From: Fenghua Yu fenghua.yu@intel.com
Presently, while calculating MBM results, the divisor is hard coded as 4. It's hard coded to 4 because "NUM_OF_RUNS" is defined as 5 and the test does not count first result and hence 4. So, instead of hard coding the value to 4, change it to NUM_OF_RUNS - 1.
Signed-off-by: Fenghua Yu fenghua.yu@intel.com --- tools/testing/selftests/resctrl/mbm_test.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c index 8392e5c55ed0..4f85cbbfd037 100644 --- a/tools/testing/selftests/resctrl/mbm_test.c +++ b/tools/testing/selftests/resctrl/mbm_test.c @@ -31,8 +31,8 @@ show_bw_info(unsigned long *bw_imc, unsigned long *bw_resc, int span) sum_bw_resc += bw_resc[runs]; }
- avg_bw_imc = sum_bw_imc / 4; - avg_bw_resc = sum_bw_resc / 4; + avg_bw_imc = sum_bw_imc / (NUM_OF_RUNS - 1); + avg_bw_resc = sum_bw_resc / (NUM_OF_RUNS - 1); avg_diff = (float)labs(avg_bw_resc - avg_bw_imc) / avg_bw_imc; avg_diff_per = (int)(avg_diff * 100);