1 /* SPDX-License-Identifier: GPL-2.0 */
15 #include <sys/ioctl.h>
16 #include <sys/mount.h>
17 #include <sys/types.h>
19 #include <sys/select.h>
21 #include <sys/eventfd.h>
22 #include <asm/unistd.h>
23 #include <linux/perf_event.h>
24 #include "../kselftest.h"
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"
34 #define END_OF_TESTS 1
36 #define PARENT_EXIT(err_msg) \
39 kill(ppid, SIGKILL); \
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 * @filename: Name of file to which the o/p should be written
52 * @bw_report: Bandwidth report type (reads vs writes)
53 * @setup: Call back function to setup test environment
55 struct resctrl_val_param {
65 int (*setup)(struct resctrl_val_param *param);
73 extern pid_t bm_pid, ppid;
75 extern char llc_occup_path[1024];
78 bool check_resctrlfs_support(void);
79 int filter_dmesg(void);
80 int get_resource_id(int cpu_no, int *resource_id);
81 int mount_resctrlfs(void);
82 int umount_resctrlfs(void);
83 int validate_bw_report_request(char *bw_report);
84 bool validate_resctrl_feature_request(const char *resource, const char *feature);
85 char *fgrep(FILE *inf, const char *str);
86 int taskset_benchmark(pid_t bm_pid, int cpu_no);
87 void run_benchmark(int signum, siginfo_t *info, void *ucontext);
88 int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
90 int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
92 int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
93 int group_fd, unsigned long flags);
94 int run_fill_buf(size_t span, int memflush, int op, bool once);
95 int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
96 int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd);
97 void tests_cleanup(void);
98 void mbm_test_cleanup(void);
99 int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
100 void mba_test_cleanup(void);
101 int get_cbm_mask(char *cache_type, char *cbm_mask);
102 int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
103 void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
104 int signal_handler_register(void);
105 void signal_handler_unregister(void);
106 int cat_val(struct resctrl_val_param *param);
107 void cat_test_cleanup(void);
108 int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
109 int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
110 unsigned int count_bits(unsigned long n);
111 void cmt_test_cleanup(void);
112 int get_core_sibling(int cpu_no);
113 int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
114 int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
115 size_t cache_span, unsigned long max_diff,
116 unsigned long max_diff_percent, unsigned long num_of_runs,
117 bool platform, bool cmt);
119 #endif /* RESCTRL_H */