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Message-Id: <20240311135230.7007-8-ilpo.jarvinen@linux.intel.com>
Date: Mon, 11 Mar 2024 15:52:24 +0200
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: linux-kselftest@...r.kernel.org,
Reinette Chatre <reinette.chatre@...el.com>,
Shuah Khan <shuah@...nel.org>,
Babu Moger <babu.moger@....com>,
Maciej Wieczór-Retman <maciej.wieczor-retman@...el.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>,
linux-kernel@...r.kernel.org,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v2 07/13] selftests/resctrl: Add ->measure() callback to resctrl_val_param
The measurement done in resctrl_val() varies depending on test type.
The decision for how to measure is decided based on the string compare
to test name which is quite inflexible.
Add ->measure() callback into the struct resctrl_val_param to allow
each test to provide necessary code as a function which simplifies what
resctrl_val() has to do.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
v2:
- spaces -> tabs
---
tools/testing/selftests/resctrl/cmt_test.c | 8 ++++++++
tools/testing/selftests/resctrl/mba_test.c | 9 ++++++++-
tools/testing/selftests/resctrl/mbm_test.c | 9 ++++++++-
tools/testing/selftests/resctrl/resctrl.h | 6 ++++++
tools/testing/selftests/resctrl/resctrl_val.c | 18 +++++-------------
5 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index a81f91222a89..241c0b129b58 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -29,6 +29,13 @@ static int cmt_setup(const struct resctrl_test *test,
return 0;
}
+static int cmt_measure(const struct user_params *uparams,
+ struct resctrl_val_param *param, pid_t bm_pid)
+{
+ sleep(1);
+ return measure_llc_resctrl(param->filename, bm_pid);
+}
+
static int show_results_info(unsigned long sum_llc_val, int no_of_bits,
unsigned long cache_span, unsigned long max_diff,
unsigned long max_diff_percent, unsigned long num_of_runs,
@@ -133,6 +140,7 @@ static int cmt_run_test(const struct resctrl_test *test, const struct user_param
.mask = ~(long_mask << n) & long_mask,
.num_of_runs = 0,
.setup = cmt_setup,
+ .measure = cmt_measure,
};
span = cache_portion_size(cache_total_size, param.mask, long_mask);
diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index 7946e32e85c8..0939f86514f7 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -51,6 +51,12 @@ static int mba_setup(const struct resctrl_test *test,
return 0;
}
+static int mba_measure(const struct user_params *uparams,
+ struct resctrl_val_param *param, pid_t bm_pid)
+{
+ return measure_mem_bw(uparams, param, bm_pid);
+}
+
static bool show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc)
{
int allocation, runs;
@@ -150,7 +156,8 @@ static int mba_run_test(const struct resctrl_test *test, const struct user_param
.mongrp = "m1",
.filename = RESULT_FILE_NAME,
.bw_report = "reads",
- .setup = mba_setup
+ .setup = mba_setup,
+ .measure = mba_measure,
};
int ret;
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index d67ffa3ec63a..17398cd3aace 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -105,6 +105,12 @@ static int mbm_setup(const struct resctrl_test *test,
return ret;
}
+static int mbm_measure(const struct user_params *uparams,
+ struct resctrl_val_param *param, pid_t bm_pid)
+{
+ return measure_mem_bw(uparams, param, bm_pid);
+}
+
void mbm_test_cleanup(void)
{
remove(RESULT_FILE_NAME);
@@ -118,7 +124,8 @@ static int mbm_run_test(const struct resctrl_test *test, const struct user_param
.mongrp = "m1",
.filename = RESULT_FILE_NAME,
.bw_report = "reads",
- .setup = mbm_setup
+ .setup = mbm_setup,
+ .measure = mbm_measure,
};
int ret;
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 90fc00a61d72..2da642e11b61 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -85,6 +85,7 @@ struct resctrl_test {
* @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
+ * @measure: Callback that performs the measurement (a single test)
*/
struct resctrl_val_param {
char *resctrl_val;
@@ -97,6 +98,9 @@ struct resctrl_val_param {
int (*setup)(const struct resctrl_test *test,
const struct user_params *uparams,
struct resctrl_val_param *param);
+ int (*measure)(const struct user_params *uparams,
+ struct resctrl_val_param *param,
+ pid_t bm_pid);
};
struct perf_event_read {
@@ -143,6 +147,8 @@ 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 measure_mem_bw(const struct user_params *uparams,
+ struct resctrl_val_param *param, pid_t bm_pid);
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 80e5174df828..13d89d24474e 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -616,8 +616,8 @@ static void initialize_llc_occu_resctrl(const char *ctrlgrp, const char *mongrp,
* @param: parameters passed to resctrl_val()
* @bm_pid: PID that runs the benchmark
*/
-static int measure_mem_bw(const struct user_params *uparams,
- struct resctrl_val_param *param, pid_t bm_pid)
+int measure_mem_bw(const struct user_params *uparams,
+ struct resctrl_val_param *param, pid_t bm_pid)
{
unsigned long bw_resc, bw_resc_start, bw_resc_end;
float bw_imc;
@@ -870,17 +870,9 @@ int resctrl_val(const struct resctrl_test *test,
if (ret < 0)
break;
- if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
- !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
- ret = measure_mem_bw(uparams, param, bm_pid);
- if (ret)
- break;
- } else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
- sleep(1);
- ret = measure_llc_resctrl(param->filename, bm_pid);
- if (ret)
- break;
- }
+ ret = param->measure(uparams, param, bm_pid);
+ if (ret)
+ break;
}
out:
--
2.39.2
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