The struct resctrl_val_param is there to customize behavior inside
resctrl_val() which is currently not used to full extent and there are
number of strcmp()s for test name in resctrl_val done by resctrl_val().
Create ->init() hook into the struct resctrl_val_param to cleanly
do per test initialization.
Remove also unused branches to setup paths and the related #defines
for CMT test.
Signed-off-by: Ilpo Järvinen <[email protected]>
---
v3:
- Rename init functions to <testname>_init()
- Removed tabs intermixed with code
- Leave now common mbm bw filename setup into resctrl_val.c
---
tools/testing/selftests/resctrl/cmt_test.c | 12 +++
tools/testing/selftests/resctrl/mba_test.c | 14 ++++
tools/testing/selftests/resctrl/mbm_test.c | 14 ++++
tools/testing/selftests/resctrl/resctrl.h | 8 +-
tools/testing/selftests/resctrl/resctrl_val.c | 76 +++----------------
5 files changed, 59 insertions(+), 65 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index d8521386cd18..238f514ba7e6 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -16,6 +16,17 @@
#define MAX_DIFF 2000000
#define MAX_DIFF_PERCENT 15
+#define CON_MON_LCC_OCCUP_PATH \
+ "%s/%s/mon_groups/%s/mon_data/mon_L3_%02d/llc_occupancy"
+
+static int cmt_init(const struct resctrl_val_param *param, int domain_id)
+{
+ sprintf(llc_occup_path, CON_MON_LCC_OCCUP_PATH, RESCTRL_PATH,
+ param->ctrlgrp, param->mongrp, domain_id);
+
+ return 0;
+}
+
static int cmt_setup(const struct resctrl_test *test,
const struct user_params *uparams,
struct resctrl_val_param *p)
@@ -139,6 +150,7 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param
.filename = RESULT_FILE_NAME,
.mask = ~(long_mask << n) & long_mask,
.num_of_runs = 0,
+ .init = cmt_init,
.setup = cmt_setup,
.measure = cmt_measure,
};
diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index de6e29faf214..0a95c42f1616 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -17,6 +17,19 @@
#define ALLOCATION_MIN 10
#define ALLOCATION_STEP 10
+static int mba_init(const struct resctrl_val_param *param, int domain_id)
+{
+ int ret;
+
+ ret = initialize_mem_bw_imc();
+ if (ret)
+ return ret;
+
+ initialize_mem_bw_resctrl(param, domain_id);
+
+ return 0;
+}
+
/*
* Change schemata percentage from 100 to 10%. Write schemata to specified
* con_mon grp, mon_grp in resctrl FS.
@@ -156,6 +169,7 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param
.mongrp = "m1",
.filename = RESULT_FILE_NAME,
.bw_report = "reads",
+ .init = mba_init,
.setup = mba_setup,
.measure = mba_measure,
};
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index b88762c4228a..90716917e6ef 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -86,6 +86,19 @@ static int check_results(size_t span)
return ret;
}
+static int mbm_init(const struct resctrl_val_param *param, int domain_id)
+{
+ int ret;
+
+ ret = initialize_mem_bw_imc();
+ if (ret)
+ return ret;
+
+ initialize_mem_bw_resctrl(param, domain_id);
+
+ return 0;
+}
+
static int mbm_setup(const struct resctrl_test *test,
const struct user_params *uparams,
struct resctrl_val_param *p)
@@ -124,6 +137,7 @@ static int mbm_run_test(const struct resctrl_test *test, const struct user_param
.mongrp = "m1",
.filename = RESULT_FILE_NAME,
.bw_report = "reads",
+ .init = mbm_init,
.setup = mbm_setup,
.measure = mbm_measure,
};
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 5dc3def70669..d3fbb957309d 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -86,7 +86,8 @@ struct resctrl_test {
* @mongrp: Name of the monitor group (mon grp)
* @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
+ * @init: Callback function to initialize test environment
+ * @setup: Callback function to setup per test run environment
* @measure: Callback that performs the measurement (a single test)
*/
struct resctrl_val_param {
@@ -97,6 +98,8 @@ struct resctrl_val_param {
char *bw_report;
unsigned long mask;
int num_of_runs;
+ int (*init)(const struct resctrl_val_param *param,
+ int domain_id);
int (*setup)(const struct resctrl_test *test,
const struct user_params *uparams,
struct resctrl_val_param *param);
@@ -149,8 +152,11 @@ unsigned char *alloc_buffer(size_t buf_size, int memflush);
void mem_flush(unsigned char *buf, size_t buf_size);
void fill_cache_read(unsigned char *buf, size_t buf_size, bool once);
int run_fill_buf(size_t buf_size, int memflush, int op, bool once);
+int initialize_mem_bw_imc(void);
int measure_mem_bw(const struct user_params *uparams,
struct resctrl_val_param *param, pid_t bm_pid);
+void initialize_mem_bw_resctrl(const struct resctrl_val_param *param,
+ int domain_id);
int resctrl_val(const struct resctrl_test *test,
const struct user_params *uparams,
const char * const *benchmark_cmd,
diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
index 990648bcc366..d289c17f1f03 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -23,18 +23,6 @@
#define CON_MBM_LOCAL_BYTES_PATH \
"%s/%s/mon_data/mon_L3_%02d/mbm_local_bytes"
-#define CON_MON_LCC_OCCUP_PATH \
- "%s/%s/mon_groups/%s/mon_data/mon_L3_%02d/llc_occupancy"
-
-#define CON_LCC_OCCUP_PATH \
- "%s/%s/mon_data/mon_L3_%02d/llc_occupancy"
-
-#define MON_LCC_OCCUP_PATH \
- "%s/mon_groups/%s/mon_data/mon_L3_%02d/llc_occupancy"
-
-#define LCC_OCCUP_PATH \
- "%s/mon_data/mon_L3_%02d/llc_occupancy"
-
struct membw_read_format {
__u64 value; /* The value of the event */
__u64 time_enabled; /* if PERF_FORMAT_TOTAL_TIME_ENABLED */
@@ -268,7 +256,7 @@ static int num_of_imcs(void)
return count;
}
-static int initialize_mem_bw_imc(void)
+int initialize_mem_bw_imc(void)
{
int imc, j;
@@ -420,26 +408,20 @@ static int get_mem_bw_imc(char *bw_report, float *bw_imc)
/*
* initialize_mem_bw_resctrl: Appropriately populate "mbm_total_path"
- * @ctrlgrp: Name of the control monitor group (con_mon grp)
- * @domain_id: Domain ID (cache ID; for MB, L3 cache ID)
+ * @param: parameters passed to resctrl_val()
+ * @domain_id: Domain ID (cache ID; for MB, L3 cache ID)
*/
-static void initialize_mem_bw_resctrl(const char *ctrlgrp, int domain_id)
+void initialize_mem_bw_resctrl(const struct resctrl_val_param *param,
+ int domain_id)
{
sprintf(mbm_total_path, CON_MBM_LOCAL_BYTES_PATH, RESCTRL_PATH,
- ctrlgrp, domain_id);
+ param->ctrlgrp, domain_id);
}
/*
* Get MBM Local bytes as reported by resctrl FS
- * For MBM,
- * 1. If con_mon grp and mon grp are given, then read from con_mon grp's mon grp
- * 2. If only con_mon grp is given, then read from con_mon grp
- * 3. If both are not given, then read from root con_mon grp
- * For MBA,
- * 1. If con_mon grp is given, then read from it
- * 2. If con_mon grp is not given, then read from root con_mon grp
*/
-static int get_mem_bw_resctrl(unsigned long *mbm_total)
+static int get_mem_bw_resctrl(const char *mbm_total_path, unsigned long *mbm_total)
{
FILE *fp;
@@ -563,35 +545,6 @@ static int print_results_bw(char *filename, pid_t bm_pid, float bw_imc,
return 0;
}
-static void set_cmt_path(const char *ctrlgrp, const char *mongrp, char sock_num)
-{
- if (strlen(ctrlgrp) && strlen(mongrp))
- sprintf(llc_occup_path, CON_MON_LCC_OCCUP_PATH, RESCTRL_PATH,
- ctrlgrp, mongrp, sock_num);
- else if (!strlen(ctrlgrp) && strlen(mongrp))
- sprintf(llc_occup_path, MON_LCC_OCCUP_PATH, RESCTRL_PATH,
- mongrp, sock_num);
- else if (strlen(ctrlgrp) && !strlen(mongrp))
- sprintf(llc_occup_path, CON_LCC_OCCUP_PATH, RESCTRL_PATH,
- ctrlgrp, sock_num);
- else if (!strlen(ctrlgrp) && !strlen(mongrp))
- sprintf(llc_occup_path, LCC_OCCUP_PATH, RESCTRL_PATH, sock_num);
-}
-
-/*
- * initialize_llc_occu_resctrl: Appropriately populate "llc_occup_path"
- * @ctrlgrp: Name of the control monitor group (con_mon grp)
- * @mongrp: Name of the monitor group (mon grp)
- * @domain_id: Domain ID (cache ID; for MB, L3 cache ID)
- * @resctrl_val: Resctrl feature (Eg: cat, cmt.. etc)
- */
-static void initialize_llc_occu_resctrl(const char *ctrlgrp, const char *mongrp,
- int domain_id, char *resctrl_val)
-{
- if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
- set_cmt_path(ctrlgrp, mongrp, domain_id);
-}
-
/*
* measure_mem_bw - Measures memory bandwidth numbers while benchmark runs
* @uparams: User supplied parameters
@@ -616,13 +569,13 @@ int measure_mem_bw(const struct user_params *uparams,
if (ret < 0)
return ret;
- ret = get_mem_bw_resctrl(&bw_resc_start);
+ ret = get_mem_bw_resctrl(mbm_total_path, &bw_resc_start);
if (ret < 0)
return ret;
do_imc_mem_bw_test();
- ret = get_mem_bw_resctrl(&bw_resc_end);
+ ret = get_mem_bw_resctrl(mbm_total_path, &bw_resc_end);
if (ret < 0)
return ret;
@@ -808,16 +761,11 @@ int resctrl_val(const struct resctrl_test *test,
if (ret)
goto out;
- if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
- !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
- ret = initialize_mem_bw_imc();
+ if (param->init) {
+ ret = param->init(param, domain_id);
if (ret)
goto out;
-
- initialize_mem_bw_resctrl(param->ctrlgrp, domain_id);
- } else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
- initialize_llc_occu_resctrl(param->ctrlgrp, param->mongrp,
- domain_id, resctrl_val);
+ }
/* Parent waits for child to be ready. */
close(pipefd[1]);
--
2.39.2
Hi Ilpo,
On 4/8/2024 9:32 AM, Ilpo Järvinen wrote:
> The struct resctrl_val_param is there to customize behavior inside
> resctrl_val() which is currently not used to full extent and there are
> number of strcmp()s for test name in resctrl_val done by resctrl_val().
>
> Create ->init() hook into the struct resctrl_val_param to cleanly
> do per test initialization.
>
> Remove also unused branches to setup paths and the related #defines
> for CMT test.
All these code being moved have a similar pattern to earlier code that
was deleted. It seems to me as though the CMT may also unnecessarily
create a monitor group and have the same opportunity to remove
some of the code being moved around here.
It is starting to look like resctrl_val_param->mongrp is not necessary.
Reinette