1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #define _GNU_SOURCE 3 #ifndef RESCTRL_H 4 #define RESCTRL_H 5 #include <stdio.h> 6 #include <stdarg.h> 7 #include <math.h> 8 #include <errno.h> 9 #include <sched.h> 10 #include <stdlib.h> 11 #include <unistd.h> 12 #include <string.h> 13 #include <signal.h> 14 #include <dirent.h> 15 #include <stdbool.h> 16 #include <sys/stat.h> 17 #include <sys/ioctl.h> 18 #include <sys/mount.h> 19 #include <sys/types.h> 20 #include <sys/wait.h> 21 #include <sys/select.h> 22 #include <sys/time.h> 23 #include <sys/eventfd.h> 24 #include <asm/unistd.h> 25 #include <linux/perf_event.h> 26 #include "../kselftest.h" 27 28 #define MB (1024 * 1024) 29 #define RESCTRL_PATH "/sys/fs/resctrl" 30 #define PHYS_ID_PATH "/sys/devices/system/cpu/cpu" 31 #define INFO_PATH "/sys/fs/resctrl/info" 32 #define L3_PATH "/sys/fs/resctrl/info/L3" 33 #define MB_PATH "/sys/fs/resctrl/info/MB" 34 #define L3_MON_PATH "/sys/fs/resctrl/info/L3_MON" 35 #define L3_MON_FEATURES_PATH "/sys/fs/resctrl/info/L3_MON/mon_features" 36 37 #define ARCH_INTEL 1 38 #define ARCH_AMD 2 39 40 #define END_OF_TESTS 1 41 42 #define PARENT_EXIT(err_msg) \ 43 do { \ 44 perror(err_msg); \ 45 kill(ppid, SIGKILL); \ 46 exit(EXIT_FAILURE); \ 47 } while (0) 48 49 /* 50 * resctrl_val_param: resctrl test parameters 51 * @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc) 52 * @ctrlgrp: Name of the control monitor group (con_mon grp) 53 * @mongrp: Name of the monitor group (mon grp) 54 * @cpu_no: CPU number to which the benchmark would be binded 55 * @span: Memory bytes accessed in each benchmark iteration 56 * @mum_resctrlfs: Should the resctrl FS be remounted? 57 * @filename: Name of file to which the o/p should be written 58 * @bw_report: Bandwidth report type (reads vs writes) 59 * @setup: Call back function to setup test environment 60 */ 61 struct resctrl_val_param { 62 char *resctrl_val; 63 char ctrlgrp[64]; 64 char mongrp[64]; 65 int cpu_no; 66 unsigned long span; 67 bool mum_resctrlfs; 68 char filename[64]; 69 char *bw_report; 70 unsigned long mask; 71 int num_of_runs; 72 int (*setup)(int num, ...); 73 }; 74 75 #define MBM_STR "mbm" 76 #define MBA_STR "mba" 77 #define CMT_STR "cmt" 78 #define CAT_STR "cat" 79 80 extern pid_t bm_pid, ppid; 81 82 extern char llc_occup_path[1024]; 83 84 int get_vendor(void); 85 bool check_resctrlfs_support(void); 86 int filter_dmesg(void); 87 int remount_resctrlfs(bool mum_resctrlfs); 88 int get_resource_id(int cpu_no, int *resource_id); 89 int umount_resctrlfs(void); 90 int validate_bw_report_request(char *bw_report); 91 bool validate_resctrl_feature_request(const char *resctrl_val); 92 char *fgrep(FILE *inf, const char *str); 93 int taskset_benchmark(pid_t bm_pid, int cpu_no); 94 void run_benchmark(int signum, siginfo_t *info, void *ucontext); 95 int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, 96 char *resctrl_val); 97 int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp, 98 char *resctrl_val); 99 int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, 100 int group_fd, unsigned long flags); 101 int run_fill_buf(unsigned long span, int malloc_and_init_memory, int memflush, 102 int op, char *resctrl_va); 103 int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param); 104 int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd); 105 void tests_cleanup(void); 106 void mbm_test_cleanup(void); 107 int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd); 108 void mba_test_cleanup(void); 109 int get_cbm_mask(char *cache_type, char *cbm_mask); 110 int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size); 111 void ctrlc_handler(int signum, siginfo_t *info, void *ptr); 112 int signal_handler_register(void); 113 void signal_handler_unregister(void); 114 int cat_val(struct resctrl_val_param *param); 115 void cat_test_cleanup(void); 116 int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type); 117 int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd); 118 unsigned int count_bits(unsigned long n); 119 void cmt_test_cleanup(void); 120 int get_core_sibling(int cpu_no); 121 int measure_cache_vals(struct resctrl_val_param *param, int bm_pid); 122 int show_cache_info(unsigned long sum_llc_val, int no_of_bits, 123 unsigned long cache_span, unsigned long max_diff, 124 unsigned long max_diff_percent, unsigned long num_of_runs, 125 bool platform, bool cmt); 126 127 #endif /* RESCTRL_H */ 128