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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /tools/testing/selftests/resctrl/resctrl_tests.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/resctrl/resctrl_tests.c')
-rw-r--r--tools/testing/selftests/resctrl/resctrl_tests.c281
1 files changed, 281 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..4418155a8
--- /dev/null
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -0,0 +1,281 @@
+// 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
+
+static int detect_vendor(void)
+{
+ FILE *inf = fopen("/proc/cpuinfo", "r");
+ int vendor_id = 0;
+ char *s = NULL;
+ char *res;
+
+ if (!inf)
+ return vendor_id;
+
+ res = fgrep(inf, "vendor_id");
+
+ if (res)
+ s = strchr(res, ':');
+
+ if (s && !strcmp(s, ": GenuineIntel\n"))
+ vendor_id = ARCH_INTEL;
+ else if (s && !strcmp(s, ": AuthenticAMD\n"))
+ vendor_id = ARCH_AMD;
+
+ fclose(inf);
+ free(res);
+ return vendor_id;
+}
+
+int get_vendor(void)
+{
+ static int vendor = -1;
+
+ if (vendor == -1)
+ vendor = detect_vendor();
+ if (vendor == 0)
+ ksft_print_msg("Can not get vendor info...\n");
+
+ return vendor;
+}
+
+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 CMT\n");
+ 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,cmt,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();
+ cmt_test_cleanup();
+ cat_test_cleanup();
+}
+
+static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
+ int cpu_no, char *bw_report)
+{
+ int res;
+
+ ksft_print_msg("Starting MBM BW change ...\n");
+
+ if (!validate_resctrl_feature_request(MBM_STR)) {
+ 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);
+ ksft_test_result(!res, "MBM: bw change\n");
+ if ((get_vendor() == ARCH_INTEL) && res)
+ ksft_print_msg("Intel MBM may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
+ mbm_test_cleanup();
+}
+
+static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
+ int cpu_no, char *bw_report)
+{
+ int res;
+
+ ksft_print_msg("Starting MBA Schemata change ...\n");
+
+ if (!validate_resctrl_feature_request(MBA_STR)) {
+ 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);
+ ksft_test_result(!res, "MBA: schemata change\n");
+ mba_test_cleanup();
+}
+
+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_STR)) {
+ ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n");
+ return;
+ }
+
+ if (!has_ben)
+ sprintf(benchmark_cmd[5], "%s", CMT_STR);
+ res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
+ ksft_test_result(!res, "CMT: test\n");
+ if ((get_vendor() == ARCH_INTEL) && res)
+ ksft_print_msg("Intel CMT may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
+ cmt_test_cleanup();
+}
+
+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_STR)) {
+ 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();
+}
+
+int main(int argc, char **argv)
+{
+ bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
+ int 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;
+ 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;
+ cmt_test = false;
+ cat_test = false;
+ while (token) {
+ if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) {
+ mbm_test = true;
+ tests++;
+ } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) {
+ mba_test = true;
+ tests++;
+ } else if (!strncmp(token, CMT_STR, sizeof(CMT_STR))) {
+ cmt_test = true;
+ tests++;
+ } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) {
+ cat_test = true;
+ tests++;
+ } 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);
+ if (no_of_bits <= 0) {
+ printf("Bail out! invalid argument for no_of_bits\n");
+ return -1;
+ }
+ break;
+ case 'h':
+ cmd_help();
+
+ return 0;
+ default:
+ printf("invalid argument\n");
+
+ return -1;
+ }
+ }
+
+ ksft_print_header();
+
+ /*
+ * Typically we need root privileges, because:
+ * 1. We write to resctrl FS
+ * 2. We execute perf commands
+ */
+ if (geteuid() != 0)
+ return ksft_exit_skip("Not running as root. Skipping...\n");
+
+ 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");
+
+ if (!check_resctrlfs_support())
+ return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n");
+
+ filter_dmesg();
+
+ ksft_set_plan(tests ? : 4);
+
+ if ((get_vendor() == ARCH_INTEL) && mbm_test)
+ run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
+
+ if ((get_vendor() == ARCH_INTEL) && mba_test)
+ run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
+
+ if (cmt_test)
+ run_cmt_test(has_ben, benchmark_cmd, cpu_no);
+
+ if (cat_test)
+ run_cat_test(cpu_no, no_of_bits);
+
+ umount_resctrlfs();
+
+ return ksft_exit_pass();
+}