tools/testing/selftests/resctrl/resctrl.h

   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
  27 #define MB                      (1024 * 1024)
  28 #define RESCTRL_PATH            "/sys/fs/resctrl"
  29 #define PHYS_ID_PATH            "/sys/devices/system/cpu/cpu"
  30 #define CBM_MASK_PATH           "/sys/fs/resctrl/info"
  31
  32 #define PARENT_EXIT(err_msg)                    \
  33         do {                                    \
  34                 perror(err_msg);                \
  35                 kill(ppid, SIGKILL);            \
  36                 exit(EXIT_FAILURE);             \
  37         } while (0)
  38
  39 /*
  40  * resctrl_val_param:   resctrl test parameters
  41  * @resctrl_val:        Resctrl feature (Eg: mbm, mba.. etc)
  42  * @ctrlgrp:            Name of the control monitor group (con_mon grp)
  43  * @mongrp:             Name of the monitor group (mon grp)
  44  * @cpu_no:             CPU number to which the benchmark would be binded
  45  * @span:               Memory bytes accessed in each benchmark iteration
  46  * @mum_resctrlfs:      Should the resctrl FS be remounted?
  47  * @filename:           Name of file to which the o/p should be written
  48  * @bw_report:          Bandwidth report type (reads vs writes)
  49  * @setup:              Call back function to setup test environment
  50  */
  51 struct resctrl_val_param {
  52         char            *resctrl_val;
  53         char            ctrlgrp[64];
  54         char            mongrp[64];
  55         int             cpu_no;
  56         unsigned long   span;
  57         int             mum_resctrlfs;
  58         char            filename[64];
  59         char            *bw_report;
  60         unsigned long   mask;
  61         int             num_of_runs;
  62         int             (*setup)(int num, ...);
  63 };
  64
  65 pid_t bm_pid, ppid;
  66 int tests_run;
  67
  68 char llc_occup_path[1024];
  69 bool is_amd;
  70
  71 bool check_resctrlfs_support(void);
  72 int filter_dmesg(void);
  73 int remount_resctrlfs(bool mum_resctrlfs);
  74 int get_resource_id(int cpu_no, int *resource_id);
  75 int umount_resctrlfs(void);
  76 int validate_bw_report_request(char *bw_report);
  77 bool validate_resctrl_feature_request(char *resctrl_val);
  78 char *fgrep(FILE *inf, const char *str);
  79 int taskset_benchmark(pid_t bm_pid, int cpu_no);
  80 void run_benchmark(int signum, siginfo_t *info, void *ucontext);
  81 int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
  82                    char *resctrl_val);
  83 int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
  84                             char *resctrl_val);
  85 int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
  86                     int group_fd, unsigned long flags);
  87 int run_fill_buf(unsigned long span, int malloc_and_init_memory, int memflush,
  88                  int op, char *resctrl_va);
  89 int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
  90 int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd);
  91 void tests_cleanup(void);
  92 void mbm_test_cleanup(void);
  93 int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
  94 void mba_test_cleanup(void);
  95 int get_cbm_mask(char *cache_type);
  96 int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
  97 void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
  98 int cat_val(struct resctrl_val_param *param);
  99 void cat_test_cleanup(void);
 100 int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
 101 int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
 102 unsigned int count_bits(unsigned long n);
 103 void cqm_test_cleanup(void);
 104 int get_core_sibling(int cpu_no);
 105 int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
 106
 107 #endif /* RESCTRL_H */