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// 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) {
if (argc - ben_ind >= BENCHMARK_ARGS)
ksft_exit_fail_msg("Too long benchmark command.\n");
/* Extract benchmark command from command line. */
for (i = ben_ind; i < argc; i++) {
benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
if (strlen(argv[i]) >= BENCHMARK_ARG_SIZE)
ksft_exit_fail_msg("Too long benchmark command argument.\n");
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();
}
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