179 lines
4.3 KiB
C
Executable file
179 lines
4.3 KiB
C
Executable file
/* alarmtimer suspend test
|
|
* John Stultz (john.stultz@linaro.org)
|
|
* (C) Copyright Linaro 2013
|
|
* Licensed under the GPLv2
|
|
*
|
|
* This test makes sure the alarmtimer & RTC wakeup code is
|
|
* functioning.
|
|
*
|
|
* To build:
|
|
* $ gcc alarmtimer-suspend.c -o alarmtimer-suspend -lrt
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <pthread.h>
|
|
#include "../kselftest.h"
|
|
|
|
#define CLOCK_REALTIME 0
|
|
#define CLOCK_MONOTONIC 1
|
|
#define CLOCK_PROCESS_CPUTIME_ID 2
|
|
#define CLOCK_THREAD_CPUTIME_ID 3
|
|
#define CLOCK_MONOTONIC_RAW 4
|
|
#define CLOCK_REALTIME_COARSE 5
|
|
#define CLOCK_MONOTONIC_COARSE 6
|
|
#define CLOCK_BOOTTIME 7
|
|
#define CLOCK_REALTIME_ALARM 8
|
|
#define CLOCK_BOOTTIME_ALARM 9
|
|
#define CLOCK_HWSPECIFIC 10
|
|
#define CLOCK_TAI 11
|
|
#define NR_CLOCKIDS 12
|
|
|
|
|
|
#define NSEC_PER_SEC 1000000000ULL
|
|
#define UNREASONABLE_LAT (NSEC_PER_SEC * 5) /* hopefully we resume in 5 secs */
|
|
|
|
#define SUSPEND_SECS 15
|
|
int alarmcount;
|
|
int alarm_clock_id;
|
|
struct timespec start_time;
|
|
|
|
|
|
char *clockstring(int clockid)
|
|
{
|
|
switch (clockid) {
|
|
case CLOCK_REALTIME:
|
|
return "CLOCK_REALTIME";
|
|
case CLOCK_MONOTONIC:
|
|
return "CLOCK_MONOTONIC";
|
|
case CLOCK_PROCESS_CPUTIME_ID:
|
|
return "CLOCK_PROCESS_CPUTIME_ID";
|
|
case CLOCK_THREAD_CPUTIME_ID:
|
|
return "CLOCK_THREAD_CPUTIME_ID";
|
|
case CLOCK_MONOTONIC_RAW:
|
|
return "CLOCK_MONOTONIC_RAW";
|
|
case CLOCK_REALTIME_COARSE:
|
|
return "CLOCK_REALTIME_COARSE";
|
|
case CLOCK_MONOTONIC_COARSE:
|
|
return "CLOCK_MONOTONIC_COARSE";
|
|
case CLOCK_BOOTTIME:
|
|
return "CLOCK_BOOTTIME";
|
|
case CLOCK_REALTIME_ALARM:
|
|
return "CLOCK_REALTIME_ALARM";
|
|
case CLOCK_BOOTTIME_ALARM:
|
|
return "CLOCK_BOOTTIME_ALARM";
|
|
case CLOCK_TAI:
|
|
return "CLOCK_TAI";
|
|
};
|
|
return "UNKNOWN_CLOCKID";
|
|
}
|
|
|
|
|
|
long long timespec_sub(struct timespec a, struct timespec b)
|
|
{
|
|
long long ret = NSEC_PER_SEC * b.tv_sec + b.tv_nsec;
|
|
|
|
ret -= NSEC_PER_SEC * a.tv_sec + a.tv_nsec;
|
|
return ret;
|
|
}
|
|
|
|
int final_ret = 0;
|
|
|
|
void sigalarm(int signo)
|
|
{
|
|
long long delta_ns;
|
|
struct timespec ts;
|
|
|
|
clock_gettime(alarm_clock_id, &ts);
|
|
alarmcount++;
|
|
|
|
delta_ns = timespec_sub(start_time, ts);
|
|
delta_ns -= NSEC_PER_SEC * SUSPEND_SECS * alarmcount;
|
|
|
|
printf("ALARM(%i): %ld:%ld latency: %lld ns ", alarmcount, ts.tv_sec,
|
|
ts.tv_nsec, delta_ns);
|
|
|
|
if (delta_ns > UNREASONABLE_LAT) {
|
|
printf("[FAIL]\n");
|
|
final_ret = -1;
|
|
} else
|
|
printf("[OK]\n");
|
|
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
timer_t tm1;
|
|
struct itimerspec its1, its2;
|
|
struct sigevent se;
|
|
struct sigaction act;
|
|
int signum = SIGRTMAX;
|
|
|
|
/* Set up signal handler: */
|
|
sigfillset(&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
act.sa_handler = sigalarm;
|
|
sigaction(signum, &act, NULL);
|
|
|
|
/* Set up timer: */
|
|
memset(&se, 0, sizeof(se));
|
|
se.sigev_notify = SIGEV_SIGNAL;
|
|
se.sigev_signo = signum;
|
|
se.sigev_value.sival_int = 0;
|
|
|
|
for (alarm_clock_id = CLOCK_REALTIME_ALARM;
|
|
alarm_clock_id <= CLOCK_BOOTTIME_ALARM;
|
|
alarm_clock_id++) {
|
|
|
|
alarmcount = 0;
|
|
if (timer_create(alarm_clock_id, &se, &tm1) == -1) {
|
|
printf("timer_create failed, %s unsupported?\n",
|
|
clockstring(alarm_clock_id));
|
|
break;
|
|
}
|
|
|
|
clock_gettime(alarm_clock_id, &start_time);
|
|
printf("Start time (%s): %ld:%ld\n", clockstring(alarm_clock_id),
|
|
start_time.tv_sec, start_time.tv_nsec);
|
|
printf("Setting alarm for every %i seconds\n", SUSPEND_SECS);
|
|
its1.it_value = start_time;
|
|
its1.it_value.tv_sec += SUSPEND_SECS;
|
|
its1.it_interval.tv_sec = SUSPEND_SECS;
|
|
its1.it_interval.tv_nsec = 0;
|
|
|
|
timer_settime(tm1, TIMER_ABSTIME, &its1, &its2);
|
|
|
|
while (alarmcount < 5)
|
|
sleep(1); /* First 5 alarms, do nothing */
|
|
|
|
printf("Starting suspend loops\n");
|
|
while (alarmcount < 10) {
|
|
int ret;
|
|
|
|
sleep(3);
|
|
ret = system("echo mem > /sys/power/state");
|
|
if (ret)
|
|
break;
|
|
}
|
|
timer_delete(tm1);
|
|
}
|
|
if (final_ret)
|
|
return ksft_exit_fail();
|
|
return ksft_exit_pass();
|
|
}
|