On 5/7/24 6:21 PM, Reinette Chatre wrote:
Hi John,
...
The following (what was in v1) looks good to me. What am I missing?
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index a81f91222a89..05a241519ae8 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -40,11 +40,11 @@ static int show_results_info(unsigned long sum_llc_val, int no_of_bits,
int ret;
avg_llc_val = sum_llc_val / num_of_runs;
- avg_diff = (long)abs(cache_span - avg_llc_val);
+ avg_diff = (long)(cache_span - avg_llc_val);
This deletes the abs() call, because I incorrectly let clang's warning
lead me to believe that the abs() call was a no-op. But both you and Ilpo
pointed out that the math breaks if you do that.
diff_percent = ((float)cache_span - avg_llc_val) / cache_span * 100;
ret = platform && abs((int)diff_percent) > max_diff_percent &&
- abs(avg_diff) > max_diff;
+ labs(avg_diff) > max_diff;
This hunk is OK.
ksft_print_msg("%s Check cache miss rate within %lu%%\n",
ret ? "Fail:" : "Pass:", max_diff_percent);
Reinette
thanks,
--
John Hubbard
NVIDIA
