OpenMP on the FDSM software distributed shared memory

This paper describes an OpenMP ready distributed shared memory system called FDSM. FDSM analyzes the access pattern to the shared memory at the ¯rst itera-tion of a loop and obtain the communication set. By using this information, it reduces the overhead of the coherence maintenance. OpenMP on FDSM is evaluated by using the benchmark application CG in the NAS parallel benchmark and compared with another DSM system. The benchmark result shows FDSM runs 40 % to 80 % faster than another DSM system and 70 % to 90 % slower than the same benchmark written in MPI.