if (s && !strcmp(s, ": GenuineIntel\n"))
vendor_id = ARCH_INTEL; elseif (s && !strcmp(s, ": AuthenticAMD\n"))
vendor_id = ARCH_AMD;
fclose(inf);
free(res); return vendor_id;
}
int get_vendor(void)
{ staticint vendor = -1;
if (vendor == -1)
vendor = detect_vendor(); if (vendor == 0)
ksft_print_msg("Can not get vendor info...\n");
return vendor;
}
staticvoid cmd_help(void)
{ int i;
printf("usage: resctrl_tests [-h] [-t test list] [-n no_of_bits] [-b benchmark_cmd [option]...]\n");
printf("\t-b benchmark_cmd [option]...: run specified benchmark for MBM, MBA and CMT\n");
printf("\t default benchmark is builtin fill_buf\n");
printf("\t-t test list: run tests/groups specified by the list, ");
printf("e.g. -t mbm,mba,cmt,cat\n");
printf("\t\tSupported tests (group):\n"); for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++) { if (resctrl_tests[i]->group)
printf("\t\t\t%s (%s)\n", resctrl_tests[i]->name, resctrl_tests[i]->group); else
printf("\t\t\t%s\n", resctrl_tests[i]->name);
}
printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n");
printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n");
printf("\t-h: help\n");
}
staticint test_prepare(conststruct resctrl_test *test)
{ int res;
res = signal_handler_register(test); if (res) {
ksft_print_msg("Failed to register signal handler\n"); return res;
}
res = mount_resctrlfs(); if (res) {
signal_handler_unregister();
ksft_print_msg("Failed to mount resctrl FS\n"); return res;
} return 0;
}
if (!test_vendor_specific_check(test)) {
ksft_test_result_skip("Hardware does not support %s\n", test->name); return;
}
snc_mode = snc_nodes_per_l3_cache();
ksft_print_msg("Starting %s test ...\n", test->name);
if (snc_mode == 1 && snc_unreliable && get_vendor() == ARCH_INTEL) {
ksft_test_result_skip("SNC detection unreliable due to offline CPUs. Test results may not be accurate if SNC enabled.\n"); return;
}
if (test_prepare(test)) {
ksft_exit_fail_msg("Abnormal failure when preparing for the test\n"); return;
}
if (!test->feature_check(test)) {
ksft_test_result_skip("Hardware does not support %s or %s is disabled\n",
test->name, test->name); goto cleanup;
}
ret = test->run_test(test, uparams);
ksft_test_result(!ret, "%s: test\n", test->name);
cleanup:
test_cleanup(test);
}
/* * Allocate and initialize a struct fill_buf_param with user provided * (via "-b fill_buf <fill_buf parameters>") parameters. * * Use defaults (that may not be appropriate for all tests) for any * fill_buf parameters omitted by the user. * * Historically it may have been possible for user space to provide * additional parameters, "operation" ("read" vs "write") in * benchmark_cmd[3] and "once" (run "once" or until terminated) in * benchmark_cmd[4]. Changing these parameters have never been * supported with the default of "read" operation and running until * terminated built into the tests. Any unsupported values for * (original) "fill_buf" parameters are treated as failure. * * Return: On failure, forcibly exits the test on any parsing failure, * returns NULL if no parsing needed (user did not actually provide * "-b fill_buf"). * On success, returns pointer to newly allocated and fully * initialized struct fill_buf_param that caller must free.
*/ staticstruct fill_buf_param *alloc_fill_buf_param(struct user_params *uparams)
{ struct fill_buf_param *fill_param = NULL; char *endptr = NULL;
if (!uparams->benchmark_cmd[0] || strcmp(uparams->benchmark_cmd[0], "fill_buf")) return NULL;
fill_param = malloc(sizeof(*fill_param)); if (!fill_param)
ksft_exit_skip("Unable to allocate memory for fill_buf parameters.\n");
if (uparams->benchmark_cmd[3] && *uparams->benchmark_cmd[3] != '\0') { if (strcmp(uparams->benchmark_cmd[3], "0")) {
free(fill_param);
ksft_exit_skip("Only read operations supported.\n");
}
}
if (uparams->benchmark_cmd[4] && *uparams->benchmark_cmd[4] != '\0') { if (strcmp(uparams->benchmark_cmd[4], "false")) {
free(fill_param);
ksft_exit_skip("fill_buf is required to run until termination.\n");
}
}
switch (c) { case'b': /* * First move optind back to the (first) optarg and * then build the benchmark command using the * remaining arguments.
*/
optind--; if (argc - optind >= BENCHMARK_ARGS)
ksft_exit_fail_msg("Too long benchmark command");
/* Extract benchmark command from command line. */ for (i = 0; i < argc - optind; i++)
uparams.benchmark_cmd[i] = argv[i + optind];
uparams.benchmark_cmd[i] = NULL;
if (!test_param_seen) { for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++)
resctrl_tests[i]->disabled = true;
tests = 0;
test_param_seen = true;
} while (token) { bool found = false;
for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++) { if (!strcasecmp(token, resctrl_tests[i]->name) ||
(resctrl_tests[i]->group &&
!strcasecmp(token, resctrl_tests[i]->group))) { if (resctrl_tests[i]->disabled)
tests++;
resctrl_tests[i]->disabled = false;
found = true;
}
}
if (!found) {
printf("invalid test: %s\n", token);
fill_param = alloc_fill_buf_param(&uparams); if (fill_param)
uparams.fill_buf = fill_param;
ksft_print_header();
/* * Typically we need root privileges, because: * 1. We write to resctrl FS * 2. We execute perf commands
*/ if (geteuid() != 0)
ksft_exit_skip("Not running as root. Skipping...\n");
if (!check_resctrlfs_support())
ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n");
if (umount_resctrlfs())
ksft_exit_skip("resctrl FS unmount failed.\n");
filter_dmesg();
ksft_set_plan(tests);
for (i = 0; i < ARRAY_SIZE(resctrl_tests); i++)
run_single_test(resctrl_tests[i], &uparams);
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