mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 19:11:31 +00:00
2d87048acb
So we have proper counters at the end of a test, e.g.: # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:8 error:0 Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: John Stultz <jstultz@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
170 lines
4.1 KiB
C
170 lines
4.1 KiB
C
/* Make sure timers don't return early
|
|
* by: john stultz (johnstul@us.ibm.com)
|
|
* John Stultz (john.stultz@linaro.org)
|
|
* (C) Copyright IBM 2012
|
|
* (C) Copyright Linaro 2013 2015
|
|
* Licensed under the GPLv2
|
|
*
|
|
* To build:
|
|
* $ gcc nanosleep.c -o nanosleep -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 <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <sys/timex.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include "../kselftest.h"
|
|
|
|
#define NSEC_PER_SEC 1000000000ULL
|
|
|
|
#define CLOCK_REALTIME 0
|
|
#define CLOCK_MONOTONIC 1
|
|
#define CLOCK_PROCESS_CPUTIME_ID 2
|
|
#define CLOCK_THREAD_CPUTIME_ID 3
|
|
#define CLOCK_MONOTONIC_RAW 4
|
|
#define CLOCK_REALTIME_COARSE 5
|
|
#define CLOCK_MONOTONIC_COARSE 6
|
|
#define CLOCK_BOOTTIME 7
|
|
#define CLOCK_REALTIME_ALARM 8
|
|
#define CLOCK_BOOTTIME_ALARM 9
|
|
#define CLOCK_HWSPECIFIC 10
|
|
#define CLOCK_TAI 11
|
|
#define NR_CLOCKIDS 12
|
|
|
|
#define UNSUPPORTED 0xf00f
|
|
|
|
char *clockstring(int clockid)
|
|
{
|
|
switch (clockid) {
|
|
case CLOCK_REALTIME:
|
|
return "CLOCK_REALTIME";
|
|
case CLOCK_MONOTONIC:
|
|
return "CLOCK_MONOTONIC";
|
|
case CLOCK_PROCESS_CPUTIME_ID:
|
|
return "CLOCK_PROCESS_CPUTIME_ID";
|
|
case CLOCK_THREAD_CPUTIME_ID:
|
|
return "CLOCK_THREAD_CPUTIME_ID";
|
|
case CLOCK_MONOTONIC_RAW:
|
|
return "CLOCK_MONOTONIC_RAW";
|
|
case CLOCK_REALTIME_COARSE:
|
|
return "CLOCK_REALTIME_COARSE";
|
|
case CLOCK_MONOTONIC_COARSE:
|
|
return "CLOCK_MONOTONIC_COARSE";
|
|
case CLOCK_BOOTTIME:
|
|
return "CLOCK_BOOTTIME";
|
|
case CLOCK_REALTIME_ALARM:
|
|
return "CLOCK_REALTIME_ALARM";
|
|
case CLOCK_BOOTTIME_ALARM:
|
|
return "CLOCK_BOOTTIME_ALARM";
|
|
case CLOCK_TAI:
|
|
return "CLOCK_TAI";
|
|
};
|
|
return "UNKNOWN_CLOCKID";
|
|
}
|
|
|
|
/* returns 1 if a <= b, 0 otherwise */
|
|
static inline int in_order(struct timespec a, struct timespec b)
|
|
{
|
|
if (a.tv_sec < b.tv_sec)
|
|
return 1;
|
|
if (a.tv_sec > b.tv_sec)
|
|
return 0;
|
|
if (a.tv_nsec > b.tv_nsec)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
struct timespec timespec_add(struct timespec ts, unsigned long long ns)
|
|
{
|
|
ts.tv_nsec += ns;
|
|
while (ts.tv_nsec >= NSEC_PER_SEC) {
|
|
ts.tv_nsec -= NSEC_PER_SEC;
|
|
ts.tv_sec++;
|
|
}
|
|
return ts;
|
|
}
|
|
|
|
int nanosleep_test(int clockid, long long ns)
|
|
{
|
|
struct timespec now, target, rel;
|
|
|
|
/* First check abs time */
|
|
if (clock_gettime(clockid, &now))
|
|
return UNSUPPORTED;
|
|
target = timespec_add(now, ns);
|
|
|
|
if (clock_nanosleep(clockid, TIMER_ABSTIME, &target, NULL))
|
|
return UNSUPPORTED;
|
|
clock_gettime(clockid, &now);
|
|
|
|
if (!in_order(target, now))
|
|
return -1;
|
|
|
|
/* Second check reltime */
|
|
clock_gettime(clockid, &now);
|
|
rel.tv_sec = 0;
|
|
rel.tv_nsec = 0;
|
|
rel = timespec_add(rel, ns);
|
|
target = timespec_add(now, ns);
|
|
clock_nanosleep(clockid, 0, &rel, NULL);
|
|
clock_gettime(clockid, &now);
|
|
|
|
if (!in_order(target, now))
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
long long length;
|
|
int clockid, ret;
|
|
|
|
ksft_print_header();
|
|
ksft_set_plan(NR_CLOCKIDS);
|
|
|
|
for (clockid = CLOCK_REALTIME; clockid < NR_CLOCKIDS; clockid++) {
|
|
|
|
/* Skip cputime clockids since nanosleep won't increment cputime */
|
|
if (clockid == CLOCK_PROCESS_CPUTIME_ID ||
|
|
clockid == CLOCK_THREAD_CPUTIME_ID ||
|
|
clockid == CLOCK_HWSPECIFIC) {
|
|
ksft_test_result_skip("%-31s\n", clockstring(clockid));
|
|
continue;
|
|
}
|
|
|
|
fflush(stdout);
|
|
|
|
length = 10;
|
|
while (length <= (NSEC_PER_SEC * 10)) {
|
|
ret = nanosleep_test(clockid, length);
|
|
if (ret == UNSUPPORTED) {
|
|
ksft_test_result_skip("%-31s\n", clockstring(clockid));
|
|
goto next;
|
|
}
|
|
if (ret < 0) {
|
|
ksft_test_result_fail("%-31s\n", clockstring(clockid));
|
|
ksft_exit_fail();
|
|
}
|
|
length *= 100;
|
|
}
|
|
ksft_test_result_pass("%-31s\n", clockstring(clockid));
|
|
next:
|
|
ret = 0;
|
|
}
|
|
ksft_exit_pass();
|
|
}
|