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Welcome to the SummerSchool2013 wiki!
This page defines exercises for the the CSCS-USI 2013 summer school. We would like participants to work in pairs on the exercises, and will try our best to match stronger programmers with less strong ones.
Wireless network: connect to "cscs", use password supplied during lecture.
- Log into Todi:
ssh -Y todi # -Y allows X protocol
At this point you are on log-in node; cross-compiled code will not run here, but rather only on a "compute node"
- Load the module with the GIT version control system
module load git
- Swap in the GNU programming environment
module swap PrgEnv-cray PrgEnv-gnu
- Allocate 1 compute node for your work (valid for one hour). This should suffice for one exercise.
salloc -N 1
With this allocation you should be able to compile and run software interactively. One node provides 16 CPU cores, e.g., for 16 MPI processes each with a single thread, one process with 16 threads, eight processes with two threads each, etc.
- Later in the course you may experiment with the code distributed over multiple nodes, e.g.,
salloc -N 4
4 nodes will sensibly support up to 64 mpi processes, or a combination of processes or threads (but still with maximum 16 threads per nodes, since threads must be in a shared memory space).