[Webhob] Tasks I/O information collected in buildstats
elizabeth.flanagan at intel.com
Fri May 31 17:57:53 PDT 2013
On Fri, May 31, 2013 at 7:41 AM, Barros Pena, Belen
<belen.barros.pena at intel.com> wrote:
> 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
>>> 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:
>>> 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
>>> task. What such measure would be and how to calculate it is what I need
>>> help with.
So, all of this comes from iostats in the kernel. For full documentation see:
I think what you're probably looking for is the difference between
EndTimeIO and StartTimeIO...
>>> Any thoughts?
>>FYI some hints on some of these from one of Beth's original commits:
> This really helps. Thanks Paul!
> Could Weighted time doing I/O (WTimeIO) be the measure we are looking for?
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