Program to compare the performances of matrix multiplications (N by N) in three different ways:
- Triple do-loop (Traditional Parallel processing).
- matmul(a,b) function.
- dgemm routine (INTEL MKL).
Testing with Intel® Xeon® Processor X5670. File I/O Available.
- Intel Fortran Compiler - Builds high-performance applications with Intel processors.
$ ifort test.f90 -fopenmp -mkl -g -traceback -O3 -xSSE3| Dimensions | Do-Loop | matmul | DGEMM |
|---|---|---|---|
| 50 | 0.0023 | 0.0007 | 0.2342 |
| 100 | 0.0026 | 0.0023 | 0.0159 |
| 200 | 0.0059 | 0.0141 | 0.057 |
| 300 | 0.007 | 0.0525 | 0.0231 |
| 400 | 0.0145 | 0.1162 | 0.0246 |
| 500 | 0.037 | 0.2374 | 0.0446 |
| 600 | 0.0991 | 0.3719 | 0.0691 |
| 700 | 0.1488 | 0.6128 | 0.0624 |
| 800 | 0.1886 | 0.9044 | 0.1106 |
| 900 | 0.2676 | 1.2445 | 0.2634 |
| 1000 | 0.3495 | 1.5594 | 0.0742 |
| 2000 | 3.056 | 2.4477 | 0.4545 |
| 3000 | 9.1958 | 5.6129 | 1.4441 |
| 4000 | 24.5081 | 12.2439 | 4.3943 |
| 5000 | 68.2233 | 23.6146 | 9.4369 |
| 6000 | 119.7835 | 38.4411 | 15.9048 |
| 7000 | 188.7068 | 59.4651 | 25.1005 |
| 8000 | 282.5089 | 95.3954 | 37.9633 |
| 9000 | 401.2542 | 124.3488 | 57.2738 |
| 10000 | 556.9635 | 172.0648 | 79.8223 |
| 11000 | 738.395 | 246.489 | 98.5934 |
| 12000 | 955.8021 | 294.2676 | 122.6581 |
| 13000 | 1219.913 | 374.0526 | 156.4873 |
| 14000 | 1505.828 | 469.4558 | 201.7539 |
| 15000 | 1875.0114 | 589.8364 | 299.1275 |
MIT