On 22/05/18 12:11 PM, Xiaoye S. Li wrote:
> Default setting is to use sequential symbolic factorization, precisely
> due to the ParMETIS bugs.
Ok,
and I saw you reported the bug "a few years ago" and still have not
received a fix...
I would like to "live with the patch" (ie working in sequential) but our
problem is that if we compute err=|Ax-b|, the resolution with
*sequential* symbolic factorisation gives ans err around 1e-6 instead of
1e-16 for parallel one (when it works). MUMPS, also gives 1e-16 error
levels.
In our nightly tests we have to compare computed solutions and they are
now acceptable if they are of the order of 1e-15. I do *not* want to
raise this comparison to 1e-6 just because there is a bug in parmetis
which forces us to use the "unprecise" sequential options...
In other words, I am kind of "stuck" with this non-fixed bug now... :/
Hope this can be fixed...
Thanks,
Eric
