277 lines
6.7 KiB
C
277 lines
6.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Resctrl tests
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*
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* Copyright (C) 2018 Intel Corporation
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*
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* Authors:
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* Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
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* Fenghua Yu <fenghua.yu@intel.com>
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*/
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#include "resctrl.h"
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#define BENCHMARK_ARGS 64
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#define BENCHMARK_ARG_SIZE 64
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static int detect_vendor(void)
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{
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FILE *inf = fopen("/proc/cpuinfo", "r");
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int vendor_id = 0;
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char *s = NULL;
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char *res;
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if (!inf)
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return vendor_id;
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res = fgrep(inf, "vendor_id");
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if (res)
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s = strchr(res, ':');
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if (s && !strcmp(s, ": GenuineIntel\n"))
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vendor_id = ARCH_INTEL;
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else if (s && !strcmp(s, ": AuthenticAMD\n"))
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vendor_id = ARCH_AMD;
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fclose(inf);
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free(res);
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return vendor_id;
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}
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int get_vendor(void)
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{
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static int vendor = -1;
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if (vendor == -1)
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vendor = detect_vendor();
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if (vendor == 0)
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ksft_print_msg("Can not get vendor info...\n");
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return vendor;
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}
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static void cmd_help(void)
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{
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printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n");
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printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT\n");
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printf("\t default benchmark is builtin fill_buf\n");
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printf("\t-t test list: run tests specified in the test list, ");
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printf("e.g. -t mbm,mba,cmt,cat\n");
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printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n");
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printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n");
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printf("\t-h: help\n");
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}
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void tests_cleanup(void)
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{
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mbm_test_cleanup();
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mba_test_cleanup();
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cmt_test_cleanup();
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cat_test_cleanup();
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}
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static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
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int cpu_no, char *bw_report)
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{
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int res;
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ksft_print_msg("Starting MBM BW change ...\n");
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if (!validate_resctrl_feature_request(MBM_STR)) {
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ksft_test_result_skip("Hardware does not support MBM or MBM is disabled\n");
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return;
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}
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if (!has_ben)
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sprintf(benchmark_cmd[5], "%s", MBA_STR);
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res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
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ksft_test_result(!res, "MBM: bw change\n");
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if ((get_vendor() == ARCH_INTEL) && res)
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ksft_print_msg("Intel MBM may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
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mbm_test_cleanup();
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}
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static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
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int cpu_no, char *bw_report)
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{
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int res;
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ksft_print_msg("Starting MBA Schemata change ...\n");
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if (!validate_resctrl_feature_request(MBA_STR)) {
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ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n");
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return;
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}
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if (!has_ben)
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sprintf(benchmark_cmd[1], "%d", span);
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res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
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ksft_test_result(!res, "MBA: schemata change\n");
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mba_test_cleanup();
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}
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static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
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{
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int res;
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ksft_print_msg("Starting CMT test ...\n");
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if (!validate_resctrl_feature_request(CMT_STR)) {
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ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n");
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return;
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}
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if (!has_ben)
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sprintf(benchmark_cmd[5], "%s", CMT_STR);
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res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
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ksft_test_result(!res, "CMT: test\n");
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if ((get_vendor() == ARCH_INTEL) && res)
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ksft_print_msg("Intel CMT may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
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cmt_test_cleanup();
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}
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static void run_cat_test(int cpu_no, int no_of_bits)
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{
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int res;
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ksft_print_msg("Starting CAT test ...\n");
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if (!validate_resctrl_feature_request(CAT_STR)) {
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ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n");
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return;
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}
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res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
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ksft_test_result(!res, "CAT: test\n");
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cat_test_cleanup();
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}
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int main(int argc, char **argv)
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{
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bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
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int c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0;
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char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
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char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
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int ben_ind, ben_count, tests = 0;
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bool cat_test = true;
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for (i = 0; i < argc; i++) {
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if (strcmp(argv[i], "-b") == 0) {
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ben_ind = i + 1;
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ben_count = argc - ben_ind;
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argc_new = ben_ind - 1;
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has_ben = true;
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break;
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}
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}
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while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) {
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char *token;
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switch (c) {
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case 't':
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token = strtok(optarg, ",");
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mbm_test = false;
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mba_test = false;
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cmt_test = false;
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cat_test = false;
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while (token) {
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if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) {
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mbm_test = true;
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tests++;
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} else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) {
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mba_test = true;
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tests++;
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} else if (!strncmp(token, CMT_STR, sizeof(CMT_STR))) {
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cmt_test = true;
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tests++;
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} else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) {
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cat_test = true;
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tests++;
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} else {
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printf("invalid argument\n");
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return -1;
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}
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token = strtok(NULL, ",");
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}
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break;
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case 'p':
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cpu_no = atoi(optarg);
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break;
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case 'n':
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no_of_bits = atoi(optarg);
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if (no_of_bits <= 0) {
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printf("Bail out! invalid argument for no_of_bits\n");
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return -1;
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}
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break;
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case 'h':
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cmd_help();
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return 0;
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default:
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printf("invalid argument\n");
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return -1;
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}
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}
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ksft_print_header();
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/*
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* Typically we need root privileges, because:
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* 1. We write to resctrl FS
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* 2. We execute perf commands
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*/
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if (geteuid() != 0)
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return ksft_exit_skip("Not running as root. Skipping...\n");
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if (has_ben) {
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/* Extract benchmark command from command line. */
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for (i = ben_ind; i < argc; i++) {
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benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
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sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
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}
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benchmark_cmd[ben_count] = NULL;
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} else {
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/* If no benchmark is given by "-b" argument, use fill_buf. */
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for (i = 0; i < 6; i++)
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benchmark_cmd[i] = benchmark_cmd_area[i];
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strcpy(benchmark_cmd[0], "fill_buf");
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sprintf(benchmark_cmd[1], "%d", span);
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strcpy(benchmark_cmd[2], "1");
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strcpy(benchmark_cmd[3], "1");
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strcpy(benchmark_cmd[4], "0");
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strcpy(benchmark_cmd[5], "");
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benchmark_cmd[6] = NULL;
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}
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sprintf(bw_report, "reads");
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sprintf(bm_type, "fill_buf");
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if (!check_resctrlfs_support())
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return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n");
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filter_dmesg();
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ksft_set_plan(tests ? : 4);
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if ((get_vendor() == ARCH_INTEL) && mbm_test)
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run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
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if ((get_vendor() == ARCH_INTEL) && mba_test)
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run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
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if (cmt_test)
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run_cmt_test(has_ben, benchmark_cmd, cpu_no);
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if (cat_test)
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run_cat_test(cpu_no, no_of_bits);
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umount_resctrlfs();
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return ksft_exit_pass();
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}
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