b841065043
There is no need to keep timers tests in sync with external timers repo. Drop support for !KTEST to support for building and running timers tests without kselftest framework. Reference: https://lkml.org/lkml/2017/8/10/952 Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> Acked-by: John Stultz <john.stultz@linaro.org>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/* ADJ_FREQ Skew consistency test
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* by: john stultz (johnstul@us.ibm.com)
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* (C) Copyright IBM 2012
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* Licensed under the GPLv2
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*
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* NOTE: This is a meta-test which cranks the ADJ_FREQ knob back
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* and forth and watches for consistency problems. Thus this test requires
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* that the inconsistency-check tests be present in the same directory it
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* is run from.
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*
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* To build:
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* $ gcc skew_consistency.c -o skew_consistency -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 <stdlib.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/timex.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include "../kselftest.h"
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#define NSEC_PER_SEC 1000000000LL
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int main(int argv, char **argc)
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{
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struct timex tx;
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int ret, ppm;
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pid_t pid;
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printf("Running Asynchronous Frequency Changing Tests...\n");
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pid = fork();
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if (!pid)
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return system("./inconsistency-check -c 1 -t 600");
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ppm = 500;
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ret = 0;
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while (pid != waitpid(pid, &ret, WNOHANG)) {
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ppm = -ppm;
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tx.modes = ADJ_FREQUENCY;
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tx.freq = ppm << 16;
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adjtimex(&tx);
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usleep(500000);
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}
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/* Set things back */
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tx.modes = ADJ_FREQUENCY;
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tx.offset = 0;
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adjtimex(&tx);
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if (ret) {
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printf("[FAILED]\n");
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return ksft_exit_fail();
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}
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printf("[OK]\n");
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return ksft_exit_pass();
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}
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