[src/trunk]: src/tests/syscall Verify that nanosleep(2) can suspend for one n...

[jruoho <jruoho%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bc41eee37b79
branches:  trunk
changeset: 764731:bc41eee37b79
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Mon May 02 07:02:09 2011 +0000

description:
Verify that nanosleep(2) can suspend for one nanosecond (or longer).

diffstat:

 tests/syscall/t_nanosleep.c |  28 +++++++++++++++++++++-------
 1 files changed, 21 insertions(+), 7 deletions(-)

diffs (61 lines):

diff -r 1dffe5c5262b -r bc41eee37b79 tests/syscall/t_nanosleep.c
--- a/tests/syscall/t_nanosleep.c       Mon May 02 06:43:16 2011 +0000
+++ b/tests/syscall/t_nanosleep.c       Mon May 02 07:02:09 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_nanosleep.c,v 1.4 2011/05/01 09:44:26 jruoho Exp $ */
+/* $NetBSD: t_nanosleep.c,v 1.5 2011/05/02 07:02:09 jruoho Exp $ */
 
 /*-
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_nanosleep.c,v 1.4 2011/05/01 09:44:26 jruoho Exp $");
+__RCSID("$NetBSD: t_nanosleep.c,v 1.5 2011/05/02 07:02:09 jruoho Exp $");
 
 #include <sys/time.h>
 #include <sys/wait.h>
@@ -58,14 +58,14 @@
 
 ATF_TC_BODY(nanosleep_basic, tc)
 {
-       static const size_t maxiter = 100;
+       static const size_t maxiter = 10;
        struct timespec ts1, ts2, tsn;
        size_t i;
 
-       for (i = 0; i < maxiter; i++) {
+       for (i = 1; i < maxiter; i++) {
 
                tsn.tv_sec = 0;
-               tsn.tv_nsec = 1;
+               tsn.tv_nsec = i;
 
                (void)memset(&ts1, 0, sizeof(struct timespec));
                (void)memset(&ts2, 0, sizeof(struct timespec));
@@ -74,8 +74,22 @@
                ATF_REQUIRE(nanosleep(&tsn, NULL) == 0);
                ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts2) == 0);
 
-               if (timespeccmp(&ts2, &ts1, <) != 0)
-                       atf_tc_fail("inaccuracies in sleep time");
+               /*
+                * Verify that we slept at least one nanosecond.
+                */
+               if (timespeccmp(&ts2, &ts1, <=) != 0) {
+
+                       (void)fprintf(stderr,
+                           "sleep time:: sec %lu, nsec %lu\n\t\t"
+                           "ts1: sec %lu, nsec %lu\n\t\t"
+                           "ts2: sec %lu, nsec %lu\n",
+                           tsn.tv_sec, tsn.tv_nsec,
+                           ts1.tv_sec, ts1.tv_nsec,
+                           ts2.tv_sec, ts2.tv_nsec);
+
+                       atf_tc_fail_nonfatal("inaccuracies in sleep time "
+                           "(resolution = %lu nsec)", tsn.tv_nsec);
+               }
        }
 }