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selftests/timers: Add set-tai from the timetest suite

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This patch adds the set-tai test which ensures the tai offset
can be set properly from adjtimex.

Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Tested-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
John Stultz 2015-03-11 17:40:13 -07:00 committed by Shuah Khan
parent d7b2902c15
commit 3a92a15fba
2 changed files with 81 additions and 1 deletions
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3
tools/testing/selftests/timers/Makefile
View file

@ -5,7 +5,7 @@ LDFLAGS += -lrt -lpthread
bins = posix_timers nanosleep inconsistency-check nsleep-lat raw_skew \
set-timer-lat threadtest mqueue-lat valid-adjtimex \
alarmtimer-suspend change_skew skew_consistency clocksource-switch \
leap-a-day leapcrash
leap-a-day leapcrash set-tai
all: ${bins}
@ -32,6 +32,7 @@ run_destructive_tests: run_tests
./clocksource-switch
./leap-a-day -s -i 10
./leapcrash
./set-tai
clean:
rm -f ${bins}

79
tools/testing/selftests/timers/set-tai.c Normal file
View file

@ -0,0 +1,79 @@
/* Set tai offset
* by: John Stultz <john.stultz@linaro.org>
* (C) Copyright Linaro 2013
* Licensed under the GPLv2
*
* 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 <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <sys/timex.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#ifdef KTEST
#include "../kselftest.h"
#else
static inline int ksft_exit_pass(void)
{
exit(0);
}
static inline int ksft_exit_fail(void)
{
exit(1);
}
#endif
int set_tai(int offset)
{
struct timex tx;
memset(&tx, 0, sizeof(tx));
tx.modes = ADJ_TAI;
tx.constant = offset;
return adjtimex(&tx);
}
int get_tai(void)
{
struct timex tx;
memset(&tx, 0, sizeof(tx));
adjtimex(&tx);
return tx.tai;
}
int main(int argc, char **argv)
{
int i, ret;
ret = get_tai();
printf("tai offset started at %i\n", ret);
printf("Checking tai offsets can be properly set: ");
for (i = 1; i <= 60; i++) {
ret = set_tai(i);
ret = get_tai();
if (ret != i) {
printf("[FAILED] expected: %i got %i\n", i, ret);
return ksft_exit_fail();
}
}
printf("[OK]\n");
return ksft_exit_pass();
}