Writing SHMEM programs

• Basic SHMEM concepts: The SHMEM programming model.
• SHMEM initialization and termination functions shmem_{initialize, finalize}
• SHMEM data movement functions: shmem_{get, put, swap, broadcast}
• SHMEM synchronization functions: shmem_{wait, barrier}
• Other SHMEM functions: shmem_{int, double}_all_to_all, my_pe, num_pes
• Differences between HPVM and SGI/Cray SHMEM: API differences.
• A Complete SHMEM Example: Code and Makefile

This section discusses the basic SHMEM C interface. The Fortran interface is similar to the C interface with the following key differences:

• The constant values do not have a leading underscore (e.g. _SHMEM_SYNC_VALUE becomes SHMEM_SYNC_VALUE).
• The double precision reduction routines have real8 in their names instead of double (e.g. shmem_real8_sum_to_all instead of shmem_double_sum_to_all()).

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