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
16bool is_amd;
17
18void 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
37static 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
49void tests_cleanup(void)
50{
51	mbm_test_cleanup();
52	mba_test_cleanup();
53	cqm_test_cleanup();
54	cat_test_cleanup();
55}
56
57int 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