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Message-ID: <679251da-b701-7a75-bea3-ebe564bc6319@amd.com>
Date: Fri, 12 Mar 2021 13:10:22 -0600
From: Babu Moger <babu.moger@....com>
To: Fenghua Yu <fenghua.yu@...el.com>, Shuah Khan <shuah@...nel.org>,
Tony Luck <tony.luck@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>
Cc: linux-kselftest <linux-kselftest@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v5 07/21] selftests/resctrl: Rename CQM test as CMT test
> -----Original Message-----
> From: Fenghua Yu <fenghua.yu@...el.com>
> Sent: Sunday, March 7, 2021 8:55 AM
> To: Shuah Khan <shuah@...nel.org>; Tony Luck <tony.luck@...el.com>;
> Reinette Chatre <reinette.chatre@...el.com>; Moger, Babu
> <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 07/21] selftests/resctrl: Rename CQM test as CMT test
>
> CMT (Cache Monitoring Technology) [1] is a H/W feature that reports cache
> occupancy of a process. resctrl selftest suite has a unit test to test CMT
> for LLC but the test is named as CQM (Cache Quality Monitoring).
> Furthermore, the unit test source file is named as cqm_test.c and several
> functions, variables, comments, preprocessors and statements widely use
> "cqm" as either suffix or prefix. This rampant misusage of CQM for CMT
> might confuse someone who is newly looking at resctrl selftests because
> this feature is named CMT in the Intel Software Developer's Manual.
>
> Hence, rename all the occurrences (unit test source file name, functions,
> variables, comments and preprocessors) of cqm with cmt.
>
> [1] Please see Intel SDM, Volume 3, chapter 17 and section 18 for more
> information on CMT:
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsoftwar
> e.intel.com%2Fcontent%2Fwww%2Fus%2Fen%2Fdevelop%2Farticles%2Fintel-
> sdm.html&data=04%7C01%7Cbabu.moger%40amd.com%7C15bb0710f06a
> 4a413ee008d8e1790293%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0
> %7C637507257137108219%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw
> MDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata
> =f19HKVi8hIoN4CbNYheS4bV136HCbE3INJEum4wDJqo%3D&reserved=0
>
> Suggested-by: Reinette Chatre <reinette.chatre@...el.com>
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> ---
> tools/testing/selftests/resctrl/README | 4 +--
> tools/testing/selftests/resctrl/cache.c | 4 +--
> .../resctrl/{cqm_test.c => cmt_test.c} | 20 +++++++-------
> tools/testing/selftests/resctrl/resctrl.h | 6 ++---
> .../testing/selftests/resctrl/resctrl_tests.c | 26 +++++++++----------
> tools/testing/selftests/resctrl/resctrl_val.c | 12 ++++-----
> tools/testing/selftests/resctrl/resctrlfs.c | 10 +++----
> 7 files changed, 41 insertions(+), 41 deletions(-)
> rename tools/testing/selftests/resctrl/{cqm_test.c => cmt_test.c} (89%)
>
> 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 5922cc1b0386..2aa1b5c7d9e1 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
> @@ -192,7 +192,7 @@ int measure_cache_vals(struct resctrl_val_param
> *param, int bm_pid)
> /*
> * Measure llc occupancy from resctrl.
> */
> - if (!strncmp(param->resctrl_val, CQM_STR, sizeof(CQM_STR))) {
> + if (!strncmp(param->resctrl_val, CMT_STR, sizeof(CMT_STR))) {
> ret = get_llc_occu_resctrl(&llc_occu_resc);
> if (ret < 0)
> return ret;
> diff --git a/tools/testing/selftests/resctrl/cqm_test.c
> b/tools/testing/selftests/resctrl/cmt_test.c
> similarity index 89%
> rename from tools/testing/selftests/resctrl/cqm_test.c
> rename to tools/testing/selftests/resctrl/cmt_test.c
> index 271752e9ef5b..ca82db37c1f7 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
> *
> @@ -11,7 +11,7 @@
> #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
> @@ -21,7 +21,7 @@ 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;
> @@ -58,7 +58,7 @@ static void show_cache_info(unsigned long
> sum_llc_occu_resc, int no_of_bits,
> else
> res = false;
>
> - printf("%sok CQM: diff within %d, %d\%%\n", res ? "" : "not",
> + printf("%sok CMT: diff within %d, %d\%%\n", res ? "" : "not",
> MAX_DIFF, (int)MAX_DIFF_PERCENT);
>
> printf("# diff: %ld\n", avg_diff);
> @@ -106,12 +106,12 @@ static int check_results(struct resctrl_val_param
> *param, int no_of_bits)
> return 0;
> }
>
> -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;
>
> @@ -122,7 +122,7 @@ 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"))
> return -1;
>
> ret = get_cbm_mask("L3", cbm_mask);
> @@ -145,7 +145,7 @@ int cqm_resctrl_val(int cpu_no, int n, char
> **benchmark_cmd)
> }
>
> struct resctrl_val_param param = {
> - .resctrl_val = CQM_STR,
> + .resctrl_val = CMT_STR,
> .ctrlgrp = "c1",
> .mongrp = "m1",
> .cpu_no = cpu_no,
> @@ -154,7 +154,7 @@ 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 +170,7 @@ 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/resctrl.h
> b/tools/testing/selftests/resctrl/resctrl.h
> index 36da6136af96..1a58767a0bd2 100644
> --- a/tools/testing/selftests/resctrl/resctrl.h
> +++ b/tools/testing/selftests/resctrl/resctrl.h
> @@ -64,7 +64,7 @@ struct resctrl_val_param {
>
> #define MBM_STR "mbm"
> #define MBA_STR "mba"
> -#define CQM_STR "cqm"
> +#define CMT_STR "cmt"
> #define CAT_STR "cat"
>
> extern pid_t bm_pid, ppid;
> @@ -103,9 +103,9 @@ 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);
>
> diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c
> b/tools/testing/selftests/resctrl/resctrl_tests.c
> index ac2269610aa9..01f7aed7f54e 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-b benchmark_cmd [options]: run specified benchmark for
> MBM, MBA and CMT");
> 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");
> @@ -50,13 +50,13 @@ void tests_cleanup(void)
> {
> mbm_test_cleanup();
> mba_test_cleanup();
> - cqm_test_cleanup();
> + cmt_test_cleanup();
> cat_test_cleanup();
> }
>
> int main(int argc, char **argv)
> {
> - bool has_ben = false, mbm_test = true, mba_test = true, cqm_test =
> true;
> + bool has_ben = false, mbm_test = true, mba_test = true, cmt_test =
> true;
> int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 5;
> char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64],
> bm_type[64];
> char
> benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
> @@ -82,15 +82,15 @@ int main(int argc, char **argv)
>
> mbm_test = false;
> mba_test = false;
> - cqm_test = false;
> + cmt_test = false;
> cat_test = false;
> while (token) {
> if (!strncmp(token, MBM_STR,
> sizeof(MBM_STR))) {
> mbm_test = true;
> } else if (!strncmp(token, MBA_STR,
> sizeof(MBA_STR))) {
> mba_test = true;
> - } else if (!strncmp(token, CQM_STR,
> sizeof(CQM_STR))) {
> - cqm_test = true;
> + } else if (!strncmp(token, CMT_STR,
> sizeof(CMT_STR))) {
> + cmt_test = true;
> } else if (!strncmp(token, CAT_STR,
> sizeof(CAT_STR))) {
> cat_test = true;
> } else {
> @@ -178,13 +178,13 @@ int main(int argc, char **argv)
> tests_run++;
> }
>
> - if (cqm_test) {
> - printf("# Starting CQM test ...\n");
> + if (cmt_test) {
> + printf("# Starting CMT test ...\n");
> if (!has_ben)
> - sprintf(benchmark_cmd[5], "%s", CQM_STR);
> - res = cqm_resctrl_val(cpu_no, no_of_bits, benchmark_cmd);
> - printf("%sok CQM: test\n", res ? "not " : "");
> - cqm_test_cleanup();
> + sprintf(benchmark_cmd[5], "%s", "cmt");
Shouldn't this be sprintf(benchmark_cmd[5], "%s", CMT_STR); ?
> + res = cmt_resctrl_val(cpu_no, no_of_bits, benchmark_cmd);
> + printf("%sok CMT: test\n", res ? "not " : "");
> + cmt_test_cleanup();
> tests_run++;
> }
>
> diff --git a/tools/testing/selftests/resctrl/resctrl_val.c
> b/tools/testing/selftests/resctrl/resctrl_val.c
> index aed71fd0713b..17770095c98e 100644
> --- a/tools/testing/selftests/resctrl/resctrl_val.c
> +++ b/tools/testing/selftests/resctrl/resctrl_val.c
> @@ -492,7 +492,7 @@ 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 +512,7 @@ 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)
> @@ -524,8 +524,8 @@ static void initialize_llc_occu_resctrl(const char *ctrlgrp,
> const char *mongrp,
> return;
> }
>
> - if (!strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
> - 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
> @@ -682,7 +682,7 @@ int resctrl_val(char **benchmark_cmd, struct
> resctrl_val_param *param)
>
> initialize_mem_bw_resctrl(param->ctrlgrp, param->mongrp,
> param->cpu_no, resctrl_val);
> - } else if (!strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
> + } else if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
> initialize_llc_occu_resctrl(param->ctrlgrp, param->mongrp,
> param->cpu_no, resctrl_val);
>
> @@ -721,7 +721,7 @@ int resctrl_val(char **benchmark_cmd, struct
> resctrl_val_param *param)
> ret = measure_vals(param, &bw_resc_start);
> if (ret)
> break;
> - } else if (!strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR))) {
> + } 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 bc52076bee7f..b47f4f150189 100644
> --- a/tools/testing/selftests/resctrl/resctrlfs.c
> +++ b/tools/testing/selftests/resctrl/resctrlfs.c
> @@ -334,7 +334,7 @@ void run_benchmark(int signum, siginfo_t *info, void
> *ucontext)
> operation = atoi(benchmark_cmd[4]);
> sprintf(resctrl_val, "%s", benchmark_cmd[5]);
>
> - if (strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
> + if (strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
> buffer_span = span * MB;
> else
> buffer_span = span;
> @@ -458,8 +458,8 @@ 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 (!strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)) ||
> + /* 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);
> @@ -507,7 +507,7 @@ int write_schemata(char *ctrlgrp, char *schemata, int
> cpu_no, char *resctrl_val)
>
> if (strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)) &&
> strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) &&
> - strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
> + strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
> return -ENOENT;
>
> if (!schemata) {
> @@ -529,7 +529,7 @@ int write_schemata(char *ctrlgrp, char *schemata, int
> cpu_no, char *resctrl_val)
> sprintf(controlgroup, "%s/schemata", RESCTRL_PATH);
>
> if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) ||
> - !strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
> + !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
> sprintf(schema, "%s%d%c%s", "L3:", resource_id, '=',
> schemata);
> if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)))
> sprintf(schema, "%s%d%c%s", "MB:", resource_id, '=',
> schemata);
> --
> 2.30.1
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