Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-06 19:11:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

selftests/resctrl: Add resource_info_file_exists()

Browse Source 
Feature checking done by resctrl_mon_feature_exists() covers features
represented by the feature name presence inside the 'mon_features' file
in /sys/fs/resctrl/info/L3_MON directory. There exists a different way
to represent feature support and that is by the presence of 0 or 1 in a
single file in the info/resource directory. In this case the filename
represents what feature support is being indicated.

Add a generic function to check file presence in the
/sys/fs/resctrl/info/<RESOURCE> directory.

Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Maciej Wieczor-Retman 2024-02-16 09:35:41 +01:00 committed by Shuah Khan
parent 0061641648
commit 74e76cbabd
2 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/resctrl/resctrl.h
View File

@ -138,6 +138,7 @@ int umount_resctrlfs(void);
int validate_bw_report_request(char *bw_report);
bool resctrl_resource_exists(const char *resource);
bool resctrl_mon_feature_exists(const char *resource, const char *feature);
bool resource_info_file_exists(const char *resource, const char *file);
bool test_resource_feature_check(const struct resctrl_test *test);
char *fgrep(FILE *inf, const char *str);
int taskset_benchmark(pid_t bm_pid, int cpu_no, cpu_set_t *old_affinity);

25
tools/testing/selftests/resctrl/resctrlfs.c
View File

@ -764,6 +764,31 @@ bool resctrl_mon_feature_exists(const char *resource, const char *feature)
return !!res;
}
/*
* resource_info_file_exists - Check if a file is present inside
* /sys/fs/resctrl/info/@resource.
* @resource: Required resource (Eg: MB, L3, L2, etc.)
* @file: Required file.
*
* Return: True if the /sys/fs/resctrl/info/@resource/@file exists, else false.
*/
bool resource_info_file_exists(const char *resource, const char *file)
{
char res_path[PATH_MAX];
struct stat statbuf;
if (!file || !resource)
return false;
snprintf(res_path, sizeof(res_path), "%s/%s/%s", INFO_PATH, resource,
file);
if (stat(res_path, &statbuf))
return false;
return true;
}
bool test_resource_feature_check(const struct resctrl_test *test)
{
return resctrl_resource_exists(test->resource);