Re: [PATCH igt 03/24] lib: Enable automatic ftrace dumping for suspend failures

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Quoting Daniel Vetter (2017-08-15 09:45:48)
> On Mon, Aug 14, 2017 at 10:00:24PM +0100, Chris Wilson wrote:
> > Quoting Chris Wilson (2017-08-14 21:18:27)
> > > Supplement dmesg with the function call graph to try and help identify
> > > why the suspend failed. On the other hand, it may be very noisy and
> > > perturb the system due to its overhead...
> > 
> > And it appears ftrace is not stable enough to use across CI.
> > Interesting.
> 
> Hm, should we instead have an --enable-ftrace flag for igt tests? Means we
> need to do a manual run to capture the failures, but might be the better
> balance ...

The infrastructure is fine by itself, so I was just considering sending
it to the farm as required. Improving ftrace would also be sensible, but
likely not an easy task.
-Chris
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