You want to use these files for your initial testing before your code is reliable and fast.
Matrix A files A_test_1_small.txt A_test_2_small.txt A_test_3_small.txt A_test_4_small.txt A_test_5_small.txt A_test_6_small.txt A_test_7_small.txt A_test_8_small.txt A_test_9_small.txt A_test_10_small.txt Matrix B files B_test_1_small.txt B_test_2_small.txt B_test_3_small.txt B_test_4_small.txt B_test_5_small.txt B_test_6_small.txt B_test_7_small.txt B_test_8_small.txt B_test_9_small.txt B_test_10_small.txt Matrix C files C_test_1_small.txt C_test_2_small.txt C_test_3_small.txt C_test_4_small.txt C_test_5_small.txt C_test_6_small.txt C_test_7_small.txt C_test_8_small.txt C_test_9_small.txt C_test_10_small.txt Matrix A + B files A_addn_B_1_small.txt A_addn_B_2_small.txt A_addn_B_3_small.txt A_addn_B_4_small.txt A_addn_B_5_small.txt A_addn_B_6_small.txt A_addn_B_7_small.txt A_addn_B_8_small.txt A_addn_B_9_small.txt A_addn_B_10_small.txt Matrix A * C files A_mult_C_1_small.txt A_mult_C_2_small.txt A_mult_C_3_small.txt A_mult_C_4_small.txt A_mult_C_5_small.txt A_mult_C_6_small.txt A_mult_C_7_small.txt A_mult_C_8_small.txt A_mult_C_9_small.txt A_mult_C_10_small.txt Matrix const * A files A_mult_n_1_small.txt A_mult_n_2_small.txt A_mult_n_3_small.txt A_mult_n_4_small.txt A_mult_n_5_small.txt A_mult_n_6_small.txt A_mult_n_7_small.txt A_mult_n_8_small.txt A_mult_n_9_small.txt A_mult_n_10_small.txt