[igt-dev] ✗ Fi.CI.IGT: failure for tests/perf_pmu: Avoid off-lining all CPUs

[Chris Wilson]

Quoting Tvrtko Ursulin (2018-02-19 17:53:06)
> 
> On 19/02/2018 16:07, Chris Wilson wrote:
> > Quoting Patchwork (2018-02-19 15:55:19)
> >> Test perf_pmu:
> >>          Subgroup cpu-hotplug:
> >>                  incomplete -> SKIP       (shard-apl) fdo#104965
> >>          Subgroup other-read-1:
> >>                  pass       -> FAIL       (shard-apl)
> > 
> > I guess that's the expected fallout from deciding to skip after trying
> > to offline a cpu.
> 
> Kind of expected because I am not quite sure why it behaves differently 
> from the existing code which has igt_assert on the write. Maybe I am 
> particularly blind today.
> 
> > I also guess that makes it a no-go (without some tweaking) if we cause
> > random fallout in subsequent tests, i.e. unpredictable flip-flops.
> 
> Yep agreed 100%.
> 
> Sounds like a case for igt_fail2 = please reboot me, or igt_wedge_machine.

Indeed, igt_sysrq_reboot() sounds like a useful intermediate patch.
-Chris