[v3,3/5] selftests/resctrl: Split validate_resctrl_feature_request()
Commit Message
validate_resctrl_feature_request() is used to test both if a resource is
present in the info directory, and if a passed monitoring feature is
present in the mon_features file.
Refactor validate_resctrl_feature_request() into two smaller functions
that each accomplish one check to give feature checking more
granularity:
- Resource directory presence in the /sys/fs/resctrl/info directory.
- Feature name presence in the /sys/fs/resctrl/info/L3_MON/mon_features
file.
Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
---
Changelog v3:
- Move new function to a separate patch. (Reinette)
- Rewrite resctrl_mon_feature_exists() only for L3_MON.
Changelog v2:
- Add this patch.
tools/testing/selftests/resctrl/cmt_test.c | 4 +--
tools/testing/selftests/resctrl/mba_test.c | 4 +--
tools/testing/selftests/resctrl/mbm_test.c | 6 ++--
tools/testing/selftests/resctrl/resctrl.h | 3 +-
tools/testing/selftests/resctrl/resctrlfs.c | 33 +++++++++++++--------
5 files changed, 30 insertions(+), 20 deletions(-)
Comments
On Thu, 25 Jan 2024, Maciej Wieczor-Retman wrote:
> validate_resctrl_feature_request() is used to test both if a resource is
> present in the info directory, and if a passed monitoring feature is
> present in the mon_features file.
>
> Refactor validate_resctrl_feature_request() into two smaller functions
> that each accomplish one check to give feature checking more
> granularity:
> - Resource directory presence in the /sys/fs/resctrl/info directory.
> - Feature name presence in the /sys/fs/resctrl/info/L3_MON/mon_features
> file.
>
> Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
> ---
> Changelog v3:
> - Move new function to a separate patch. (Reinette)
> - Rewrite resctrl_mon_feature_exists() only for L3_MON.
>
> Changelog v2:
> - Add this patch.
>
> tools/testing/selftests/resctrl/cmt_test.c | 4 +--
> tools/testing/selftests/resctrl/mba_test.c | 4 +--
> tools/testing/selftests/resctrl/mbm_test.c | 6 ++--
> tools/testing/selftests/resctrl/resctrl.h | 3 +-
> tools/testing/selftests/resctrl/resctrlfs.c | 33 +++++++++++++--------
> 5 files changed, 30 insertions(+), 20 deletions(-)
>
> diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
> index dd5ca343c469..428de9df81c8 100644
> --- a/tools/testing/selftests/resctrl/cmt_test.c
> +++ b/tools/testing/selftests/resctrl/cmt_test.c
> @@ -169,8 +169,8 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param
>
> static bool cmt_feature_check(const struct resctrl_test *test)
> {
> - return test_resource_feature_check(test) &&
> - validate_resctrl_feature_request("L3_MON", "llc_occupancy");
> + return resctrl_mon_feature_exists("llc_occupancy") &&
> + resctrl_resource_exists("L3");
> }
>
> struct resctrl_test cmt_test = {
> diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
> index da256d2dbe5c..e22285b80e37 100644
> --- a/tools/testing/selftests/resctrl/mba_test.c
> +++ b/tools/testing/selftests/resctrl/mba_test.c
> @@ -170,8 +170,8 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param
>
> static bool mba_feature_check(const struct resctrl_test *test)
> {
> - return test_resource_feature_check(test) &&
> - validate_resctrl_feature_request("L3_MON", "mbm_local_bytes");
> + return resctrl_resource_exists(test->resource) &&
I don't understand what's the advantage of converting away from
test_resource_feature_check() in CMT and MBA case?
> + resctrl_mon_feature_exists("mbm_local_bytes");
> }
> @@ -756,7 +765,7 @@ bool validate_resctrl_feature_request(const char *resource, const char *feature)
>
> bool test_resource_feature_check(const struct resctrl_test *test)
> {
> - return validate_resctrl_feature_request(test->resource, NULL);
> + return resctrl_resource_exists(test->resource);
..The replacement in MBA open coded test_resource_feature_check() 100%
and CMT even replaces the test->resource with the string matching to
what's in test->resource?
Hi Ilpo,
On 2024-01-25 at 13:46:51 +0200, Ilpo Järvinen wrote:
>On Thu, 25 Jan 2024, Maciej Wieczor-Retman wrote:
>
>> validate_resctrl_feature_request() is used to test both if a resource is
>> present in the info directory, and if a passed monitoring feature is
>> present in the mon_features file.
>>
>> Refactor validate_resctrl_feature_request() into two smaller functions
>> that each accomplish one check to give feature checking more
>> granularity:
>> - Resource directory presence in the /sys/fs/resctrl/info directory.
>> - Feature name presence in the /sys/fs/resctrl/info/L3_MON/mon_features
>> file.
>>
>> Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
>> ---
>> Changelog v3:
>> - Move new function to a separate patch. (Reinette)
>> - Rewrite resctrl_mon_feature_exists() only for L3_MON.
>>
>> Changelog v2:
>> - Add this patch.
>>
>> tools/testing/selftests/resctrl/cmt_test.c | 4 +--
>> tools/testing/selftests/resctrl/mba_test.c | 4 +--
>> tools/testing/selftests/resctrl/mbm_test.c | 6 ++--
>> tools/testing/selftests/resctrl/resctrl.h | 3 +-
>> tools/testing/selftests/resctrl/resctrlfs.c | 33 +++++++++++++--------
>> 5 files changed, 30 insertions(+), 20 deletions(-)
>>
>> diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
>> index dd5ca343c469..428de9df81c8 100644
>> --- a/tools/testing/selftests/resctrl/cmt_test.c
>> +++ b/tools/testing/selftests/resctrl/cmt_test.c
>> @@ -169,8 +169,8 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param
>>
>> static bool cmt_feature_check(const struct resctrl_test *test)
>> {
>> - return test_resource_feature_check(test) &&
>> - validate_resctrl_feature_request("L3_MON", "llc_occupancy");
>> + return resctrl_mon_feature_exists("llc_occupancy") &&
>> + resctrl_resource_exists("L3");
>> }
>>
>> struct resctrl_test cmt_test = {
>> diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
>> index da256d2dbe5c..e22285b80e37 100644
>> --- a/tools/testing/selftests/resctrl/mba_test.c
>> +++ b/tools/testing/selftests/resctrl/mba_test.c
>> @@ -170,8 +170,8 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param
>>
>> static bool mba_feature_check(const struct resctrl_test *test)
>> {
>> - return test_resource_feature_check(test) &&
>> - validate_resctrl_feature_request("L3_MON", "mbm_local_bytes");
>> + return resctrl_resource_exists(test->resource) &&
>
>I don't understand what's the advantage of converting away from
>test_resource_feature_check() in CMT and MBA case?
>
>> + resctrl_mon_feature_exists("mbm_local_bytes");
>> }
>
>> @@ -756,7 +765,7 @@ bool validate_resctrl_feature_request(const char *resource, const char *feature)
>>
>> bool test_resource_feature_check(const struct resctrl_test *test)
>> {
>> - return validate_resctrl_feature_request(test->resource, NULL);
>> + return resctrl_resource_exists(test->resource);
>
>...The replacement in MBA open coded test_resource_feature_check() 100%
>and CMT even replaces the test->resource with the string matching to
>what's in test->resource?
>
You're right, I got carried away with refactoring a bit. I'll keep
test_resource_feature_check() for CMT and MBM. Thanks!
>
>--
> i.
>
@@ -169,8 +169,8 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param
static bool cmt_feature_check(const struct resctrl_test *test)
{
- return test_resource_feature_check(test) &&
- validate_resctrl_feature_request("L3_MON", "llc_occupancy");
+ return resctrl_mon_feature_exists("llc_occupancy") &&
+ resctrl_resource_exists("L3");
}
struct resctrl_test cmt_test = {
@@ -170,8 +170,8 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param
static bool mba_feature_check(const struct resctrl_test *test)
{
- return test_resource_feature_check(test) &&
- validate_resctrl_feature_request("L3_MON", "mbm_local_bytes");
+ return resctrl_resource_exists(test->resource) &&
+ resctrl_mon_feature_exists("mbm_local_bytes");
}
struct resctrl_test mba_test = {
@@ -97,7 +97,7 @@ static int mbm_setup(const struct resctrl_test *test,
return END_OF_TESTS;
/* Set up shemata with 100% allocation on the first run. */
- if (p->num_of_runs == 0 && validate_resctrl_feature_request("MB", NULL))
+ if (p->num_of_runs == 0 && resctrl_resource_exists("MB"))
ret = write_schemata(p->ctrlgrp, "100", uparams->cpu, test->resource);
p->num_of_runs++;
@@ -140,8 +140,8 @@ static int mbm_run_test(const struct resctrl_test *test, const struct user_param
static bool mbm_feature_check(const struct resctrl_test *test)
{
- return validate_resctrl_feature_request("L3_MON", "mbm_total_bytes") &&
- validate_resctrl_feature_request("L3_MON", "mbm_local_bytes");
+ return resctrl_mon_feature_exists("mbm_total_bytes") &&
+ resctrl_mon_feature_exists("mbm_local_bytes");
}
struct resctrl_test mbm_test = {
@@ -136,7 +136,8 @@ int get_domain_id(const char *resource, int cpu_no, int *domain_id);
int mount_resctrlfs(void);
int umount_resctrlfs(void);
int validate_bw_report_request(char *bw_report);
-bool validate_resctrl_feature_request(const char *resource, const char *feature);
+bool resctrl_resource_exists(const char *resource);
+bool resctrl_mon_feature_exists(const char *feature);
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);
@@ -711,20 +711,16 @@ char *fgrep(FILE *inf, const char *str)
}
/*
- * validate_resctrl_feature_request - Check if requested feature is valid.
- * @resource: Required resource (e.g., MB, L3, L2, L3_MON, etc.)
- * @feature: Required monitor feature (in mon_features file). Can only be
- * set for L3_MON. Must be NULL for all other resources.
+ * resctrl_resource_exists - Check if a resource is supported.
+ * @resource: Resctrl resource (e.g., MB, L3, L2, L3_MON, etc.)
*
- * Return: True if the resource/feature is supported, else false. False is
+ * Return: True if the resource is supported, else false. False is
* also returned if resctrl FS is not mounted.
*/
-bool validate_resctrl_feature_request(const char *resource, const char *feature)
+bool resctrl_resource_exists(const char *resource)
{
char res_path[PATH_MAX];
struct stat statbuf;
- char *res;
- FILE *inf;
int ret;
if (!resource)
@@ -739,11 +735,24 @@ bool validate_resctrl_feature_request(const char *resource, const char *feature)
if (stat(res_path, &statbuf))
return false;
+ return true;
+}
+
+/*
+ * resctrl_mon_feature_exists - Check if requested monitoring L3_MON feature is valid.
+ * @feature: Required monitor feature (in mon_features file).
+ *
+ * Return: True if the feature is supported, else false.
+ */
+bool resctrl_mon_feature_exists(const char *feature)
+{
+ char *res;
+ FILE *inf;
+
if (!feature)
- return true;
+ return false;
- snprintf(res_path, sizeof(res_path), "%s/%s/mon_features", INFO_PATH, resource);
- inf = fopen(res_path, "r");
+ inf = fopen("/sys/fs/resctrl/info/L3_MON/mon_features", "r");
if (!inf)
return false;
@@ -756,7 +765,7 @@ bool validate_resctrl_feature_request(const char *resource, const char *feature)
bool test_resource_feature_check(const struct resctrl_test *test)
{
- return validate_resctrl_feature_request(test->resource, NULL);
+ return resctrl_resource_exists(test->resource);
}
int filter_dmesg(void)