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problem 1) a) prepare the MPI program for multiplying two n x n matrices, A and B, with each processor producing a row-band of matrix C.  P0 will send row-bands of A and all of B to slaves.

b) Folder:    MPI multiplication program - column of B rotated in a ring topology

Instructions:    B's column bands are distributed among processors, and rotated in a ring topology. Timing plots varying p = 1, 2, ..., 8 and n = 50, 100, 200, 500, etc.

c) Folder:    Pthread matrix multiplication and reduction programs

(a) Re-implement your multiplication program with each process/thread computing a band of matrix C.  No synchronization is needed here, as all three matrices can be allocated in the shared memory (i.e., in the global scope).

(b) Use a ring pattern to perform reduction over matrix A.  For this, suppose the above processor to row-band allocation, and find row sums of matrix A in parallel with output going into the first column of A. Then, have P0 find the column sum of the first column.  You will need a barrier.

Programming Language, Programming

  • Category:- Programming Language
  • Reference No.:- M95927

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