diff options
Diffstat (limited to 'psutil/tests/test_linux.py')
| -rwxr-xr-x | psutil/tests/test_linux.py | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/psutil/tests/test_linux.py b/psutil/tests/test_linux.py index 139b32ab..09063416 100755 --- a/psutil/tests/test_linux.py +++ b/psutil/tests/test_linux.py @@ -1090,6 +1090,57 @@ class TestMisc(unittest.TestCase): self.assertEqual(psutil.PROCFS_PATH, '/proc') + def test_cpu_steal_decrease(self): + # Test cumulative cpu stats decrease. We should ignore this. + # See issue #1210. + + def open_mock(name, *args, **kwargs): + if name == "/proc/stat": + return io.BytesIO(textwrap.dedent("""\ + cpu 0 0 0 0 0 0 0 1 0 0 + cpu0 0 0 0 0 0 0 0 1 0 0 + cpu1 0 0 0 0 0 0 0 1 0 0 + """).encode()) + return orig_open(name, *args, **kwargs) + + orig_open = open + patch_point = 'builtins.open' if PY3 else '__builtin__.open' + + with mock.patch(patch_point, create=True, side_effect=open_mock) as m: + # first call to "percent" functions should read the new stat file + # and compare to the "real" file read at import time - so the + # values are meaningless + psutil.cpu_percent() + assert m.called + psutil.cpu_percent(percpu=True) + psutil.cpu_times_percent() + psutil.cpu_times_percent(percpu=True) + + def open_mock(name, *args, **kwargs): + if name == "/proc/stat": + return io.BytesIO(textwrap.dedent("""\ + cpu 1 0 0 0 0 0 0 0 0 0 + cpu0 1 0 0 0 0 0 0 0 0 0 + cpu1 1 0 0 0 0 0 0 0 0 0 + """).encode()) + return orig_open(name, *args, **kwargs) + + with mock.patch(patch_point, create=True, side_effect=open_mock) as m: + # Increase "user" while steal goes "backwards" to zero. + cpu_percent = psutil.cpu_percent() + assert m.called + cpu_percent_percpu = psutil.cpu_percent(percpu=True) + cpu_times_percent = psutil.cpu_times_percent() + cpu_times_percent_percpu = psutil.cpu_times_percent(percpu=True) + self.assertNotEqual(cpu_percent, 0) + self.assertNotEqual(sum(cpu_percent_percpu), 0) + self.assertNotEqual(sum(cpu_times_percent), 0) + self.assertNotEqual(sum(cpu_times_percent), 100.0) + self.assertNotEqual(sum(map(sum, cpu_times_percent_percpu)), 0) + self.assertNotEqual(sum(map(sum, cpu_times_percent_percpu)), 100.0) + self.assertEqual(cpu_times_percent.steal, 0) + self.assertNotEqual(cpu_times_percent.user, 0) + def test_boot_time_mocked(self): with mock.patch('psutil._pslinux.open', create=True) as m: self.assertRaises( |