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Welcome to the FoMICS Autumn School GPU_Libraries_2013 wiki!

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This page contains exercises and other information for the the FoMICS Autumn School 2013 on GPU-enabled libraries, given at the Universita Svizzera Italiana (USI) on Sep. 14-15, 2013, as a prelude to the Domain Decomposition 22 Conference.

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Course Schedule

Exercises

• 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).
Wireless network: connect to "cscs", use password supplied during lecture.