High School

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We are executing the following commands:

```sh
> gcc -O2 mvmult_papi.c -o mvmult_papi -lcblas -lpapi
```

and later:

```sh
> ./mvmult_papi 20000
```

Size 20000

Answer :

Final answer:

A C program using CBLAS and PAPI libraries is compiled and executed to perform and monitor matrix-vector multiplication with optimizations for a 20000 size matrix or vector.

Explanation:

The command gcc -O2 mvmult_papi.c -o mvmult_papi -lcblas -lpapi is used to compile a C program that most likely performs matrix-vector multiplication, with the use of CBLAS library for linear algebra routines and PAPI for monitoring performance. The -O2 option enables optimizations during the compilation process for better performance.

Upon successful compilation, the resultant executable mvmult_papi is run with the argument 20000, which indicates the size of the matrix or vector, depending on the implementation. This execution measure how efficiently the program performs the multiplication for large datasets.

Learn more about Compiling C Programs here:

https://brainly.com/question/33437172

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