[ responding to the two months worth flood of email that just
  resulted from https://bugzilla.mozilla.org/show_bug.cgi?id=891906 ]

On Thursday 2013-05-30 14:51 -0400, Armen Zambrano G. wrote:
> We have found that sometimes we fail our reftest tests due to a
> couple of pixels getting store in bad sectors on the RAM of our
> machines.
> We have also seen garbage collection crashes due to it.
> 
> We have also recently discovered that memtest has done a better job
> at catching bad RAM compared to Apple and other diagnostic tools.
> 
> The new problem we have is that it also started happening on Windows
> iX machines (one machine so far).
> 
> Do you have any ideas on how to make our tests to handle this
> problem in a better way?

I don't see a reasonable way for the tests to handle the problem.

However, we can certainly do more to detect which failures are
caused by it, particularly after the fact.  See, for example, the
script in:
  https://hg.mozilla.org/users/dbaron_mozilla.com/bad-slaves/
which was written for:
  https://bugzilla.mozilla.org/show_bug.cgi?id=787281
and could certainly be improved further.

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                           http://www.mozilla.org/   𝄂
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