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Date: Wed, 12 Apr 2023 16:21:21 +0300
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
Reinette Chatre <reinette.chatre@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>,
Shuah Khan <shuah@...nel.org>
Cc: Shaopeng Tan <tan.shaopeng@...fujitsu.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH 21/22] selftests/resctrl: Split show_cache_info() to test specific and generic parts
show_cache_info() attempts to do calculate the results and provide
generic cache information. It makes hard to alter the pass/fail
conditions.
Separate the the test specific checks into CAT and CMT test files and
leave only the generic information part into show_cache_info().
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
tools/testing/selftests/resctrl/cache.c | 40 ++++------------------
tools/testing/selftests/resctrl/cat_test.c | 30 ++++++++++++++--
tools/testing/selftests/resctrl/cmt_test.c | 32 +++++++++++++++--
tools/testing/selftests/resctrl/resctrl.h | 6 ++--
4 files changed, 65 insertions(+), 43 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index 225ba589d230..becca3ce4f9e 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -283,43 +283,17 @@ int cat_val(struct resctrl_val_param *param)
}
/*
- * show_cache_info: show cache test result information
- * @sum_llc_val: sum of LLC cache result data
+ * show_cache_info: show generic cache test information
* @no_of_bits: number of bits
- * @cache_span: cache span in bytes for CMT or in lines for CAT
- * @max_diff: max difference
- * @max_diff_percent: max difference percentage
- * @num_of_runs: number of runs
- * @platform: show test information on this platform
- * @cmt: CMT test or CAT test
- *
- * Return: 0 on success. non-zero on failure.
+ * @avg_llc_val: avg of LLC cache result data
+ * @cache_span: cache span
+ * @lines: cache span in lines or bytes
*/
-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,
- bool platform, bool cmt)
+void show_cache_info(int no_of_bits, unsigned long avg_llc_val,
+ unsigned long cache_span, bool lines)
{
- unsigned long avg_llc_val = 0;
- float diff_percent;
- long avg_diff = 0;
- int ret;
-
- avg_llc_val = sum_llc_val / num_of_runs;
- avg_diff = (long)abs(cache_span - avg_llc_val);
- diff_percent = ((float)cache_span - avg_llc_val) / cache_span * 100;
-
- ret = platform && abs((int)diff_percent) > max_diff_percent &&
- (cmt ? (abs(avg_diff) > max_diff) : true);
-
- ksft_print_msg("%s Check cache miss rate within %d%%\n",
- ret ? "Fail:" : "Pass:", max_diff_percent);
-
- ksft_print_msg("Percent diff=%d\n", abs((int)diff_percent));
ksft_print_msg("Number of bits: %d\n", no_of_bits);
ksft_print_msg("Average LLC val: %lu\n", avg_llc_val);
- ksft_print_msg("Cache span (%s): %lu\n", cmt ? "bytes" : "lines",
+ ksft_print_msg("Cache span (%s): %lu\n", !lines ? "bytes" : "lines",
cache_span);
-
- return ret;
}
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
index cfad7e488340..d2b7369ad00e 100644
--- a/tools/testing/selftests/resctrl/cat_test.c
+++ b/tools/testing/selftests/resctrl/cat_test.c
@@ -41,6 +41,30 @@ static int cat_setup(struct resctrl_val_param *p)
return ret;
}
+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,
+ bool platform)
+{
+ unsigned long avg_llc_val = 0;
+ float diff_percent;
+ int ret;
+
+ avg_llc_val = sum_llc_val / num_of_runs;
+ diff_percent = ((float)cache_span - avg_llc_val) / cache_span * 100;
+
+ ret = platform && abs((int)diff_percent) > max_diff_percent;
+
+ ksft_print_msg("%s Check cache miss rate within %d%%\n",
+ ret ? "Fail:" : "Pass:", max_diff_percent);
+
+ ksft_print_msg("Percent diff=%d\n", abs((int)diff_percent));
+
+ show_cache_info(no_of_bits, avg_llc_val, cache_span, true);
+
+ return ret;
+}
+
static int check_results(struct resctrl_val_param *param)
{
char *token_array[8], temp[512];
@@ -76,9 +100,9 @@ static int check_results(struct resctrl_val_param *param)
fclose(fp);
no_of_bits = count_consecutive_bits(param->mask, NULL);
- return show_cache_info(sum_llc_perf_miss, no_of_bits, param->span / 64,
- MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
- get_vendor() == ARCH_INTEL, false);
+ return show_results_info(sum_llc_perf_miss, no_of_bits, param->span / 64,
+ MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
+ get_vendor() == ARCH_INTEL);
}
void cat_test_cleanup(void)
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index 8fda7fc4d159..6f06f70d81cf 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -27,6 +27,33 @@ static int cmt_setup(struct resctrl_val_param *p)
return 0;
}
+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,
+ bool platform)
+{
+ unsigned long avg_llc_val = 0;
+ float diff_percent;
+ long avg_diff = 0;
+ int ret;
+
+ avg_llc_val = sum_llc_val / num_of_runs;
+ avg_diff = (long)abs(cache_span - avg_llc_val);
+ diff_percent = ((float)cache_span - avg_llc_val) / cache_span * 100;
+
+ ret = platform && abs((int)diff_percent) > max_diff_percent &&
+ abs(avg_diff) > max_diff;
+
+ ksft_print_msg("%s Check cache miss rate within %d%%\n",
+ ret ? "Fail:" : "Pass:", max_diff_percent);
+
+ ksft_print_msg("Percent diff=%d\n", abs((int)diff_percent));
+
+ show_cache_info(no_of_bits, avg_llc_val, cache_span, false);
+
+ return ret;
+}
+
static int check_results(struct resctrl_val_param *param, int no_of_bits)
{
char *token_array[8], temp[512];
@@ -58,9 +85,8 @@ static int check_results(struct resctrl_val_param *param, int no_of_bits)
}
fclose(fp);
- return show_cache_info(sum_llc_occu_resc, no_of_bits, param->span,
- MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
- true, true);
+ return show_results_info(sum_llc_occu_resc, no_of_bits, param->span,
+ MAX_DIFF, MAX_DIFF_PERCENT, runs - 1, true);
}
void cmt_test_cleanup(void)
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 028b979c28fb..26061db0b9ea 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -125,9 +125,7 @@ unsigned int count_bits(unsigned long n);
void cmt_test_cleanup(void);
int get_core_sibling(int cpu_no);
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,
- bool platform, bool cmt);
+void show_cache_info(int no_of_bits, unsigned long avg_llc_val,
+ unsigned long cache_span, bool lines);
#endif /* RESCTRL_H */
--
2.30.2
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