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176 lines
3.7 KiB
176 lines
3.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Cache Monitoring Technology (CQM) test |
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* |
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* Copyright (C) 2018 Intel Corporation |
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* |
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* Authors: |
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* Sai Praneeth Prakhya <[email protected]>, |
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* Fenghua Yu <[email protected]> |
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*/ |
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#include "resctrl.h" |
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#include <unistd.h> |
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#define RESULT_FILE_NAME "result_cqm" |
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#define NUM_OF_RUNS 5 |
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#define MAX_DIFF 2000000 |
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#define MAX_DIFF_PERCENT 15 |
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static int count_of_bits; |
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static char cbm_mask[256]; |
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static unsigned long long_mask; |
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static unsigned long cache_size; |
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static int cqm_setup(int num, ...) |
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{ |
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struct resctrl_val_param *p; |
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va_list param; |
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va_start(param, num); |
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p = va_arg(param, struct resctrl_val_param *); |
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va_end(param); |
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/* Run NUM_OF_RUNS times */ |
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if (p->num_of_runs >= NUM_OF_RUNS) |
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return -1; |
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p->num_of_runs++; |
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return 0; |
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} |
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static void show_cache_info(unsigned long sum_llc_occu_resc, int no_of_bits, |
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unsigned long span) |
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{ |
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unsigned long avg_llc_occu_resc = 0; |
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float diff_percent; |
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long avg_diff = 0; |
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bool res; |
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avg_llc_occu_resc = sum_llc_occu_resc / (NUM_OF_RUNS - 1); |
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avg_diff = (long)abs(span - avg_llc_occu_resc); |
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diff_percent = (((float)span - avg_llc_occu_resc) / span) * 100; |
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if ((abs((int)diff_percent) <= MAX_DIFF_PERCENT) || |
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(abs(avg_diff) <= MAX_DIFF)) |
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res = true; |
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else |
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res = false; |
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printf("%sok CQM: diff within %d, %d\%%\n", res ? "" : "not", |
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MAX_DIFF, (int)MAX_DIFF_PERCENT); |
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printf("# diff: %ld\n", avg_diff); |
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printf("# percent diff=%d\n", abs((int)diff_percent)); |
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printf("# Results are displayed in (Bytes)\n"); |
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printf("# Number of bits: %d\n", no_of_bits); |
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printf("# Avg_llc_occu_resc: %lu\n", avg_llc_occu_resc); |
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printf("# llc_occu_exp (span): %lu\n", span); |
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tests_run++; |
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} |
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static int check_results(struct resctrl_val_param *param, int no_of_bits) |
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{ |
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char *token_array[8], temp[512]; |
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unsigned long sum_llc_occu_resc = 0; |
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int runs = 0; |
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FILE *fp; |
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printf("# checking for pass/fail\n"); |
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fp = fopen(param->filename, "r"); |
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if (!fp) { |
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perror("# Error in opening file\n"); |
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return errno; |
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} |
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while (fgets(temp, sizeof(temp), fp)) { |
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char *token = strtok(temp, ":\t"); |
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int fields = 0; |
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while (token) { |
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token_array[fields++] = token; |
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token = strtok(NULL, ":\t"); |
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} |
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/* Field 3 is llc occ resc value */ |
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if (runs > 0) |
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sum_llc_occu_resc += strtoul(token_array[3], NULL, 0); |
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runs++; |
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} |
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fclose(fp); |
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show_cache_info(sum_llc_occu_resc, no_of_bits, param->span); |
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return 0; |
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} |
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void cqm_test_cleanup(void) |
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{ |
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remove(RESULT_FILE_NAME); |
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} |
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int cqm_resctrl_val(int cpu_no, int n, char **benchmark_cmd) |
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{ |
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int ret, mum_resctrlfs; |
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cache_size = 0; |
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mum_resctrlfs = 1; |
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ret = remount_resctrlfs(mum_resctrlfs); |
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if (ret) |
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return ret; |
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if (!validate_resctrl_feature_request("cqm")) |
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return -1; |
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ret = get_cbm_mask("L3", cbm_mask); |
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if (ret) |
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return ret; |
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long_mask = strtoul(cbm_mask, NULL, 16); |
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ret = get_cache_size(cpu_no, "L3", &cache_size); |
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if (ret) |
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return ret; |
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printf("cache size :%lu\n", cache_size); |
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count_of_bits = count_bits(long_mask); |
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if (n < 1 || n > count_of_bits) { |
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printf("Invalid input value for numbr_of_bits n!\n"); |
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printf("Please Enter value in range 1 to %d\n", count_of_bits); |
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return -1; |
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} |
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struct resctrl_val_param param = { |
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.resctrl_val = CQM_STR, |
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.ctrlgrp = "c1", |
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.mongrp = "m1", |
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.cpu_no = cpu_no, |
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.mum_resctrlfs = 0, |
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.filename = RESULT_FILE_NAME, |
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.mask = ~(long_mask << n) & long_mask, |
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.span = cache_size * n / count_of_bits, |
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.num_of_runs = 0, |
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.setup = cqm_setup, |
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}; |
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if (strcmp(benchmark_cmd[0], "fill_buf") == 0) |
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sprintf(benchmark_cmd[1], "%lu", param.span); |
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remove(RESULT_FILE_NAME); |
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ret = resctrl_val(benchmark_cmd, ¶m); |
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if (ret) |
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return ret; |
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ret = check_results(¶m, n); |
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if (ret) |
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return ret; |
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cqm_test_cleanup(); |
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return 0; |
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}
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