I’m not sure how to interpret their claim. They say it has native support for little endian, fact that was true for quite some time (http://en.wikipedia.org/wiki/PowerPC#Endian_modes). Unfortunately, I could not find any indication about the possible overhead of running little-endian applications on a big-endian OS.
George. On Apr 28, 2014, at 10:09 , Atchley, Scott <atchle...@ornl.gov> wrote: > Hi George, > > The Power8 can run in little-endian mode without penalty: > > http://www.hpcwire.com/2014/04/23/power8-openpower-might-mean-hpc/ > > Not saying hetero support is unneeded, but this case may not be it. > > Scott > > On Apr 24, 2014, at 12:54 PM, George Bosilca <bosi...@icl.utk.edu> wrote: > >> There seems to be an opportunity to still have heterogeneous environment in >> the future. >> http://www.enterprisetech.com/2014/04/23/ibm-google-show-power8-systems-openpower-efforts/ >> >> I don’t think it is fair to shift the burden on the original developer >> instead of the committer who broke a feature. >> >> George. >> >> On Apr 23, 2014, at 09:49 , Jeff Squyres (jsquyres) <jsquy...@cisco.com> >> wrote: >> >>> WHAT: Remove data-heterogeneous support from Open MPI >>> >>> WHY: No one uses it (it's not the default), it's broken (probably has been >>> for a while) >>> >>> WHERE: Datatype engine, some configury, and a few other places >>> >>> TIMEOUT: Tuesday teleconf, 6 May 2014 (i.e., 2 weeks from now) >>> >>> MORE DETAIL: >>> >>> It recently came to my attention that we seem to have some bit rot in the >>> heterogeneous data representation support such that if you configure with >>> --enable-heterogeneous, even if you run on homogeneous machines, you can >>> get segv's with tcp,sm,self. >>> >>> The heterogeneous support has never been enabled by default. AFAIK, only >>> Cisco tests it regularly in its MTT. I'm be greatly surprised if many >>> (any?) users use it at all. >>> >>> So I have to ask myself: why do we keep this functionality around? It >>> seems like we should delete this code, simplify things a little, and move >>> on. >>> >>> Comments? >>> >>> -- >>> Jeff Squyres >>> jsquy...@cisco.com >>> For corporate legal information go to: >>> http://www.cisco.com/web/about/doing_business/legal/cri/ >>> >>> _______________________________________________ >>> devel mailing list >>> de...@open-mpi.org >>> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel >>> Link to this post: >>> http://www.open-mpi.org/community/lists/devel/2014/04/14584.php >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel >> Link to this post: >> http://www.open-mpi.org/community/lists/devel/2014/04/14594.php > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2014/04/14627.php
