146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Memory Bandwidth Monitoring (MBM) test
|
|
*
|
|
* Copyright (C) 2018 Intel Corporation
|
|
*
|
|
* Authors:
|
|
* Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
|
|
* Fenghua Yu <fenghua.yu@intel.com>
|
|
*/
|
|
#include "resctrl.h"
|
|
|
|
#define RESULT_FILE_NAME "result_mbm"
|
|
#define MAX_DIFF_PERCENT 5
|
|
#define NUM_OF_RUNS 5
|
|
|
|
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;
|
|
int runs, ret, avg_diff_per;
|
|
float avg_diff = 0;
|
|
|
|
/*
|
|
* Discard the first value which is inaccurate due to monitoring setup
|
|
* transition phase.
|
|
*/
|
|
for (runs = 1; runs < NUM_OF_RUNS ; runs++) {
|
|
sum_bw_imc += bw_imc[runs];
|
|
sum_bw_resc += bw_resc[runs];
|
|
}
|
|
|
|
avg_bw_imc = sum_bw_imc / 4;
|
|
avg_bw_resc = sum_bw_resc / 4;
|
|
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)
|
|
{
|
|
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, ret;
|
|
FILE *fp;
|
|
|
|
ksft_print_msg("Checking for pass/fail\n");
|
|
|
|
fp = fopen(output, "r");
|
|
if (!fp) {
|
|
perror(output);
|
|
|
|
return errno;
|
|
}
|
|
|
|
runs = 0;
|
|
while (fgets(temp, sizeof(temp), fp)) {
|
|
char *token = strtok(temp, ":\t");
|
|
int i = 0;
|
|
|
|
while (token) {
|
|
token_array[i++] = token;
|
|
token = strtok(NULL, ":\t");
|
|
}
|
|
|
|
bw_resc[runs] = strtoul(token_array[5], NULL, 0);
|
|
bw_imc[runs] = strtoul(token_array[3], NULL, 0);
|
|
runs++;
|
|
}
|
|
|
|
ret = show_bw_info(bw_imc, bw_resc, span);
|
|
|
|
fclose(fp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mbm_setup(int num, ...)
|
|
{
|
|
struct resctrl_val_param *p;
|
|
va_list param;
|
|
int ret = 0;
|
|
|
|
va_start(param, num);
|
|
p = va_arg(param, struct resctrl_val_param *);
|
|
va_end(param);
|
|
|
|
/* Run NUM_OF_RUNS times */
|
|
if (p->num_of_runs >= NUM_OF_RUNS)
|
|
return END_OF_TESTS;
|
|
|
|
/* Set up shemata with 100% allocation on the first run. */
|
|
if (p->num_of_runs == 0)
|
|
ret = write_schemata(p->ctrlgrp, "100", p->cpu_no,
|
|
p->resctrl_val);
|
|
|
|
p->num_of_runs++;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void mbm_test_cleanup(void)
|
|
{
|
|
remove(RESULT_FILE_NAME);
|
|
}
|
|
|
|
int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd)
|
|
{
|
|
struct resctrl_val_param param = {
|
|
.resctrl_val = MBM_STR,
|
|
.ctrlgrp = "c1",
|
|
.mongrp = "m1",
|
|
.span = span,
|
|
.cpu_no = cpu_no,
|
|
.mum_resctrlfs = true,
|
|
.filename = RESULT_FILE_NAME,
|
|
.bw_report = bw_report,
|
|
.setup = mbm_setup
|
|
};
|
|
int ret;
|
|
|
|
remove(RESULT_FILE_NAME);
|
|
|
|
ret = resctrl_val(benchmark_cmd, ¶m);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = check_results(span);
|
|
|
|
out:
|
|
mbm_test_cleanup();
|
|
|
|
return ret;
|
|
}
|