diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2021-03-17 02:22:49 +0000 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2021-04-02 13:58:08 -0600 |
| commit | 09a67934625a5941737c566b48e4e574ac4d1d99 (patch) | |
| tree | cfe17fde04e11787f8331c86ba32d4633a29cade /tools/testing/selftests/resctrl | |
| parent | 06bd03a57f8c2e3a8698a7ce7dead4ef18e00902 (diff) | |
selftests/resctrl: Don't hard code value of "no_of_bits" variable
Cache related tests (like CAT and CMT) depend on a variable called
no_of_bits to run. no_of_bits defines the number of contiguous bits
that should be set in the CBM mask and a user can pass a value for
no_of_bits using -n command line argument. If a user hasn't passed any
value, it defaults to 5 (randomly chosen value).
Hard coding no_of_bits to 5 will make the cache tests fail to run on
systems that support maximum cbm mask that is less than or equal to 5 bits.
Hence, don't hard code no_of_bits value.
If a user passes a value for "no_of_bits" using -n option, use it.
Otherwise, no_of_bits is equal to half of the maximum number of bits in
the cbm mask.
Please note that CMT test is still hard coded to 5 bits. It will change in
subsequent patches that change CMT test.
Tested-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests/resctrl')
| -rw-r--r-- | tools/testing/selftests/resctrl/cat_test.c | 5 | ||||
| -rw-r--r-- | tools/testing/selftests/resctrl/resctrl_tests.c | 8 |
2 files changed, 10 insertions, 3 deletions
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c index 090d3afc7a78..04d706b4f10e 100644 --- a/tools/testing/selftests/resctrl/cat_test.c +++ b/tools/testing/selftests/resctrl/cat_test.c @@ -130,7 +130,10 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type) /* Get max number of bits from default-cabm mask */ count_of_bits = count_bits(long_mask); - if (n < 1 || n > count_of_bits - 1) { + if (!n) + n = count_of_bits / 2; + + if (n > count_of_bits - 1) { ksft_print_msg("Invalid input value for no_of_bits n!\n"); ksft_print_msg("Please enter value in range 1 to %d\n", count_of_bits - 1); diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c index 355bd28b996a..2ace464b96d1 100644 --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -57,7 +57,7 @@ void tests_cleanup(void) int main(int argc, char **argv) { bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true; - int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 5; + int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0; char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64]; char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE]; int ben_ind, ben_count, tests = 0; @@ -110,6 +110,10 @@ int main(int argc, char **argv) break; case 'n': no_of_bits = atoi(optarg); + if (no_of_bits <= 0) { + printf("Bail out! invalid argument for no_of_bits\n"); + return -1; + } break; case 'h': cmd_help(); @@ -188,7 +192,7 @@ int main(int argc, char **argv) ksft_print_msg("Starting CMT test ...\n"); if (!has_ben) sprintf(benchmark_cmd[5], "%s", CMT_STR); - res = cmt_resctrl_val(cpu_no, no_of_bits, benchmark_cmd); + res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd); ksft_test_result(!res, "CMT: test\n"); cmt_test_cleanup(); } |