78941183d1
Cache QoS Monitoring (CQM) selftest starts stressful cache benchmark with specified size of memory to access the cache. Last Level cache occupancy reported by CQM should be close to the size of the memory. Co-developed-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> Co-developed-by: Babu Moger <babu.moger@amd.com> Signed-off-by: Babu Moger <babu.moger@amd.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#define _GNU_SOURCE
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#ifndef RESCTRL_H
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#define RESCTRL_H
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#include <stdio.h>
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#include <stdarg.h>
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#include <math.h>
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#include <errno.h>
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#include <sched.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <signal.h>
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#include <dirent.h>
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#include <stdbool.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <sys/eventfd.h>
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#include <asm/unistd.h>
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#include <linux/perf_event.h>
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#define MB (1024 * 1024)
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#define RESCTRL_PATH "/sys/fs/resctrl"
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#define PHYS_ID_PATH "/sys/devices/system/cpu/cpu"
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#define CBM_MASK_PATH "/sys/fs/resctrl/info"
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#define PARENT_EXIT(err_msg) \
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do { \
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perror(err_msg); \
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kill(ppid, SIGKILL); \
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exit(EXIT_FAILURE); \
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} while (0)
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/*
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* resctrl_val_param: resctrl test parameters
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* @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc)
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* @ctrlgrp: Name of the control monitor group (con_mon grp)
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* @mongrp: Name of the monitor group (mon grp)
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* @cpu_no: CPU number to which the benchmark would be binded
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* @span: Memory bytes accessed in each benchmark iteration
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* @mum_resctrlfs: Should the resctrl FS be remounted?
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* @filename: Name of file to which the o/p should be written
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* @bw_report: Bandwidth report type (reads vs writes)
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* @setup: Call back function to setup test environment
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*/
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struct resctrl_val_param {
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char *resctrl_val;
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char ctrlgrp[64];
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char mongrp[64];
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int cpu_no;
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unsigned long span;
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int mum_resctrlfs;
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char filename[64];
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char *bw_report;
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unsigned long mask;
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int num_of_runs;
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int (*setup)(int num, ...);
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};
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pid_t bm_pid, ppid;
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int tests_run;
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char llc_occup_path[1024];
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bool check_resctrlfs_support(void);
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int filter_dmesg(void);
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int remount_resctrlfs(bool mum_resctrlfs);
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int get_resource_id(int cpu_no, int *resource_id);
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int umount_resctrlfs(void);
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int validate_bw_report_request(char *bw_report);
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bool validate_resctrl_feature_request(char *resctrl_val);
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char *fgrep(FILE *inf, const char *str);
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int taskset_benchmark(pid_t bm_pid, int cpu_no);
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void run_benchmark(int signum, siginfo_t *info, void *ucontext);
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int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
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char *resctrl_val);
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int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
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char *resctrl_val);
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int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
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int group_fd, unsigned long flags);
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int run_fill_buf(unsigned long span, int malloc_and_init_memory, int memflush,
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int op, char *resctrl_va);
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int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
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int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd);
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void tests_cleanup(void);
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void mbm_test_cleanup(void);
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int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
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void mba_test_cleanup(void);
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int get_cbm_mask(char *cache_type);
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int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
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void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
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int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
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unsigned int count_bits(unsigned long n);
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void cqm_test_cleanup(void);
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int get_core_sibling(int cpu_no);
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int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
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#endif /* RESCTRL_H */
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