High School

What is the purpose of executing the following commands?

1. `gcc -O2 mvmult_papi.c -o mvmult_papi -lcblas -lpapi`

2. `./mvmult_papi 20000`

(Note: The first command compiles the `mvmult_papi.c` file with optimization level 2, linking it with the CBLAS and PAPI libraries, and outputs an executable named `mvmult_papi`. The second command runs the compiled program with an input size of 20000.)

Answer :

Final answer:

The purpose of executing the commands is to compile and run a program that performs matrix-vector multiplication using the PAPI and cBLAS libraries.

Explanation:

The purpose of executing the commands gcc -O2 mvmult_papi.c -o mvmult_papi -lcblas -lpapi and ./mvmult_papi 20000 Size 20000 is to compile and run a program called mvmult_papi that performs matrix-vector multiplication using the PAPI and cBLAS libraries.

The gcc -O2 mvmult_papi.c -o mvmult_papi -lcblas -lpapi command compiles the source code file mvmult_papi.c with optimization level 2 and links it with the libpapi and libcblas libraries to generate an executable named mvmult_papi.

The ./mvmult_papi 20000 Size 20000 command executes the mvmult_papi program with the arguments 20000 and Size 20000, where the first argument specifies the matrix size and the second argument passes further information to the program.

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