This web mail archive is frozen.
This page is part of a frozen web archive of this mailing list.
You can still navigate around this archive, but know that no new mails
have been added to it since July of 2016.
Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.
> found that running the same source code on these OS, with the same
> versions of of gcc and open-mpi installed on them, gives different
> results than Fedora and Ubuntu after a few hundred iterations. The first
> few hundered iterations are exactly similar to that of Fedora and
> Ubuntu but then it starts giving different results.
Are you also using the same hardware? Different hardware platforms may
exhibit different rounding behaviour. After some dependent interations
such effects might indeed sum up and yield different results. The issue
is called numeric (in)stability and is not specifically related to openmpi.