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e33cb5702a
Benchmark command is used in multiple tests so it should not be mutated by the tests but CMT test alters span argument. Due to the order of tests (CMT test runs last), mutating the span argument in CMT test does not trigger any real problems currently. Mark benchmark_cmd strings as const and setup the benchmark command using pointers. Because the benchmark command becomes const, the input arguments can be used directly. Besides being simpler, using the input arguments directly also removes the internal size restriction. CMT test has to create a copy of the benchmark command before altering the benchmark command. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: "Wieczor-Retman, Maciej" <maciej.wieczor-retman@intel.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
127 lines
4.0 KiB
C
127 lines
4.0 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 <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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#include "../kselftest.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 INFO_PATH "/sys/fs/resctrl/info"
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#define L3_PATH "/sys/fs/resctrl/info/L3"
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#define MB_PATH "/sys/fs/resctrl/info/MB"
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#define L3_MON_PATH "/sys/fs/resctrl/info/L3_MON"
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#define L3_MON_FEATURES_PATH "/sys/fs/resctrl/info/L3_MON/mon_features"
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#define ARCH_INTEL 1
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#define ARCH_AMD 2
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#define END_OF_TESTS 1
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#define BENCHMARK_ARGS 64
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#define DEFAULT_SPAN (250 * MB)
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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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umount_resctrlfs(); \
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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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* @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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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)(struct resctrl_val_param *param);
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};
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#define MBM_STR "mbm"
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#define MBA_STR "mba"
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#define CMT_STR "cmt"
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#define CAT_STR "cat"
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extern pid_t bm_pid, ppid;
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extern char llc_occup_path[1024];
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int get_vendor(void);
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bool check_resctrlfs_support(void);
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int filter_dmesg(void);
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int get_resource_id(int cpu_no, int *resource_id);
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int mount_resctrlfs(void);
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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(const 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(size_t span, int memflush, int op, bool once);
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int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *param);
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int mbm_bw_change(int cpu_no, const char * const *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, const char * const *benchmark_cmd);
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void mba_test_cleanup(void);
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int get_cbm_mask(char *cache_type, char *cbm_mask);
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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 signal_handler_register(void);
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void signal_handler_unregister(void);
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int cat_val(struct resctrl_val_param *param, size_t span);
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void cat_test_cleanup(void);
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int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
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int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd);
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unsigned int count_bits(unsigned long n);
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void cmt_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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int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
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size_t cache_span, unsigned long max_diff,
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unsigned long max_diff_percent, unsigned long num_of_runs,
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bool platform, bool cmt);
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#endif /* RESCTRL_H */
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