79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/* ADJ_FREQ Skew consistency test
|
|
* by: john stultz (johnstul@us.ibm.com)
|
|
* (C) Copyright IBM 2012
|
|
* Licensed under the GPLv2
|
|
*
|
|
* NOTE: This is a meta-test which cranks the ADJ_FREQ knob back
|
|
* and forth and watches for consistency problems. Thus this test requires
|
|
* that the inconsistency-check tests be present in the same directory it
|
|
* is run from.
|
|
*
|
|
* To build:
|
|
* $ gcc skew_consistency.c -o skew_consistency -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 <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
#include <sys/timex.h>
|
|
#include <time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/wait.h>
|
|
#include "../kselftest.h"
|
|
|
|
#define NSEC_PER_SEC 1000000000LL
|
|
|
|
int main(int argv, char **argc)
|
|
{
|
|
struct timex tx;
|
|
int ret, ppm;
|
|
pid_t pid;
|
|
|
|
|
|
printf("Running Asynchronous Frequency Changing Tests...\n");
|
|
|
|
pid = fork();
|
|
if (!pid)
|
|
return system("./inconsistency-check -c 1 -t 600");
|
|
|
|
ppm = 500;
|
|
ret = 0;
|
|
|
|
while (pid != waitpid(pid, &ret, WNOHANG)) {
|
|
ppm = -ppm;
|
|
tx.modes = ADJ_FREQUENCY;
|
|
tx.freq = ppm << 16;
|
|
adjtimex(&tx);
|
|
usleep(500000);
|
|
}
|
|
|
|
/* Set things back */
|
|
tx.modes = ADJ_FREQUENCY;
|
|
tx.offset = 0;
|
|
adjtimex(&tx);
|
|
|
|
|
|
if (ret) {
|
|
printf("[FAILED]\n");
|
|
return ksft_exit_fail();
|
|
}
|
|
printf("[OK]\n");
|
|
return ksft_exit_pass();
|
|
}
|