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/*
* (C) Finite State Machine Labs Inc. 2001 business@fsmlabs.com
*
* Released under the terms of GPL 2.
* Open RTLinux makes use of a patented process described in
* US Patent 5,995,745. Use of this process is governed
* by the Open RTLinux Patent License which can be obtained from
* www.fsmlabs.com/PATENT or by sending email to
* licensequestions@fsmlabs.com
*/
#include <rtl.h>
#include <pthread.h>
#include <rtl_sched.h>
#include <rtl_time.h>
#include <rtl_fifo.h>
#include "switch_test.h"
#define MODULE_NAME "switch_time"
MODULE_AUTHOR("Nathan Paul Simons <npsimons@fsmlabs.com>");
MODULE_DESCRIPTION
("RTLinux context switch time regression test kernel module");
int fifo_nr = 1, fifo_sz = 8192;
MODULE_PARM(fifo_sz, "i");
MODULE_PARM_DESC(fifo_sz, "Size of FIFO.");
MODULE_PARM(fifo_nr, "i");
MODULE_PARM_DESC(fifo_nr,
"RTL-FIFO number to create (ie, 0 -> /dev/rtf0)");
hrtime_t time1[num_tests], time2[num_tests], elapsed[num_tests];
static pthread_t thread0, thread1, thread2;
char *rtl_strerr(int thiserr)
{
switch (thiserr) {
case EINVAL:
return "EINVAL";
case EDEADLK:
return "EDEADLK";
case EPERM:
return "EPERM";
case -ENODEV:
return "-ENODEV";
case -EINVAL:
return "-EINVAL";
case -EPERM:
return "-EPERM";
case -ESRCH:
return "-ESRCH";
case -EFAULT:
return "-EFAULT";
case -EBUSY:
return "-EBUSY";
case -ENOMEM:
return "-ENOMEM";
case -ENOSPC:
return "-ENOSPC";
case -EAGAIN:
return "-EAGAIN";
default:
return "unknown error";
}
}
void *handler1(void *arg)
{
int i;
for (i = 0; i < num_tests; i++) {
pthread_suspend_np(pthread_self());
time1[i] = clock_gethrtime(CLOCK_REALTIME);
pthread_wakeup_np(thread2);
}
return NULL;
}
void *handler2(void *arg)
{
int i;
for (i = 0; i < num_tests; i++) {
pthread_suspend_np(pthread_self());
time2[i] = clock_gethrtime(CLOCK_REALTIME);
}
return NULL;
}
void *starter(void *arg)
{
int retval, i, copy_size;
struct sched_param my_sparam;
copy_size = (sizeof(hrtime_t) * (num_tests));
my_sparam.sched_priority = 3;
if (
(retval =
pthread_setschedparam(pthread_self(), SCHED_FIFO,
&my_sparam)) != 0) {
rtl_printf("%s: pthread_setschedparam(): %s\n",
MODULE_NAME, rtl_strerr(retval));
return NULL;
}
pthread_make_periodic_np(pthread_self(),
clock_gethrtime(CLOCK_REALTIME), 500000);
for (i = 0; i < num_tests; i++) {
pthread_wakeup_np(thread1);
pthread_wait_np();
}
if ((retval = rtf_put(fifo_nr, time1, copy_size)) < copy_size) {
rtl_printf("%s: rtf_put(%d, time1, %d): %s\n", MODULE_NAME,
fifo_nr, copy_size, rtl_strerr(retval));
return (void *) retval;
}
if ((retval = rtf_put(fifo_nr, time2, copy_size)) < copy_size) {
rtl_printf("%s: rtf_put(%d, time2, %d): %s\n", MODULE_NAME,
fifo_nr, copy_size, rtl_strerr(retval));
return (void *) retval;
}
return NULL;
}
int init_module(void)
{
int retval;
rtf_destroy(fifo_nr);
if ((retval = rtf_create(fifo_nr, fifo_sz)) != 0) {
rtl_printf("%s: rtf_create(%d, %d): %s\n", MODULE_NAME,
fifo_nr, fifo_sz, rtl_strerr(retval));
return retval;
}
if ((retval = pthread_create(&thread1, NULL, handler1, 0))) {
rtl_printf
("%s: pthread_create(&thread1, NULL, handler1, 0): %s\n",
MODULE_NAME, rtl_strerr(retval));
return retval;
}
if ((retval = pthread_create(&thread2, NULL, handler2, 0))) {
rtl_printf
("%s: pthread_create(&thread2, NULL, handler2, 0): %s\n",
MODULE_NAME, rtl_strerr(retval));
return retval;
}
/* pthread_wakeup_np(thread1); */
if ((retval = pthread_create(&thread0, NULL, starter, 0))) {
rtl_printf
("%s: pthread_create(&thread0, NULL, starter, 0): %s\n",
MODULE_NAME, rtl_strerr(retval));
return retval;
}
return 0;
}
void cleanup_module(void)
{
rtf_destroy(fifo_nr);
/* elapsed = time2 - time1;
rtl_printf("time1: %u time2: %u elapsed: %u\n", time1,
time2, elapsed); */
}
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