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qa/842 failing on Mac OS X ... wrong values from pmiostat

To: PCP <pcp@xxxxxxxxxxx>
Subject: qa/842 failing on Mac OS X ... wrong values from pmiostat
From: Ken McDonell <kenj@xxxxxxxxxxxxxxxx>
Date: Thu, 17 Mar 2016 08:59:10 +1100
Delivered-to: pcp@xxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0
On Ubuntu ...

kenj@bozo:~/src/pcp/qa/archives$ pmiostat -t 1 -a dm-io -xt,h | head -8
Fri Aug  1 14:34:51 2014 sda              0.0     0.0    0.0    0.0      0.0    
  0.0     0.00     0.00     0.0     0.0     0.0   0.0
Fri Aug  1 14:34:51 2014 sdb              0.0     0.0    5.0    6.0     24.0    
  8.0     2.91     0.00     0.4     0.4     0.3   0.4
Fri Aug  1 14:34:52 2014 sda              0.0     0.0   24.0    0.0    816.0    
  0.0    34.00     0.23     9.6     9.6     0.0  19.0
Fri Aug  1 14:34:52 2014 sdb              5.0     0.0 1308.0    5.0  53363.0    
  7.0    40.65     1.15     0.9     0.9     0.2  61.1
Fri Aug  1 14:34:53 2014 sda              0.0     0.0    7.0    0.0    517.0    
  0.0    73.86     0.09    12.1    12.1     0.0   6.2
Fri Aug  1 14:34:53 2014 sdb              1.0     0.0 1867.0    6.0  20462.0    
  8.0    10.93     0.80     0.4     0.4    14.3  64.1
Fri Aug  1 14:34:54 2014 sda              0.0     1.0    8.0   11.0   1048.0    
279.0    69.84     0.13     6.7    11.5     3.2   7.2
Fri Aug  1 14:34:54 2014 sdb              1.0     0.0  935.0   11.0  12795.0    
107.0    13.64     0.93     1.0     0.6    33.2  55.6
kenj@bozo:~/src/pcp/qa/archives$ 

and on Mac OS X

fuji:archives kenj$ pmiostat -t 1 -a dm-io -xt,h | head -8 
Fri Aug  1 14:34:51 2014 sda              0.0     0.0    0.0    0.0      0.0    
  0.0     0.00     0.00     0.0     0.0     0.0   0.0
Fri Aug  1 14:34:51 2014 sdb              0.0     0.0    5.0    6.0     24.0    
  8.0     2.91     0.00     0.4     0.4     0.3   0.4
Fri Aug  1 14:34:52 2014 sda              0.0     0.0    0.0    0.0      0.2    
  0.0    34.00     0.00     9.6     9.6     0.0   0.0
Fri Aug  1 14:34:52 2014 sdb              0.0     0.0    0.3    0.0     12.4    
  0.0    40.65     0.00     0.9     0.9     0.2   0.0
Fri Aug  1 14:34:53 2014 sda                ?       ?      ?      ?        ?    
    ?        ?        ?       ?       ?       ?     ?
Fri Aug  1 14:34:53 2014 sdb                ?       ?      ?      ?        ?    
    ?        ?        ?       ?       ?       ?     ?
Fri Aug  1 14:34:54 2014 sda              0.0     1.0    8.0   11.0   1048.0    
279.0    69.84     0.13     6.7    11.5     3.2   7.2
Fri Aug  1 14:34:54 2014 sdb              1.0     0.0  935.0   11.0  12795.0    
107.0    13.64     0.93     1.0     0.6    33.2  55.6
fuji:archives kenj$ 

There are no <mark> records in this archive and the data looks good in the time 
region in question ...

14:34:52.350  60.0.4 (disk.dev.read):
                inst [0 or "sda"] value 15954
                inst [1 or "sdb"] value 28066

14:34:53.443  60.0.4 (disk.dev.read):
                inst [0 or "sda"] value 15960
                inst [1 or "sdb"] value 30177

14:34:54.956  60.0.4 (disk.dev.read):
                inst [0 or "sda"] value 15974
                inst [1 or "sdb"] value 31224

Hard to see how this is a QA problem, so looks like a real code issue here ... 
another problem delivered on the cart labeled Python?

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