From: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
To: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
Reinette Chatre <reinette.chatre@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>, Shuah Khan <shuah@kernel.org>
Cc: "Shaopeng Tan" <tan.shaopeng@jp.fujitsu.com>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Subject: [PATCH 20/22] selftests/resctrl: Split measure_cache_vals() function
Date: Wed, 12 Apr 2023 16:21:20 +0300 [thread overview]
Message-ID: <20230412132122.29452-21-ilpo.jarvinen@linux.intel.com> (raw)
In-Reply-To: <20230412132122.29452-1-ilpo.jarvinen@linux.intel.com>
The measure_cache_vals() function does a different thing depending on
the test case that called it:
- For CAT, it measures LLC perf misses 2.
- For CMT, it measures LLC occupancy through resctrl.
Split these two functionalities such that CMT test calls a new function
called measure_llc_resctrl() to get LLC occupancy through resctrl and
CAT test directly calls get_llc_perf().
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.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, 17 insertions(+), 24 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index 835d5a892524..225ba589d230 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -199,35 +199,20 @@ static int print_results_cache(char *filename, int bm_pid,
return 0;
}
-int measure_cache_vals(struct resctrl_val_param *param, int bm_pid)
+int measure_llc_resctrl(struct resctrl_val_param *param, int bm_pid)
{
- unsigned long llc_perf_miss = 0, llc_occu_resc = 0, llc_value = 0;
+ unsigned long llc_occu_resc = 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;
- }
-
/*
* 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;
}
/*
@@ -241,6 +226,7 @@ int cat_val(struct resctrl_val_param *param)
{
int memflush = 1, operation = 0, ret = 0;
char *resctrl_val = param->resctrl_val;
+ unsigned long llc_perf_miss = 0;
pid_t bm_pid;
if (strcmp(param->filename, "") == 0)
@@ -281,7 +267,14 @@ int cat_val(struct resctrl_val_param *param)
}
sleep(1);
- ret = measure_cache_vals(param, bm_pid);
+
+ /* Measure cache miss from perf */
+ ret = get_llc_perf(&llc_perf_miss);
+ if (ret)
+ break;
+
+ ret = print_results_cache(param->filename, bm_pid,
+ llc_perf_miss);
if (ret)
break;
}
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 7609d5765fcd..028b979c28fb 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -124,7 +124,7 @@ int cmt_resctrl_val(int cpu_no, int n, char **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,
unsigned long 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 8ed6ce565b13..2904bafba4aa 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -749,7 +749,7 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
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
next prev parent reply other threads:[~2023-04-12 13:25 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-12 13:21 [PATCH 00/22] selftests/resctrl: Fixes, cleanups, and rewritten CAT test Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 01/22] selftests/resctrl: Add resctrl.h into build deps Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 02/22] selftests/resctrl: Check also too low values for CBM bits Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 03/22] selftests/resctrl: Make span unsigned long everywhere Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 04/22] selftests/resctrl: Express span in bytes Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 05/22] selftests/resctrl: Remove duplicated preparation for span arg Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 06/22] selftests/resctrl: Don't use variable argument list for ->setup() Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 07/22] selftests/resctrl: Remove "malloc_and_init_memory" param from run_fill_buf() Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 08/22] selftests/resctrl: Split run_fill_buf() to alloc, work, and dealloc helpers Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 09/22] selftests/resctrl: Remove start_buf local variable from buffer alloc func Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 10/22] selftests/resctrl: Don't pass test name to fill_buf Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 11/22] selftests/resctrl: Add flush_buffer() " Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 12/22] selftests/resctrl: Remove test type checks from cat_val() Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 13/22] selftests/resctrl: Refactor get_cbm_mask() Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 14/22] selftests/resctrl: Create cache_alloc_size() helper Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 15/22] selftests/resctrl: Replace count_bits with count_consecutive_bits() Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 16/22] selftests/resctrl: Exclude shareable bits from schemata in CAT test Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 17/22] selftests/resctrl: Pass the real number of tests to show_cache_info() Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 18/22] selftests/resctrl: Move CAT/CMT test global vars to func they are used Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 19/22] selftests/resctrl: Read in less obvious order to defeat prefetch optimizations Ilpo Järvinen
2023-04-12 13:21 ` Ilpo Järvinen [this message]
2023-04-12 13:21 ` [PATCH 21/22] selftests/resctrl: Split show_cache_info() to test specific and generic parts Ilpo Järvinen
2023-04-12 13:21 ` [PATCH 22/22] selftests/resctrl: Rewrite Cache Allocation Technology (CAT) test Ilpo Järvinen
2023-04-13 10:12 ` Ilpo Järvinen
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