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authorLinus Torvalds <torvalds@linux-foundation.org>2021-04-27 18:54:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-27 18:54:01 -0700
commit2a68c268a18317a013961e8faf6eaabc81a94e6b (patch)
tree752f13b0106e616d8973ba639c372a4112f499fb
parent55e6be657b8d774d9a2e67363e5bcbbaf80fdc28 (diff)
parente75074781f1735c1976bc551e29ccf2ba9a4b17f (diff)
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Merge tag 'linux-kselftest-next-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest updates from Shuah Khan: - fixes and updates to resctrl test from Fenghua Yu and Reinette Chatre - fixes to Kselftest documentation, framework - minor spelling correction in timers test * tag 'linux-kselftest-next-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (25 commits) selftests/resctrl: Change a few printed messages Documentation: kselftest: fix path to test module files selftests/resctrl: Create .gitignore to include resctrl_tests selftests/resctrl: Fix checking for < 0 for unsigned values selftests/resctrl: Fix incorrect parsing of iMC counters selftests/resctrl: Fix unmount resctrl FS selftests/resctrl: Skip the test if requested resctrl feature is not supported selftests/resctrl: Modularize resctrl test suite main() function selftests/resctrl: Don't hard code value of "no_of_bits" variable selftests/resctrl: Fix MBA/MBM results reporting format selftests/resctrl: Use resctrl/info for feature detection selftests/resctrl: Check for resctrl mount point only if resctrl FS is supported selftests/resctrl: Add config dependencies selftests/resctrl: Fix a printed message selftests/resctrl: Share show_cache_info() by CAT and CMT tests selftests/resctrl: Call kselftest APIs to log test results selftests/resctrl: Rename CQM test as CMT test selftests/resctrl: Fix missing options "-n" and "-p" selftests/resctrl: Ensure sibling CPU is not same as original CPU selftests/resctrl: Clean up resctrl features check ...
-rw-r--r--Documentation/dev-tools/kselftest.rst4
-rw-r--r--tools/testing/selftests/lib.mk3
-rw-r--r--tools/testing/selftests/resctrl/.gitignore2
-rw-r--r--tools/testing/selftests/resctrl/Makefile2
-rw-r--r--tools/testing/selftests/resctrl/README4
-rw-r--r--tools/testing/selftests/resctrl/cache.c52
-rw-r--r--tools/testing/selftests/resctrl/cat_test.c57
-rw-r--r--tools/testing/selftests/resctrl/cmt_test.c (renamed from tools/testing/selftests/resctrl/cqm_test.c)75
-rw-r--r--tools/testing/selftests/resctrl/config2
-rw-r--r--tools/testing/selftests/resctrl/fill_buf.c4
-rw-r--r--tools/testing/selftests/resctrl/mba_test.c43
-rw-r--r--tools/testing/selftests/resctrl/mbm_test.c42
-rw-r--r--tools/testing/selftests/resctrl/resctrl.h29
-rw-r--r--tools/testing/selftests/resctrl/resctrl_tests.c163
-rw-r--r--tools/testing/selftests/resctrl/resctrl_val.c95
-rw-r--r--tools/testing/selftests/resctrl/resctrlfs.c134
16 files changed, 412 insertions, 299 deletions
diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst
index a901def730d9..dcefee707ccd 100644
--- a/Documentation/dev-tools/kselftest.rst
+++ b/Documentation/dev-tools/kselftest.rst
@@ -239,8 +239,8 @@ using a shell script test runner. ``kselftest/module.sh`` is designed
to facilitate this process. There is also a header file provided to
assist writing kernel modules that are for use with kselftest:
-- ``tools/testing/kselftest/kselftest_module.h``
-- ``tools/testing/kselftest/kselftest/module.sh``
+- ``tools/testing/selftests/kselftest_module.h``
+- ``tools/testing/selftests/kselftest/module.sh``
How to use
----------
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index a5ce26d548e4..be17462fe146 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -74,7 +74,8 @@ ifdef building_out_of_srctree
rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \
fi
@if [ "X$(TEST_PROGS)" != "X" ]; then \
- $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(OUTPUT)/$(TEST_PROGS)) ; \
+ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \
+ $(addprefix $(OUTPUT)/,$(TEST_PROGS))) ; \
else \
$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \
fi
diff --git a/tools/testing/selftests/resctrl/.gitignore b/tools/testing/selftests/resctrl/.gitignore
new file mode 100644
index 000000000000..ab68442b6bc8
--- /dev/null
+++ b/tools/testing/selftests/resctrl/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+resctrl_tests
diff --git a/tools/testing/selftests/resctrl/Makefile b/tools/testing/selftests/resctrl/Makefile
index d585cc1948cc..6bcee2ec91a9 100644
--- a/tools/testing/selftests/resctrl/Makefile
+++ b/tools/testing/selftests/resctrl/Makefile
@@ -1,5 +1,5 @@
CC = $(CROSS_COMPILE)gcc
-CFLAGS = -g -Wall
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
SRCS=$(wildcard *.c)
OBJS=$(SRCS:.c=.o)
diff --git a/tools/testing/selftests/resctrl/README b/tools/testing/selftests/resctrl/README
index 6e5a0ffa18e8..4b36b25b6ac0 100644
--- a/tools/testing/selftests/resctrl/README
+++ b/tools/testing/selftests/resctrl/README
@@ -46,8 +46,8 @@ ARGUMENTS
Parameter '-h' shows usage information.
usage: resctrl_tests [-h] [-b "benchmark_cmd [options]"] [-t test list] [-n no_of_bits]
- -b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM default benchmark is builtin fill_buf
- -t test list: run tests specified in the test list, e.g. -t mbm, mba, cqm, cat
+ -b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT default benchmark is builtin fill_buf
+ -t test list: run tests specified in the test list, e.g. -t mbm, mba, cmt, cat
-n no_of_bits: run cache tests using specified no of bits in cache bit mask
-p cpu_no: specify CPU number to run the test. 1 is default
-h: help
diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index 38dbf4962e33..68ff856d36f0 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -111,7 +111,7 @@ static int get_llc_perf(unsigned long *llc_perf_miss)
/*
* Get LLC Occupancy as reported by RESCTRL FS
- * For CQM,
+ * For CMT,
* 1. If con_mon grp and mon grp given, then read from mon grp in
* con_mon grp
* 2. If only con_mon grp given, then read from con_mon grp
@@ -182,7 +182,7 @@ int measure_cache_vals(struct resctrl_val_param *param, int bm_pid)
/*
* Measure cache miss from perf.
*/
- if (!strcmp(param->resctrl_val, "cat")) {
+ if (!strncmp(param->resctrl_val, CAT_STR, sizeof(CAT_STR))) {
ret = get_llc_perf(&llc_perf_miss);
if (ret < 0)
return ret;
@@ -192,7 +192,7 @@ int measure_cache_vals(struct resctrl_val_param *param, int bm_pid)
/*
* Measure llc occupancy from resctrl.
*/
- if (!strcmp(param->resctrl_val, "cqm")) {
+ if (!strncmp(param->resctrl_val, CMT_STR, sizeof(CMT_STR))) {
ret = get_llc_occu_resctrl(&llc_occu_resc);
if (ret < 0)
return ret;
@@ -234,7 +234,7 @@ int cat_val(struct resctrl_val_param *param)
if (ret)
return ret;
- if ((strcmp(resctrl_val, "cat") == 0)) {
+ if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) {
ret = initialize_llc_perf();
if (ret)
return ret;
@@ -242,7 +242,7 @@ int cat_val(struct resctrl_val_param *param)
/* Test runs until the callback setup() tells the test to stop. */
while (1) {
- if (strcmp(resctrl_val, "cat") == 0) {
+ if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) {
ret = param->setup(1, param);
if (ret) {
ret = 0;
@@ -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("%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",
+ cache_span);
+
+ return ret;
+}
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
index 5da43767b973..cd4f68388e0f 100644
--- a/tools/testing/selftests/resctrl/cat_test.c
+++ b/tools/testing/selftests/resctrl/cat_test.c
@@ -17,10 +17,10 @@
#define MAX_DIFF_PERCENT 4
#define MAX_DIFF 1000000
-int count_of_bits;
-char cbm_mask[256];
-unsigned long long_mask;
-unsigned long cache_size;
+static int count_of_bits;
+static char cbm_mask[256];
+static unsigned long long_mask;
+static unsigned long cache_size;
/*
* Change schemata. Write schemata to specified
@@ -52,27 +52,6 @@ static int cat_setup(int num, ...)
return ret;
}
-static void 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;
-
- 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;
-
- printf("%sok CAT: cache miss rate within %d%%\n",
- !is_amd && abs((int)diff_percent) > MAX_DIFF_PERCENT ?
- "not " : "", MAX_DIFF_PERCENT);
- tests_run++;
- printf("# Percent diff=%d\n", abs((int)diff_percent));
- printf("# Number of bits: %d\n", no_of_bits);
- printf("# Avg_llc_perf_miss: %lu\n", avg_llc_perf_miss);
- printf("# Allocated cache lines: %lu\n", allocated_cache_lines);
-}
-
static int check_results(struct resctrl_val_param *param)
{
char *token_array[8], temp[512];
@@ -80,7 +59,7 @@ static int check_results(struct resctrl_val_param *param)
int runs = 0, no_of_bits = 0;
FILE *fp;
- printf("# Checking for pass/fail\n");
+ ksft_print_msg("Checking for pass/fail\n");
fp = fopen(param->filename, "r");
if (!fp) {
perror("# Cannot open file");
@@ -108,9 +87,9 @@ static int check_results(struct resctrl_val_param *param)
fclose(fp);
no_of_bits = count_bits(param->mask);
- show_cache_info(sum_llc_perf_miss, no_of_bits, param->span);
-
- return 0;
+ 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)
@@ -132,11 +111,8 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
if (ret)
return ret;
- if (!validate_resctrl_feature_request("cat"))
- return -1;
-
/* Get default cbm mask for L3/L2 cache */
- ret = get_cbm_mask(cache_type);
+ ret = get_cbm_mask(cache_type, cbm_mask);
if (ret)
return ret;
@@ -146,15 +122,18 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
ret = get_cache_size(cpu_no, cache_type, &cache_size);
if (ret)
return ret;
- printf("cache size :%lu\n", cache_size);
+ ksft_print_msg("Cache size :%lu\n", cache_size);
/* Get max number of bits from default-cabm mask */
count_of_bits = count_bits(long_mask);
- if (n < 1 || n > count_of_bits - 1) {
- printf("Invalid input value for no_of_bits n!\n");
- printf("Please Enter value in range 1 to %d\n",
- count_of_bits - 1);
+ if (!n)
+ n = count_of_bits / 2;
+
+ if (n > count_of_bits - 1) {
+ ksft_print_msg("Invalid input value for no_of_bits n!\n");
+ ksft_print_msg("Please enter value in range 1 to %d\n",
+ count_of_bits - 1);
return -1;
}
@@ -164,7 +143,7 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
return -1;
struct resctrl_val_param param = {
- .resctrl_val = "cat",
+ .resctrl_val = CAT_STR,
.cpu_no = cpu_no,
.mum_resctrlfs = 0,
.setup = cat_setup,
diff --git a/tools/testing/selftests/resctrl/cqm_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index c8756152bd61..8968e36db99d 100644
--- a/tools/testing/selftests/resctrl/cqm_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Cache Monitoring Technology (CQM) test
+ * Cache Monitoring Technology (CMT) test
*
* Copyright (C) 2018 Intel Corporation
*
@@ -11,17 +11,17 @@
#include "resctrl.h"
#include <unistd.h>
-#define RESULT_FILE_NAME "result_cqm"
+#define RESULT_FILE_NAME "result_cmt"
#define NUM_OF_RUNS 5
#define MAX_DIFF 2000000
#define MAX_DIFF_PERCENT 15
-int count_of_bits;
-char cbm_mask[256];
-unsigned long long_mask;
-unsigned long cache_size;
+static int count_of_bits;
+static char cbm_mask[256];
+static unsigned long long_mask;
+static unsigned long cache_size;
-static int cqm_setup(int num, ...)
+static int cmt_setup(int num, ...)
{
struct resctrl_val_param *p;
va_list param;
@@ -39,38 +39,6 @@ static int cqm_setup(int num, ...)
return 0;
}
-static void 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;
- bool res;
-
- 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;
-
- if ((abs((int)diff_percent) <= MAX_DIFF_PERCENT) ||
- (abs(avg_diff) <= MAX_DIFF))
- res = true;
- else
- res = false;
-
- printf("%sok CQM: diff within %d, %d\%%\n", res ? "" : "not",
- MAX_DIFF, (int)MAX_DIFF_PERCENT);
-
- printf("# diff: %ld\n", avg_diff);
- printf("# percent diff=%d\n", abs((int)diff_percent));
- printf("# Results are displayed in (Bytes)\n");
- printf("# Number of bits: %d\n", no_of_bits);
- printf("# Avg_llc_occu_resc: %lu\n", avg_llc_occu_resc);
- printf("# llc_occu_exp (span): %lu\n", span);
-
- tests_run++;
-}
-
static int check_results(struct resctrl_val_param *param, int no_of_bits)
{
char *token_array[8], temp[512];
@@ -78,7 +46,7 @@ static int check_results(struct resctrl_val_param *param, int no_of_bits)
int runs = 0;
FILE *fp;
- printf("# checking for pass/fail\n");
+ ksft_print_msg("Checking for pass/fail\n");
fp = fopen(param->filename, "r");
if (!fp) {
perror("# Error in opening file\n");
@@ -86,7 +54,7 @@ static int check_results(struct resctrl_val_param *param, int no_of_bits)
return errno;
}
- while (fgets(temp, 1024, fp)) {
+ while (fgets(temp, sizeof(temp), fp)) {
char *token = strtok(temp, ":\t");
int fields = 0;
@@ -101,17 +69,18 @@ static int check_results(struct resctrl_val_param *param, int no_of_bits)
runs++;
}
fclose(fp);
- show_cache_info(sum_llc_occu_resc, no_of_bits, param->span);
- return 0;
+ return show_cache_info(sum_llc_occu_resc, no_of_bits, param->span,
+ MAX_DIFF, MAX_DIFF_PERCENT, NUM_OF_RUNS,
+ true, true);
}
-void cqm_test_cleanup(void)
+void cmt_test_cleanup(void)
{
remove(RESULT_FILE_NAME);
}
-int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
+int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
{
int ret, mum_resctrlfs;
@@ -122,10 +91,10 @@ int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
if (ret)
return ret;
- if (!validate_resctrl_feature_request("cqm"))
+ if (!validate_resctrl_feature_request(CMT_STR))
return -1;
- ret = get_cbm_mask("L3");
+ ret = get_cbm_mask("L3", cbm_mask);
if (ret)
return ret;
@@ -134,18 +103,18 @@ int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
ret = get_cache_size(cpu_no, "L3", &cache_size);
if (ret)
return ret;
- printf("cache size :%lu\n", cache_size);
+ ksft_print_msg("Cache size :%lu\n", cache_size);
count_of_bits = count_bits(long_mask);
if (n < 1 || n > count_of_bits) {
- printf("Invalid input value for numbr_of_bits n!\n");
- printf("Please Enter value in range 1 to %d\n", count_of_bits);
+ ksft_print_msg("Invalid input value for numbr_of_bits n!\n");
+ ksft_print_msg("Please enter value in range 1 to %d\n", count_of_bits);
return -1;
}
struct resctrl_val_param param = {
- .resctrl_val = "cqm",
+ .resctrl_val = CMT_STR,
.ctrlgrp = "c1",
.mongrp = "m1",
.cpu_no = cpu_no,
@@ -154,7 +123,7 @@ int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
.mask = ~(long_mask << n) & long_mask,
.span = cache_size * n / count_of_bits,
.num_of_runs = 0,
- .setup = cqm_setup,
+ .setup = cmt_setup,
};
if (strcmp(benchmark_cmd[0], "fill_buf") == 0)
@@ -170,7 +139,7 @@ int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
if (ret)
return ret;
- cqm_test_cleanup();
+ cmt_test_cleanup();
return 0;
}
diff --git a/tools/testing/selftests/resctrl/config b/tools/testing/selftests/resctrl/config
new file mode 100644
index 000000000000..8d9f2deb56ed
--- /dev/null
+++ b/tools/testing/selftests/resctrl/config
@@ -0,0 +1,2 @@
+CONFIG_X86_CPU_RESCTRL=y
+CONFIG_PROC_CPU_RESCTRL=y
diff --git a/tools/testing/selftests/resctrl/fill_buf.c b/tools/testing/selftests/resctrl/fill_buf.c
index 79c611c99a3d..51e5cf22632f 100644
--- a/tools/testing/selftests/resctrl/fill_buf.c
+++ b/tools/testing/selftests/resctrl/fill_buf.c
@@ -115,7 +115,7 @@ static int fill_cache_read(unsigned char *start_ptr, unsigned char *end_ptr,
while (1) {
ret = fill_one_span_read(start_ptr, end_ptr);
- if (!strcmp(resctrl_val, "cat"))
+ if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)))
break;
}
@@ -134,7 +134,7 @@ static int fill_cache_write(unsigned char *start_ptr, unsigned char *end_ptr,
{
while (1) {
fill_one_span_write(start_ptr, end_ptr);
- if (!strcmp(resctrl_val, "cat"))
+ if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)))
break;
}
diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index 7bf8eaa6204b..1a1bdb6180cf 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -12,7 +12,7 @@
#define RESULT_FILE_NAME "result_mba"
#define NUM_OF_RUNS 5
-#define MAX_DIFF 300
+#define MAX_DIFF_PERCENT 5
#define ALLOCATION_MAX 100
#define ALLOCATION_MIN 10
#define ALLOCATION_STEP 10
@@ -56,13 +56,14 @@ static void show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc)
int allocation, runs;
bool failed = false;
- printf("# Results are displayed in (MB)\n");
+ ksft_print_msg("Results are displayed in (MB)\n");
/* Memory bandwidth from 100% down to 10% */
for (allocation = 0; allocation < ALLOCATION_MAX / ALLOCATION_STEP;
allocation++) {
unsigned long avg_bw_imc, avg_bw_resc;
unsigned long sum_bw_imc = 0, sum_bw_resc = 0;
- unsigned long avg_diff;
+ int avg_diff_per;
+ float avg_diff;
/*
* The first run is discarded due to inaccurate value from
@@ -76,23 +77,26 @@ static void show_mba_info(unsigned long *bw_imc, unsigned long *bw_resc)
avg_bw_imc = sum_bw_imc / (NUM_OF_RUNS - 1);
avg_bw_resc = sum_bw_resc / (NUM_OF_RUNS - 1);
- avg_diff = labs((long)(avg_bw_resc - avg_bw_imc));
-
- printf("%sok MBA schemata percentage %u smaller than %d %%\n",
- avg_diff > MAX_DIFF ? "not " : "",
- ALLOCATION_MAX - ALLOCATION_STEP * allocation,
- MAX_DIFF);
- tests_run++;
- printf("# avg_diff: %lu\n", avg_diff);
- printf("# avg_bw_imc: %lu\n", avg_bw_imc);
- printf("# avg_bw_resc: %lu\n", avg_bw_resc);
- if (avg_diff > MAX_DIFF)
+ avg_diff = (float)labs(avg_bw_resc - avg_bw_imc) / avg_bw_imc;
+ avg_diff_per = (int)(avg_diff * 100);
+
+ ksft_print_msg("%s Check MBA diff within %d%% for schemata %u\n",
+ avg_diff_per > MAX_DIFF_PERCENT ?
+ "Fail:" : "Pass:",
+ MAX_DIFF_PERCENT,
+ ALLOCATION_MAX - ALLOCATION_STEP * allocation);
+
+ ksft_print_msg("avg_diff_per: %d%%\n", avg_diff_per);
+ ksft_print_msg("avg_bw_imc: %lu\n", avg_bw_imc);
+ ksft_print_msg("avg_bw_resc: %lu\n", avg_bw_resc);
+ if (avg_diff_per > MAX_DIFF_PERCENT)
failed = true;
}
- printf("%sok schemata change using MBA%s\n", failed ? "not " : "",
- failed ? " # at least one test failed" : "");
- tests_run++;
+ ksft_print_msg("%s Check schemata change using MBA\n",
+ failed ? "Fail:" : "Pass:");
+ if (failed)
+ ksft_print_msg("At least one test failed\n");
}
static int check_results(void)
@@ -141,7 +145,7 @@ void mba_test_cleanup(void)
int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
{
struct resctrl_val_param param = {
- .resctrl_val = "mba",
+ .resctrl_val = MBA_STR,
.ctrlgrp = "c1",
.mongrp = "m1",
.cpu_no = cpu_no,
@@ -154,9 +158,6 @@ int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
remove(RESULT_FILE_NAME);
- if (!validate_resctrl_feature_request("mba"))
- return -1;
-
ret = resctrl_val(benchmark_cmd, &param);
if (ret)
return ret;
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index 4700f7453f81..8392e5c55ed0 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -11,16 +11,16 @@
#include "resctrl.h"
#define RESULT_FILE_NAME "result_mbm"
-#define MAX_DIFF 300
+#define MAX_DIFF_PERCENT 5
#define NUM_OF_RUNS 5
-static void
+static int
show_bw_info(unsigned long *bw_imc, unsigned long *bw_resc, int span)
{
unsigned long avg_bw_imc = 0, avg_bw_resc = 0;
unsigned long sum_bw_imc = 0, sum_bw_resc = 0;
- long avg_diff = 0;
- int runs;
+ int runs, ret, avg_diff_per;
+ float avg_diff = 0;
/*
* Discard the first value which is inaccurate due to monitoring setup
@@ -33,15 +33,18 @@ show_bw_info(unsigned long *bw_imc, unsigned long *bw_resc, int span)
avg_bw_imc = sum_bw_imc / 4;
avg_bw_resc = sum_bw_resc / 4;
- avg_diff = avg_bw_resc - avg_bw_imc;
-
- printf("%sok MBM: diff within %d%%\n",
- labs(avg_diff) > MAX_DIFF ? "not " : "", MAX_DIFF);
- tests_run++;
- printf("# avg_diff: %lu\n", labs(avg_diff));
- printf("# Span (MB): %d\n", span);
- printf("# avg_bw_imc: %lu\n", avg_bw_imc);
- printf("# avg_bw_resc: %lu\n", avg_bw_resc);
+ avg_diff = (float)labs(avg_bw_resc - avg_bw_imc) / avg_bw_imc;
+ avg_diff_per = (int)(avg_diff * 100);
+
+ ret = avg_diff_per > MAX_DIFF_PERCENT;
+ ksft_print_msg("%s Check MBM diff within %d%%\n",
+ ret ? "Fail:" : "Pass:", MAX_DIFF_PERCENT);
+ ksft_print_msg("avg_diff_per: %d%%\n", avg_diff_per);
+ ksft_print_msg("Span (MB): %d\n", span);
+ ksft_print_msg("avg_bw_imc: %lu\n", avg_bw_imc);
+ ksft_print_msg("avg_bw_resc: %lu\n", avg_bw_resc);
+
+ return ret;
}
static int check_results(int span)
@@ -49,10 +52,10 @@ static int check_results(int span)
unsigned long bw_imc[NUM_OF_RUNS], bw_resc[NUM_OF_RUNS];
char temp[1024], *token_array[8];
char output[] = RESULT_FILE_NAME;
- int runs;
+ int runs, ret;
FILE *fp;
- printf("# Checking for pass/fail\n");
+ ksft_print_msg("Checking for pass/fail\n");
fp = fopen(output, "r");
if (!fp) {
@@ -76,11 +79,11 @@ static int check_results(int span)
runs++;
}
- show_bw_info(bw_imc, bw_resc, span);
+ ret = show_bw_info(bw_imc, bw_resc, span);
fclose(fp);
- return 0;
+ return ret;
}
static int mbm_setup(int num, ...)
@@ -114,7 +117,7 @@ void mbm_test_cleanup(void)
int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd)
{
struct resctrl_val_param param = {
- .resctrl_val = "mbm",
+ .resctrl_val = MBM_STR,
.ctrlgrp = "c1",
.mongrp = "m1",
.span = span,
@@ -128,9 +131,6 @@ int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd)
remove(RESULT_FILE_NAME);
- if (!validate_resctrl_feature_request("mbm"))
- return -1;
-
ret = resctrl_val(benchmark_cmd, &param);
if (ret)
return ret;
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 39bf59c6b9c5..1ad10c47e31d 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -23,11 +23,16 @@
#include <sys/eventfd.h>
#include <asm/unistd.h>
#include <linux/perf_event.h>
+#include "../kselftest.h"
#define MB (1024 * 1024)
#define RESCTRL_PATH "/sys/fs/resctrl"
#define PHYS_ID_PATH "/sys/devices/system/cpu/cpu"
#define CBM_MASK_PATH "/sys/fs/resctrl/info"
+#define L3_PATH "/sys/fs/resctrl/info/L3"
+#define MB_PATH "/sys/fs/resctrl/info/MB"
+#define L3_MON_PATH "/sys/fs/resctrl/info/L3_MON"
+#define L3_MON_FEATURES_PATH "/sys/fs/resctrl/info/L3_MON/mon_features"
#define PARENT_EXIT(err_msg) \
do { \
@@ -62,11 +67,15 @@ struct resctrl_val_param {
int (*setup)(int num, ...);
};
-pid_t bm_pid, ppid;
-int tests_run;
+#define MBM_STR "mbm"
+#define MBA_STR "mba"
+#define CMT_STR "cmt"
+#define CAT_STR "cat"
-char llc_occup_path[1024];
-bool is_amd;
+extern pid_t bm_pid, ppid;
+
+extern char llc_occup_path[1024];
+extern bool is_amd;
bool check_resctrlfs_support(void);
int filter_dmesg(void);
@@ -74,7 +83,7 @@ int remount_resctrlfs(bool mum_resctrlfs);
int get_resource_id(int cpu_no, int *resource_id);
int umount_resctrlfs(void);
int validate_bw_report_request(char *bw_report);
-bool validate_resctrl_feature_request(char *resctrl_val);
+bool validate_resctrl_feature_request(const char *resctrl_val);
char *fgrep(FILE *inf, const char *str);
int taskset_benchmark(pid_t bm_pid, int cpu_no);
void run_benchmark(int signum, siginfo_t *info, void *ucontext);
@@ -92,16 +101,20 @@ void tests_cleanup(void);
void mbm_test_cleanup(void);
int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
void mba_test_cleanup(void);
-int get_cbm_mask(char *cache_type);
+int get_cbm_mask(char *cache_type, char *cbm_mask);
int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
int cat_val(struct resctrl_val_param *param);
void cat_test_cleanup(void);
int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
-int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
+int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
unsigned int count_bits(unsigned long n);
-void cqm_test_cleanup(void);
+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 */
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 425cc85ac883..f51b5fc066a3 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -37,10 +37,10 @@ void detect_amd(void)
static void cmd_help(void)
{
printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n");
- printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CQM");
- printf("\t default benchmark is builtin fill_buf\n");
+ printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT\n");
+ printf("\t default benchmark is builtin fill_buf\n");
printf("\t-t test list: run tests specified in the test list, ");
- printf("e.g. -t mbm, mba, cqm, cat\n");
+ printf("e.g. -t mbm, mba, cmt, cat\n");
printf("\t-n no_of_bits: run cache tests using specified no of bits in cache bit mask\n");
printf("\t-p cpu_no: specify CPU number to run the test. 1 is default\n");
printf("\t-h: help\n");
@@ -50,17 +50,88 @@ void tests_cleanup(void)
{
mbm_test_cleanup();
mba_test_cleanup();
- cqm_test_cleanup();
+ cmt_test_cleanup();
+ cat_test_cleanup();
+}
+
+static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
+ int cpu_no, char *bw_report)
+{
+ int res;
+
+ ksft_print_msg("Starting MBM BW change ...\n");
+
+ if (!validate_resctrl_feature_request(MBM_STR)) {
+ ksft_test_result_skip("Hardware does not support MBM or MBM is disabled\n");
+ return;
+ }
+
+ if (!has_ben)
+ sprintf(benchmark_cmd[5], "%s", MBA_STR);
+ res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
+ ksft_test_result(!res, "MBM: bw change\n");
+ mbm_test_cleanup();
+}
+
+static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
+ int cpu_no, char *bw_report)
+{
+ int res;
+
+ ksft_print_msg("Starting MBA Schemata change ...\n");
+
+ if (!validate_resctrl_feature_request(MBA_STR)) {
+ ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n");
+ return;
+ }
+
+ if (!has_ben)
+ sprintf(benchmark_cmd[1], "%d", span);
+ res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
+ ksft_test_result(!res, "MBA: schemata change\n");
+ mba_test_cleanup();
+}
+
+static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
+{
+ int res;
+
+ ksft_print_msg("Starting CMT test ...\n");
+ if (!validate_resctrl_feature_request(CMT_STR)) {
+ ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n");
+ return;
+ }
+
+ if (!has_ben)
+ sprintf(benchmark_cmd[5], "%s", CMT_STR);
+ res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
+ ksft_test_result(!res, "CMT: test\n");
+ cmt_test_cleanup();
+}
+
+static void run_cat_test(int cpu_no, int no_of_bits)
+{
+ int res;
+
+ ksft_print_msg("Starting CAT test ...\n");
+
+ if (!validate_resctrl_feature_request(CAT_STR)) {
+ ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n");
+ return;
+ }
+
+ res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
+ ksft_test_result(!res, "CAT: test\n");
cat_test_cleanup();
}
int main(int argc, char **argv)
{
- bool has_ben = false, mbm_test = true, mba_test = true, cqm_test = true;
- int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 5;
+ bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
+ int c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0;
char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
- int ben_ind, ben_count;
+ int ben_ind, ben_count, tests = 0;
bool cat_test = true;
for (i = 0; i < argc; i++) {
@@ -73,7 +144,7 @@ int main(int argc, char **argv)
}
}
- while ((c = getopt(argc_new, argv, "ht:b:")) != -1) {
+ while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) {
char *token;
switch (c) {
@@ -82,17 +153,21 @@ int main(int argc, char **argv)
mbm_test = false;
mba_test = false;
- cqm_test = false;
+ cmt_test = false;
cat_test = false;
while (token) {
- if (!strcmp(token, "mbm")) {
+ if (!strncmp(token, MBM_STR, sizeof(MBM_STR))) {
mbm_test = true;
- } else if (!strcmp(token, "mba")) {
+ tests++;
+ } else if (!strncmp(token, MBA_STR, sizeof(MBA_STR))) {
mba_test = true;
- } else if (!strcmp(token, "cqm")) {
- cqm_test = true;
- } else if (!strcmp(token, "cat")) {
+ tests++;
+ } else if (!strncmp(token, CMT_STR, sizeof(CMT_STR))) {
+ cmt_test = true;
+ tests++;
+ } else if (!strncmp(token, CAT_STR, sizeof(CAT_STR))) {
cat_test = true;
+ tests++;
} else {
printf("invalid argument\n");
@@ -106,6 +181,10 @@ int main(int argc, char **argv)
break;
case 'n':
no_of_bits = atoi(optarg);
+ if (no_of_bits <= 0) {
+ printf("Bail out! invalid argument for no_of_bits\n");
+ return -1;
+ }
break;
case 'h':
cmd_help();
@@ -118,7 +197,7 @@ int main(int argc, char **argv)
}
}
- printf("TAP version 13\n");
+ ksft_print_header();
/*
* Typically we need root privileges, because:
@@ -126,7 +205,7 @@ int main(int argc, char **argv)
* 2. We execute perf commands
*/
if (geteuid() != 0)
- printf("# WARNING: not running as root, tests may fail.\n");
+ return ksft_exit_fail_msg("Not running as root, abort testing.\n");
/* Detect AMD vendor */
detect_amd();
@@ -155,48 +234,26 @@ int main(int argc, char **argv)
sprintf(bw_report, "reads");
sprintf(bm_type, "fill_buf");
- check_resctrlfs_support();
+ if (!check_resctrlfs_support())
+ return ksft_exit_fail_msg("resctrl FS does not exist\n");
+
filter_dmesg();
- if (!is_amd && mbm_test) {
- printf("# Starting MBM BW change ...\n");
- if (!has_ben)
- sprintf(benchmark_cmd[5], "%s", "mba");
- res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
- printf("%sok MBM: bw change\n", res ? "not " : "");
- mbm_test_cleanup();
- tests_run++;
- }
+ ksft_set_plan(tests ? : 4);
- if (!is_amd && mba_test) {
- printf("# Starting MBA Schemata change ...\n");
- if (!has_ben)
- sprintf(benchmark_cmd[1], "%d", span);
- res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
- printf("%sok MBA: schemata change\n", res ? "not " : "");
- mba_test_cleanup();
- tests_run++;
- }
+ if (!is_amd && mbm_test)
+ run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
- if (cqm_test) {
- printf("# Starting CQM test ...\n");
- if (!has_ben)
- sprintf(benchmark_cmd[5], "%s", "cqm");
- res = cqm_resctrl_val(cpu_no, no_of_bits, benchmark_cmd);
- printf("%sok CQM: test\n", res ? "not " : "");
- cqm_test_cleanup();
- tests_run++;
- }
+ if (!is_amd && mba_test)
+ run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
- if (cat_test) {
- printf("# Starting CAT test ...\n");
- res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
- printf("%sok CAT: test\n", res ? "not " : "");
- tests_run++;
- cat_test_cleanup();
- }
+ if (cmt_test)
+ run_cmt_test(has_ben, benchmark_cmd, cpu_no);
+
+ if (cat_test)
+ run_cat_test(cpu_no, no_of_bits);
- printf("1..%d\n", tests_run);
+ umount_resctrlfs();
- return 0;
+ return ksft_exit_pass();
}
diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
index 520fea3606d1..95224345c78e 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -221,8 +221,8 @@ static int read_from_imc_dir(char *imc_dir, int count)
*/
static int num_of_imcs(void)
{
+ char imc_dir[512], *temp;
unsigned int count = 0;
- char imc_dir[512];
struct dirent *ep;
int ret;
DIR *dp;
@@ -230,7 +230,25 @@ static int num_of_imcs(void)
dp = opendir(DYN_PMU_PATH);
if (dp) {
while ((ep = readdir(dp))) {
- if (strstr(ep->d_name, UNCORE_IMC)) {
+ temp = strstr(ep->d_name, UNCORE_IMC);
+ if (!temp)
+ continue;
+
+ /*
+ * imc counters are named as "uncore_imc_<n>", hence
+ * increment the pointer to point to <n>. Note that
+ * sizeof(UNCORE_IMC) would count for null character as
+ * well and hence the last underscore character in
+ * uncore_imc'_' need not be counted.
+ */
+ temp = temp + sizeof(UNCORE_IMC);
+
+ /*
+ * Some directories under "DYN_PMU_PATH" could have
+ * names like "uncore_imc_free_running", hence, check if
+ * first character is a numerical digit or not.
+ */
+ if (temp[0] >= '0' && temp[0] <= '9') {
sprintf(imc_dir, "%s/%s/", DYN_PMU_PATH,
ep->d_name);
ret = read_from_imc_dir(imc_dir, count);
@@ -282,9 +300,9 @@ static int initialize_mem_bw_imc(void)
* Memory B/W utilized by a process on a socket can be calculated using
* iMC counters. Perf events are used to read these counters.
*
- * Return: >= 0 on success. < 0 on failure.
+ * Return: = 0 on success. < 0 on failure.
*/
-static float get_mem_bw_imc(int cpu_no, char *bw_report)
+static int get_mem_bw_imc(int cpu_no, char *bw_report, float *bw_imc)
{
float reads, writes, of_mul_read, of_mul_write;
int imc, j, ret;
@@ -355,13 +373,18 @@ static float get_mem_bw_imc(int cpu_no, char *bw_report)
close(imc_counters_config[imc][WRITE].fd);
}
- if (strcmp(bw_report, "reads") == 0)
- return reads;
+ if (strcmp(bw_report, "reads") == 0) {
+ *bw_imc = reads;
+ return 0;
+ }
- if (strcmp(bw_report, "writes") == 0)
- return writes;
+ if (strcmp(bw_report, "writes") == 0) {
+ *bw_imc = writes;
+ return 0;
+ }
- return (reads + writes);
+ *bw_imc = reads + writes;
+ return 0;
}
void set_mbm_path(const char *ctrlgrp, const char *mongrp, int resource_id)
@@ -397,10 +420,10 @@ static void initialize_mem_bw_resctrl(const char *ctrlgrp, const char *mongrp,
return;
}
- if (strcmp(resctrl_val, "mbm") == 0)
+ if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)))
set_mbm_path(ctrlgrp, mongrp, resource_id);
- if ((strcmp(resctrl_val, "mba") == 0)) {
+ if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
if (ctrlgrp)
sprintf(mbm_total_path, CON_MBM_LOCAL_BYTES_PATH,
RESCTRL_PATH, ctrlgrp, resource_id);
@@ -420,9 +443,8 @@ static void initialize_mem_bw_resctrl(const char *ctrlgrp, const char *mongrp,
* 1. If con_mon grp is given, then read from it
* 2. If con_mon grp is not given, then read from root con_mon grp
*/
-static unsigned long get_mem_bw_resctrl(void)
+static int get_mem_bw_resctrl(unsigned long *mbm_total)
{
- unsigned long mbm_total = 0;
FILE *fp;
fp = fopen(mbm_total_path, "r");
@@ -431,7 +453,7 @@ static unsigned long get_mem_bw_resctrl(void)
return -1;
}
- if (fscanf(fp, "%lu", &mbm_total) <= 0) {
+ if (fscanf(fp, "%lu", mbm_total) <= 0) {
perror("Could not get mbm local bytes");
fclose(fp);
@@ -439,7 +461,7 @@ static unsigned long get_mem_bw_resctrl(void)
}
fclose(fp);
- return mbm_total;
+ return 0;
}
pid_t bm_pid, ppid;
@@ -449,7 +471,7 @@ void ctrlc_handler(int signum, siginfo_t *info, void *ptr)
kill(bm_pid, SIGKILL);
umount_resctrlfs();
tests_cleanup();
- printf("Ending\n\n");
+ ksft_print_msg("Ending\n\n");
exit(EXIT_SUCCESS);
}
@@ -492,7 +514,7 @@ static int print_results_bw(char *filename, int bm_pid, float bw_imc,
return 0;
}
-static void set_cqm_path(const char *ctrlgrp, const char *mongrp, char sock_num)
+static void set_cmt_path(const char *ctrlgrp, const char *mongrp, char sock_num)
{
if (strlen(ctrlgrp) && strlen(mongrp))
sprintf(llc_occup_path, CON_MON_LCC_OCCUP_PATH, RESCTRL_PATH,
@@ -512,7 +534,7 @@ static void set_cqm_path(const char *ctrlgrp, const char *mongrp, char sock_num)
* @ctrlgrp: Name of the control monitor group (con_mon grp)
* @mongrp: Name of the monitor group (mon grp)
* @cpu_no: CPU number that the benchmark PID is binded to
- * @resctrl_val: Resctrl feature (Eg: cat, cqm.. etc)
+ * @resctrl_val: Resctrl feature (Eg: cat, cmt.. etc)
*/
static void initialize_llc_occu_resctrl(const char *ctrlgrp, const char *mongrp,
int cpu_no, char *resctrl_val)
@@ -524,14 +546,15 @@ static void initialize_llc_occu_resctrl(const char *ctrlgrp, const char *mongrp,
return;
}
- if (strcmp(resctrl_val, "cqm") == 0)
- set_cqm_path(ctrlgrp, mongrp, resource_id);
+ if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
+ set_cmt_path(ctrlgrp, mongrp, resource_id);
}
static int
measure_vals(struct resctrl_val_param *param, unsigned long *bw_resc_start)
{
- unsigned long bw_imc, bw_resc, bw_resc_end;
+ unsigned long bw_resc, bw_resc_end;
+ float bw_imc;
int ret;
/*
@@ -541,13 +564,13 @@ measure_vals(struct resctrl_val_param *param, unsigned long *bw_resc_start)
* Compare the two values to validate resctrl value.
* It takes 1sec to measure the data.
*/
- bw_imc = get_mem_bw_imc(param->cpu_no, param->bw_report);
- if (bw_imc <= 0)
- return bw_imc;
+ ret = get_mem_bw_imc(param->cpu_no, param->bw_report, &bw_imc);
+ if (ret < 0)
+ return ret;
- bw_resc_end = get_mem_bw_resctrl();
- if (bw_resc_end <= 0)
- return bw_resc_end;
+ ret = get_mem_bw_resctrl(&bw_resc_end);
+ if (ret < 0)
+ return ret;
bw_resc = (bw_resc_end - *bw_resc_start) / MB;
ret = print_results_bw(param->filename, bm_pid, bw_imc, bw_resc);
@@ -579,8 +602,8 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
if (strcmp(param->filename, "") == 0)
sprintf(param->filename, "stdio");
- if ((strcmp(resctrl_val, "mba")) == 0 ||
- (strcmp(resctrl_val, "mbm")) == 0) {
+ if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)) ||
+ !strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
ret = validate_bw_report_request(param->bw_report);
if (ret)
return ret;
@@ -645,7 +668,7 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
PARENT_EXIT("Child is done");
}
- printf("# benchmark PID: %d\n", bm_pid);
+ ksft_print_msg("Benchmark PID: %d\n", bm_pid);
/*
* Register CTRL-C handler for parent, as it has to kill benchmark
@@ -674,15 +697,15 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
if (ret)
goto out;
- if ((strcmp(resctrl_val, "mbm") == 0) ||
- (strcmp(resctrl_val, "mba") == 0)) {
+ if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
+ !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
ret = initialize_mem_bw_imc();
if (ret)
goto out;
initialize_mem_bw_resctrl(param->ctrlgrp, param->mongrp,
param->cpu_no, resctrl_val);
- } else if (strcmp(resctrl_val, "cqm") == 0)
+ } else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
initialize_llc_occu_resctrl(param->ctrlgrp, param->mongrp,
param->cpu_no, resctrl_val);
@@ -710,8 +733,8 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
/* Test runs until the callback setup() tells the test to stop. */
while (1) {
- if ((strcmp(resctrl_val, "mbm") == 0) ||
- (strcmp(resctrl_val, "mba") == 0)) {
+ if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
+ !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
ret = param->setup(1, param);
if (ret) {
ret = 0;
@@ -721,7 +744,7 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
ret = measure_vals(param, &bw_resc_start);
if (ret)
break;
- } else if (strcmp(resctrl_val, "cqm") == 0) {
+ } else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
ret = param->setup(1, param);
if (ret) {
ret = 0;
diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c
index 19c0ec4045a4..5f5a166ade60 100644
--- a/tools/testing/selftests/resctrl/resctrlfs.c
+++ b/tools/testing/selftests/resctrl/resctrlfs.c
@@ -10,8 +10,6 @@
*/
#include "resctrl.h"
-int tests_run;
-
static int find_resctrl_mount(char *buffer)
{
FILE *mounts;
@@ -49,8 +47,6 @@ static int find_resctrl_mount(char *buffer)
return -ENOENT;
}
-char cbm_mask[256];
-
/*
* remount_resctrlfs - Remount resctrl FS at /sys/fs/resctrl
* @mum_resctrlfs: Should the resctrl FS be remounted?
@@ -70,28 +66,25 @@ int remount_resctrlfs(bool mum_resctrlfs)
if (ret)
strcpy(mountpoint, RESCTRL_PATH);
- if (!ret && mum_resctrlfs && umount(mountpoint)) {
- printf("not ok unmounting \"%s\"\n", mountpoint);
- perror("# umount");
- tests_run++;
- }
+ if (!ret && mum_resctrlfs && umount(mountpoint))
+ ksft_print_msg("Fail: unmounting \"%s\"\n", mountpoint);
if (!ret && !mum_resctrlfs)
return 0;
+ ksft_print_msg("Mounting resctrl to \"%s\"\n", RESCTRL_PATH);
ret = mount("resctrl", RESCTRL_PATH, "resctrl", 0, NULL);
- printf("%sok mounting resctrl to \"%s\"\n", ret ? "not " : "",
- RESCTRL_PATH);
if (ret)
perror("# mount");
- tests_run++;
-
return ret;
}
int umount_resctrlfs(void)
{
+ if (find_resctrl_mount(NULL))
+ return 0;
+
if (umount(RESCTRL_PATH)) {
perror("# Unable to umount resctrl");
@@ -205,16 +198,18 @@ int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size)
/*
* get_cbm_mask - Get cbm mask for given cache
* @cache_type: Cache level L2/L3
- *
- * Mask is stored in cbm_mask which is global variable.
+ * @cbm_mask: cbm_mask returned as a string
*
* Return: = 0 on success, < 0 on failure.
*/
-int get_cbm_mask(char *cache_type)
+int get_cbm_mask(char *cache_type, char *cbm_mask)
{
char cbm_mask_path[1024];
FILE *fp;
+ if (!cbm_mask)
+ return -1;
+
sprintf(cbm_mask_path, "%s/%s/cbm_mask", CBM_MASK_PATH, cache_type);
fp = fopen(cbm_mask_path, "r");
@@ -268,7 +263,7 @@ int get_core_sibling(int cpu_no)
while (token) {
sibling_cpu_no = atoi(token);
/* Skipping core 0 as we don't want to run test on core 0 */
- if (sibling_cpu_no != 0)
+ if (sibling_cpu_no != 0 && sibling_cpu_no != cpu_no)
break;
token = strtok(NULL, "-,");
}
@@ -334,7 +329,7 @@ void run_benchmark(int signum, siginfo_t *info, void *ucontext)
operation = atoi(benchmark_cmd[4]);
sprintf(resctrl_val, "%s", benchmark_cmd[5]);
- if (strcmp(resctrl_val, "cqm") != 0)
+ if (strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
buffer_span = span * MB;
else
buffer_span = span;
@@ -458,9 +453,9 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
if (ret)
goto out;
- /* Create mon grp and write pid into it for "mbm" and "cqm" test */
- if ((strcmp(resctrl_val, "cqm") == 0) ||
- (strcmp(resctrl_val, "mbm") == 0)) {
+ /* Create mon grp and write pid into it for "mbm" and "cmt" test */
+ if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)) ||
+ !strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
if (strlen(mongrp)) {
sprintf(monitorgroup_p, "%s/mon_groups", controlgroup);
sprintf(monitorgroup, "%s/%s", monitorgroup_p, mongrp);
@@ -477,13 +472,10 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
}
out:
- printf("%sok writing benchmark parameters to resctrl FS\n",
- ret ? "not " : "");
+ ksft_print_msg("Writing benchmark parameters to resctrl FS\n");
if (ret)
perror("# writing to resctrlfs");
- tests_run++;
-
return ret;
}
@@ -505,13 +497,13 @@ int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, char *resctrl_val)
int resource_id, ret = 0;
FILE *fp;
- if ((strcmp(resctrl_val, "mba") != 0) &&
- (strcmp(resctrl_val, "cat") != 0) &&
- (strcmp(resctrl_val, "cqm") != 0))
+ if (strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)) &&
+ strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) &&
+ strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
return -ENOENT;
if (!schemata) {
- printf("# Skipping empty schemata update\n");
+ ksft_print_msg("Skipping empty schemata update\n");
return -1;
}
@@ -528,9 +520,10 @@ int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, char *resctrl_val)
else
sprintf(controlgroup, "%s/schemata", RESCTRL_PATH);
- if (!strcmp(resctrl_val, "cat") || !strcmp(resctrl_val, "cqm"))
+ if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) ||
+ !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
sprintf(schema, "%s%d%c%s", "L3:", resource_id, '=', schemata);
- if (strcmp(resctrl_val, "mba") == 0)
+ if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)))
sprintf(schema, "%s%d%c%s", "MB:", resource_id, '=', schemata);
fp = fopen(controlgroup, "w");
@@ -551,10 +544,9 @@ int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, char *resctrl_val)
fclose(fp);
out:
- printf("%sok Write schema \"%s\" to resctrl FS%s%s\n",
- ret ? "not " : "", schema, ret ? " # " : "",
- ret ? reason : "");
- tests_run++;
+ ksft_print_msg("Write schema \"%s\" to resctrl FS%s%s\n",
+ schema, ret ? " # " : "",
+ ret ? reason : "");
return ret;
}
@@ -578,18 +570,20 @@ bool check_resctrlfs_support(void)
fclose(inf);
- printf("%sok kernel supports resctrl filesystem\n", ret ? "" : "not ");
- tests_run++;
+ ksft_print_msg("%s Check kernel supports resctrl filesystem\n",
+ ret ? "Pass:" : "Fail:");
+
+ if (!ret)
+ return ret;
dp = opendir(RESCTRL_PATH);
- printf("%sok resctrl mountpoint \"%s\" exists\n",
- dp ? "" : "not ", RESCTRL_PATH);
+ ksft_print_msg("%s Check resctrl mountpoint \"%s\" exists\n",
+ dp ? "Pass:" : "Fail:", RESCTRL_PATH);
if (dp)
closedir(dp);
- tests_run++;
- printf("# resctrl filesystem %s mounted\n",
- find_resctrl_mount(NULL) ? "not" : "is");
+ ksft_print_msg("resctrl filesystem %s mounted\n",
+ find_resctrl_mount(NULL) ? "not" : "is");
return ret;
}
@@ -615,26 +609,56 @@ char *fgrep(FILE *inf, const char *str)
* validate_resctrl_feature_request - Check if requested feature is valid.
* @resctrl_val: Requested feature
*
- * Return: 0 on success, non-zero on failure
+ * Return: True if the feature is supported, else false
*/
-bool validate_resctrl_feature_request(char *resctrl_val)
+bool validate_resctrl_feature_request(const char *resctrl_val)
{
- FILE *inf = fopen("/proc/cpuinfo", "r");
+ struct stat statbuf;
bool found = false;
char *res;
+ FILE *inf;
- if (!inf)
+ if (!resctrl_val)
return false;
- res = fgrep(inf, "flags");
-
- if (res) {
- char *s = strchr(res, ':');
+ if (remount_resctrlfs(false))
+ return false;
- found = s && !strstr(s, resctrl_val);
- free(res);
+ if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) {
+ if (!stat(L3_PATH, &statbuf))
+ return true;
+ } else if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
+ if (!stat(MB_PATH, &statbuf))
+ return true;
+ } else if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
+ !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
+ if (!stat(L3_MON_PATH, &statbuf)) {
+ inf = fopen(L3_MON_FEATURES_PATH, "r");
+ if (!inf)
+ return false;
+
+ if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
+ res = fgrep(inf, "llc_occupancy");
+ if (res) {
+ found = true;
+ free(res);
+ }
+ }
+
+ if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
+ res = fgrep(inf, "mbm_total_bytes");
+ if (res) {
+ free(res);
+ res = fgrep(inf, "mbm_local_bytes");
+ if (res) {
+ found = true;
+ free(res);
+ }
+ }
+ }
+ fclose(inf);
+ }
}
- fclose(inf);
return found;
}
@@ -671,9 +695,9 @@ int filter_dmesg(void)
while (fgets(line, 1024, fp)) {
if (strstr(line, "intel_rdt:"))
- printf("# dmesg: %s", line);
+ ksft_print_msg("dmesg: %s", line);
if (strstr(line, "resctrl:"))
- printf("# dmesg: %s", line);
+ ksft_print_msg("dmesg: %s", line);
}
fclose(fp);
waitpid(pid, NULL, 0);