diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libc/sys/t_clock_gettime.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libc/sys/t_clock_gettime.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libc/sys/t_clock_gettime.c b/contrib/netbsd-tests/lib/libc/sys/t_clock_gettime.c new file mode 100644 index 0000000..69890fd --- /dev/null +++ b/contrib/netbsd-tests/lib/libc/sys/t_clock_gettime.c @@ -0,0 +1,212 @@ +/* $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(); +} |
