1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Resctrl tests
4 *
5 * Copyright (C) 2018 Intel Corporation
6 *
7 * Authors:
8 * Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
9 * Fenghua Yu <fenghua.yu@intel.com>
10 */
11 #include "resctrl.h"
12
13 #define BENCHMARK_ARGS 64
14 #define BENCHMARK_ARG_SIZE 64
15
16 bool is_amd;
17
detect_amd(void)18 void detect_amd(void)
19 {
20 FILE *inf = fopen("/proc/cpuinfo", "r");
21 char *res;
22
23 if (!inf)
24 return;
25
26 res = fgrep(inf, "vendor_id");
27
28 if (res) {
29 char *s = strchr(res, ':');
30
31 is_amd = s && !strcmp(s, ": AuthenticAMD\n");
32 free(res);
33 }
34 fclose(inf);
35 }
36
cmd_help(void)37 static void cmd_help(void)
38 {
39 printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n");
40 printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM");
41 printf("\t default benchmark is builtin fill_buf\n");
42 printf("\t-t test list: run tests specified in the test list, ");
43 printf("e.g. -t mbm,mba,cqm,cat\n");
44 printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n");
45 printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n");
46 printf("\t-h: help\n");
47 }
48
tests_cleanup(void)49 void tests_cleanup(void)
50 {
51 mbm_test_cleanup();
52 mba_test_cleanup();
53 cqm_test_cleanup();
54 cat_test_cleanup();
55 }
56
main(int argc,char ** argv)57 int main(int argc, char **argv)
58 {
59 bool has_ben = false, mbm_test = true, mba_test = true, cqm_test = true;
60 int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 5;
61 char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
62 char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
63 int ben_ind, ben_count;
64 bool cat_test = true;
65
66 for (i = 0; i < argc; i++) {
67 if (strcmp(argv[i], "-b") == 0) {
68 ben_ind = i + 1;
69 ben_count = argc - ben_ind;
70 argc_new = ben_ind - 1;
71 has_ben = true;
72 break;
73 }
74 }
75
76 while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) {
77 char *token;
78
79 switch (c) {
80 case 't':
81 token = strtok(optarg, ",");
82
83 mbm_test = false;
84 mba_test = false;
85 cqm_test = false;
86 cat_test = false;
87 while (token) {
88 if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) {
89 mbm_test = true;
90 } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) {
91 mba_test = true;
92 } else if (!strncmp(token, CQM_STR, sizeof(CQM_STR))) {
93 cqm_test = true;
94 } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) {
95 cat_test = true;
96 } else {
97 printf("invalid argument\n");
98
99 return -1;
100 }
101 token = strtok(NULL, ",");
102 }
103 break;
104 case 'p':
105 cpu_no = atoi(optarg);
106 break;
107 case 'n':
108 no_of_bits = atoi(optarg);
109 break;
110 case 'h':
111 cmd_help();
112
113 return 0;
114 default:
115 printf("invalid argument\n");
116
117 return -1;
118 }
119 }
120
121 printf("TAP version 13\n");
122
123 /*
124 * Typically we need root privileges, because:
125 * 1. We write to resctrl FS
126 * 2. We execute perf commands
127 */
128 if (geteuid() != 0)
129 printf("# WARNING: not running as root, tests may fail.\n");
130
131 /* Detect AMD vendor */
132 detect_amd();
133
134 if (has_ben) {
135 if (argc - ben_ind >= BENCHMARK_ARGS)
136 ksft_exit_fail_msg("Too long benchmark command.\n");
137
138 /* Extract benchmark command from command line. */
139 for (i = ben_ind; i < argc; i++) {
140 benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
141 if (strlen(argv[i]) >= BENCHMARK_ARG_SIZE)
142 ksft_exit_fail_msg("Too long benchmark command argument.\n");
143 sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
144 }
145 benchmark_cmd[ben_count] = NULL;
146 } else {
147 /* If no benchmark is given by "-b" argument, use fill_buf. */
148 for (i = 0; i < 6; i++)
149 benchmark_cmd[i] = benchmark_cmd_area[i];
150
151 strcpy(benchmark_cmd[0], "fill_buf");
152 sprintf(benchmark_cmd[1], "%d", span);
153 strcpy(benchmark_cmd[2], "1");
154 strcpy(benchmark_cmd[3], "1");
155 strcpy(benchmark_cmd[4], "0");
156 strcpy(benchmark_cmd[5], "");
157 benchmark_cmd[6] = NULL;
158 }
159
160 sprintf(bw_report, "reads");
161 sprintf(bm_type, "fill_buf");
162
163 check_resctrlfs_support();
164 filter_dmesg();
165
166 if (!is_amd && mbm_test) {
167 printf("# Starting MBM BW change ...\n");
168 if (!has_ben)
169 sprintf(benchmark_cmd[5], "%s", MBA_STR);
170 res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
171 printf("%sok MBM: bw change\n", res ? "not " : "");
172 mbm_test_cleanup();
173 tests_run++;
174 }
175
176 if (!is_amd && mba_test) {
177 printf("# Starting MBA Schemata change ...\n");
178 if (!has_ben)
179 sprintf(benchmark_cmd[1], "%d", span);
180 res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
181 printf("%sok MBA: schemata change\n", res ? "not " : "");
182 mba_test_cleanup();
183 tests_run++;
184 }
185
186 if (cqm_test) {
187 printf("# Starting CQM test ...\n");
188 if (!has_ben)
189 sprintf(benchmark_cmd[5], "%s", CQM_STR);
190 res = cqm_resctrl_val(cpu_no, no_of_bits, benchmark_cmd);
191 printf("%sok CQM: test\n", res ? "not " : "");
192 cqm_test_cleanup();
193 tests_run++;
194 }
195
196 if (cat_test) {
197 printf("# Starting CAT test ...\n");
198 res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
199 printf("%sok CAT: test\n", res ? "not " : "");
200 tests_run++;
201 cat_test_cleanup();
202 }
203
204 printf("1..%d\n", tests_run);
205
206 return 0;
207 }
208