基于mpi-2 规范的并行i/o方法，以并行矩阵乘法问题为例，比较了并行i/o和串 行i/o的性能，给出了并行i/o方法的应用实例。-Mpi-2 norms based on the parallel i/o approach to parallel matrix multiplication as an example, compare the parallel i/o and serial i/o performance, given the parallel i/o methods o