Simple CUBLAS Matrix Multiplication Example?

Question

I'm looking for a very bare bones matrix multiplication example for CUBLAS that can multiply M times N and place the results in P for the following code, using high-performance GPU operations:

float M[500][500], N[500][500], P[500][500];
for(int i = 0; i < Width; i++){
    for(int j = 0; j < Width; j++)
    {
        M[i][j] = 500;
        N[i][j] = 500;
        P[i][j] = 0;
    }
}

So far, most code I'm finding to do any kind of matrix multiplication using CUBLAS is (seemingly?) overly complicated.

I am attempting to design a basic lab where students can compare the performance of matrix multiplication on the GPU vs matrix multiplication on the CPU, presumably with increased performance on the GPU.

Answer 1

The SDK contains matrixMul which illustrates the use of CUBLAS. For a simpler example see the CUBLAS manual section 1.3.

The matrixMul sample also shows a custom kernel, this won't perform as well as CUBLAS of course.