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