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