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Message-Id: <20231024092634.7122-8-ilpo.jarvinen@linux.intel.com>
Date: Tue, 24 Oct 2023 12:26:17 +0300
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>,
Shaopeng Tan <tan.shaopeng@...fujitsu.com>,
Maciej Wieczór-Retman
<maciej.wieczor-retman@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>
Cc: linux-kernel@...r.kernel.org,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH 07/24] selftests/resctrl: Split measure_cache_vals() function
The measure_cache_vals() function does a different thing depending on
the test case that called it:
- For CAT, it measures LLC perf misses.
- For CMT, it measures LLC occupancy through resctrl.
Split these two functionalities into own functions the CAT and CMT
tests can call directly.
Co-developed-by: Fenghua Yu <fenghua.yu@...el.com>
Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
tools/testing/selftests/resctrl/cache.c | 37 ++++++++++---------
tools/testing/selftests/resctrl/resctrl.h | 2 +-
tools/testing/selftests/resctrl/resctrl_val.c | 2 +-
3 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index bcbca356d56a..299d9508221f 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -170,35 +170,36 @@ static int print_results_cache(char *filename, int bm_pid,
return 0;
}
-int measure_cache_vals(struct resctrl_val_param *param, int bm_pid)
+static int measure_llc_perf(struct resctrl_val_param *param, int bm_pid)
{
- unsigned long llc_perf_miss = 0, llc_occu_resc = 0, llc_value = 0;
+ unsigned long llc_perf_miss = 0;
int ret;
/*
* Measure cache miss from perf.
*/
- if (!strncmp(param->resctrl_val, CAT_STR, sizeof(CAT_STR))) {
- ret = get_llc_perf(&llc_perf_miss);
- if (ret < 0)
- return ret;
- llc_value = llc_perf_miss;
- }
+ ret = get_llc_perf(&llc_perf_miss);
+ if (ret < 0)
+ return ret;
+
+ ret = print_results_cache(param->filename, bm_pid, llc_perf_miss);
+ return ret;
+}
+
+int measure_llc_resctrl(struct resctrl_val_param *param, int bm_pid)
+{
+ unsigned long llc_occu_resc = 0;
+ int ret;
/*
* Measure llc occupancy from resctrl.
*/
- if (!strncmp(param->resctrl_val, CMT_STR, sizeof(CMT_STR))) {
- ret = get_llc_occu_resctrl(&llc_occu_resc);
- if (ret < 0)
- return ret;
- llc_value = llc_occu_resc;
- }
- ret = print_results_cache(param->filename, bm_pid, llc_value);
- if (ret)
+ ret = get_llc_occu_resctrl(&llc_occu_resc);
+ if (ret < 0)
return ret;
- return 0;
+ ret = print_results_cache(param->filename, bm_pid, llc_occu_resc);
+ return ret;
}
/*
@@ -253,7 +254,7 @@ int cat_val(struct resctrl_val_param *param, size_t span)
}
sleep(1);
- ret = measure_cache_vals(param, bm_pid);
+ ret = measure_llc_perf(param, bm_pid);
if (ret)
goto pe_close;
}
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 10fd3161e63a..56afdc190727 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -114,7 +114,7 @@ int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd);
unsigned int count_bits(unsigned long n);
void cmt_test_cleanup(void);
int get_core_sibling(int cpu_no);
-int measure_cache_vals(struct resctrl_val_param *param, int bm_pid);
+int measure_llc_resctrl(struct resctrl_val_param *param, int bm_pid);
int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
size_t cache_span, unsigned long max_diff,
unsigned long max_diff_percent, unsigned long num_of_runs,
diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
index 88789678917b..43ca026c6e0f 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -830,7 +830,7 @@ int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *par
break;
} else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
sleep(1);
- ret = measure_cache_vals(param, bm_pid);
+ ret = measure_llc_resctrl(param, bm_pid);
if (ret)
break;
}
--
2.30.2
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