minix/tests/lib/libc/sys/t_clock_gettime.c
Lionel Sambuc 11be35a165 Importing NetBSD "Kyua" test framework
To do so, a few dependencies have been imported:

 * external/bsd/lutok
 * external/mit/lua
 * external/public-domain/sqlite
 * external/public-domain/xz

The Kyua framework is the new generation of ATF (Automated Test
Framework), it is composed of:

 * external/bsd/atf
 * external/bsd/kyua-atf-compat
 * external/bsd/kyua-cli
 * external/bsd/kyua-tester
 * tests

Kyua/ATF being written in C++, it depends on libstdc++ which is
provided by GCC. As this is not part of the sources, Kyua is only
compiled when the native GCC utils are installed.

To install Kyua do the following:

 * In a cross-build enviromnent, add the following to the build.sh
   commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes

WARNING:
  At this point the import is still experimental, and not supported
  on native builds (a.k.a make build).

Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada
2013-07-23 20:43:41 +02:00

212 lines
6.4 KiB
C

/* $NetBSD: t_clock_gettime.c,v 1.1 2011/10/15 06:42:16 jruoho Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank Kardel.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (c) 2006 Frank Kardel
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__COPYRIGHT("@(#) Copyright (c) 2008\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_clock_gettime.c,v 1.1 2011/10/15 06:42:16 jruoho Exp $");
#include <sys/param.h>
#include <sys/sysctl.h>
#include <machine/int_limits.h>
#include <atf-c.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "../../../h_macros.h"
#define MINPOSDIFF 15000000 /* 15 ms for now */
#define TIMEOUT 5
#define TC_HARDWARE "kern.timecounter.hardware"
#define TC_CHOICE "kern.timecounter.choice"
static void
check_timecounter(void)
{
struct timespec tsa, tsb, tsl, res;
long long mindiff = INTMAX_MAX;
time_t endlimit;
#define CL(x) \
do { \
if ((x) != -1) \
break; \
atf_tc_fail_nonfatal("%s: %s", #x, strerror(errno)); \
return; \
} while (0)
CL(clock_gettime(CLOCK_REALTIME, &tsa));
tsl = tsa;
CL(time(&endlimit));
endlimit += TIMEOUT + 1;
while ((time_t)tsa.tv_sec < endlimit) {
long long diff;
CL(clock_gettime(CLOCK_REALTIME, &tsb));
diff = 1000000000LL * (tsb.tv_sec - tsa.tv_sec)
+ tsb.tv_nsec - tsa.tv_nsec;
if (diff > 0 && mindiff > diff)
mindiff = diff;
if (diff < 0 || diff > MINPOSDIFF) {
long long elapsed;
(void)printf("%stime TSA: 0x%jx.%08jx, TSB: 0x%jx.%08jx, "
"diff = %lld nsec, ", (diff < 0) ? "BAD " : "",
(uintmax_t)tsa.tv_sec, (uintmax_t)tsa.tv_nsec,
(uintmax_t)tsb.tv_sec, (uintmax_t)tsb.tv_nsec, diff);
elapsed = 1000000000LL * (tsb.tv_sec - tsl.tv_sec)
+ tsb.tv_nsec - tsl.tv_nsec;
(void)printf("%lld nsec\n", elapsed);
tsl = tsb;
ATF_CHECK(diff >= 0);
if (diff < 0)
return;
}
tsa.tv_sec = tsb.tv_sec;
tsa.tv_nsec = tsb.tv_nsec;
}
if (clock_getres(CLOCK_REALTIME, &res) == 0) {
long long r = res.tv_sec * 1000000000 + res.tv_nsec;
(void)printf("Claimed resolution: %lld nsec (%f Hz) or "
"better\n", r, 1.0 / r * 1e9);
(void)printf("Observed minimum non zero delta: %lld "
"nsec\n", mindiff);
}
#undef CL
}
ATF_TC(clock_gettime_real);
ATF_TC_HEAD(clock_gettime_real, tc)
{
atf_tc_set_md_var(tc, "require.user", "root");
atf_tc_set_md_var(tc, "descr",
"Checks the monotonicity of the CLOCK_REALTIME implementation");
atf_tc_set_md_var(tc, "timeout", "300");
}
ATF_TC_BODY(clock_gettime_real, tc)
{
char name[128], cbuf[512], ctrbuf[10240];
size_t cbufsiz = sizeof(cbuf);
size_t ctrbufsiz = sizeof(ctrbuf);
const char *p;
char *save;
int quality, n;
if (sysctlbyname(TC_HARDWARE, cbuf, &cbufsiz, NULL, 0) != 0) {
(void)printf("\nChecking legacy time implementation "
"for %d seconds\n", TIMEOUT);
check_timecounter();
return;
/* NOTREACHED */
}
(void)printf("%s = %s\n", TC_HARDWARE, cbuf);
REQUIRE_LIBC(save = strdup(cbuf), NULL);
RL(sysctlbyname(TC_CHOICE, ctrbuf, &ctrbufsiz, NULL, 0));
(void)printf("%s = %s\n", TC_CHOICE, ctrbuf);
for (p = ctrbuf, n = 0; sscanf(p, "%127[^(](q=%d, f=%*u Hz)%*[ ]%n",
name, &quality, &n) == 2; p += n) {
struct timespec ts;
int ret;
if (quality < 0)
continue;
(void)printf("\nChecking %s for %d seconds\n", name, TIMEOUT);
CHECK_LIBC(ret = sysctlbyname(TC_HARDWARE, NULL, 0,
name, strlen(name)), -1);
if (ret == -1)
continue;
/* wait a bit to select new counter in clockinterrupt */
ts.tv_sec = 0;
ts.tv_nsec = 100000000;
(void)nanosleep(&ts, NULL);
check_timecounter();
}
RL(sysctlbyname(TC_HARDWARE, NULL, 0, save, strlen(save)));
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, clock_gettime_real);
return atf_no_error();
}