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selftests/resctrl: Add callback to start a benchmark

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The callback starts a child process and puts the child pid in created
resctrl group with specified memory bandwidth in schemata. The child
starts running benchmark.

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>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Sai Praneeth Prakhya
2020-01-16 13:32:37 -08:00
committed by Shuah Khan
parent 1d3f08687d
commit 7f4d257e3a
2 changed files with 603 additions and 0 deletions
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29
tools/testing/selftests/resctrl/resctrl.h
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@@ -3,6 +3,8 @@
#ifndef RESCTRL_H
#define RESCTRL_H
#include <stdio.h>
#include <stdarg.h>
#include <math.h>
#include <errno.h>
#include <sched.h>
#include <stdlib.h>
@@ -19,6 +21,7 @@
#include <asm/unistd.h>
#include <linux/perf_event.h>
#define MB (1024 * 1024)
#define RESCTRL_PATH "/sys/fs/resctrl"
#define PHYS_ID_PATH "/sys/devices/system/cpu/cpu"
@@ -29,10 +32,35 @@
exit(EXIT_FAILURE); \
} while (0)
/*
* resctrl_val_param: resctrl test parameters
* @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc)
* @ctrlgrp: Name of the control monitor group (con_mon grp)
* @mongrp: Name of the monitor group (mon grp)
* @cpu_no: CPU number to which the benchmark would be binded
* @span: Memory bytes accessed in each benchmark iteration
* @mum_resctrlfs: Should the resctrl FS be remounted?
* @filename: Name of file to which the o/p should be written
* @bw_report: Bandwidth report type (reads vs writes)
* @setup: Call back function to setup test environment
*/
struct resctrl_val_param {
char *resctrl_val;
char ctrlgrp[64];
char mongrp[64];
int cpu_no;
unsigned long span;
int mum_resctrlfs;
char filename[64];
char *bw_report;
int (*setup)(int num, ...);
};
pid_t bm_pid, ppid;
int remount_resctrlfs(bool mum_resctrlfs);
int get_resource_id(int cpu_no, int *resource_id);
int umount_resctrlfs(void);
int validate_bw_report_request(char *bw_report);
bool validate_resctrl_feature_request(char *resctrl_val);
char *fgrep(FILE *inf, const char *str);
@@ -46,5 +74,6 @@ int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
int group_fd, unsigned long flags);
int run_fill_buf(unsigned long span, int malloc_and_init_memory, int memflush,
int op, char *resctrl_va);
int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
#endif /* RESCTRL_H */