1 #!/usr/bin/python 2 3 __author__ = "kerl (at] google.com, gwendal (at] google.com (Gwendal Grignou)" 4 5 import io 6 import mock 7 import unittest 8 9 from autotest_lib.client.bin import utils 10 11 _IOSTAT_OUTPUT = ( 12 'Linux 3.8.11 (localhost) 02/19/19 _x86_64_ (4 CPU)\n' 13 '\n' 14 'Device tps kB_read/s kB_wrtn/s kB_read kB_wrtn\n' 15 'ALL 4.45 10.33 292.40 665582 188458\n' 16 '\n') 17 18 class TestUtils(unittest.TestCase): 19 """Test utils functions.""" 20 21 # Test methods, disable missing-docstring 22 # pylint: disable=missing-docstring 23 def setUp(self): 24 utils._open_file = self.fake_open 25 # Files opened with utils._open_file will contain this string. 26 self.fake_file_text = '' 27 28 def fake_open(self, path): 29 # Use BytesIO instead of StringIO to support with statements. 30 return io.BytesIO(bytes(self.fake_file_text)) 31 32 def test_concat_partition(self): 33 self.assertEquals("nvme0n1p3", utils.concat_partition("nvme0n1", 3)) 34 self.assertEquals("mmcblk1p3", utils.concat_partition("mmcblk1", 3)) 35 self.assertEquals("sda3", utils.concat_partition("sda", 3)) 36 37 # The columns in /proc/stat are: 38 # user nice system idle iowait irq softirq steal guest guest_nice 39 # 40 # Although older kernel versions might not contain all of them. 41 # Unit is 1/100ths of a second. 42 def test_get_cpu_usage(self): 43 self.fake_file_text = 'cpu 254544 9 254768 2859878 1 2 3 4 5 6\n' 44 usage = utils.get_cpu_usage() 45 self.assertEquals({ 46 'user': 254544, 47 'nice': 9, 48 'system': 254768, 49 'idle': 2859878, 50 'iowait': 1, 51 'irq': 2, 52 'softirq': 3, 53 'steal': 4, 54 'guest': 5, 55 'guest_nice': 6 56 }, usage) 57 58 def test_get_cpu_missing_columns(self): 59 self.fake_file_text = 'cpu 254544 9 254768 2859878\n' 60 usage = utils.get_cpu_usage() 61 self.assertEquals({ 62 'user': 254544, 63 'nice': 9, 64 'system': 254768, 65 'idle': 2859878, 66 'iowait': 0, 67 'irq': 0, 68 'softirq': 0, 69 'steal': 0, 70 'guest': 0, 71 'guest_nice': 0 72 }, usage) 73 74 def test_compute_active_cpu_time(self): 75 start_usage = { 76 'user': 900, 77 'nice': 10, 78 'system': 90, 79 'idle': 10000, 80 'iowait': 500, 81 'irq': 100, 82 'softirq': 50, 83 'steal': 150, 84 'guest': 170, 85 'guest_nice': 30 86 } 87 end_usage = { 88 'user': 1800, 89 'nice': 20, 90 'system': 180, 91 'idle': 13000, 92 'iowait': 2000, 93 'irq': 200, 94 'softirq': 100, 95 'steal': 300, 96 'guest': 340, 97 'guest_nice': 60 98 } 99 usage = utils.compute_active_cpu_time(start_usage, end_usage) 100 self.assertAlmostEqual(usage, 0.25) 101 102 def test_compute_active_cpu_time_idle(self): 103 start_usage = { 104 'user': 900, 105 'nice': 10, 106 'system': 90, 107 'idle': 10000, 108 'iowait': 500, 109 'irq': 100, 110 'softirq': 50, 111 'steal': 150, 112 'guest': 170, 113 'guest_nice':30 114 } 115 end_usage = { 116 'user': 900, 117 'nice': 10, 118 'system': 90, 119 'idle': 11000, 120 'iowait': 1000, 121 'irq': 100, 122 'softirq': 50, 123 'steal': 150, 124 'guest': 170, 125 'guest_nice':30 126 } 127 usage = utils.compute_active_cpu_time(start_usage, end_usage) 128 self.assertAlmostEqual(usage, 0) 129 130 def test_get_mem_total(self): 131 self.fake_file_text = ('MemTotal: 2048000 kB\n' 132 'MemFree: 307200 kB\n' 133 'Buffers: 102400 kB\n' 134 'Cached: 204800 kB\n') 135 self.assertAlmostEqual(utils.get_mem_total(), 2000) 136 137 def test_get_mem_free(self): 138 self.fake_file_text = ('MemTotal: 2048000 kB\n' 139 'MemFree: 307200 kB\n' 140 'Buffers: 102400 kB\n' 141 'Cached: 204800 kB\n') 142 self.assertAlmostEqual(utils.get_mem_free(), 300) 143 144 def test_get_mem_free_plus_buffers_and_cached(self): 145 self.fake_file_text = ('MemTotal: 2048000 kB\n' 146 'MemFree: 307200 kB\n' 147 'Buffers: 102400 kB\n' 148 'Cached: 204800 kB\n') 149 self.assertAlmostEqual(utils.get_mem_free_plus_buffers_and_cached(), 150 600) 151 152 def test_get_meminfo(self): 153 self.fake_file_text = ('MemTotal: 2048000 kB\n' 154 'MemFree: 307200 kB\n' 155 'Buffers: 102400 kB\n' 156 'Cached: 204800 kB\n' 157 'Active(anon): 409600 kB') 158 meminfo = utils.get_meminfo() 159 self.assertEqual(meminfo.MemTotal, 2048000) 160 self.assertEqual(meminfo.Active_anon, 409600) 161 162 def test_get_num_allocated_file_handles(self): 163 self.fake_file_text = '123 0 456\n' 164 self.assertEqual(utils.get_num_allocated_file_handles(), 123) 165 166 @mock.patch('autotest_lib.client.common_lib.utils.system_output') 167 def test_get_storage_statistics(self, system_output_mock): 168 system_output_mock.return_value = _IOSTAT_OUTPUT 169 statistics = utils.get_storage_statistics() 170 self.assertEqual({ 171 'read_kb': 665582.0, 172 'written_kb_per_s': 292.4, 173 'read_kb_per_s': 10.33, 174 'transfers_per_s': 4.45, 175 'written_kb': 188458.0, 176 }, statistics) 177
