07, 9281.0, 100),
3.0)