[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH OSSTEST] ts-debian-install: increase time allowed for xen-create-image
On Fri, 2016-01-15 at 13:35 +0000, Ian Campbell wrote: > This step is consistently timing out when run on cubietruck-*. > Judging > from the logs it appears to be completing during the 30s slack added > by tcmdex (i.e. after the timeout message the rest of the output > appears in the test step log). > > Looking at the results on arndale-* (which looks to pass reasonably > reliably) I see that the regular test-armhf-armhf-xl job takes around > 550s to do the xen-create-image while test-armhf-armhf-xl-rtds > typically takes around 1100s (twice as long). > > On cubietruck-braque test-armhf-armhf-xl uses 900s. One could > therefore extrapolate that test-armhf-armhf-xl-rtds might need more > than 1800s and not be too surprised that it appears to need something > a bit more than 2000s in practice. 2500s seems like sufficient > headroom. > > For comparisson with arm on x86 godello takes around 210s in the > normal case and 680s with RTDS (>3x slower) while nocera takes 265s > and 640s (2.4x). (Those are from nearby but not identical flights in > order to match up the host). > > Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> > Reviewed-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx> > --- > Dario, Meng, I suppose a 2-3x slow down with RTDS on a dom0 operation > (with no domains running) such as xen-create-image is not unexpected? > Yes, as of now, I think it is. RTDS' default scheduling parameters throttle domains' vcpus to max 40% of CPU, non work conserving mode (i.e.m, they only consume up to that much even if there is idle time). I think this will have to change at some point, but for now, slowdowns for operation like the ones in xen-create-image are to be expected, and this patch looks therefore ok to me. Thanks and Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) Attachment:
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