Commit 74e76cba authored by Maciej Wieczor-Retman's avatar Maciej Wieczor-Retman Committed by Shuah Khan
Browse files

selftests/resctrl: Add resource_info_file_exists() 



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: default avatarMaciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent 00616416

tools/testing/selftests/resctrl/resctrl.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

tools/testing/selftests/resctrl/resctrlfs.c

+25 −0
Original line number Diff line number Diff line
@@ -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);