An internal malloc failed then. That would explain why your malloc failed too. It looks like you malloc'ed too much memory in your program?
Brice Le 05/09/2012 15:56, Gabriele Fatigati a écrit : > An update: > > placing strerror(errno) after hwloc_set_area_membind_nodeset gives: > "Cannot allocate memory" > > 2012/9/5 Gabriele Fatigati <g.fatig...@cineca.it > <mailto:g.fatig...@cineca.it>> > > Hi, > > I've noted that hwloc_set_area_membind_nodeset return -1 but errno > is not equal to EXDEV or ENOSYS. I supposed that these two case > was the two unique possibly. > > From the hwloc documentation: > > -1 with errno set to ENOSYS if the action is not supported > -1 with errno set to EXDEV if the binding cannot be enforced > > > Any other binding failure reason? The memory available is enought. > > 2012/9/5 Brice Goglin <brice.gog...@inria.fr > <mailto:brice.gog...@inria.fr>> > > Hello Gabriele, > > The only limit that I would think of is the available physical > memory on each NUMA node (numactl -H will tell you how much of > each NUMA node memory is still available). > malloc usually only fails (it returns NULL?) when there no > *virtual* memory anymore, that's different. If you don't > allocate tons of terabytes of virtual memory, this shouldn't > happen easily. > > Brice > > > > > Le 05/09/2012 14:27, Gabriele Fatigati a écrit : >> Dear Hwloc users and developers, >> >> >> I'm using hwloc 1.4.1 on a multithreaded program in a Linux >> platform, where each thread bind many non contiguos pieces of >> a big matrix using in a very intensive way >> hwloc_set_area_membind_nodeset function: >> >> hwloc_set_area_membind_nodeset(topology, punt+offset, len, >> nodeset, HWLOC_MEMBIND_BIND, HWLOC_MEMBIND_THREAD | >> HWLOC_MEMBIND_MIGRATE); >> >> Binding seems works well, since the returned code from >> function is 0 for every calls. >> >> The problems is that after binding, a simple little new >> malloc fails, without any apparent reason. >> >> Disabling memory binding, the allocations works well. Is >> there any knows problem if hwloc_set_area_membind_nodeset is >> used intensively? >> >> Is there some operating system limit for memory pages binding? >> >> Thanks in advance. >> >> -- >> Ing. Gabriele Fatigati >> >> HPC specialist >> >> SuperComputing Applications and Innovation Department >> >> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >> >> www.cineca.it <http://www.cineca.it> >> Tel: +39 051 6171722 <tel:%2B39%20051%206171722> >> >> g.fatigati [AT] cineca.it <http://cineca.it> >> >> >> _______________________________________________ >> hwloc-users mailing list >> hwloc-us...@open-mpi.org <mailto:hwloc-us...@open-mpi.org> >> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users > > > > > -- > Ing. Gabriele Fatigati > > HPC specialist > > SuperComputing Applications and Innovation Department > > Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy > > www.cineca.it <http://www.cineca.it> Tel: +39 > 051 6171722 <tel:%2B39%20051%206171722> > > g.fatigati [AT] cineca.it <http://cineca.it> > > > > > -- > Ing. Gabriele Fatigati > > HPC specialist > > SuperComputing Applications and Innovation Department > > Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy > > www.cineca.it <http://www.cineca.it> Tel: +39 051 > 6171722 > > g.fatigati [AT] cineca.it <http://cineca.it>
