https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776682#M285 Hi hemantha,<BR /><BR />As I have understood so far you have run non-MPI program.<BR /><BR />Regards!<BR /> Dmitry<BR /> Tue, 13 Dec 2011 07:41:05 GMT Dmitry_K_Intel2 2011-12-13T07:41:05Z https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776681#M284 From what I understand so far, there is no need to have machines.LINUX file if I am running in a single machine. I have a quad core machine and I want to use all cores. But when I run, only one node is used. How do I use all 4 nodes?<BR /><BR />Thank you Tue, 13 Dec 2011 07:10:02 GMT https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776681#M284 hemantha 2011-12-13T07:10:02Z https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776682#M285 Hi hemantha,<BR /><BR />As I have understood so far you have run non-MPI program.<BR /><BR />Regards!<BR /> Dmitry<BR /> Tue, 13 Dec 2011 07:41:05 GMT https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776682#M285 Dmitry_K_Intel2 2011-12-13T07:41:05Z https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776683#M286 Hi Dmitry,<BR /><BR />I was running an MPI program but misunderstood the way it should run on my machine! i am used to using a batch file based submitting in a supercomputer and I forgot to use mpirun command.<BR /><BR />Thanks for the fast reply.<BR /><BR />Hemantha Wed, 14 Dec 2011 02:29:33 GMT https://community.intel.com/t5/Intel-MPI-Library/machines-LINUX-for-a-multicore-machine/m-p/776683#M286 hemantha 2011-12-14T02:29:33Z