7 require Config; import Config;
8 if (" $Config{'extensions'} " !~ m[ Time/HiRes ]) {
9 print "1..0 # Skip -- Perl configured without Time::HiRes module\n";
15 BEGIN { $| = 1; print "1..40\n"; }
17 END { print "not ok 1\n" unless $loaded }
19 use Time::HiRes 1.9704; # Remember to bump this once in a while.
20 use Time::HiRes qw(tv_interval);
28 my $have_gettimeofday = &Time::HiRes::d_gettimeofday;
29 my $have_usleep = &Time::HiRes::d_usleep;
30 my $have_nanosleep = &Time::HiRes::d_nanosleep;
31 my $have_ualarm = &Time::HiRes::d_ualarm;
32 my $have_clock_gettime = &Time::HiRes::d_clock_gettime;
33 my $have_clock_getres = &Time::HiRes::d_clock_getres;
34 my $have_clock_nanosleep = &Time::HiRes::d_clock_nanosleep;
35 my $have_clock = &Time::HiRes::d_clock;
36 my $have_hires_stat = &Time::HiRes::d_hires_stat;
40 eval "use Time::HiRes qw($symbol)";
41 return 0 unless $@ eq '';
42 eval "my \$a = $symbol";
46 printf "# have_gettimeofday = %d\n", $have_gettimeofday;
47 printf "# have_usleep = %d\n", $have_usleep;
48 printf "# have_nanosleep = %d\n", $have_nanosleep;
49 printf "# have_ualarm = %d\n", $have_ualarm;
50 printf "# have_clock_gettime = %d\n", $have_clock_gettime;
51 printf "# have_clock_getres = %d\n", $have_clock_getres;
52 printf "# have_clock_nanosleep = %d\n", $have_clock_nanosleep;
53 printf "# have_clock = %d\n", $have_clock;
54 printf "# have_hires_stat = %d\n", $have_hires_stat;
56 import Time::HiRes 'gettimeofday' if $have_gettimeofday;
57 import Time::HiRes 'usleep' if $have_usleep;
58 import Time::HiRes 'nanosleep' if $have_nanosleep;
59 import Time::HiRes 'ualarm' if $have_ualarm;
60 import Time::HiRes 'clock_gettime' if $have_clock_gettime;
61 import Time::HiRes 'clock_getres' if $have_clock_getres;
62 import Time::HiRes 'clock_nanosleep' if $have_clock_nanosleep;
63 import Time::HiRes 'clock' if $have_clock;
67 use Time::HiRes qw(gettimeofday);
69 my $have_alarm = $Config{d_alarm};
70 my $have_fork = $Config{d_fork};
71 my $waitfor = 360; # 30-45 seconds is normal (load affects this).
76 print "# I am the main process $$, starting the timer process...\n";
78 if (defined $timer_pid) {
79 if ($timer_pid == 0) { # We are the kid, set up the timer.
81 print "# I am the timer process $$, sleeping for $waitfor seconds...\n";
82 sleep($waitfor - 2); # Workaround for perlbug #49073
83 sleep(2); # Wait for parent to exit
84 if (kill(0, $ppid)) { # Check if parent still exists
85 warn "\n$0: overall time allowed for tests (${waitfor}s) exceeded!\n";
86 print "# Terminating main process $ppid...\n";
88 print "# This is the timer process $$, over and out.\n";
92 print "# The timer process $timer_pid launched, continuing testing...\n";
93 $TheEnd = time() + $waitfor;
96 warn "$0: fork failed: $!\n";
99 print "# No timer process (need fork)\n";
104 if (open(XDEFINE, "xdefine")) {
105 chomp($xdefine = <XDEFINE>);
109 # Ideally, we'd like to test that the timers are rather precise.
110 # However, if the system is busy, there are no guarantees on how
111 # quickly we will return. This limit used to be 10%, but that
112 # was occasionally triggered falsely.
114 # Another possibility might be to print "ok" if the test completes fine
115 # with (say) 10% slosh, "skip - system may have been busy?" if the test
116 # completes fine with (say) 30% slosh, and fail otherwise. If you do that,
117 # consider changing over to test.pl at the same time.
118 # --A.D., Nov 27, 2001
119 my $limit = 0.25; # 25% is acceptable slosh for testing timers
122 map { print "ok $_ # skipped\n" } @_;
126 my ($n, $result, @info) = @_;
132 print "# @info\n" if @info;
136 unless ($have_gettimeofday) {
140 my @one = gettimeofday();
141 ok 2, @one == 2, 'gettimeofday returned ', 0+@one, ' args';
142 ok 3, $one[0] > 850_000_000, "@one too small";
146 my @two = gettimeofday();
147 ok 4, ($two[0] > $one[0] || ($two[0] == $one[0] && $two[1] > $one[1])),
148 "@two is not greater than @one";
150 my $f = Time::HiRes::time();
151 ok 5, $f > 850_000_000, "$f too small";
152 ok 6, $f - $two[0] < 2, "$f - $two[0] >= 2";
155 unless ($have_usleep) {
159 use Time::HiRes qw(usleep);
165 ok 7, $one == $two || $two == $three, "slept too long, $one $two $three";
167 unless ($have_gettimeofday) {
171 my $f = Time::HiRes::time();
173 my $f2 = Time::HiRes::time();
175 ok 8, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
179 # Two-arg tv_interval() is always available.
181 my $f = tv_interval [5, 100_000], [10, 500_000];
182 ok 9, abs($f - 5.4) < 0.001, $f;
185 unless ($have_gettimeofday) {
189 my $r = [gettimeofday()];
190 my $f = tv_interval $r;
194 unless ($have_usleep && $have_gettimeofday) {
198 my $r = [ gettimeofday() ];
199 Time::HiRes::sleep( 0.5 );
200 my $f = tv_interval $r;
201 ok 11, $f > 0.4 && $f < 0.9, "slept $f instead of 0.5 secs.";
204 unless ($have_ualarm && $have_alarm) {
209 local $SIG{ ALRM } = sub { $tick++ };
211 my $one = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
212 my $two = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
214 ok 12, $one == $two || $two == $three, "slept too long, $one $two $three";
215 print "# tick = $tick, one = $one, two = $two, three = $three\n";
217 $tick = 0; ualarm(10_000, 10_000); while ($tick < 3) { }
220 print "# tick = $tick, one = $one, two = $two, three = $three\n";
223 # Did we even get close?
225 unless ($have_gettimeofday) {
228 my ($s, $n, $i) = (0);
230 $s += Time::HiRes::time() - time();
233 # $s should be, at worst, equal to $n
234 # (time() may be rounding down, up, or closest),
235 # but allow 10% of slop.
236 ok 14, abs($s) / $n <= 1.10, "Time::HiRes::time() not close to time()";
237 print "# s = $s, n = $n, s/n = ", abs($s)/$n, "\n";
240 my $has_ualarm = $Config{d_ualarm};
242 $has_ualarm ||= $xdefine =~ /-DHAS_UALARM/;
244 my $can_subsecond_alarm =
245 defined &Time::HiRes::gettimeofday &&
246 defined &Time::HiRes::ualarm &&
247 defined &Time::HiRes::usleep &&
250 unless ($can_subsecond_alarm) {
252 print "ok $_ # Skip: no gettimeofday or no ualarm or no usleep\n";
255 use Time::HiRes qw(time alarm sleep);
256 eval { require POSIX };
258 !$@ && defined &POSIX::sigaction && &POSIX::SIGALRM > 0;
260 my ($f, $r, $i, $not, $ok);
263 print "# time...$f\n";
266 $r = [Time::HiRes::gettimeofday()];
268 print "# sleep...", Time::HiRes::tv_interval($r), "\nok 16\n";
270 $r = [Time::HiRes::gettimeofday()];
273 if ($use_sigaction) {
274 $oldaction = new POSIX::SigAction;
275 printf "# sigaction tick, ALRM = %d\n", &POSIX::SIGALRM;
277 # Perl's deferred signals may be too wimpy to break through
278 # a restartable select(), so use POSIX::sigaction if available.
280 POSIX::sigaction(&POSIX::SIGALRM,
281 POSIX::SigAction->new("tick"),
283 or die "Error setting SIGALRM handler with sigaction: $!\n";
285 print "# SIG tick\n";
289 # On VMS timers can not interrupt select.
291 $ok = "Skip: VMS select() does not get interrupted.";
295 select (undef, undef, undef, 3);
296 my $ival = Time::HiRes::tv_interval ($r);
297 print "# Select returned! $i $ival\n";
298 print "# ", abs($ival/3 - 1), "\n";
299 # Whether select() gets restarted after signals is
300 # implementation dependent. If it is restarted, we
301 # will get about 3.3 seconds: 3 from the select, 0.3
302 # from the alarm. If this happens, let's just skip
303 # this particular test. --jhi
304 if (abs($ival/3.3 - 1) < $limit) {
305 $ok = "Skip: your select() may get restarted by your SIGALRM (or just retry test)";
309 my $exp = 0.3 * (5 - $i);
311 $not = "while: divisor became zero";
314 # This test is more sensitive, so impose a softer limit.
315 if (abs($ival/$exp - 1) > 4*$limit) {
316 my $ratio = abs($ival/$exp);
317 $not = "while: $exp sleep took $ival ratio $ratio";
326 my $ival = Time::HiRes::tv_interval ($r);
327 print "# Tick! $i $ival\n";
328 my $exp = 0.3 * (5 - $i);
330 $not = "tick: divisor became zero";
333 # This test is more sensitive, so impose a softer limit.
334 if (abs($ival/$exp - 1) > 4*$limit) {
335 my $ratio = abs($ival/$exp);
336 $not = "tick: $exp sleep took $ival ratio $ratio";
341 if ($use_sigaction) {
342 POSIX::sigaction(&POSIX::SIGALRM, $oldaction);
344 alarm(0); # can't cancel usig %SIG
347 print $not ? "not ok 17 # $not\n" : "ok 17 # $ok\n";
350 unless (defined &Time::HiRes::setitimer
351 && defined &Time::HiRes::getitimer
352 && has_symbol('ITIMER_VIRTUAL')
353 && $Config{sig_name} =~ m/\bVTALRM\b/
354 && $^O ne 'nto' # nto: QNX 6 has the API but no implementation
355 && $^O ne 'haiku' # haiku: has the API but no implementation
358 print "ok $_ # Skip: no virtual interval timers\n";
361 use Time::HiRes qw(setitimer getitimer ITIMER_VIRTUAL);
364 my $r = [Time::HiRes::gettimeofday()];
367 $i ? $i-- : setitimer(&ITIMER_VIRTUAL, 0);
368 print "# Tick! $i ", Time::HiRes::tv_interval($r), "\n";
371 print "# setitimer: ", join(" ", setitimer(ITIMER_VIRTUAL, 0.5, 0.4)), "\n";
373 # Assume interval timer granularity of $limit * 0.5 seconds. Too bold?
374 my $virt = getitimer(&ITIMER_VIRTUAL);
375 print "not " unless defined $virt && abs($virt / 0.5) - 1 < $limit;
378 print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";
380 while (getitimer(&ITIMER_VIRTUAL)) {
382 for (1..1000) { $j++ } # Can't be unbreakable, must test getitimer().
385 print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";
387 $virt = getitimer(&ITIMER_VIRTUAL);
388 print "not " unless defined $virt && $virt == 0;
391 $SIG{VTALRM} = 'DEFAULT';
394 if ($have_gettimeofday &&
396 use Time::HiRes qw(usleep);
400 my $sleep = 1.5; # seconds
403 $t0 = gettimeofday();
404 $a = abs(sleep($sleep) / $sleep - 1.0);
405 $td = gettimeofday() - $t0;
406 my $ratio = 1.0 + $a;
408 $msg = "$td went by while sleeping $sleep, ratio $ratio.\n";
410 if ($td < $sleep * (1 + $limit)) {
411 print $a < $limit ? "ok 20 # $msg" : "not ok 20 # $msg";
413 print "ok 20 # Skip: $msg";
416 $t0 = gettimeofday();
417 $a = abs(usleep($sleep * 1E6) / ($sleep * 1E6) - 1.0);
418 $td = gettimeofday() - $t0;
421 $msg = "$td went by while sleeping $sleep, ratio $ratio.\n";
423 if ($td < $sleep * (1 + $limit)) {
424 print $a < $limit ? "ok 21 # $msg" : "not ok 21 # $msg";
426 print "ok 21 # Skip: $msg";
431 print "ok $_ # Skip: no gettimeofday\n";
435 unless ($have_nanosleep) {
439 my $one = CORE::time;
440 nanosleep(10_000_000);
441 my $two = CORE::time;
442 nanosleep(10_000_000);
443 my $three = CORE::time;
444 ok 22, $one == $two || $two == $three, "slept too long, $one $two $three";
446 unless ($have_gettimeofday) {
450 my $f = Time::HiRes::time();
451 nanosleep(500_000_000);
452 my $f2 = Time::HiRes::time();
454 ok 23, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
459 print $@ =~ /::sleep\(-1\): negative time not invented yet/ ?
460 "ok 24\n" : "not ok 24\n";
463 print $@ =~ /::usleep\(-2\): negative time not invented yet/ ?
464 "ok 25\n" : "not ok 25\n";
468 print $@ =~ /::alarm\(-3, 0\): negative time not invented yet/ ?
469 "ok 26\n" : "not ok 26\n";
472 print $@ =~ /::ualarm\(-4, 0\): negative time not invented yet/ ?
473 "ok 27\n" : "not ok 27\n";
479 if ($have_nanosleep) {
480 eval { nanosleep(-5) };
481 print $@ =~ /::nanosleep\(-5\): negative time not invented yet/ ?
482 "ok 28\n" : "not ok 28\n";
487 # Find the loop size N (a for() loop 0..N-1)
488 # that will take more than T seconds.
490 if ($have_ualarm && $] >= 5.008001) {
491 # http://groups.google.com/group/perl.perl5.porters/browse_thread/thread/adaffaaf939b042e/20dafc298df737f0%2320dafc298df737f0?sa=X&oi=groupsr&start=0&num=3
492 # Perl changes [18765] and [18770], perl bug [perl #20920]
494 print "# Finding delay loop...\n";
497 use Time::HiRes qw(time);
503 for ($i = 0; $i < $DelayN; $i++) { }
506 print "# N = $DelayN, t1 = $t1, t0 = $t0, dt = $dt\n";
512 # The time-burner which takes at least T (default 1) seconds.
514 my $c = @_ ? shift : 1;
515 my $n = $c * $DelayN;
517 for ($i = 0; $i < $n; $i++) { }
520 # Next setup a periodic timer (the two-argument alarm() of
521 # Time::HiRes, behind the curtains the libc getitimer() or
522 # ualarm()) which has a signal handler that takes so much time (on
523 # the first initial invocation) that the first periodic invocation
524 # (second invocation) will happen before the first invocation has
525 # finished. In Perl 5.8.0 the "safe signals" concept was
526 # implemented, with unfortunately at least one bug that caused a
527 # core dump on reentering the handler. This bug was fixed by the
528 # time of Perl 5.8.1.
530 # Do not try mixing sleep() and alarm() for testing this.
532 my $a = 0; # Number of alarms we receive.
533 my $A = 2; # Number of alarms we will handle before disarming.
534 # (We may well get $A + 1 alarms.)
538 print "# Alarm $a - ", time(), "\n";
539 alarm(0) if $a >= $A; # Disarm the alarm.
540 $Delay->(2); # Try burning CPU at least for 2T seconds.
543 use Time::HiRes qw(alarm);
544 alarm($T, $T); # Arm the alarm.
546 $Delay->(10); # Try burning CPU at least for 10T seconds.
548 print "ok 29\n"; # Not core dumping by now is considered to be the success.
553 if ($have_clock_gettime &&
554 # All implementations of clock_gettime()
555 # are SUPPOSED TO support CLOCK_REALTIME.
556 has_symbol('CLOCK_REALTIME')) {
560 print "# CLOCK_REALTIME: try = $try\n";
561 my $t0 = clock_gettime(&CLOCK_REALTIME);
562 use Time::HiRes qw(sleep);
565 my $t1 = clock_gettime(&CLOCK_REALTIME);
566 if ($t0 > 0 && $t1 > $t0) {
567 print "# t1 = $t1, t0 = $t0\n";
569 my $rt = abs(1 - $dt / $T);
570 print "# dt = $dt, rt = $rt\n";
571 if ($rt <= 2 * $limit) {
576 print "# Error: t0 = $t0, t1 = $t1\n";
578 my $r = rand() + rand();
579 printf "# Sleeping for %.6f seconds...\n", $r;
589 print "# No clock_gettime\n";
593 if ($have_clock_getres) {
594 my $tr = clock_getres();
596 print "ok 31 # tr = $tr\n";
598 print "not ok 31 # tr = $tr\n";
601 print "# No clock_getres\n";
605 if ($have_clock_nanosleep &&
606 has_symbol('CLOCK_REALTIME')) {
608 my $t = clock_nanosleep(&CLOCK_REALTIME, $s);
609 my $r = abs(1 - $t / $s);
610 if ($r < 2 * $limit) {
613 print "not ok 32 # $t = $t, r = $r\n";
616 print "# No clock_nanosleep\n";
622 print "# clock = @clock\n";
624 for (my $j = 0; $j < 1e6; $j++) { }
625 push @clock, clock();
626 print "# clock = @clock\n";
628 if ($clock[0] >= 0 &&
629 $clock[1] > $clock[0] &&
630 $clock[2] > $clock[1] &&
631 $clock[3] > $clock[2]) {
640 sub bellish { # Cheap emulation of a bell curve.
641 my ($min, $max) = @_;
642 my $rand = ($max - $min) / 5;
651 # 1_100_000 sligthly over 1_000_000,
652 # 2_200_000 slightly over 2**31/1000,
653 # 4_300_000 slightly over 2**32/1000.
654 for my $t ([34, 100_000],
660 for my $retry (1..10) {
662 local $SIG{ ALRM } = sub { $alarmed++ };
663 my $t0 = Time::HiRes::time();
664 print "# t0 = $t0\n";
665 print "# ualarm($n)\n";
666 ualarm($n); 1 while $alarmed == 0;
667 my $t1 = Time::HiRes::time();
668 print "# t1 = $t1\n";
670 print "# dt = $dt\n";
671 my $r = $dt / ($n/1e6);
674 ($n < 1_000_000 || # Too much noise.
675 ($r >= 0.8 && $r <= 1.6));
677 my $nap = bellish(3, 15);
678 printf "# Retrying in %.1f seconds...\n", $nap;
679 Time::HiRes::sleep($nap);
681 ok $i, $ok, "ualarm($n) close enough";
684 print "# No ualarm\n";
688 if ($^O =~ /^(cygwin|MSWin)/) {
689 print "# $^O: timestamps may not be good enough\n";
691 } elsif (&Time::HiRes::d_hires_stat) {
696 Time::HiRes::sleep(rand(0.1) + 0.1);
700 @stat = Time::HiRes::stat($$);
701 push @mtime, $stat[9];
702 Time::HiRes::sleep(rand(0.1) + 0.1);
706 @stat = Time::HiRes::stat($$);
707 push @atime, $stat[8];
710 print "# mtime = @mtime\n";
711 print "# atime = @atime\n";
715 for (my $i = 1; $i < @atime; $i++) {
716 if ($atime[$i] >= $atime[$i-1]) {
719 if ($atime[$i] > int($atime[$i])) {
723 for (my $i = 1; $i < @mtime; $i++) {
724 if ($mtime[$i] >= $mtime[$i-1]) {
727 if ($mtime[$i] > int($mtime[$i])) {
731 print "# ai = $ai, mi = $mi, ss = $ss\n";
732 # Need at least 75% of monotonical increase and
733 # 20% of subsecond results. Yes, this is guessing.
735 print "# No subsecond timestamps detected\n";
737 } elsif ($mi/(@mtime-1) >= 0.75 && $ai/(@atime-1) >= 0.75 &&
738 $ss/(@mtime+@atime) >= 0.2) {
744 print "# No effectual d_hires_stat\n";
748 unless ($can_subsecond_alarm) {
753 $SIG{ALRM} = sub { $alrm++ };
754 Time::HiRes::alarm(0.1);
756 1 while time() - $t0 <= 1;
757 print $alrm ? "ok 39\n" : "not ok 39\n";
761 $SIG{ALRM} = sub { $alrm++ };
762 Time::HiRes::alarm(1.1);
764 1 while time() - $t0 <= 2;
765 print $alrm ? "ok 40\n" : "not ok 40\n";
770 if ($timer_pid) { # Only in the main process.
771 my $left = $TheEnd - time();
772 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;
773 if (kill(0, $timer_pid)) {
775 my $kill = kill('KILL', $timer_pid); # We are done, the timer can go.
777 printf "# kill KILL $timer_pid = %d\n", $kill;
779 unlink("ktrace.out"); # Used in BSD system call tracing.
780 print "# All done.\n";