On Tue, Dec 11, 2012 at 6:49 PM, Mirco Wahab < mirco.wa...@chemie.tu-freiberg.de> wrote:
> Am 11.12.2012 16:04, schrieb Szilárd Páll: > > It looks like some gcc 4.7-s don't work with CUDA, although I've been >> using >> various Ubuntu/Linaro versions, most recently 4.7.2 and had no >> issues whatsoever. Some people seem to have bumped into the same problem >> (see http://goo.gl/1onBz or http://goo.gl/JEnuk) and the suggested fix is >> to put >> #undef _GLIBCXX_ATOMIC_BUILTINS >> #undef _GLIBCXX_USE_INT128 >> in a header and pre-include it for nvcc by calling it like this: >> nvcc --pre-include undef_atomics_int128.h >> > > The same problem occurs in SuSE 12.2/x64 with it's default 4.7.2 > (20120920). > > Another possible fix on SuSE 12.2: install the (older) gcc repository > from 12.1/x64 (with lower priority), install the gcc/g++ 4.6 from there > as an alternative compiler and select the "active gcc" through the > "update-alternatives --config gcc" mechanism. This works very well. > Thanks for the info. The Ubuntu/Linaro version must have a fix for this. Unfortunately, we can't do much about it and gcc 4.7 is anyway blocked by the CUDA 5.0 headers. FYI: Verlet scheme nonbonded kernels (and probably the group scheme as well), especially with AVX, can be quite a bit slower with older gcc versions. I find it really annoying (and stupid) that NVIDIA did not fix their compiler to work with gcc 4.7 which had already been out for almost a half a year at the time of the CUDA 5.0 release. -- Szilárd > > Regards > > M. > > > -- > gmx-users mailing list gmx-users@gromacs.org > http://lists.gromacs.org/**mailman/listinfo/gmx-users<http://lists.gromacs.org/mailman/listinfo/gmx-users> > * Please search the archive at http://www.gromacs.org/** > Support/Mailing_Lists/Search<http://www.gromacs.org/Support/Mailing_Lists/Search>before > posting! > * Please don't post (un)subscribe requests to the list. Use the www > interface or send it to gmx-users-requ...@gromacs.org. > * Can't post? Read > http://www.gromacs.org/**Support/Mailing_Lists<http://www.gromacs.org/Support/Mailing_Lists> > -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! * Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
