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> > 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 Tel: +39 051 6171722 > > g.fatigati [AT] cineca.it > > > _______________________________________________ > hwloc-users mailing > listhwloc-users@open-mpi.orghttp://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 Tel: +39 051 6171722 g.fatigati [AT] cineca.it
