forked from Archive/PX4-Autopilot
207 lines
7.1 KiB
C
207 lines
7.1 KiB
C
/********************************************************************************
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* examples/ostest/roundrobin.c
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*
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* Copyright (C) 2007, 2008, 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <stdio.h>
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#include <stdbool.h>
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#include "ostest.h"
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#if CONFIG_RR_INTERVAL > 0
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/********************************************************************************
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* Definitions
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********************************************************************************/
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/* This numbers should be tuned for different processor speeds via .config file.
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* With default values the test takes about 30s on Cortex-M3 @ 24MHz. With 32767
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* range and 10 runs it takes ~320s. */
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#ifndef CONFIG_EXAMPLES_OSTEST_RR_RANGE
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# define CONFIG_EXAMPLES_OSTEST_RR_RANGE 10000
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# warning "CONFIG_EXAMPLES_OSTEST_RR_RANGE undefined, using default value = 10000"
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#elif (CONFIG_EXAMPLES_OSTEST_RR_RANGE < 1) || (CONFIG_EXAMPLES_OSTEST_RR_RANGE > 32767)
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# define CONFIG_EXAMPLES_OSTEST_RR_RANGE 10000
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# warning "Invalid value of CONFIG_EXAMPLES_OSTEST_RR_RANGE, using default value = 10000"
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#endif
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#ifndef CONFIG_EXAMPLES_OSTEST_RR_RUNS
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# define CONFIG_EXAMPLES_OSTEST_RR_RUNS 10
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# warning "CONFIG_EXAMPLES_OSTEST_RR_RUNS undefined, using default value = 10"
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#elif (CONFIG_EXAMPLES_OSTEST_RR_RUNS < 1) || (CONFIG_EXAMPLES_OSTEST_RR_RUNS > 32767)
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# define CONFIG_EXAMPLES_OSTEST_RR_RUNS 10
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# warning "Invalid value of CONFIG_EXAMPLES_OSTEST_RR_RUNS, using default value = 10"
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#endif
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/********************************************************************************
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* Private Functions
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********************************************************************************/
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/********************************************************************************
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* Name: get_primes
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*
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* Description
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* This function searches for prime numbers in the most primitive way possible.
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********************************************************************************/
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static void get_primes(int *count, int *last)
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{
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int number;
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int local_count = 0;
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*last = 0; // to make compiler happy
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for (number = 1; number < CONFIG_EXAMPLES_OSTEST_RR_RANGE; number++)
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{
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int div;
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bool is_prime = true;
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for (div = 2; div <= number / 2; div++)
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if (number % div == 0)
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{
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is_prime = false;
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break;
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}
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if (is_prime)
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{
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local_count++;
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*last = number;
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#if 0 /* We don't really care what the numbers are */
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printf(" Prime %d: %d\n", local_count, number);
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#endif
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}
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}
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*count = local_count;
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}
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/********************************************************************************
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* Name: get_primes_thread
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********************************************************************************/
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static void *get_primes_thread(void *parameter)
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{
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int id = (int)parameter;
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int i, count, last;
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printf("get_primes_thread id=%d started, looking for primes < %d, doing %d run(s)\n",
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id, CONFIG_EXAMPLES_OSTEST_RR_RANGE, CONFIG_EXAMPLES_OSTEST_RR_RUNS);
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for (i = 0; i < CONFIG_EXAMPLES_OSTEST_RR_RUNS; i++)
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{
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get_primes(&count, &last);
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}
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printf("get_primes_thread id=%d finished, found %d primes, last one was %d\n",
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id, count, last);
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pthread_exit(NULL);
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return NULL; /* To keep some compilers happy */
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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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* Name: rr_test
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********************************************************************************/
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void rr_test(void)
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{
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pthread_t get_primes1_thread;
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pthread_t get_primes2_thread;
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struct sched_param sparam;
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pthread_attr_t attr;
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pthread_addr_t result;
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int status;
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status = pthread_attr_init(&attr);
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if (status != OK)
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{
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printf("rr_test: pthread_attr_init failed, status=%d\n", status);
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}
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sparam.sched_priority = sched_get_priority_min(SCHED_FIFO);
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status = pthread_attr_setschedparam(&attr, &sparam);
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if (status != OK)
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{
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printf("rr_test: pthread_attr_setschedparam failed, status=%d\n", status);
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}
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else
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{
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printf("rr_test: Set thread priority to %d\n", sparam.sched_priority);
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}
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status = pthread_attr_setschedpolicy(&attr, SCHED_RR);
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if (status != OK)
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{
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printf("rr_test: pthread_attr_setschedpolicy failed, status=%d\n", status);
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}
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else
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{
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printf("rr_test: Set thread policy to SCHED_RR\n");
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}
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printf("rr_test: Starting first get_primes_thread\n");
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status = pthread_create(&get_primes1_thread, &attr, get_primes_thread, (void*)1);
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if (status != 0)
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{
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printf("rr_test: Error in thread 1 creation, status=%d\n", status);
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}
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printf("rr_test: Starting second get_primes_thread\n");
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status = pthread_create(&get_primes2_thread, &attr, get_primes_thread, (void*)2);
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if (status != 0)
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{
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printf("rr_test: Error in thread 2 creation, status=%d\n", status);
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}
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printf("rr_test: Waiting for threads to complete -- this should take awhile\n");
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printf("rr_test: If RR scheduling is working, they should start and complete at\n");
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printf("rr_test: about the same time\n");
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pthread_join(get_primes2_thread, &result);
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pthread_join(get_primes1_thread, &result);
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printf("rr_test: Done\n");
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}
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#endif /* CONFIG_RR_INTERVAL */
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