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1 # Copyright (c) 2012 The Chromium Authors. All rights reserved. |
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2 # Use of this source code is governed by a BSD-style license that can be |
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3 # found in the LICENSE file. |
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4 |
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5 """Provides an interface to communicate with the device via the adb command. |
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6 |
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7 Assumes adb binary is currently on system path. |
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8 """ |
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9 |
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10 |
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11 import collections |
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12 |
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13 |
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14 def ParseIoStatsLine(line): |
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15 """Parses a line of io stats into a IoStats named tuple.""" |
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16 # Field definitions: http://www.kernel.org/doc/Documentation/iostats.txt |
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17 IoStats = collections.namedtuple('IoStats', |
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18 ['device', |
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19 'num_reads_issued', |
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20 'num_reads_merged', |
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21 'num_sectors_read', |
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22 'ms_spent_reading', |
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23 'num_writes_completed', |
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24 'num_writes_merged', |
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25 'num_sectors_written', |
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26 'ms_spent_writing', |
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27 'num_ios_in_progress', |
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28 'ms_spent_doing_io', |
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29 'ms_spent_doing_io_weighted', |
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30 ]) |
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31 fields = line.split() |
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32 return IoStats._make([fields[2]] + [int(f) for f in fields[3:]]) |