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Date: Sun, 7 Mar 2021 14:54:50 +0000
From: Fenghua Yu <fenghua.yu@...el.com>
To: "Shuah Khan" <shuah@...nel.org>, "Tony Luck" <tony.luck@...el.com>,
"Reinette Chatre" <reinette.chatre@...el.com>,
"Babu Moger" <babu.moger@....com>
Cc: "linux-kselftest" <linux-kselftest@...r.kernel.org>,
"linux-kernel" <linux-kernel@...r.kernel.org>,
Fenghua Yu <fenghua.yu@...el.com>
Subject: [PATCH v5 09/21] selftests/resctrl: Share show_cache_info() by CAT and CMT tests
show_cache_info() functions are defined separately in CAT and CMT
tests. But the functions are same for the tests and unnecessary
to be defined separately. Share the function by the tests.
Suggested-by: Shuah Khan <shuah@...nel.org>
Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
---
Change Log:
v5:
- Add this patch (Shuah)
tools/testing/selftests/resctrl/cache.c | 42 ++++++++++++++++++++++
tools/testing/selftests/resctrl/cat_test.c | 28 ++-------------
tools/testing/selftests/resctrl/cmt_test.c | 33 ++---------------
tools/testing/selftests/resctrl/resctrl.h | 4 +++
4 files changed, 52 insertions(+), 55 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index 2aa1b5c7d9e1..eaf5116b112c 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -270,3 +270,45 @@ int cat_val(struct resctrl_val_param *param)
return ret;
}
+
+/*
+ * show_cache_info: show cache test result information
+ * @sum_llc_val: sum of LLC cache result data
+ * @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.
+ */
+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)
+{
+ unsigned long avg_llc_val = 0;
+ float diff_percent;
+ long avg_diff = 0;
+ int ret;
+
+ avg_llc_val = sum_llc_val / (num_of_runs - 1);
+ 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("%scache miss rate within %d%%\n",
+ ret ? "fail: " : "", 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",
+ cache_span);
+
+ return ret;
+}
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
index 0deb38ed971b..109363e9a7d7 100644
--- a/tools/testing/selftests/resctrl/cat_test.c
+++ b/tools/testing/selftests/resctrl/cat_test.c
@@ -52,30 +52,6 @@ static int cat_setup(int num, ...)
return ret;
}
-static int show_cache_info(unsigned long sum_llc_perf_miss, int no_of_bits,
- unsigned long span)
-{
- unsigned long allocated_cache_lines = span / 64;
- unsigned long avg_llc_perf_miss = 0;
- float diff_percent;
- int ret;
-
- avg_llc_perf_miss = sum_llc_perf_miss / (NUM_OF_RUNS - 1);
- diff_percent = ((float)allocated_cache_lines - avg_llc_perf_miss) /
- allocated_cache_lines * 100;
-
- ret = !is_amd && abs((int)diff_percent) > MAX_DIFF_PERCENT;
- ksft_print_msg("cache miss rate %swithin %d%%\n",
- ret ? "not " : "", 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("Avg_llc_perf_miss: %lu\n", avg_llc_perf_miss);
- ksft_print_msg("Allocated cache lines: %lu\n", allocated_cache_lines);
-
- return ret;
-}
-
static int check_results(struct resctrl_val_param *param)
{
char *token_array[8], temp[512];
@@ -111,7 +87,9 @@ static int check_results(struct resctrl_val_param *param)
fclose(fp);
no_of_bits = count_bits(param->mask);
- return show_cache_info(sum_llc_perf_miss, no_of_bits, param->span);
+ return show_cache_info(sum_llc_perf_miss, no_of_bits, param->span / 64,
+ MAX_DIFF, MAX_DIFF_PERCENT, NUM_OF_RUNS,
+ !is_amd, false);
}
void cat_test_cleanup(void)
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index e5af19335115..4adb92cb6ca1 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -39,35 +39,6 @@ static int cmt_setup(int num, ...)
return 0;
}
-static int show_cache_info(unsigned long sum_llc_occu_resc, int no_of_bits,
- unsigned long span)
-{
- unsigned long avg_llc_occu_resc = 0;
- float diff_percent;
- long avg_diff = 0;
- int ret;
-
- avg_llc_occu_resc = sum_llc_occu_resc / (NUM_OF_RUNS - 1);
- avg_diff = (long)abs(span - avg_llc_occu_resc);
-
- diff_percent = (((float)span - avg_llc_occu_resc) / span) * 100;
-
- ret = (abs((int)diff_percent) > MAX_DIFF_PERCENT) &&
- (abs(avg_diff) > MAX_DIFF);
-
- ksft_print_msg("%scache miss diff within %d, %d\%%\n",
- ret ? "fail: " : "not", MAX_DIFF, (int)MAX_DIFF_PERCENT);
-
- ksft_print_msg("diff: %ld\n", avg_diff);
- ksft_print_msg("percent diff=%d\n", abs((int)diff_percent));
- ksft_print_msg("Results are displayed in (Bytes)\n");
- ksft_print_msg("Number of bits: %d\n", no_of_bits);
- ksft_print_msg("Avg_llc_occu_resc: %lu\n", avg_llc_occu_resc);
- ksft_print_msg("llc_occu_exp (span): %lu\n", span);
-
- return ret;
-}
-
static int check_results(struct resctrl_val_param *param, int no_of_bits)
{
char *token_array[8], temp[512];
@@ -99,7 +70,9 @@ 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);
+ return show_cache_info(sum_llc_occu_resc, no_of_bits, param->span,
+ MAX_DIFF, MAX_DIFF_PERCENT, NUM_OF_RUNS,
+ true, true);
}
void cmt_test_cleanup(void)
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index ebf88217f9de..81f322245ef7 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -108,5 +108,9 @@ 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 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);
#endif /* RESCTRL_H */
--
2.30.1
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