1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
// 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) {
/* Extract benchmark command from command line. */
for (i = ben_ind; i < argc; i++) {
benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
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();
}
|
