On 06/14/2017 12:33 AM, Sitsofe Wheeler wrote: > On 31 March 2017 at 18:34, Tarek <cashew250@xxxxxxxxx> wrote: >> As an aside to the thread I have going about 0 clat min >> >> Why am I seeing udev events in the BTT summary? Why is systemd-udevd >> generating anything when fio is ran? >> >> Q2C MIN AVG MAX N >> --------------- ------------- ------------- ------------- ----------- >> fio 0.000017381 0.000018851 0.000077907 436012 >> systemd-udevd 0.000012019 0.000150024 0.000481010 76 > > Ulp, you dropped the CC to the mailing list so this disappeared into a > different mailbox that I didn't see until now. Please send fio > questions to the fio mailing list rather than only me directly. > Thanks! > > I'm not sure but perhaps you "inserted" the disk afresh or changed the > sectors where a partition table lives? It could be the case this can > trigger other tools to initiate a rescan to see if new partitions have > arrived and other tasks in turn need to be triggered... Just a guess, but if you are doing a write of any kind, fio will (naturally) open the device read/write. On some systems, this can trigger a partition scan of the device. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
