Multithreading in java

Multithreading Experiment.

Requests you to use multiple thread to perform matrix production, C = A * B,

Where A is a 10 x 200 matrix, B is a 200 X 8 matrix, and the result C is 10 x 8 matrix. Implement the followings:

(1) Initialize A with value from 1 to 2000, in row-major order (that is, one row by one row).

(2) Initialize B with value from 1600 to 1, in row-major order (that is, one row by one row).

(3) Create 10 threads: T1, T2, …, T10. T1 performs the product for row1 and A and matrix B, and the result will be save to row1 of matrix C, T2 performs the product for row2 and A and matrix B, and the result will be save to row2 of matrix C, …, T10 performs the product for row10 and A and matrix B, and the result will be save to row10 of matrix C.

(4) T1, T2, …, T10 run in parallel. For Java multithreading, please refer to Appendix A.

(5) Matrix C is a shared variable between T1, T2, …, T10. When they save result to matrix C, they need to compete for mutex. (mutex is a semaphore). For semaphore sample code, please refer to Appendix B.

(6) After you finish above (1) to (5), modify it perform D = E * F, where E is 10 x 8000, F is 8000 x 8 matrices, and D is a 10 x 8 matrix. Initialize E and F with random integer between 0 and 100. And measure the execution time for calculating D = E * F.

(7) Generate your report include source code and execution result (screen shots).

Compétences : Java

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