LXR linux/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#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 CBM_MASK_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 PARENT_EXIT(err_msg)                    \
  38        do {                                    \
  39                perror(err_msg);                \
  40                kill(ppid, SIGKILL);            \
  41                exit(EXIT_FAILURE);             \
  42        } while (0)
  43
  44/*
  45 * resctrl_val_param:   resctrl test parameters
  46 * @resctrl_val:        Resctrl feature (Eg: mbm, mba.. etc)
  47 * @ctrlgrp:            Name of the control monitor group (con_mon grp)
  48 * @mongrp:             Name of the monitor group (mon grp)
  49 * @cpu_no:             CPU number to which the benchmark would be binded
  50 * @span:               Memory bytes accessed in each benchmark iteration
  51 * @mum_resctrlfs:      Should the resctrl FS be remounted?
  52 * @filename:           Name of file to which the o/p should be written
  53 * @bw_report:          Bandwidth report type (reads vs writes)
  54 * @setup:              Call back function to setup test environment
  55 */
  56struct resctrl_val_param {
  57        char            *resctrl_val;
  58        char            ctrlgrp[64];
  59        char            mongrp[64];
  60        int             cpu_no;
  61        unsigned long   span;
  62        int             mum_resctrlfs;
  63        char            filename[64];
  64        char            *bw_report;
  65        unsigned long   mask;
  66        int             num_of_runs;
  67        int             (*setup)(int num, ...);
  68};
  69
  70#define MBM_STR                 "mbm"
  71#define MBA_STR                 "mba"
  72#define CMT_STR                 "cmt"
  73#define CAT_STR                 "cat"
  74
  75extern pid_t bm_pid, ppid;
  76
  77extern char llc_occup_path[1024];
  78extern bool is_amd;
  79
  80bool check_resctrlfs_support(void);
  81int filter_dmesg(void);
  82int remount_resctrlfs(bool mum_resctrlfs);
  83int get_resource_id(int cpu_no, int *resource_id);
  84int umount_resctrlfs(void);
  85int validate_bw_report_request(char *bw_report);
  86bool validate_resctrl_feature_request(const char *resctrl_val);
  87char *fgrep(FILE *inf, const char *str);
  88int taskset_benchmark(pid_t bm_pid, int cpu_no);
  89void run_benchmark(int signum, siginfo_t *info, void *ucontext);
  90int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
  91                   char *resctrl_val);
  92int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
  93                            char *resctrl_val);
  94int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
  95                    int group_fd, unsigned long flags);
  96int run_fill_buf(unsigned long span, int malloc_and_init_memory, int memflush,
  97                 int op, char *resctrl_va);
  98int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
  99int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd);
 100void tests_cleanup(void);
 101void mbm_test_cleanup(void);
 102int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
 103void mba_test_cleanup(void);
 104int get_cbm_mask(char *cache_type, char *cbm_mask);
 105int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
 106void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
 107int cat_val(struct resctrl_val_param *param);
 108void cat_test_cleanup(void);
 109int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
 110int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
 111unsigned int count_bits(unsigned long n);
 112void cmt_test_cleanup(void);
 113int get_core_sibling(int cpu_no);
 114int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
 115int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
 116                    unsigned long 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