Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 */
60struct 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
78extern pid_t bm_pid, ppid;
79
80extern char llc_occup_path[1024];
81
82int get_vendor(void);
83bool check_resctrlfs_support(void);
84int filter_dmesg(void);
85int get_resource_id(int cpu_no, int *resource_id);
86int mount_resctrlfs(void);
87int umount_resctrlfs(void);
88int validate_bw_report_request(char *bw_report);
89bool validate_resctrl_feature_request(const char *resctrl_val);
90char *fgrep(FILE *inf, const char *str);
91int taskset_benchmark(pid_t bm_pid, int cpu_no);
92void run_benchmark(int signum, siginfo_t *info, void *ucontext);
93int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
94 char *resctrl_val);
95int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
96 char *resctrl_val);
97int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
98 int group_fd, unsigned long flags);
99int run_fill_buf(size_t span, int memflush, int op, bool once);
100int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
101int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd);
102void tests_cleanup(void);
103void mbm_test_cleanup(void);
104int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
105void mba_test_cleanup(void);
106int get_cbm_mask(char *cache_type, char *cbm_mask);
107int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
108void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
109int signal_handler_register(void);
110void signal_handler_unregister(void);
111int cat_val(struct resctrl_val_param *param);
112void cat_test_cleanup(void);
113int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
114int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
115unsigned int count_bits(unsigned long n);
116void cmt_test_cleanup(void);
117int get_core_sibling(int cpu_no);
118int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
119int 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 */