Parallel runs do not have bitwise agreement

Question

Parallel runs do not have bitwise agreement

Closed this issue 6 years ago · 1 comments

At one time, results from runs on different proc counts agreed to machine precision. This no longer seems to be the case. Look into this!

Answer 1 · 2018-09-12T20:00:18.000Z

There is a difference between the asynchronous ghost fill routine and the non-async ghost fill. With the async ghost fill (the one that is the most well tested), the results compare exactly. Clear that the logic in these two is different, but not clear where. This will be a separate issue.