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| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2023-10-02 12:48:13 +0300 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2023-10-13 14:54:38 -0600 |
| commit | ef43c30858754d99373a63dff33280a9969b49bc (patch) | |
| tree | 31b1d44b632660a16a16334ef5ed5b6b3bbdfc0c /tools/testing/selftests/resctrl/mbm_test.c | |
| parent | 06035f019422ba17e85c11e70d6d8bdbe9fa1afd (diff) | |
| download | linux-stable-ef43c30858754d99373a63dff33280a9969b49bc.tar.gz linux-stable-ef43c30858754d99373a63dff33280a9969b49bc.tar.bz2 linux-stable-ef43c30858754d99373a63dff33280a9969b49bc.zip | |
selftests/resctrl: Reduce failures due to outliers in MBA/MBM tests
The initial value of 5% chosen for the maximum allowed percentage
difference between resctrl mbm value and IMC mbm value in
commit 06bd03a57f8c ("selftests/resctrl: Fix MBA/MBM results reporting
format") was "randomly chosen value" (as admitted by the changelog).
When running tests in our lab across a large number platforms, 5%
difference upper bound for success seems a bit on the low side for the
MBA and MBM tests. Some platforms produce outliers that are slightly
above that, typically 6-7%, which leads MBA/MBM test frequently
failing.
Replace the "randomly chosen value" with a success bound that is based
on those measurements across large number of platforms by relaxing the
MBA/MBM success bound to 8%. The relaxed bound removes the failures due
the frequent outliers.
Fixed commit description style error during merge:
Shuah Khan <skhan@linuxfoundation.org>
Fixes: 06bd03a57f8c ("selftests/resctrl: Fix MBA/MBM results reporting format")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests/resctrl/mbm_test.c')
| -rw-r--r-- | tools/testing/selftests/resctrl/mbm_test.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c index 1ae131a2e246..d3c0d30c676a 100644 --- a/tools/testing/selftests/resctrl/mbm_test.c +++ b/tools/testing/selftests/resctrl/mbm_test.c @@ -11,7 +11,7 @@ #include "resctrl.h" #define RESULT_FILE_NAME "result_mbm" -#define MAX_DIFF_PERCENT 5 +#define MAX_DIFF_PERCENT 8 #define NUM_OF_RUNS 5 static int |