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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/* ADJ_FREQ Skew change 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 and
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* then uses other tests to detect problems. Thus this test requires
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* that the raw_skew, inconsistency-check and nanosleep tests be
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* present in the same directory it is run from.
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*
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* To build:
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* $ gcc change_skew.c -o change_skew -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 <sys/time.h>
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#include <sys/timex.h>
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#include <time.h>
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#include "../kselftest.h"
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#define NSEC_PER_SEC 1000000000LL
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int change_skew_test(int ppm)
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{
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struct timex tx;
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int ret;
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tx.modes = ADJ_FREQUENCY;
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tx.freq = ppm << 16;
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ret = adjtimex(&tx);
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if (ret < 0) {
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printf("Error adjusting freq\n");
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return ret;
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}
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ret = system("./raw_skew");
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ret |= system("./inconsistency-check");
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ret |= system("./nanosleep");
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return ret;
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}
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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 i, ret;
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int ppm[5] = {0, 250, 500, -250, -500};
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/* Kill ntpd */
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ret = system("killall -9 ntpd");
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/* Make sure there's no offset adjustment going on */
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tx.modes = ADJ_OFFSET;
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tx.offset = 0;
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ret = adjtimex(&tx);
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if (ret < 0) {
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printf("Maybe you're not running as root?\n");
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return -1;
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}
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for (i = 0; i < 5; i++) {
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printf("Using %i ppm adjustment\n", ppm[i]);
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ret = change_skew_test(ppm[i]);
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if (ret)
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break;
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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("[FAIL]");
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return ksft_exit_fail();
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}
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printf("[OK]");
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return ksft_exit_pass();
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}
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