On Wed, 17 Oct 2018 at 11:42, Kip Ingram <kip.ingram@xxxxxxxxx> wrote: > > Hi guys. Earlier this year I installed fio (from latest source) on a > CentOS 7.4 install, and had nothing but stellar operation - very > smooth, very good. > > Recently I've done the same on a CentOS 7.5 install, and I'm having > difficulties. I've rolled back my target software to known good > (we're storage developers), I've tested with both os drivers and spdk, > and I've tried to roll back the fio snapshot as well, all to no avail. > > The symptom varies depending on whether or not I'm using spdk - > without spdk, I see my performance drop but not to zero, after the > test has run successfully for some random but usually small length of > time. With spdk, I/O seems to stop completely after a similar length > of time. With spdk the fio output line ceases to show ay bandwidth or > IOPS info. The timer will count down to zero, but the job doesn't > stop; the timer just resets itself to some large value and things > continue to run. So the issue only happens only when you use the external spdk plugin? Have you tried talking to the spdk project? > > With spdk, before the problem I can use ctrl-C to interrupt the job; > afterthe problem I can't - I have to use kill -9. > > Tests with spdk's "perf" utility have uniformly seemed to run > perfectly - that's the primary reason I don't believe spdk is the > issue here (well, that and the fact that I also have problems with the > os drivers). The behavior in fio isn't exactly the same with and > without os drivers, but it's problematic in both cases. > > I THINK I have probed old fio build points enough to think that this > isn't arising from a recent change in fio. My main suspicion right > now is that something is different in CentOS 7.5 that fio is unhappy > with - is anyone aware of issues with that particular Linux distro? > > Thanks very much, > Kip It might be worth mentioning this to the fio package's EPEL maintainer in case they know... -- Sitsofe | http://sucs.org/~sits/
