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259 lines
6.0 KiB
259 lines
6.0 KiB
// 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 <[email protected]>, |
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* Fenghua Yu <[email protected]> |
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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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bool is_amd; |
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void detect_amd(void) |
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{ |
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FILE *inf = fopen("/proc/cpuinfo", "r"); |
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char *res; |
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if (!inf) |
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return; |
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res = fgrep(inf, "vendor_id"); |
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if (res) { |
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char *s = strchr(res, ':'); |
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is_amd = s && !strcmp(s, ": AuthenticAMD\n"); |
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free(res); |
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} |
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fclose(inf); |
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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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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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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_fail_msg("Not running as root, abort testing.\n"); |
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/* Detect AMD vendor */ |
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detect_amd(); |
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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_fail_msg("resctrl FS does not exist\n"); |
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filter_dmesg(); |
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ksft_set_plan(tests ? : 4); |
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if (!is_amd && mbm_test) |
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run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report); |
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if (!is_amd && 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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