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-rw-r--r--tools/testing/selftests/resctrl/resctrl_tests.c207
1 files changed, 207 insertions, 0 deletions
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
new file mode 100644
index 000000000..b33d1d6dd
--- /dev/null
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Resctrl tests
+ *
+ * Copyright (C) 2018 Intel Corporation
+ *
+ * Authors:
+ * Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
+ * Fenghua Yu <fenghua.yu@intel.com>
+ */
+#include "resctrl.h"
+
+#define BENCHMARK_ARGS 64
+#define BENCHMARK_ARG_SIZE 64
+
+bool is_amd;
+
+void detect_amd(void)
+{
+ FILE *inf = fopen("/proc/cpuinfo", "r");
+ char *res;
+
+ if (!inf)
+ return;
+
+ res = fgrep(inf, "vendor_id");
+
+ if (res) {
+ char *s = strchr(res, ':');
+
+ is_amd = s && !strcmp(s, ": AuthenticAMD\n");
+ free(res);
+ }
+ fclose(inf);
+}
+
+static void cmd_help(void)
+{
+ printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n");
+ printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM");
+ printf("\t default benchmark is builtin fill_buf\n");
+ printf("\t-t test list: run tests specified in the test list, ");
+ printf("e.g. -t mbm,mba,cqm,cat\n");
+ 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");
+}
+
+void tests_cleanup(void)
+{
+ mbm_test_cleanup();
+ mba_test_cleanup();
+ cqm_test_cleanup();
+ cat_test_cleanup();
+}
+
+int main(int argc, char **argv)
+{
+ bool has_ben = false, mbm_test = true, mba_test = true, cqm_test = true;
+ int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 5;
+ 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;
+ bool cat_test = true;
+
+ for (i = 0; i < argc; i++) {
+ if (strcmp(argv[i], "-b") == 0) {
+ ben_ind = i + 1;
+ ben_count = argc - ben_ind;
+ argc_new = ben_ind - 1;
+ has_ben = true;
+ break;
+ }
+ }
+
+ while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) {
+ char *token;
+
+ switch (c) {
+ case 't':
+ token = strtok(optarg, ",");
+
+ mbm_test = false;
+ mba_test = false;
+ cqm_test = false;
+ cat_test = false;
+ while (token) {
+ if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) {
+ mbm_test = true;
+ } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) {
+ mba_test = true;
+ } else if (!strncmp(token, CQM_STR, sizeof(CQM_STR))) {
+ cqm_test = true;
+ } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) {
+ cat_test = true;
+ } else {
+ printf("invalid argument\n");
+
+ return -1;
+ }
+ token = strtok(NULL, ",");
+ }
+ break;
+ case 'p':
+ cpu_no = atoi(optarg);
+ break;
+ case 'n':
+ no_of_bits = atoi(optarg);
+ break;
+ case 'h':
+ cmd_help();
+
+ return 0;
+ default:
+ printf("invalid argument\n");
+
+ return -1;
+ }
+ }
+
+ printf("TAP version 13\n");
+
+ /*
+ * Typically we need root privileges, because:
+ * 1. We write to resctrl FS
+ * 2. We execute perf commands
+ */
+ if (geteuid() != 0)
+ printf("# WARNING: not running as root, tests may fail.\n");
+
+ /* Detect AMD vendor */
+ detect_amd();
+
+ if (has_ben) {
+ if (argc - ben_ind >= BENCHMARK_ARGS)
+ ksft_exit_fail_msg("Too long benchmark command.\n");
+
+ /* Extract benchmark command from command line. */
+ for (i = ben_ind; i < argc; i++) {
+ benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
+ if (strlen(argv[i]) >= BENCHMARK_ARG_SIZE)
+ ksft_exit_fail_msg("Too long benchmark command argument.\n");
+ sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
+ }
+ benchmark_cmd[ben_count] = NULL;
+ } else {
+ /* If no benchmark is given by "-b" argument, use fill_buf. */
+ for (i = 0; i < 6; i++)
+ benchmark_cmd[i] = benchmark_cmd_area[i];
+
+ strcpy(benchmark_cmd[0], "fill_buf");
+ sprintf(benchmark_cmd[1], "%d", span);
+ strcpy(benchmark_cmd[2], "1");
+ strcpy(benchmark_cmd[3], "1");
+ strcpy(benchmark_cmd[4], "0");
+ strcpy(benchmark_cmd[5], "");
+ benchmark_cmd[6] = NULL;
+ }
+
+ sprintf(bw_report, "reads");
+ sprintf(bm_type, "fill_buf");
+
+ check_resctrlfs_support();
+ filter_dmesg();
+
+ if (!is_amd && mbm_test) {
+ printf("# Starting MBM BW change ...\n");
+ if (!has_ben)
+ sprintf(benchmark_cmd[5], "%s", MBA_STR);
+ res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
+ printf("%sok MBM: bw change\n", res ? "not " : "");
+ mbm_test_cleanup();
+ tests_run++;
+ }
+
+ if (!is_amd && mba_test) {
+ printf("# Starting MBA Schemata change ...\n");
+ if (!has_ben)
+ sprintf(benchmark_cmd[1], "%d", span);
+ res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
+ printf("%sok MBA: schemata change\n", res ? "not " : "");
+ mba_test_cleanup();
+ tests_run++;
+ }
+
+ if (cqm_test) {
+ printf("# Starting CQM test ...\n");
+ if (!has_ben)
+ sprintf(benchmark_cmd[5], "%s", CQM_STR);
+ res = cqm_resctrl_val(cpu_no, no_of_bits, benchmark_cmd);
+ printf("%sok CQM: test\n", res ? "not " : "");
+ cqm_test_cleanup();
+ tests_run++;
+ }
+
+ if (cat_test) {
+ printf("# Starting CAT test ...\n");
+ res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
+ printf("%sok CAT: test\n", res ? "not " : "");
+ tests_run++;
+ cat_test_cleanup();
+ }
+
+ printf("1..%d\n", tests_run);
+
+ return 0;
+}