On Fri, May 31, 2013 at 7:41 AM, Barros Pena, Belen <[email protected]> wrote: > On 31/05/2013 15:20, "Paul Eggleton" <[email protected]> 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. >>>
So, all of this comes from iostats in the kernel. For full documentation see: https://www.kernel.org/doc/Documentation/iostats.txt I think what you're probably looking for is the difference between EndTimeIO and StartTimeIO... -b >>> 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 > > --------------------------------------------------------------------- > Intel Corporation (UK) Limited > Registered No. 1134945 (England) > Registered Office: Pipers Way, Swindon SN3 1RJ > VAT No: 860 2173 47 > > This e-mail and any attachments may contain confidential material for > the sole use of the intended recipient(s). Any review or distribution > by others is strictly prohibited. If you are not the intended > recipient, please contact the sender and delete all copies. -- Elizabeth Flanagan Yocto Project Build and Release _______________________________________________ webhob mailing list [email protected] https://lists.yoctoproject.org/listinfo/webhob
