def test_telemetry_in_place_leaf_cgroup(self):
"""
Ensure this leaf (i.e. not root of cgroup tree) cgroup has distinct metrics from the root cgroup.
"""
# Does nothing on systems where the default cgroup for a randomly-created process (like this test invocation)
# is the root cgroup.
cg = make_self_cgroups()
root = make_root_cgroups()
if cg.cgroups['cpu'] != root.cgroups['cpu']:
ct = CGroupsTelemetry("test", cg)
cpu = CpuCgroup(ct)
self.assertLess(cpu._current_cpu_total, cpu._current_system_cpu)
consume_cpu_time() # Eat some CPU
time.sleep(1) # Generate some idle time
cpu._update_cpu_data()
self.assertLess(cpu._current_cpu_total, cpu._current_system_cpu)
def test_telemetry_inplace(self):
"""
Test raw measures and basic statistics for the cgroup in which this process is currently running.
"""
cg = make_self_cgroups()
self.assertIn('cpu', cg.cgroups)
self.assertIn('memory', cg.cgroups)
ct = CGroupsTelemetry("test", cg)
cpu = CpuCgroup(ct)
self.assertGreater(cpu._current_system_cpu, 0)
consume_cpu_time() # Eat some CPU
cpu._update_cpu_data()
self.assertGreater(cpu._current_cpu_total, cpu._previous_cpu_total)
self.assertGreater(cpu._current_system_cpu, cpu._previous_system_cpu)
percent_used = cpu._get_cpu_percent()
self.assertGreater(percent_used, 0)
def test_cpu_telemetry(self):
"""
Test Cpu telemetry class
"""
cg = make_self_cgroups()
self.assertIn('cpu', cg.cgroups)
ct = CGroupsTelemetry('test', cg)
self.assertIs(cg, ct.cgroup)
cpu = CpuCgroup(ct)
self.assertIs(cg, cpu.cgt.cgroup)
ticks_before = cpu._current_cpu_total
consume_cpu_time()
time.sleep(1)
cpu._update_cpu_data()
ticks_after = cpu._current_cpu_total
self.assertGreater(ticks_after, ticks_before)
p2 = cpu._get_cpu_percent()
self.assertGreater(p2, 0)
# when running under PyCharm, this is often > 100
# on a multi-core machine
self.assertLess(p2, 200)