Re: [xen-unstable test] 57852: regressions - FAIL

[Ian Campbell <ian.campbell@citrix.com>]

On Tue, 2015-06-09 at 10:29 +0100, Jan Beulich wrote:
> >>> On 09.06.15 at 10:26, <ian.campbell@citrix.com> wrote:
> > On Mon, 2015-06-08 at 13:16 +0100, Ian Campbell wrote:
> > 
> >> The adhoc run passed, but that's not statistically significant.
> > 
> > I ran a bunch more in this no-apicv configuration, the logs are at
> > http://logs.test-lab.xenproject.org/osstest/logs/<NNNN>:
> > 
> > Flight	Host	Failed at
> > 58190	fiano0	ts-guest-stop
> > 58198	fiano0	ts-guest-stop
> > 58203	fiano0	ts-windows-install
> > 58208	fiano0	ts-guest-stop
> > 58210	fiano1	ts-guest-stop
> > 58214	fiano1	ts-guest-stop
> > 58217	fiano1	ts-guest-stop
> > 
> > I think that's not sufficient data to draw a conclusion, since there was
> > always a small background failure rate. I'm going to run another half
> > dozen (3 on each).
> 
> At least the one failure is following the patterns of previous ones
> (ping timing out and guest sitting with both of its vCPU-s on HLT,
> and the last VM entry having delivered a timer interrupt). Without
> knowing _when_ that last timer interrupt got injected and whether
> other interrupts are occurring for the guest as necessary, that
> again doesn't mean much.

58243	fiano0	ts-guest-stop
58251	fiano0	ts-guest-stop
58258	fiano0	ts-guest-stop
58266	fiano1	ts-guest-stop
58279	fiano1	ts-guest-stop
58282	fiano1	ts-guest-stop

> > I'm also going to run some on another pair of hosts without no-apicv. I
> > chose elbling[01] since according to
> > http://logs.test-lab.xenproject.org/osstest/results/history.test-amd64-amd64 
> > -xl-qemuu-win7-amd64.html it has been used a few times on various branches 
> > and hasn't so far failed a ts-windows-install. It looks to have the same set 
> > of advanced features as fiano*:
> 
> That's a good idea, thanks.

58244	elbling0	ts-guest-stop
58250	elbling0	ts-guest-stop
58256	elbling0	ts-guest-stop
58261	elbling1	ts-guest-stop
58269	elbling1	ts-guest-stop
58274	elbling1	ts-guest-stop

So it is looking awfully like a host specific issue with apicv on
fiano*.

Ian.