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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/timers/skew_consistency.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/timers/skew_consistency.c')
-rw-r--r-- | tools/testing/selftests/timers/skew_consistency.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c new file mode 100644 index 000000000..8066be9af --- /dev/null +++ b/tools/testing/selftests/timers/skew_consistency.c @@ -0,0 +1,77 @@ +/* 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 <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(); +} |