There could be two reasons why a resctrl feature might not be enabled on the platform 1. H/W might not support the feature 2. Even if the H/W supports it, the user might have disabled the feature through kernel command line arguments
Hence, any resctrl unit test (like cmt, cat, mbm and mba) before starting the test will first check if the feature is enabled on the platform or not. If the feature isn't enabled, then the test returns with an error status. For example, if MBA isn't supported on a platform and if the user tries to run MBA, the output will look like this
ok mounting resctrl to "/sys/fs/resctrl" not ok MBA: schemata change
But, not supporting a feature isn't a test failure. So, instead of treating it as an error, use the SKIP directive of the TAP protocol. With the change, the output will look as below
ok MBA # SKIP Hardware does not support MBA or MBA is disabled
Suggested-by: Reinette Chatre reinette.chatre@intel.com Signed-off-by: Fenghua Yu fenghua.yu@intel.com --- tools/testing/selftests/resctrl/cat_test.c | 3 --- tools/testing/selftests/resctrl/mba_test.c | 3 --- tools/testing/selftests/resctrl/mbm_test.c | 3 --- .../testing/selftests/resctrl/resctrl_tests.c | 23 +++++++++++++++++++ 4 files changed, 23 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c index 58f075aa0423..2e531ef0e7e4 100644 --- a/tools/testing/selftests/resctrl/cat_test.c +++ b/tools/testing/selftests/resctrl/cat_test.c @@ -111,9 +111,6 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type) if (ret) return ret;
- if (!validate_resctrl_feature_request("cat")) - return -1; - /* Get default cbm mask for L3/L2 cache */ ret = get_cbm_mask(cache_type, cbm_mask); if (ret) diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c index fd66a831062c..205f09235b06 100644 --- a/tools/testing/selftests/resctrl/mba_test.c +++ b/tools/testing/selftests/resctrl/mba_test.c @@ -158,9 +158,6 @@ int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
remove(RESULT_FILE_NAME);
- if (!validate_resctrl_feature_request("mba")) - return -1; - ret = resctrl_val(benchmark_cmd, ¶m); if (ret) return ret; diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c index 44a89e0267eb..01f72d4e68a6 100644 --- a/tools/testing/selftests/resctrl/mbm_test.c +++ b/tools/testing/selftests/resctrl/mbm_test.c @@ -131,9 +131,6 @@ int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd)
remove(RESULT_FILE_NAME);
- if (!validate_resctrl_feature_request("mbm")) - return -1; - ret = resctrl_val(benchmark_cmd, ¶m); if (ret) return ret; diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c index f9d00ecbeedb..fa4c5f5075dd 100644 --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -60,6 +60,12 @@ static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span, int res;
ksft_print_msg("Starting MBM BW change ...\n"); + + if (!validate_resctrl_feature_request("mbm")) { + ksft_test_result_skip("Hardware does not support MBM or MBM is disabled\n"); + return; + } + if (!has_ben) sprintf(benchmark_cmd[5], "%s", MBA_STR); res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd); @@ -73,6 +79,12 @@ static void run_mba_test(bool has_ben, char **benchmark_cmd, int span, int res;
ksft_print_msg("Starting MBA Schemata change ...\n"); + + if (!validate_resctrl_feature_request("mba")) { + ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n"); + return; + } + if (!has_ben) sprintf(benchmark_cmd[1], "%d", span); res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd); @@ -85,6 +97,11 @@ static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no) int res;
ksft_print_msg("Starting CMT test ...\n"); + if (!validate_resctrl_feature_request("cmt")) { + ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n"); + return; + } + if (!has_ben) sprintf(benchmark_cmd[5], "%s", "cmt"); res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd); @@ -97,6 +114,12 @@ static void run_cat_test(int cpu_no, int no_of_bits) int res;
ksft_print_msg("Starting CAT test ...\n"); + + if (!validate_resctrl_feature_request("cat")) { + ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n"); + return; + } + res = cat_perf_miss_val(cpu_no, no_of_bits, "L3"); ksft_test_result(!res, "CAT: test\n"); cat_test_cleanup();