[Webhob] Tasks I/O information collected in buildstats

Barros Pena, Belen belen.barros.pena at intel.com
Fri May 31 07:41:18 PDT 2013


On 31/05/2013 15:20, "Paul Eggleton" <paul.eggleton at linux.intel.com> wrote:

>On Friday 31 May 2013 14:05:08 Barros Pena, Belen wrote:
>> We have answered pretty much all questions about task-related
>>information,
>> except one about task Disk I/O. Just wondering if anybody could help us
>> with it.
>> 
>> Looking at the buildstats directory, it looks like we collect a whole
>> bunch of task information that seems disk I/O related:
>> 
>> EndIOinProgress
>> EndReadsComp
>> EndReadsMerged
>> EndSectRead
>> EndSectWrite
>> EndTimeIO
>> EndTimeReads
>> EndTimeWrite
>> EndWTimeIO
>> EndWritesComp
>> StartIOinProgress
>> StartReadsComp
>> StartReadsMerged
>> StartSectRead
>> StartSectWrite
>> StartTimeIO
>> StartTimeReads
>> StartTimeWrite
>> StartWTimeIO
>> StartWritesComp
>> 
>> I have no idea what the above really means, but I wonder if we could use
>> it to calculate a single (yet meaningful) measure of Disk I/O for a
>>given
>> task. What such measure would be and how to calculate it is what I need
>> help with.
>> 
>> Any thoughts?
>
>FYI some hints on some of these from one of Beth's original commits:
>
>http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=b525fc13063a6d68
>1a14c871580efaab458dd370

This really helps. Thanks Paul!

Could Weighted time doing I/O (WTimeIO) be the measure we are looking for?

>
>Cheers,
>Paul
>
>-- 
>
>Paul Eggleton
>Intel Open Source Technology Centre

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