115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/****************************************************************************
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* apps/testing/cpuload/cpuload_main.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/arch.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define CPULOAD_US (USEC_PER_SEC / CONFIG_SCHED_CPULOAD_TICKSPERSEC)
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#define CPULOAD_DELAY (10 * CPULOAD_US)
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void show_usage(FAR const char *progname, int exitcode)
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{
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optind = 0;
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printf("\nUsage: %s [-c cpu] -p percent\n", progname);
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printf("\nWhere:\n");
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printf(" -c bind to specific CPU, don't bind CPU if no this option\n");
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printf(" -p process percent[1-100], exectime / (exectime + idletime)\n");
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exit(exitcode);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* cpuload_main
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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FAR char *endptr;
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int option;
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int cpu = -1;
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int per = 50;
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while ((option = getopt(argc, argv, "c:p:")) != ERROR)
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{
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if (option == 'c')
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{
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cpu = strtol(optarg, &endptr, 10);
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}
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else if (option == 'p')
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{
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per = strtol(optarg, &endptr, 10);
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}
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else
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{
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printf("Unrecognized option: '%c'\n", option);
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show_usage(argv[0], EXIT_FAILURE);
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}
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}
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/* There should be two parameters remaining on the command line */
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if (per < 1 || per > 100 || optind > argc)
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{
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printf("Missing required arguments\n");
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show_usage(argv[0], EXIT_FAILURE);
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}
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#ifdef CONFIG_SMP
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if (cpu > 0 && cpu < CONFIG_SMP_NCPUS)
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{
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cpu_set_t cpu_mask;
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CPU_ZERO(&cpu_mask);
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CPU_SET(cpu, &cpu_mask);
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pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpu_mask);
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}
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#endif
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while (1)
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{
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up_udelay(per * CPULOAD_DELAY / 100);
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usleep((100 - per) * CPULOAD_DELAY / 100);
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}
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return 0;
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}
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