Hi, Thanks for your reply. I tried to execute first a process by using
mpirun -machinefile hostfile.txt --slot-list 0:1 -np 1 but it gives the same as error as mentioned previously. Then, I created a rankfile with contents" rank 0=t1.tools.xxx slot=0:0 rank 1=t1.tools.xxx slot=1:0. and the used command mpirun -machinefile hostfile.txt --rankfile my_rankfile.txt -np 2 but ended up getting same error. Is there any patch that I can install in my system to make it topology aware? Thanks On Thu, Mar 17, 2011 at 2:05 PM, Ralph Castain <r...@open-mpi.org> wrote: > The error is telling you that your OS doesn't support queries telling us > what cores are on which sockets, so we can't perform a "bind to socket" > operation. You can probably still "bind to core", so if you know what cores > are in which sockets, then you could use the rank_file mapper to assign > processes to groups of cores in a socket. > > It's just that we can't do it automatically because the OS won't give us > the required info. > > See "mpirun -h" for more info on slot lists. > > On Mar 17, 2011, at 11:26 AM, vaibhav dutt wrote: > > > Hi, > > > > I am trying to perform an experiment in which I can spawn 2 MPI > processes, one on each socket in a 4 core node > > having 2 dual cores. I used the option "bind to socket" which mpirun for > that but I am getting an error like: > > > > An attempt was made to bind a process to a specific hardware topology > > mapping (e.g., binding to a socket) but the operating system does not > > support such topology-aware actions. Talk to your local system > > administrator to find out if your system can support topology-aware > > functionality (e.g., Linux Kernels newer than v2.6.18). > > > > Systems that do not support processor topology-aware functionality cannot > > use "bind to socket" and other related functionality. > > > > > > Can anybody please tell me what is this error about. Is there any other > option than "bind to socket" > > that I can use. > > > > Thanks. > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
