Paralel Blok Faktorisasi Qr Dalam Sistem Memori Tersebar Multikomputer Berbasis Mpi-linux

This paper will present the implementation of parallel block factorization QR with Compact WY form. The parallel program has written in the SPMD (Single Program Multiple Data) style and use MPI (Message Passing Interface) library for communication. The program was successfully run in distributed memory system, with four computers. The Speedup was increase significantly long with increasing the number of processor and increasing the size of matrix: 1.47 for two processors, 1.84 for three processors and 2.13 for four processors