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