142 lines
2.9 KiB
C
142 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Cache Monitoring Technology (CMT) 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 <sai.praneeth.prakhya@intel.com>,
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* Fenghua Yu <fenghua.yu@intel.com>
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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_cmt"
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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 cmt_setup(struct resctrl_val_param *p)
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{
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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 END_OF_TESTS;
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p->num_of_runs++;
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return 0;
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}
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static int check_results(struct resctrl_val_param *param, size_t span, 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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ksft_print_msg("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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return show_cache_info(sum_llc_occu_resc, no_of_bits, span,
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MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
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true, true);
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}
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void cmt_test_cleanup(void)
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{
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remove(RESULT_FILE_NAME);
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}
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int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd)
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{
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const char * const *cmd = benchmark_cmd;
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const char *new_cmd[BENCHMARK_ARGS];
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unsigned long cache_size = 0;
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unsigned long long_mask;
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char *span_str = NULL;
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char cbm_mask[256];
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int count_of_bits;
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size_t span;
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int ret, i;
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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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ksft_print_msg("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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ksft_print_msg("Invalid input value for numbr_of_bits n!\n");
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ksft_print_msg("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 = CMT_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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.filename = RESULT_FILE_NAME,
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.mask = ~(long_mask << n) & long_mask,
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.num_of_runs = 0,
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.setup = cmt_setup,
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};
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span = cache_size * n / count_of_bits;
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if (strcmp(cmd[0], "fill_buf") == 0) {
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/* Duplicate the command to be able to replace span in it */
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for (i = 0; benchmark_cmd[i]; i++)
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new_cmd[i] = benchmark_cmd[i];
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new_cmd[i] = NULL;
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ret = asprintf(&span_str, "%zu", span);
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if (ret < 0)
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return -1;
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new_cmd[1] = span_str;
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cmd = new_cmd;
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}
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remove(RESULT_FILE_NAME);
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ret = resctrl_val(cmd, ¶m);
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if (ret)
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goto out;
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ret = check_results(¶m, span, n);
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out:
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cmt_test_cleanup();
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free(span_str);
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return ret;
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}
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