[src/tls-maxphys]: src/tests/lib/libc/gen More clean-up, and adjust timing of...

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

details:   https://anonhg.NetBSD.org/src/rev/527600797f73
branches:  tls-maxphys
changeset: 852950:527600797f73
user:      pgoyette <pgoyette%NetBSD.org@localhost>
date:      Fri Nov 09 20:13:25 2012 +0000

description:
More clean-up, and adjust timing of kevent test to avoid issues with
PR kern/43887

diffstat:

 tests/lib/libc/gen/t_sleep.c |  336 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 336 insertions(+), 0 deletions(-)

diffs (truncated from 340 to 300 lines):

diff -r 9829ada870d5 -r 527600797f73 tests/lib/libc/gen/t_sleep.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/libc/gen/t_sleep.c      Fri Nov 09 20:13:25 2012 +0000
@@ -0,0 +1,336 @@
+/* $NetBSD: t_sleep.c,v 1.5.2.2 2012/11/09 20:13:25 pgoyette Exp $ */
+
+/*-
+ * 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 <atf-c.h>
+#include <errno.h>
+#include <poll.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <sys/cdefs.h>
+#include <sys/event.h>
+#include <sys/signal.h>
+
+#define BILLION                1000000000LL    /* nano-seconds per second */
+#define MILLION                1000000LL       /* nano-seconds per milli-second */
+
+#define ALARM          6               /* SIGALRM after this many seconds */
+#define MAXSLEEP       22              /* Maximum delay in seconds */
+#define KEVNT_TIMEOUT  10300           /* measured in milli-seconds */
+#define FUZZ           (40 * MILLION)  /* scheduling fuzz accepted - 40 ms */
+
+/*
+ * Timer notes
+ *
+ * Most tests use FUZZ as their initial delay value, but 'sleep'
+ * starts at 1sec (since it cannot handle sub-second intervals).
+ * Subsequent passes double the previous interval, up to MAXSLEEP.
+ *
+ * The current values result in 5 passes for the 'sleep' test (at 1,
+ * 2, 4, 8, and 16 seconds) and 10 passes for the other tests (at
+ * 0.04, 0.08, 0.16, 0.32, 0.64, 1.28, 2.56, 5.12, 10.24, and 20.48
+ * seconds).
+ *
+ * The ALARM is only set if the current pass's delay is longer, and
+ * only if the ALARM has not already been triggered.
+ *
+ * The 'kevent' test needs the ALARM to be set on a different pass
+ * from when the KEVNT_TIMEOUT fires.  So set ALARM to fire on the
+ * penultimate pass, and the KEVNT_TIMEOUT on the final pass.  We
+ * set KEVNT_TIMEOUT just barely long enough to put it into the
+ * last test pass, and set MAXSLEEP a couple seconds longer than
+ * necessary,in order to avoid a QEMU bug which nearly doubles
+ * some timers.
+ */
+
+static volatile int sig;
+
+int sleeptest(int (*)(struct timespec *, struct timespec *), bool, bool);
+int do_nanosleep(struct timespec *, struct timespec *);
+int do_select(struct timespec *, struct timespec *);
+int do_poll(struct timespec *, struct timespec *);
+int do_sleep(struct timespec *, struct timespec *);
+int do_kevent(struct timespec *, struct timespec *);
+void sigalrm(int);
+
+void
+sigalrm(int s)
+{
+
+       sig++;
+}
+
+int
+do_nanosleep(struct timespec *delay, struct timespec *remain)
+{
+       int ret;
+
+       if (nanosleep(delay, remain) == -1)
+               ret = (errno == EINTR ? 0 : errno);
+       else
+               ret = 0;
+       return ret;
+}
+
+int
+do_select(struct timespec *delay, struct timespec *remain)
+{
+       int ret;
+       struct timeval tv;
+
+       TIMESPEC_TO_TIMEVAL(&tv, delay);
+       if (select(0, NULL, NULL, NULL, &tv) == -1)
+               ret = (errno == EINTR ? 0 : errno);
+       else
+               ret = 0;
+       return ret;
+}
+
+int
+do_poll(struct timespec *delay, struct timespec *remain)
+{
+       int ret;
+       struct timeval tv;
+
+       TIMESPEC_TO_TIMEVAL(&tv, delay);
+       if (pollts(NULL, 0, delay, NULL) == -1)
+               ret = (errno == EINTR ? 0 : errno);
+       else
+               ret = 0;
+       return ret;
+}
+
+int
+do_sleep(struct timespec *delay, struct timespec *remain)
+{
+       struct timeval tv;
+
+       TIMESPEC_TO_TIMEVAL(&tv, delay);
+       remain->tv_sec = sleep(delay->tv_sec);
+       remain->tv_nsec = 0;
+
+       return 0;
+}
+
+int
+do_kevent(struct timespec *delay, struct timespec *remain)
+{
+       struct kevent ktimer;
+       struct kevent kresult;
+       int rtc, kq, kerrno;
+       int tmo;
+
+       ATF_REQUIRE_MSG((kq = kqueue()) != -1, "kqueue: %s", strerror(errno));
+
+       tmo = KEVNT_TIMEOUT;
+
+       /*
+        * If we expect the KEVNT_TIMEOUT to fire, and we're running
+        * under QEMU, make sure the delay is long enough to account
+        * for the effects of PR kern/43997 !
+        */
+       if (system("cpuctl identify 0 | grep -q QEMU") == 0 &&
+           tmo/1000 < delay->tv_sec && tmo/500 > delay->tv_sec)
+               delay->tv_sec = MAXSLEEP;
+
+       EV_SET(&ktimer, 1, EVFILT_TIMER, EV_ADD, 0, tmo, 0);
+
+       rtc = kevent(kq, &ktimer, 1, &kresult, 1, delay);
+       kerrno = errno;
+
+       (void)close(kq);
+
+       if (rtc == -1) {
+               ATF_REQUIRE_MSG(kerrno == EINTR, "kevent: %s", strerror(errno));
+               return 0;
+       }
+
+       if (delay->tv_sec * BILLION + delay->tv_nsec > tmo * MILLION)
+               ATF_REQUIRE_MSG(rtc > 0,
+                   "kevent: KEVNT_TIMEOUT did not cause EVFILT_TIMER event");
+
+       return 0;
+}
+
+ATF_TC(nanosleep);
+ATF_TC_HEAD(nanosleep, tc) 
+{
+ 
+       atf_tc_set_md_var(tc, "descr", "Test nanosleep(2) timing");
+       atf_tc_set_md_var(tc, "timeout", "65");
+} 
+
+ATF_TC_BODY(nanosleep, tc)
+{
+
+       sleeptest(do_nanosleep, true, false);
+}
+
+ATF_TC(select);
+ATF_TC_HEAD(select, tc) 
+{
+ 
+       atf_tc_set_md_var(tc, "descr", "Test select(2) timing");
+       atf_tc_set_md_var(tc, "timeout", "65");
+} 
+
+ATF_TC_BODY(select, tc)
+{
+
+       sleeptest(do_select, true, true);
+}
+
+ATF_TC(poll);
+ATF_TC_HEAD(poll, tc) 
+{
+ 
+       atf_tc_set_md_var(tc, "descr", "Test poll(2) timing");
+       atf_tc_set_md_var(tc, "timeout", "65");
+} 
+
+ATF_TC_BODY(poll, tc)
+{
+
+       sleeptest(do_poll, true, true);
+}
+
+ATF_TC(sleep);
+ATF_TC_HEAD(sleep, tc) 
+{
+ 
+       atf_tc_set_md_var(tc, "descr", "Test sleep(3) timing");
+       atf_tc_set_md_var(tc, "timeout", "65");
+} 
+
+ATF_TC_BODY(sleep, tc)
+{
+
+       sleeptest(do_sleep, false, false);
+}
+
+ATF_TC(kevent);
+ATF_TC_HEAD(kevent, tc) 
+{
+ 
+       atf_tc_set_md_var(tc, "descr", "Test kevent(2) timing");
+       atf_tc_set_md_var(tc, "timeout", "65");
+} 
+
+ATF_TC_BODY(kevent, tc)
+{
+
+       sleeptest(do_kevent, true, true);
+}
+
+int
+sleeptest(int (*test)(struct timespec *, struct timespec *),
+          bool subsec, bool sim_remain)
+{
+       struct timespec tsa, tsb, tslp, tremain;
+       int64_t delta1, delta2, delta3, round;
+
+       sig = 0;
+       signal(SIGALRM, sigalrm);
+
+       if (subsec) {
+               round = 1;
+               delta3 = FUZZ;
+       } else {
+               round = 1000000000;
+               delta3 = round;
+       }
+
+       tslp.tv_sec = delta3 / 1000000000;
+       tslp.tv_nsec = delta3 % 1000000000;
+
+       while (tslp.tv_sec <= MAXSLEEP) {
+               /*
+                * disturb sleep by signal on purpose
+                */ 
+               if (tslp.tv_sec > ALARM && sig == 0)
+                       alarm(ALARM);
+
+               clock_gettime(CLOCK_REALTIME, &tsa);
+               (*test)(&tslp, &tremain);
+               clock_gettime(CLOCK_REALTIME, &tsb);
+
+               if (sim_remain) {
+                       timespecsub(&tsb, &tsa, &tremain);
+                       timespecsub(&tslp, &tremain, &tremain);
+               }
+
+               delta1 = (int64_t)tsb.tv_sec - (int64_t)tsa.tv_sec;
+               delta1 *= BILLION;
+               delta1 += (int64_t)tsb.tv_nsec - (int64_t)tsa.tv_nsec;
+
+               delta2 = (int64_t)tremain.tv_sec * BILLION;
+               delta2 += (int64_t)tremain.tv_nsec;
+