[p5sagit/p5-mst-13.2.git] / ext / Time / HiRes / t / HiRes.t

#!./perl -w

BEGIN {
    if ($ENV{PERL_CORE}) {
	chdir 't' if -d 't';
	@INC = '../lib';
	require Config; import Config;
	if (" $Config{'extensions'} " !~ m[ Time/HiRes ]) {
	    print "1..0 # Skip -- Perl configured without Time::HiRes module\n";
	    exit 0;
	}
    }
}

BEGIN { $| = 1; print "1..31\n"; }

END { print "not ok 1\n" unless $loaded }

use Time::HiRes qw(tv_interval);

$loaded = 1;

print "ok 1\n";

use strict;

my $have_gettimeofday	= &Time::HiRes::d_gettimeofday;
my $have_usleep		= &Time::HiRes::d_usleep;
my $have_nanosleep	= &Time::HiRes::d_nanosleep;
my $have_ualarm		= &Time::HiRes::d_ualarm;
my $have_clock_gettime	= &Time::HiRes::d_clock_gettime;
my $have_clock_getres	= &Time::HiRes::d_clock_getres;

sub has_symbol {
    my $symbol = shift;
    eval "use Time::HiRes qw($symbol)";
    return 0 unless $@ eq '';
    eval "my \$a = $symbol";
    return $@ eq '';
}

printf "# have_gettimeofday  = %d\n", $have_gettimeofday;
printf "# have_usleep        = %d\n", $have_usleep;
printf "# have_nanosleep     = %d\n", $have_nanosleep;
printf "# have_ualarm        = %d\n", $have_ualarm;
printf "# have_clock_gettime = %d\n", $have_clock_gettime;
printf "# have_clock_getres  = %d\n", $have_clock_getres;

import Time::HiRes 'gettimeofday'	if $have_gettimeofday;
import Time::HiRes 'usleep'		if $have_usleep;
import Time::HiRes 'nanosleep'		if $have_nanosleep;
import Time::HiRes 'ualarm'		if $have_ualarm;
import Time::HiRes 'clock_gettime'	if $have_clock_gettime;
import Time::HiRes 'clock_getres'	if $have_clock_getres;

use Config;

use Time::HiRes qw(gettimeofday);

my $have_alarm = $Config{d_alarm};
my $have_fork  = $Config{d_fork};
my $waitfor = 60; # 10-20 seconds is normal (load affects this).
my $timer_pid;
my $TheEnd;

if ($have_fork) {
    print "# I am the main process $$, starting the timer process...\n";
    $timer_pid = fork();
    if (defined $timer_pid) {
	if ($timer_pid == 0) { # We are the kid, set up the timer.
	    print "# I am the timer process $$, sleeping for $waitfor seconds...\n";
	    sleep($waitfor);
	    warn "\n$0: overall time allowed for tests (${waitfor}s) exceeded!\n";
	    print "# Terminating the main process...\n";
	    kill('TERM', getppid());
	    print "# This is the timer process $$, over and out.\n";
	    exit(0);
	} else {
	    print "# The timer process $timer_pid launched, continuing testing...\n";
	    $TheEnd = time() + $waitfor;
	}
    } else {
	warn "$0: fork failed: $!\n";
    }
} else {
    print "# No timer process (need fork)\n";
}

my $xdefine = ''; 

if (open(XDEFINE, "xdefine")) {
    chomp($xdefine = <XDEFINE>);
    close(XDEFINE);
}

# Ideally, we'd like to test that the timers are rather precise.
# However, if the system is busy, there are no guarantees on how
# quickly we will return.  This limit used to be 10%, but that
# was occasionally triggered falsely.  
# Try 20%.  
# Another possibility might be to print "ok" if the test completes fine
# with (say) 10% slosh, "skip - system may have been busy?" if the test
# completes fine with (say) 30% slosh, and fail otherwise.  If you do that,
# consider changing over to test.pl at the same time.
# --A.D., Nov 27, 2001
my $limit = 0.20; # 20% is acceptable slosh for testing timers

sub skip {
    map { print "ok $_ # skipped\n" } @_;
}

sub ok {
    my ($n, $result, @info) = @_;
    if ($result) {
    	print "ok $n\n";
    }
    else {
	print "not ok $n\n";
    	print "# @info\n" if @info;
    }
}

unless ($have_gettimeofday) {
    skip 2..6;
}
else {
    my @one = gettimeofday();
    ok 2, @one == 2, 'gettimeofday returned ', 0+@one, ' args';
    ok 3, $one[0] > 850_000_000, "@one too small";

    sleep 1;

    my @two = gettimeofday();
    ok 4, ($two[0] > $one[0] || ($two[0] == $one[0] && $two[1] > $one[1])),
    	    "@two is not greater than @one";

    my $f = Time::HiRes::time();
    ok 5, $f > 850_000_000, "$f too small";
    ok 6, $f - $two[0] < 2, "$f - $two[0] >= 2";
}

unless ($have_usleep) {
    skip 7..8;
}
else {
    use Time::HiRes qw(usleep);
    my $one = time;
    usleep(10_000);
    my $two = time;
    usleep(10_000);
    my $three = time;
    ok 7, $one == $two || $two == $three, "slept too long, $one $two $three";

    unless ($have_gettimeofday) {
    	skip 8;
    }
    else {
    	my $f = Time::HiRes::time();
	usleep(500_000);
        my $f2 = Time::HiRes::time();
	my $d = $f2 - $f;
	ok 8, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
    }
}

# Two-arg tv_interval() is always available.
{
    my $f = tv_interval [5, 100_000], [10, 500_000];
    ok 9, abs($f - 5.4) < 0.001, $f;
}

unless ($have_gettimeofday) {
    skip 10;
}
else {
    my $r = [gettimeofday()];
    my $f = tv_interval $r;
    ok 10, $f < 2, $f;
}

unless ($have_usleep && $have_gettimeofday) {
    skip 11;
}
else {
    my $r = [ gettimeofday() ];
    Time::HiRes::sleep( 0.5 );
    my $f = tv_interval $r;
    ok 11, $f > 0.4 && $f < 0.9, "slept $f instead of 0.5 secs.";
}

unless ($have_ualarm && $have_alarm) {
    skip 12..13;
}
else {
    my $tick = 0;
    local $SIG{ ALRM } = sub { $tick++ };

    my $one = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
    my $two = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
    my $three = time;
    ok 12, $one == $two || $two == $three, "slept too long, $one $two $three";
    print "# tick = $tick, one = $one, two = $two, three = $three\n";

    $tick = 0; ualarm(10_000, 10_000); while ($tick < 3) { }
    ok 13, 1;
    ualarm(0);
    print "# tick = $tick, one = $one, two = $two, three = $three\n";
}

# Did we even get close?

unless ($have_gettimeofday) {
    skip 14;
} else {
 my ($s, $n, $i) = (0);
 for $i (1 .. 100) {
     $s += Time::HiRes::time() - time();
     $n++;
 }
 # $s should be, at worst, equal to $n
 # (time() may be rounding down, up, or closest)
 ok 14, abs($s) / $n <= 1.0, "Time::HiRes::time() not close to time()";
 print "# s = $s, n = $n, s/n = ", $s/$n, "\n";
}

my $has_ualarm = $Config{d_ualarm};

$has_ualarm ||= $xdefine =~ /-DHAS_UALARM/;

unless (   defined &Time::HiRes::gettimeofday
	&& defined &Time::HiRes::ualarm
	&& defined &Time::HiRes::usleep
	&& $has_ualarm) {
    for (15..17) {
	print "ok $_ # Skip: no gettimeofday or no ualarm or no usleep\n";
    }
} else {
    use Time::HiRes qw(time alarm sleep);

    my ($f, $r, $i, $not, $ok);

    $f = time; 
    print "# time...$f\n";
    print "ok 15\n";

    $r = [Time::HiRes::gettimeofday()];
    sleep (0.5);
    print "# sleep...", Time::HiRes::tv_interval($r), "\nok 16\n";

    $r = [Time::HiRes::gettimeofday()];
    $i = 5;
    $SIG{ALRM} = "tick";
    while ($i > 0)
    {
	alarm(0.3);
	select (undef, undef, undef, 3);
	my $ival = Time::HiRes::tv_interval ($r);
	print "# Select returned! $i $ival\n";
	print "# ", abs($ival/3 - 1), "\n";
	# Whether select() gets restarted after signals is
	# implementation dependent.  If it is restarted, we
	# will get about 3.3 seconds: 3 from the select, 0.3
	# from the alarm.  If this happens, let's just skip
	# this particular test.  --jhi
	if (abs($ival/3.3 - 1) < $limit) {
	    $ok = "Skip: your select() may get restarted by your SIGALRM (or just retry test)";
	    undef $not;
	    last;
	}
	my $exp = 0.3 * (5 - $i);
	# This test is more sensitive, so impose a softer limit.
	if (abs($ival/$exp - 1) > 3*$limit) {
	    my $ratio = abs($ival/$exp);
	    $not = "while: $exp sleep took $ival ratio $ratio";
	    last;
	}
	$ok = $i;
    }

    sub tick
    {
	$i--;
	my $ival = Time::HiRes::tv_interval ($r);
	print "# Tick! $i $ival\n";
	my $exp = 0.3 * (5 - $i);
	# This test is more sensitive, so impose a softer limit.
	if (abs($ival/$exp - 1) > 3*$limit) {
	    my $ratio = abs($ival/$exp);
	    $not = "tick: $exp sleep took $ival ratio $ratio";
	    $i = 0;
	}
    }

    alarm(0); # can't cancel usig %SIG

    print $not ? "not ok 17 # $not\n" : "ok 17 # $ok\n";
}

unless (   defined &Time::HiRes::setitimer
	&& defined &Time::HiRes::getitimer
	&& has_symbol('ITIMER_VIRTUAL')
	&& $Config{sig_name} =~ m/\bVTALRM\b/) {
    for (18..19) {
	print "ok $_ # Skip: no virtual interval timers\n";
    }
} else {
    use Time::HiRes qw(setitimer getitimer ITIMER_VIRTUAL);

    my $i = 3;
    my $r = [Time::HiRes::gettimeofday()];

    $SIG{VTALRM} = sub {
	$i ? $i-- : setitimer(&ITIMER_VIRTUAL, 0);
	print "# Tick! $i ", Time::HiRes::tv_interval($r), "\n";
    };	

    print "# setitimer: ", join(" ", setitimer(ITIMER_VIRTUAL, 0.5, 0.4)), "\n";

    # Assume interval timer granularity of $limit * 0.5 seconds.  Too bold?
    my $virt = getitimer(&ITIMER_VIRTUAL);
    print "not " unless defined $virt && abs($virt / 0.5) - 1 < $limit;
    print "ok 18\n";

    print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";

    while (getitimer(&ITIMER_VIRTUAL)) {
	my $j;
	for (1..1000) { $j++ } # Can't be unbreakable, must test getitimer().
    }

    print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";

    $virt = getitimer(&ITIMER_VIRTUAL);
    print "not " unless defined $virt && $virt == 0;
    print "ok 19\n";

    $SIG{VTALRM} = 'DEFAULT';
}

if ($have_gettimeofday &&
    $have_usleep) {
    use Time::HiRes qw(usleep);

    my ($t0, $td);

    my $sleep = 1.5; # seconds
    my $msg;

    $t0 = gettimeofday();
    $a = abs(sleep($sleep)        / $sleep         - 1.0);
    $td = gettimeofday() - $t0;
    my $ratio = 1.0 + $a;

    $msg = "$td went by while sleeping $sleep, ratio $ratio.\n";

    if ($td < $sleep * (1 + $limit)) {
	print $a < $limit ? "ok 20 # $msg" : "not ok 20 # $msg";
    } else {
	print "ok 20 # Skip: $msg";
    }

    $t0 = gettimeofday();
    $a = abs(usleep($sleep * 1E6) / ($sleep * 1E6) - 1.0);
    $td = gettimeofday() - $t0;
    $ratio = 1.0 + $a;

    $msg = "$td went by while sleeping $sleep, ratio $ratio.\n";

    if ($td < $sleep * (1 + $limit)) {
	print $a < $limit ? "ok 21 # $msg" : "not ok 21 # $msg";
    } else {
	print "ok 21 # Skip: $msg";
    }

} else {
    for (20..21) {
	print "ok $_ # Skip: no gettimeofday\n";
    }
}

unless ($have_nanosleep) {
    skip 22..23;
}
else {
    my $one = CORE::time;
    nanosleep(10_000_000);
    my $two = CORE::time;
    nanosleep(10_000_000);
    my $three = CORE::time;
    ok 22, $one == $two || $two == $three, "slept too long, $one $two $three";

    unless ($have_gettimeofday) {
    	skip 23;
    }
    else {
    	my $f = Time::HiRes::time();
	nanosleep(500_000_000);
        my $f2 = Time::HiRes::time();
	my $d = $f2 - $f;
	ok 23, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
    }
}

eval { sleep(-1) };
print $@ =~ /::sleep\(-1\): negative time not invented yet/ ?
    "ok 24\n" : "not ok 24\n";

eval { usleep(-2) };
print $@ =~ /::usleep\(-2\): negative time not invented yet/ ?
    "ok 25\n" : "not ok 25\n";

if ($have_ualarm) {
    eval { alarm(-3) };
    print $@ =~ /::alarm\(-3, 0\): negative time not invented yet/ ?
	"ok 26\n" : "not ok 26\n";

    eval { ualarm(-4) };
    print $@ =~ /::ualarm\(-4, 0\): negative time not invented yet/ ?
    "ok 27\n" : "not ok 27\n";
} else {
    skip 26;
    skip 27;
}

if ($have_nanosleep) {
    eval { nanosleep(-5) };
    print $@ =~ /::nanosleep\(-5\): negative time not invented yet/ ?
	"ok 28\n" : "not ok 28\n";
} else {
    skip 28;
}

if ($have_ualarm && $] >= 5.008001) {
    # http://groups.google.com/group/perl.perl5.porters/browse_thread/thread/adaffaaf939b042e/20dafc298df737f0%2320dafc298df737f0?sa=X&oi=groupsr&start=0&num=3
    # Perl changes [18765] and [18770], perl bug [perl #20920]

    # First we will find the loop size N (a for() loop 0..N-1)
    # that will take more than T seconds.

    my $T = 0.01;
    use Time::HiRes qw(time);
    my $N = 1024;
    my $i;
    N: {
	do {
	    my $t0 = time();
	    for ($i = 0; $i < $N; $i++) { }
	    my $t1 = time();
	    my $dt = $t1 - $t0;
	    print "# N = $N, t1 = $t1, t0 = $t0, dt = $dt\n";
	    last N if $dt > $T;
	    $N *= 2;
	} while (1);
    }

    # The time-burner which takes at least T seconds.
    my $F = sub {
	my $c = @_ ? shift : 1;
	my $n = $c * $N;
	my $i;
	for ($i = 0; $i < $n; $i++) { }
    };

    # Then we will setup a periodic timer (the two-argument alarm() of
    # Time::HiRes, behind the curtains the libc ualarm()) which has
    # a signal handler that takes so much time (on the first initial
    # invocation) that the first periodic invocation (second invocation)
    # will happen before the first invocation has finished.  In Perl 5.8.0
    # the "safe signals" concept was implemented, with unfortunately at least
    # one bug that caused a core dump on reentering the handler. This bug
    # was fixed by the time of Perl 5.8.1.

    # Do not try mixing sleep() and alarm() for testing this.

    my $a = 0; # Number of alarms we receive.
    my $A = 2; # Number of alarms we will handle before disarming.
               # (We may well get $A + 1 alarms.)

    $SIG{ALRM} = sub {
	$a++;
	print "# Alarm $a - ", time(), "\n";
	alarm(0) if $a >= $A; # Disarm the alarm.
	$F->(2); # Try burning CPU at least for 2T seconds.
    }; 

    use Time::HiRes qw(alarm); 
    alarm($T, $T);  # Arm the alarm.

    $F->(10); # Try burning CPU at least for 10T seconds.

    print "ok 29\n"; # Not core dumping by now is considered to be the success.
} else {
    skip 29;
}

if ($have_clock_gettime &&
    # All implementations of clock_gettime() 
    # are SUPPOSED TO support CLOCK_REALTIME.
    has_symbol('CLOCK_REALTIME')) {
    my $ok = 0;
 TRY: {
	for my $try (1..3) {
	    print "# CLOCK_REALTIME: try = $try\n";
	    my $t0 = clock_gettime(&CLOCK_REALTIME);
	    use Time::HiRes qw(sleep);
	    my $T = 1.5;
	    sleep($T);
	    my $t1 = clock_gettime(&CLOCK_REALTIME);
	    if ($t0 > 0 && $t1 > $t0) {
		print "# t1 = $t1, t0 = $t0\n";
		my $dt = $t1 - $t0;
		my $rt = abs(1 - $dt / $T);
		print "# dt = $dt, rt = $rt\n";
		if ($rt <= 2 * $limit) {
		    $ok = 1;
		    last TRY;
		}
	    } else {
		print "# Error: t0 = $t0, t1 = $t1\n";
	    }
	    my $r = rand() + rand();
	    printf "# Sleeping for %.6f seconds...\n";
	    sleep($r);
	}
    }
    if ($ok) {
	print "ok 30\n";
    } else {
	print "not ok 30\n";
    }
} else {
    print "# No clock_gettime\n";
    skip 30;
}

if ($have_clock_getres) {
    my $tr = clock_getres();
   if ($tr > 0) {
       print "ok 31 # tr = $tr\n";
   } else {
       print "not ok 31 # tr = $tr\n";
   }
} else {
    print "# No clock_getres\n";
    skip 31;
}

END {
    if (defined $timer_pid) {
	my $left = $TheEnd - time();
	printf "# I am the main process $$, terminating the timer process $timer_pid\n# before it terminates me in %d seconds (testing took %d seconds).\n", $left, $waitfor - $left;
	kill('TERM', $timer_pid); # We are done, the timer can go.
	unlink("ktrace.out"); # Used in BSD system call tracing.
	print "# All done.\n";
    }
}
Commit	Line	Data
88cb3de1	1	#!./perl -w
88cb3de1	2
dcf686c9	3	BEGIN {
3f2ee006	4	if ($ENV{PERL_CORE}) {
	5	chdir 't' if -d 't';
	6	@INC = '../lib';
df2f6354	7	require Config; import Config;
	8	if (" $Config{'extensions'} " !~ m[ Time/HiRes ]) {
	9	print "1..0 # Skip -- Perl configured without Time::HiRes module\n";
	10	exit 0;
	11	}
3f2ee006	12	}
dcf686c9	13	}
dcf686c9	14
ced84e60	15	BEGIN { $\| = 1; print "1..31\n"; }
dcf686c9	16
0cf8ddea	17	END { print "not ok 1\n" unless $loaded }
dcf686c9	18
	19	use Time::HiRes qw(tv_interval);
	20
	21	$loaded = 1;
	22
	23	print "ok 1\n";
	24
	25	use strict;
	26
ced84e60	27	my $have_gettimeofday = &Time::HiRes::d_gettimeofday;
	28	my $have_usleep = &Time::HiRes::d_usleep;
	29	my $have_nanosleep = &Time::HiRes::d_nanosleep;
	30	my $have_ualarm = &Time::HiRes::d_ualarm;
	31	my $have_clock_gettime = &Time::HiRes::d_clock_gettime;
	32	my $have_clock_getres = &Time::HiRes::d_clock_getres;
dcf686c9	33
b311af62	34	sub has_symbol {
b311af62	35	my $symbol = shift;
a5929ff3	36	eval "use Time::HiRes qw($symbol)";
b311af62	37	return 0 unless $@ eq '';
a5929ff3	38	eval "my \$a = $symbol";
a5929ff3	39	return $@ eq '';
b311af62	40	}
b311af62	41
ced84e60	42	printf "# have_gettimeofday = %d\n", $have_gettimeofday;
	43	printf "# have_usleep = %d\n", $have_usleep;
	44	printf "# have_nanosleep = %d\n", $have_nanosleep;
	45	printf "# have_ualarm = %d\n", $have_ualarm;
	46	printf "# have_clock_gettime = %d\n", $have_clock_gettime;
	47	printf "# have_clock_getres = %d\n", $have_clock_getres;
3d0346a5	48
dcf686c9	49	import Time::HiRes 'gettimeofday' if $have_gettimeofday;
dcf686c9	50	import Time::HiRes 'usleep' if $have_usleep;
44d3ce20	51	import Time::HiRes 'nanosleep' if $have_nanosleep;
dcf686c9	52	import Time::HiRes 'ualarm' if $have_ualarm;
ced84e60	53	import Time::HiRes 'clock_gettime' if $have_clock_gettime;
ced84e60	54	import Time::HiRes 'clock_getres' if $have_clock_getres;
dcf686c9	55
3c72ec00	56	use Config;
3c72ec00	57
82cbdcc3	58	use Time::HiRes qw(gettimeofday);
82cbdcc3	59
690f7c5f	60	my $have_alarm = $Config{d_alarm};
690f7c5f	61	my $have_fork = $Config{d_fork};
3d0346a5	62	my $waitfor = 60; # 10-20 seconds is normal (load affects this).
3d0346a5	63	my $timer_pid;
b311af62	64	my $TheEnd;
690f7c5f	65
690f7c5f	66	if ($have_fork) {
3d0346a5	67	print "# I am the main process $$, starting the timer process...\n";
	68	$timer_pid = fork();
	69	if (defined $timer_pid) {
	70	if ($timer_pid == 0) { # We are the kid, set up the timer.
	71	print "# I am the timer process $$, sleeping for $waitfor seconds...\n";
690f7c5f	72	sleep($waitfor);
3d0346a5	73	warn "\n$0: overall time allowed for tests (${waitfor}s) exceeded!\n";
3d0346a5	74	print "# Terminating the main process...\n";
690f7c5f	75	kill('TERM', getppid());
3d0346a5	76	print "# This is the timer process $$, over and out.\n";
690f7c5f	77	exit(0);
3d0346a5	78	} else {
b311af62	79	print "# The timer process $timer_pid launched, continuing testing...\n";
b311af62	80	$TheEnd = time() + $waitfor;
690f7c5f	81	}
	82	} else {
	83	warn "$0: fork failed: $!\n";
	84	}
	85	} else {
3d0346a5	86	print "# No timer process (need fork)\n";
690f7c5f	87	}
690f7c5f	88
12724655	89	my $xdefine = '';
3f2ee006	90
	91	if (open(XDEFINE, "xdefine")) {
	92	chomp($xdefine = <XDEFINE>);
	93	close(XDEFINE);
	94	}
	95
0740bb5b	96	# Ideally, we'd like to test that the timers are rather precise.
	97	# However, if the system is busy, there are no guarantees on how
	98	# quickly we will return. This limit used to be 10%, but that
	99	# was occasionally triggered falsely.
	100	# Try 20%.
	101	# Another possibility might be to print "ok" if the test completes fine
	102	# with (say) 10% slosh, "skip - system may have been busy?" if the test
	103	# completes fine with (say) 30% slosh, and fail otherwise. If you do that,
	104	# consider changing over to test.pl at the same time.
	105	# --A.D., Nov 27, 2001
	106	my $limit = 0.20; # 20% is acceptable slosh for testing timers
	107
dcf686c9	108	sub skip {
3f2ee006	109	map { print "ok $_ # skipped\n" } @_;
dcf686c9	110	}
	111
	112	sub ok {
	113	my ($n, $result, @info) = @_;
	114	if ($result) {
	115	print "ok $n\n";
	116	}
	117	else {
	118	print "not ok $n\n";
	119	print "# @info\n" if @info;
	120	}
	121	}
	122
3d0346a5	123	unless ($have_gettimeofday) {
dcf686c9	124	skip 2..6;
	125	}
	126	else {
	127	my @one = gettimeofday();
	128	ok 2, @one == 2, 'gettimeofday returned ', 0+@one, ' args';
	129	ok 3, $one[0] > 850_000_000, "@one too small";
	130
	131	sleep 1;
	132
	133	my @two = gettimeofday();
	134	ok 4, ($two[0] > $one[0] \|\| ($two[0] == $one[0] && $two[1] > $one[1])),
	135	"@two is not greater than @one";
	136
c9ff6e92	137	my $f = Time::HiRes::time();
dcf686c9	138	ok 5, $f > 850_000_000, "$f too small";
0740bb5b	139	ok 6, $f - $two[0] < 2, "$f - $two[0] >= 2";
dcf686c9	140	}
dcf686c9	141
3d0346a5	142	unless ($have_usleep) {
dcf686c9	143	skip 7..8;
	144	}
	145	else {
82cbdcc3	146	use Time::HiRes qw(usleep);
dcf686c9	147	my $one = time;
	148	usleep(10_000);
	149	my $two = time;
	150	usleep(10_000);
	151	my $three = time;
	152	ok 7, $one == $two \|\| $two == $three, "slept too long, $one $two $three";
	153
3d0346a5	154	unless ($have_gettimeofday) {
dcf686c9	155	skip 8;
	156	}
	157	else {
c9ff6e92	158	my $f = Time::HiRes::time();
dcf686c9	159	usleep(500_000);
c9ff6e92	160	my $f2 = Time::HiRes::time();
dcf686c9	161	my $d = $f2 - $f;
0740bb5b	162	ok 8, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
dcf686c9	163	}
	164	}
	165
	166	# Two-arg tv_interval() is always available.
	167	{
	168	my $f = tv_interval [5, 100_000], [10, 500_000];
6cf89afa	169	ok 9, abs($f - 5.4) < 0.001, $f;
dcf686c9	170	}
dcf686c9	171
3d0346a5	172	unless ($have_gettimeofday) {
dcf686c9	173	skip 10;
	174	}
	175	else {
	176	my $r = [gettimeofday()];
	177	my $f = tv_interval $r;
	178	ok 10, $f < 2, $f;
	179	}
	180
3d0346a5	181	unless ($have_usleep && $have_gettimeofday) {
dcf686c9	182	skip 11;
	183	}
	184	else {
82cbdcc3	185	my $r = [ gettimeofday() ];
dcf686c9	186	Time::HiRes::sleep( 0.5 );
dcf686c9	187	my $f = tv_interval $r;
0740bb5b	188	ok 11, $f > 0.4 && $f < 0.9, "slept $f instead of 0.5 secs.";
dcf686c9	189	}
dcf686c9	190
3d0346a5	191	unless ($have_ualarm && $have_alarm) {
dcf686c9	192	skip 12..13;
	193	}
	194	else {
	195	my $tick = 0;
64a7a97c	196	local $SIG{ ALRM } = sub { $tick++ };
dcf686c9	197
64a7a97c	198	my $one = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
64a7a97c	199	my $two = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
dcf686c9	200	my $three = time;
dcf686c9	201	ok 12, $one == $two \|\| $two == $three, "slept too long, $one $two $three";
64a7a97c	202	print "# tick = $tick, one = $one, two = $two, three = $three\n";
dcf686c9	203
64a7a97c	204	$tick = 0; ualarm(10_000, 10_000); while ($tick < 3) { }
dcf686c9	205	ok 13, 1;
dcf686c9	206	ualarm(0);
64a7a97c	207	print "# tick = $tick, one = $one, two = $two, three = $three\n";
dcf686c9	208	}
dcf686c9	209
64a7a97c	210	# Did we even get close?
dcf686c9	211
ced84e60	212	unless ($have_gettimeofday) {
64a7a97c	213	skip 14;
c9ff6e92	214	} else {
1fbb4de4	215	my ($s, $n, $i) = (0);
1fbb4de4	216	for $i (1 .. 100) {
456811e8	217	$s += Time::HiRes::time() - time();
456811e8	218	$n++;
64cc9c1c	219	}
456811e8	220	# $s should be, at worst, equal to $n
	221	# (time() may be rounding down, up, or closest)
	222	ok 14, abs($s) / $n <= 1.0, "Time::HiRes::time() not close to time()";
	223	print "# s = $s, n = $n, s/n = ", $s/$n, "\n";
dcf686c9	224	}
dcf686c9	225
3f2ee006	226	my $has_ualarm = $Config{d_ualarm};
	227
	228	$has_ualarm \|\|= $xdefine =~ /-DHAS_UALARM/;
	229
	230	unless ( defined &Time::HiRes::gettimeofday
dcf686c9	231	&& defined &Time::HiRes::ualarm
c7f7de79	232	&& defined &Time::HiRes::usleep
3f2ee006	233	&& $has_ualarm) {
dcf686c9	234	for (15..17) {
3f2ee006	235	print "ok $_ # Skip: no gettimeofday or no ualarm or no usleep\n";
dcf686c9	236	}
dcf686c9	237	} else {
ced84e60	238	use Time::HiRes qw(time alarm sleep);
dcf686c9	239
cb203acc	240	my ($f, $r, $i, $not, $ok);
dcf686c9	241
dcf686c9	242	$f = time;
add58217	243	print "# time...$f\n";
add58217	244	print "ok 15\n";
dcf686c9	245
c9ff6e92	246	$r = [Time::HiRes::gettimeofday()];
dcf686c9	247	sleep (0.5);
add58217	248	print "# sleep...", Time::HiRes::tv_interval($r), "\nok 16\n";
dcf686c9	249
c9ff6e92	250	$r = [Time::HiRes::gettimeofday()];
dcf686c9	251	$i = 5;
dcf686c9	252	$SIG{ALRM} = "tick";
6ea166ef	253	while ($i > 0)
dcf686c9	254	{
0e172911	255	alarm(0.3);
c7f7de79	256	select (undef, undef, undef, 3);
	257	my $ival = Time::HiRes::tv_interval ($r);
	258	print "# Select returned! $i $ival\n";
cb203acc	259	print "# ", abs($ival/3 - 1), "\n";
	260	# Whether select() gets restarted after signals is
	261	# implementation dependent. If it is restarted, we
	262	# will get about 3.3 seconds: 3 from the select, 0.3
	263	# from the alarm. If this happens, let's just skip
	264	# this particular test. --jhi
	265	if (abs($ival/3.3 - 1) < $limit) {
3f2ee006	266	$ok = "Skip: your select() may get restarted by your SIGALRM (or just retry test)";
cb203acc	267	undef $not;
	268	last;
	269	}
c7f7de79	270	my $exp = 0.3 * (5 - $i);
0740bb5b	271	# This test is more sensitive, so impose a softer limit.
cb203acc	272	if (abs($ival/$exp - 1) > 3*$limit) {
0740bb5b	273	my $ratio = abs($ival/$exp);
0740bb5b	274	$not = "while: $exp sleep took $ival ratio $ratio";
c7f7de79	275	last;
c7f7de79	276	}
cb203acc	277	$ok = $i;
dcf686c9	278	}
	279
	280	sub tick
	281	{
dcf686c9	282	$i--;
c7f7de79	283	my $ival = Time::HiRes::tv_interval ($r);
	284	print "# Tick! $i $ival\n";
	285	my $exp = 0.3 * (5 - $i);
0740bb5b	286	# This test is more sensitive, so impose a softer limit.
cb203acc	287	if (abs($ival/$exp - 1) > 3*$limit) {
0740bb5b	288	my $ratio = abs($ival/$exp);
0740bb5b	289	$not = "tick: $exp sleep took $ival ratio $ratio";
c7f7de79	290	$i = 0;
c7f7de79	291	}
dcf686c9	292	}
c7f7de79	293
d0b83b2b	294	alarm(0); # can't cancel usig %SIG
dcf686c9	295
cb203acc	296	print $not ? "not ok 17 # $not\n" : "ok 17 # $ok\n";
dcf686c9	297	}
dcf686c9	298
3f2ee006	299	unless ( defined &Time::HiRes::setitimer
3c72ec00	300	&& defined &Time::HiRes::getitimer
b311af62	301	&& has_symbol('ITIMER_VIRTUAL')
d0b83b2b	302	&& $Config{sig_name} =~ m/\bVTALRM\b/) {
3c72ec00	303	for (18..19) {
0e172911	304	print "ok $_ # Skip: no virtual interval timers\n";
3c72ec00	305	}
3c72ec00	306	} else {
b311af62	307	use Time::HiRes qw(setitimer getitimer ITIMER_VIRTUAL);
3c72ec00	308
3c72ec00	309	my $i = 3;
c9ff6e92	310	my $r = [Time::HiRes::gettimeofday()];
3c72ec00	311
3c72ec00	312	$SIG{VTALRM} = sub {
b311af62	313	$i ? $i-- : setitimer(&ITIMER_VIRTUAL, 0);
3c72ec00	314	print "# Tick! $i ", Time::HiRes::tv_interval($r), "\n";
	315	};
	316
0e172911	317	print "# setitimer: ", join(" ", setitimer(ITIMER_VIRTUAL, 0.5, 0.4)), "\n";
0e172911	318
0740bb5b	319	# Assume interval timer granularity of $limit * 0.5 seconds. Too bold?
b311af62	320	my $virt = getitimer(&ITIMER_VIRTUAL);
4ed0e2d4	321	print "not " unless defined $virt && abs($virt / 0.5) - 1 < $limit;
0e172911	322	print "ok 18\n";
3c72ec00	323
	324	print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";
	325
b311af62	326	while (getitimer(&ITIMER_VIRTUAL)) {
3f2ee006	327	my $j;
3f2ee006	328	for (1..1000) { $j++ } # Can't be unbreakable, must test getitimer().
3c72ec00	329	}
	330
	331	print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";
	332
b311af62	333	$virt = getitimer(&ITIMER_VIRTUAL);
4ed0e2d4	334	print "not " unless defined $virt && $virt == 0;
0e172911	335	print "ok 19\n";
0e172911	336
3c72ec00	337	$SIG{VTALRM} = 'DEFAULT';
	338	}
	339
82cbdcc3	340	if ($have_gettimeofday &&
	341	$have_usleep) {
	342	use Time::HiRes qw(usleep);
	343
9c735d59	344	my ($t0, $td);
52d72fba	345
9c735d59	346	my $sleep = 1.5; # seconds
9c735d59	347	my $msg;
	348
	349	$t0 = gettimeofday();
	350	$a = abs(sleep($sleep) / $sleep - 1.0);
	351	$td = gettimeofday() - $t0;
0740bb5b	352	my $ratio = 1.0 + $a;
9c735d59	353
0740bb5b	354	$msg = "$td went by while sleeping $sleep, ratio $ratio.\n";
9c735d59	355
	356	if ($td < $sleep * (1 + $limit)) {
	357	print $a < $limit ? "ok 20 # $msg" : "not ok 20 # $msg";
	358	} else {
	359	print "ok 20 # Skip: $msg";
	360	}
	361
	362	$t0 = gettimeofday();
	363	$a = abs(usleep($sleep * 1E6) / ($sleep * 1E6) - 1.0);
	364	$td = gettimeofday() - $t0;
0740bb5b	365	$ratio = 1.0 + $a;
9c735d59	366
0740bb5b	367	$msg = "$td went by while sleeping $sleep, ratio $ratio.\n";
9c735d59	368
	369	if ($td < $sleep * (1 + $limit)) {
	370	print $a < $limit ? "ok 21 # $msg" : "not ok 21 # $msg";
	371	} else {
	372	print "ok 21 # Skip: $msg";
	373	}
	374
	375	} else {
	376	for (20..21) {
	377	print "ok $_ # Skip: no gettimeofday\n";
	378	}
	379	}
52d72fba	380
3d0346a5	381	unless ($have_nanosleep) {
44d3ce20	382	skip 22..23;
	383	}
	384	else {
	385	my $one = CORE::time;
	386	nanosleep(10_000_000);
	387	my $two = CORE::time;
	388	nanosleep(10_000_000);
	389	my $three = CORE::time;
	390	ok 22, $one == $two \|\| $two == $three, "slept too long, $one $two $three";
	391
3d0346a5	392	unless ($have_gettimeofday) {
44d3ce20	393	skip 23;
	394	}
	395	else {
	396	my $f = Time::HiRes::time();
	397	nanosleep(500_000_000);
	398	my $f2 = Time::HiRes::time();
	399	my $d = $f2 - $f;
	400	ok 23, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
	401	}
	402	}
	403
f7916ddb	404	eval { sleep(-1) };
f7916ddb	405	print $@ =~ /::sleep\(-1\): negative time not invented yet/ ?
44d3ce20	406	"ok 24\n" : "not ok 24\n";
f7916ddb	407
	408	eval { usleep(-2) };
	409	print $@ =~ /::usleep\(-2\): negative time not invented yet/ ?
44d3ce20	410	"ok 25\n" : "not ok 25\n";
f7916ddb	411
ec77158c	412	if ($have_ualarm) {
c46d5038	413	eval { alarm(-3) };
c46d5038	414	print $@ =~ /::alarm\(-3, 0\): negative time not invented yet/ ?
44d3ce20	415	"ok 26\n" : "not ok 26\n";
c46d5038	416
ec77158c	417	eval { ualarm(-4) };
ec77158c	418	print $@ =~ /::ualarm\(-4, 0\): negative time not invented yet/ ?
44d3ce20	419	"ok 27\n" : "not ok 27\n";
	420	} else {
	421	skip 26;
	422	skip 27;
	423	}
	424
	425	if ($have_nanosleep) {
	426	eval { nanosleep(-5) };
	427	print $@ =~ /::nanosleep\(-5\): negative time not invented yet/ ?
	428	"ok 28\n" : "not ok 28\n";
ec77158c	429	} else {
44d3ce20	430	skip 28;
ec77158c	431	}
690f7c5f	432
3d0346a5	433	if ($have_ualarm && $] >= 5.008001) {
	434	# http://groups.google.com/group/perl.perl5.porters/browse_thread/thread/adaffaaf939b042e/20dafc298df737f0%2320dafc298df737f0?sa=X&oi=groupsr&start=0&num=3
	435	# Perl changes [18765] and [18770], perl bug [perl #20920]
ced84e60	436
	437	# First we will find the loop size N (a for() loop 0..N-1)
	438	# that will take more than T seconds.
	439
	440	my $T = 0.01;
	441	use Time::HiRes qw(time);
	442	my $N = 1024;
	443	my $i;
	444	N: {
	445	do {
	446	my $t0 = time();
	447	for ($i = 0; $i < $N; $i++) { }
	448	my $t1 = time();
	449	my $dt = $t1 - $t0;
	450	print "# N = $N, t1 = $t1, t0 = $t0, dt = $dt\n";
	451	last N if $dt > $T;
	452	$N *= 2;
	453	} while (1);
	454	}
	455
	456	# The time-burner which takes at least T seconds.
	457	my $F = sub {
	458	my $c = @_ ? shift : 1;
	459	my $n = $c * $N;
	460	my $i;
	461	for ($i = 0; $i < $n; $i++) { }
	462	};
	463
	464	# Then we will setup a periodic timer (the two-argument alarm() of
	465	# Time::HiRes, behind the curtains the libc ualarm()) which has
	466	# a signal handler that takes so much time (on the first initial
	467	# invocation) that the first periodic invocation (second invocation)
	468	# will happen before the first invocation has finished. In Perl 5.8.0
	469	# the "safe signals" concept was implemented, with unfortunately at least
	470	# one bug that caused a core dump on reentering the handler. This bug
	471	# was fixed by the time of Perl 5.8.1.
	472
b311af62	473	# Do not try mixing sleep() and alarm() for testing this.
b311af62	474
ced84e60	475	my $a = 0; # Number of alarms we receive.
	476	my $A = 2; # Number of alarms we will handle before disarming.
	477	# (We may well get $A + 1 alarms.)
	478
	479	$SIG{ALRM} = sub {
	480	$a++;
	481	print "# Alarm $a - ", time(), "\n";
	482	alarm(0) if $a >= $A; # Disarm the alarm.
	483	$F->(2); # Try burning CPU at least for 2T seconds.
	484	};
	485
3d0346a5	486	use Time::HiRes qw(alarm);
ced84e60	487	alarm($T, $T); # Arm the alarm.
	488
	489	$F->(10); # Try burning CPU at least for 10T seconds.
	490
3d0346a5	491	print "ok 29\n"; # Not core dumping by now is considered to be the success.
	492	} else {
	493	skip 29;
	494	}
	495
b311af62	496	if ($have_clock_gettime &&
	497	# All implementations of clock_gettime()
	498	# are SUPPOSED TO support CLOCK_REALTIME.
	499	has_symbol('CLOCK_REALTIME')) {
a5929ff3	500	my $ok = 0;
	501	TRY: {
	502	for my $try (1..3) {
	503	print "# CLOCK_REALTIME: try = $try\n";
	504	my $t0 = clock_gettime(&CLOCK_REALTIME);
	505	use Time::HiRes qw(sleep);
	506	my $T = 1.5;
	507	sleep($T);
	508	my $t1 = clock_gettime(&CLOCK_REALTIME);
	509	if ($t0 > 0 && $t1 > $t0) {
	510	print "# t1 = $t1, t0 = $t0\n";
	511	my $dt = $t1 - $t0;
	512	my $rt = abs(1 - $dt / $T);
	513	print "# dt = $dt, rt = $rt\n";
	514	if ($rt <= 2 * $limit) {
	515	$ok = 1;
	516	last TRY;
	517	}
	518	} else {
	519	print "# Error: t0 = $t0, t1 = $t1\n";
	520	}
	521	my $r = rand() + rand();
	522	printf "# Sleeping for %.6f seconds...\n";
	523	sleep($r);
ced84e60	524	}
a5929ff3	525	}
	526	if ($ok) {
	527	print "ok 30\n";
ced84e60	528	} else {
a5929ff3	529	print "not ok 30\n";
ced84e60	530	}
	531	} else {
	532	print "# No clock_gettime\n";
	533	skip 30;
	534	}
	535
	536	if ($have_clock_getres) {
	537	my $tr = clock_getres();
	538	if ($tr > 0) {
	539	print "ok 31 # tr = $tr\n";
	540	} else {
	541	print "not ok 31 # tr = $tr\n";
	542	}
	543	} else {
	544	print "# No clock_getres\n";
	545	skip 31;
	546	}
	547
3d0346a5	548	END {
3d0346a5	549	if (defined $timer_pid) {
b311af62	550	my $left = $TheEnd - time();
b311af62	551	printf "# I am the main process $$, terminating the timer process $timer_pid\n# before it terminates me in %d seconds (testing took %d seconds).\n", $left, $waitfor - $left;
3d0346a5	552	kill('TERM', $timer_pid); # We are done, the timer can go.
	553	unlink("ktrace.out"); # Used in BSD system call tracing.
	554	print "# All done.\n";
	555	}
690f7c5f	556	}
690f7c5f	557