public static void ParallelUnsafeMatrixDemo()
{
Console.WriteLine("-------PARALLEL MATRIX MULTIPLICATION DEMO-------");
ParallelMatrixMultiplicator multiplicator = new ParallelMatrixMultiplicator();
UnsafeMatrix <long> A = Utils.RandomMatrix(500, 750);
UnsafeMatrix <long> B = Utils.RandomMatrix(750, 500);
Console.WriteLine("Multiplying two matrices {0}x{1} and {2}x{3}", A.Rows, A.Columns, B.Rows, B.Columns);
Stopwatch stopWatch = new Stopwatch();
Console.WriteLine("Starting parallel...");
stopWatch.Start();
UnsafeMatrix <long> parallelResult = multiplicator.Multiply(A, B, 250);
stopWatch.Stop();
Console.WriteLine($"Parallel: {stopWatch.Elapsed}");
stopWatch.Restart();
Console.WriteLine("Starting serial...");
stopWatch.Start();
UnsafeMatrix <long> serialResult = A * B;
stopWatch.Stop();
Console.WriteLine($"Serial: {stopWatch.Elapsed}");
Console.WriteLine($"Verify results are equal: {parallelResult == serialResult}");
}
public void TestMultiplyShouldFailNotEvenlyPartitioned()
{
// Arrange
UnsafeMatrix <long> A = Utils.RandomMatrix(50, 50);
UnsafeMatrix <long> B = Utils.RandomMatrix(50, 50);
// Act & Assert
Assert.ThrowsException <IndexOutOfRangeException>(() =>
new ParallelMatrixMultiplicator().Multiply <long>(A, B, 15));
}
public void TestMultiplyNonSquare()
{
// Arrange
UnsafeMatrix <long> A = Utils.RandomMatrix(50, 75);
UnsafeMatrix <long> B = Utils.RandomMatrix(75, 50);
// Act
UnsafeMatrix <long> actual = new ParallelMatrixMultiplicator()
.Multiply <long>(A, B, 25);
// Assert
Assert.AreEqual(actual, A * B);
}
