The first update on the redmine page does describe the source of the issue - although perhaps not in the most user-friendly manner.
Translating it to a simple example, if you have dual-socket 8c nodes and 2 GPUs per node: mpirun -np 4 mdrun -ntomp 4 -gpu_id 0011 #single node 4 ranks per node, 2-way rank-GPU sharing mpirun -np 4 mdrun -ntomp 8 -gpu_id 01 #two nodes 2 ranks per node, no GPU sharing will work, but mpirun -np 8 mdrun -ntomp 4 -gpu_id 0011 #two nodes 4 ranks per node, 2-way rank-GPU sharing will crash. Cheers -- Szilárd On Wed, Dec 4, 2013 at 5:38 PM, João Henriques <joao.henriques.32...@gmail.com> wrote: > I did read it and wasn't very enlightened by it, that's why I kindly > requested for further information on the subject. "under certain > circumstances (but quite often), a segmentation fault occurs" definitely > sounds serious, but it's not very explicit. > > In any case, I'll request a new install and tell them to remove the > previous version form the cluster. We don't want segmentation faults to > happen under certain circumstances :) > > Thank you, > > /J > > > On Wed, Dec 4, 2013 at 2:27 PM, Szilárd Páll <pall.szil...@gmail.com> wrote: > >> On Wed, Dec 4, 2013 at 10:15 AM, João Henriques >> <joao.henriques.32...@gmail.com> wrote: >> > Soon enough we will have daily releases :P >> >> I hope you're not suggesting that we should release less frequently! :) >> >> > Mark, can you please elaborate just a tiny bit longer on how relevant >> were >> > the "GPU-load balancing and GPU-sharing bugs introduced in a bug fix in >> > 4.6.4"? I'm asking this because I just requested the support team at my >> > local cluster to install 4.6.4 and I don't have the nerve to request >> > another install so soon. >> >> As always, read the release notes and if interested in details, links >> to the redmine page of bugs are listed there as well: >> http://www.gromacs.org/About_Gromacs/Release_Notes/Versions_4.6.x >> >> Cheers, >> -- >> Szilárd >> >> > >> > Cheers, >> > >> > /J >> > >> > On Tue, Dec 3, 2013 at 12:41 AM, Mark Abraham <mark.j.abra...@gmail.com >> >wrote: >> > >> >> Hi GROMACS users, >> >> >> >> GROMACS 4.6.5 is officially released. It contains a significant bug fix >> >> when using GPUs in a multi-node simulation, introduced in another recent >> >> bug fix. We encourage all users to upgrade their installations from >> earlier >> >> 4.6.x releases. >> >> >> >> You can find the code, manual, release notes, installation instructions >> and >> >> test suite at the links below. Note that the tests and manual have not >> >> changed since 4.6.4. >> >> >> >> ftp://ftp.gromacs.org/pub/gromacs/gromacs-4.6.5.tar.gz >> >> ftp://ftp.gromacs.org/pub/manual/manual-4.6.5.pdf >> >> >> >> >> http://www.gromacs.org/About_Gromacs/Release_Notes/Versions_4.6.x#Release_notes_for_4.6.5 >> >> http://www.gromacs.org/Documentation/Installation_Instructions >> >> http://gromacs.googlecode.com/files/regressiontests-4.6.5.tar.gz >> >> >> >> Happy simulating! >> >> >> >> Mark Abraham >> >> >> >> GROMACS development manager >> >> -- >> >> Gromacs Users mailing list >> >> >> >> * Please search the archive at >> >> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before >> >> posting! >> >> >> >> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists >> >> >> >> * For (un)subscribe requests visit >> >> https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or >> >> send a mail to gmx-users-requ...@gromacs.org. >> >> >> > -- >> > Gromacs Users mailing list >> > >> > * Please search the archive at >> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before >> posting! >> > >> > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists >> > >> > * For (un)subscribe requests visit >> > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or >> send a mail to gmx-users-requ...@gromacs.org. >> -- >> Gromacs Users mailing list >> >> * Please search the archive at >> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before >> posting! >> >> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists >> >> * For (un)subscribe requests visit >> https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or >> send a mail to gmx-users-requ...@gromacs.org. >> > -- > Gromacs Users mailing list > > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a > mail to gmx-users-requ...@gromacs.org. -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
