UPC
Unified Parallel C (UPC) is an extension of the C programming language designed for high performance computing on large-scale parallel machines.The language provides a uniform programming model for both shared and distributed memory hardware. The programmer is presented with a single shared, partitioned address space, where variables may be directly read and written by any processor, but each variable is physically associated with a single processor. UPC uses a Single Program Multiple Data (SPMD) model of computation in which the amount of parallelism is fixed at program startup time, typically with a single thread of execution per processor.
Installed on blacklight and salk.
Blacklight version
SGI UPC is installed on blacklight.
To use UPC:
- Load the UPC module.
module load sgi-upc-devel
- Compile your code with
sgiupcsgiupc prog.c -o prog
- Create a batch job to do the following things:
- Set up the module command.
- Load the UPC module
module load sgi-upc-devel
- Run the job with mpirun
mpirun -np $PBS_NCPUS ./prog
- Submit the job with the qsub command. See the qsub documentation on blacklight for more information.
Salk version
The version installed is Berkeley Unified Parallel C compiler 2.6.0.
The upcc executables are in /usr/local/packages/bupc-2.6.0/bin.
The number of threads can be specified at compilation or at run time.
At compilation:
/usr/local/packages/bupc-2.6.0/bin/upcc -pthreads=2 prog.upc /usr/local/packages/bupc-2.6.0/bin/upcrun prog
At run time:
/usr/local/packages/bupc-2.6.0/bin/upcc -pthreads prog.upc /usr/local/packages/bupc-2.6.0/bin/upcrun -n 2 prog
