[igt-dev] [PATCH i-g-t] runner/resultgen: Provide output when test output is completely empty

[Petri Latvala]

On Wed, Feb 19, 2020 at 01:23:22PM +0000, Chris Wilson wrote:
> Quoting Petri Latvala (2020-02-19 12:19:40)
> > If a machine is hard-hanging or otherwise rebooted at the correct
> > time, intermediary output files get created but nothing ever gets
> > written to them. That yields results that are completely empty and
> > hard to categorize or even sometimes detect automatically. Handle this
> > corner case explicitly with a custom text explaining what might have
> > happened to prod result analysis towards fixing the real issue instead
> > of wondering if test result processing is faulty.
> > 
> > The race for getting empty files is easier to hit than it seems. The
> > files get created by the runner before calling exec(), and there's
> > plenty of time to hit a really hard crash.
> 
> Speaking of which, it would not be terrible if igt_runner periodically
> called sync() everytime it decided there were new logs to preserve.
> We should also probably remove/reduce the writeback delay.


Does calling sync() sync more than fsyncdata()?


-- 
Petri Latvala