The measurement done in resctrl_val() varies depending on test type. The decision for how to measure is decided based on the string compare to test name which is quite inflexible.
Add ->measure() callback into the struct resctrl_val_param to allow each test to provide necessary code as a function which simplifies what resctrl_val() has to do.
Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Tested-by: Babu Moger babu.moger@amd.com Reviewed-by: Reinette Chatre reinette.chatre@intel.com ---
v2: - spaces -> tabs --- tools/testing/selftests/resctrl/cmt_test.c | 8 ++++++++ tools/testing/selftests/resctrl/mba_test.c | 9 ++++++++- tools/testing/selftests/resctrl/mbm_test.c | 9 ++++++++- tools/testing/selftests/resctrl/resctrl.h | 6 ++++++ tools/testing/selftests/resctrl/resctrl_val.c | 18 +++++------------- 5 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c index a44e6fcd37b7..d8521386cd18 100644 --- a/tools/testing/selftests/resctrl/cmt_test.c +++ b/tools/testing/selftests/resctrl/cmt_test.c @@ -29,6 +29,13 @@ static int cmt_setup(const struct resctrl_test *test, return 0; }
+static int cmt_measure(const struct user_params *uparams, + struct resctrl_val_param *param, pid_t bm_pid) +{ + sleep(1); + return measure_llc_resctrl(param->filename, bm_pid); +} + static int show_results_info(unsigned long sum_llc_val, int no_of_bits, unsigned long cache_span, unsigned long max_diff, unsigned long max_diff_percent, unsigned long num_of_runs, @@ -133,6 +140,7 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param .mask = ~(long_mask << n) & long_mask, .num_of_runs = 0, .setup = cmt_setup, + .measure = cmt_measure, };
span = cache_portion_size(cache_total_size, param.mask, long_mask); diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c index 5d6af9e8afed..de6e29faf214 100644 --- a/tools/testing/selftests/resctrl/mba_test.c +++ b/tools/testing/selftests/resctrl/mba_test.c @@ -51,6 +51,12 @@ static int mba_setup(const struct resctrl_test *test, return 0; }
+static int mba_measure(const struct user_params *uparams, + struct resctrl_val_param *param, pid_t bm_pid) +{ + return measure_mem_bw(uparams, param, bm_pid); +} + static bool show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc) { int allocation, runs; @@ -150,7 +156,8 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param .mongrp = "m1", .filename = RESULT_FILE_NAME, .bw_report = "reads", - .setup = mba_setup + .setup = mba_setup, + .measure = mba_measure, }; int ret;
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c index 96d279b06377..59e26adf60bb 100644 --- a/tools/testing/selftests/resctrl/mbm_test.c +++ b/tools/testing/selftests/resctrl/mbm_test.c @@ -105,6 +105,12 @@ static int mbm_setup(const struct resctrl_test *test, return ret; }
+static int mbm_measure(const struct user_params *uparams, + struct resctrl_val_param *param, pid_t bm_pid) +{ + return measure_mem_bw(uparams, param, bm_pid); +} + static void mbm_test_cleanup(void) { remove(RESULT_FILE_NAME); @@ -117,7 +123,8 @@ static int mbm_run_test(const struct resctrl_test *test, const struct user_param .ctrlgrp = "c1", .filename = RESULT_FILE_NAME, .bw_report = "reads", - .setup = mbm_setup + .setup = mbm_setup, + .measure = mbm_measure, }; int ret;
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index e4b6dc672ecc..5dc3def70669 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -87,6 +87,7 @@ struct resctrl_test { * @filename: Name of file to which the o/p should be written * @bw_report: Bandwidth report type (reads vs writes) * @setup: Call back function to setup test environment + * @measure: Callback that performs the measurement (a single test) */ struct resctrl_val_param { char *resctrl_val; @@ -99,6 +100,9 @@ struct resctrl_val_param { int (*setup)(const struct resctrl_test *test, const struct user_params *uparams, struct resctrl_val_param *param); + int (*measure)(const struct user_params *uparams, + struct resctrl_val_param *param, + pid_t bm_pid); };
struct perf_event_read { @@ -145,6 +149,8 @@ unsigned char *alloc_buffer(size_t buf_size, int memflush); void mem_flush(unsigned char *buf, size_t buf_size); void fill_cache_read(unsigned char *buf, size_t buf_size, bool once); int run_fill_buf(size_t buf_size, int memflush, int op, bool once); +int measure_mem_bw(const struct user_params *uparams, + struct resctrl_val_param *param, pid_t bm_pid); int resctrl_val(const struct resctrl_test *test, const struct user_params *uparams, const char * const *benchmark_cmd, diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c index 9d6982be3b68..22446930a856 100644 --- a/tools/testing/selftests/resctrl/resctrl_val.c +++ b/tools/testing/selftests/resctrl/resctrl_val.c @@ -606,8 +606,8 @@ static void initialize_llc_occu_resctrl(const char *ctrlgrp, const char *mongrp, * available. Compare the two values to validate resctrl value. It takes * 1 sec to measure the data. */ -static int measure_mem_bw(const struct user_params *uparams, - struct resctrl_val_param *param, pid_t bm_pid) +int measure_mem_bw(const struct user_params *uparams, + struct resctrl_val_param *param, pid_t bm_pid) { unsigned long bw_resc, bw_resc_start, bw_resc_end; FILE *mem_bw_fp; @@ -868,17 +868,9 @@ int resctrl_val(const struct resctrl_test *test, if (ret < 0) break;
- if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) || - !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) { - ret = measure_mem_bw(uparams, param, bm_pid); - if (ret) - break; - } else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) { - sleep(1); - ret = measure_llc_resctrl(param->filename, bm_pid); - if (ret) - break; - } + ret = param->measure(uparams, param, bm_pid); + if (ret) + break; }
out: