1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef RESCTRL_H 3 #define RESCTRL_H 4 #include <stdio.h> 5 #include <math.h> 6 #include <errno.h> 7 #include <sched.h> 8 #include <stdlib.h> 9 #include <unistd.h> 10 #include <string.h> 11 #include <signal.h> 12 #include <dirent.h> 13 #include <stdbool.h> 14 #include <sys/stat.h> 15 #include <sys/ioctl.h> 16 #include <sys/mount.h> 17 #include <sys/types.h> 18 #include <sys/wait.h> 19 #include <sys/select.h> 20 #include <sys/time.h> 21 #include <sys/eventfd.h> 22 #include <asm/unistd.h> 23 #include <linux/perf_event.h> 24 #include "../kselftest.h" 25 26 #define MB (1024 * 1024) 27 #define RESCTRL_PATH "/sys/fs/resctrl" 28 #define PHYS_ID_PATH "/sys/devices/system/cpu/cpu" 29 #define INFO_PATH "/sys/fs/resctrl/info" 30 31 #define ARCH_INTEL 1 32 #define ARCH_AMD 2 33 34 #define END_OF_TESTS 1 35 36 #define BENCHMARK_ARGS 64 37 38 #define DEFAULT_SPAN (250 * MB) 39 40 #define PARENT_EXIT(err_msg) \ 41 do { \ 42 perror(err_msg); \ 43 kill(ppid, SIGKILL); \ 44 umount_resctrlfs(); \ 45 exit(EXIT_FAILURE); \ 46 } while (0) 47 48 /* 49 * resctrl_val_param: resctrl test parameters 50 * @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc) 51 * @ctrlgrp: Name of the control monitor group (con_mon grp) 52 * @mongrp: Name of the monitor group (mon grp) 53 * @cpu_no: CPU number to which the benchmark would be binded 54 * @filename: Name of file to which the o/p should be written 55 * @bw_report: Bandwidth report type (reads vs writes) 56 * @setup: Call back function to setup test environment 57 */ 58 struct resctrl_val_param { 59 char *resctrl_val; 60 char ctrlgrp[64]; 61 char mongrp[64]; 62 int cpu_no; 63 char filename[64]; 64 char *bw_report; 65 unsigned long mask; 66 int num_of_runs; 67 int (*setup)(struct resctrl_val_param *param); 68 }; 69 70 #define MBM_STR "mbm" 71 #define MBA_STR "mba" 72 #define CMT_STR "cmt" 73 #define CAT_STR "cat" 74 75 extern pid_t bm_pid, ppid; 76 77 extern char llc_occup_path[1024]; 78 79 int get_vendor(void); 80 bool check_resctrlfs_support(void); 81 int filter_dmesg(void); 82 int get_resource_id(int cpu_no, int *resource_id); 83 int mount_resctrlfs(void); 84 int umount_resctrlfs(void); 85 int validate_bw_report_request(char *bw_report); 86 bool validate_resctrl_feature_request(const char *resource, const char *feature); 87 char *fgrep(FILE *inf, const char *str); 88 int taskset_benchmark(pid_t bm_pid, int cpu_no); 89 int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, 90 char *resctrl_val); 91 int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp, 92 char *resctrl_val); 93 int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, 94 int group_fd, unsigned long flags); 95 int run_fill_buf(size_t span, int memflush, int op, bool once); 96 int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *param); 97 int mbm_bw_change(int cpu_no, const char * const *benchmark_cmd); 98 void tests_cleanup(void); 99 void mbm_test_cleanup(void); 100 int mba_schemata_change(int cpu_no, const char * const *benchmark_cmd); 101 void mba_test_cleanup(void); 102 int get_cbm_mask(char *cache_type, char *cbm_mask); 103 int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size); 104 void ctrlc_handler(int signum, siginfo_t *info, void *ptr); 105 int signal_handler_register(void); 106 void signal_handler_unregister(void); 107 int cat_val(struct resctrl_val_param *param, size_t span); 108 void cat_test_cleanup(void); 109 int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type); 110 int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd); 111 unsigned int count_bits(unsigned long n); 112 void cmt_test_cleanup(void); 113 int get_core_sibling(int cpu_no); 114 int measure_cache_vals(struct resctrl_val_param *param, int bm_pid); 115 int show_cache_info(unsigned long sum_llc_val, int no_of_bits, 116 size_t cache_span, unsigned long max_diff, 117 unsigned long max_diff_percent, unsigned long num_of_runs, 118 bool platform, bool cmt); 119 120 #endif /* RESCTRL_H */ 121