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..38\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 = 90; # 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";
83 warn "\n$0: overall time allowed for tests (${waitfor}s) exceeded!\n";
84 print "# Terminating main process $ppid...\n";
86 print "# This is the timer process $$, over and out.\n";
89 print "# The timer process $timer_pid launched, continuing testing...\n";
90 $TheEnd = time() + $waitfor;
93 warn "$0: fork failed: $!\n";
96 print "# No timer process (need fork)\n";
101 if (open(XDEFINE, "xdefine")) {
102 chomp($xdefine = <XDEFINE>);
106 # Ideally, we'd like to test that the timers are rather precise.
107 # However, if the system is busy, there are no guarantees on how
108 # quickly we will return. This limit used to be 10%, but that
109 # was occasionally triggered falsely.
111 # Another possibility might be to print "ok" if the test completes fine
112 # with (say) 10% slosh, "skip - system may have been busy?" if the test
113 # completes fine with (say) 30% slosh, and fail otherwise. If you do that,
114 # consider changing over to test.pl at the same time.
115 # --A.D., Nov 27, 2001
116 my $limit = 0.20; # 20% is acceptable slosh for testing timers
119 map { print "ok $_ # skipped\n" } @_;
123 my ($n, $result, @info) = @_;
129 print "# @info\n" if @info;
133 unless ($have_gettimeofday) {
137 my @one = gettimeofday();
138 ok 2, @one == 2, 'gettimeofday returned ', 0+@one, ' args';
139 ok 3, $one[0] > 850_000_000, "@one too small";
143 my @two = gettimeofday();
144 ok 4, ($two[0] > $one[0] || ($two[0] == $one[0] && $two[1] > $one[1])),
145 "@two is not greater than @one";
147 my $f = Time::HiRes::time();
148 ok 5, $f > 850_000_000, "$f too small";
149 ok 6, $f - $two[0] < 2, "$f - $two[0] >= 2";
152 unless ($have_usleep) {
156 use Time::HiRes qw(usleep);
162 ok 7, $one == $two || $two == $three, "slept too long, $one $two $three";
164 unless ($have_gettimeofday) {
168 my $f = Time::HiRes::time();
170 my $f2 = Time::HiRes::time();
172 ok 8, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
176 # Two-arg tv_interval() is always available.
178 my $f = tv_interval [5, 100_000], [10, 500_000];
179 ok 9, abs($f - 5.4) < 0.001, $f;
182 unless ($have_gettimeofday) {
186 my $r = [gettimeofday()];
187 my $f = tv_interval $r;
191 unless ($have_usleep && $have_gettimeofday) {
195 my $r = [ gettimeofday() ];
196 Time::HiRes::sleep( 0.5 );
197 my $f = tv_interval $r;
198 ok 11, $f > 0.4 && $f < 0.9, "slept $f instead of 0.5 secs.";
201 unless ($have_ualarm && $have_alarm) {
206 local $SIG{ ALRM } = sub { $tick++ };
208 my $one = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
209 my $two = time; $tick = 0; ualarm(10_000); while ($tick == 0) { }
211 ok 12, $one == $two || $two == $three, "slept too long, $one $two $three";
212 print "# tick = $tick, one = $one, two = $two, three = $three\n";
214 $tick = 0; ualarm(10_000, 10_000); while ($tick < 3) { }
217 print "# tick = $tick, one = $one, two = $two, three = $three\n";
220 # Did we even get close?
222 unless ($have_gettimeofday) {
225 my ($s, $n, $i) = (0);
227 $s += Time::HiRes::time() - time();
230 # $s should be, at worst, equal to $n
231 # (time() may be rounding down, up, or closest),
232 # but allow 10% of slop.
233 ok 14, abs($s) / $n <= 1.10, "Time::HiRes::time() not close to time()";
234 print "# s = $s, n = $n, s/n = ", abs($s)/$n, "\n";
237 my $has_ualarm = $Config{d_ualarm};
239 $has_ualarm ||= $xdefine =~ /-DHAS_UALARM/;
241 unless ( defined &Time::HiRes::gettimeofday
242 && defined &Time::HiRes::ualarm
243 && defined &Time::HiRes::usleep
246 print "ok $_ # Skip: no gettimeofday or no ualarm or no usleep\n";
249 use Time::HiRes qw(time alarm sleep);
251 my ($f, $r, $i, $not, $ok);
254 print "# time...$f\n";
257 $r = [Time::HiRes::gettimeofday()];
259 print "# sleep...", Time::HiRes::tv_interval($r), "\nok 16\n";
261 $r = [Time::HiRes::gettimeofday()];
267 select (undef, undef, undef, 3);
268 my $ival = Time::HiRes::tv_interval ($r);
269 print "# Select returned! $i $ival\n";
270 print "# ", abs($ival/3 - 1), "\n";
271 # Whether select() gets restarted after signals is
272 # implementation dependent. If it is restarted, we
273 # will get about 3.3 seconds: 3 from the select, 0.3
274 # from the alarm. If this happens, let's just skip
275 # this particular test. --jhi
276 if (abs($ival/3.3 - 1) < $limit) {
277 $ok = "Skip: your select() may get restarted by your SIGALRM (or just retry test)";
281 my $exp = 0.3 * (5 - $i);
282 # This test is more sensitive, so impose a softer limit.
283 if (abs($ival/$exp - 1) > 3*$limit) {
284 my $ratio = abs($ival/$exp);
285 $not = "while: $exp sleep took $ival ratio $ratio";
294 my $ival = Time::HiRes::tv_interval ($r);
295 print "# Tick! $i $ival\n";
296 my $exp = 0.3 * (5 - $i);
297 # This test is more sensitive, so impose a softer limit.
298 if (abs($ival/$exp - 1) > 3*$limit) {
299 my $ratio = abs($ival/$exp);
300 $not = "tick: $exp sleep took $ival ratio $ratio";
305 alarm(0); # can't cancel usig %SIG
307 print $not ? "not ok 17 # $not\n" : "ok 17 # $ok\n";
310 unless ( defined &Time::HiRes::setitimer
311 && defined &Time::HiRes::getitimer
312 && has_symbol('ITIMER_VIRTUAL')
313 && $Config{sig_name} =~ m/\bVTALRM\b/) {
315 print "ok $_ # Skip: no virtual interval timers\n";
318 use Time::HiRes qw(setitimer getitimer ITIMER_VIRTUAL);
321 my $r = [Time::HiRes::gettimeofday()];
324 $i ? $i-- : setitimer(&ITIMER_VIRTUAL, 0);
325 print "# Tick! $i ", Time::HiRes::tv_interval($r), "\n";
328 print "# setitimer: ", join(" ", setitimer(ITIMER_VIRTUAL, 0.5, 0.4)), "\n";
330 # Assume interval timer granularity of $limit * 0.5 seconds. Too bold?
331 my $virt = getitimer(&ITIMER_VIRTUAL);
332 print "not " unless defined $virt && abs($virt / 0.5) - 1 < $limit;
335 print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";
337 while (getitimer(&ITIMER_VIRTUAL)) {
339 for (1..1000) { $j++ } # Can't be unbreakable, must test getitimer().
342 print "# getitimer: ", join(" ", getitimer(ITIMER_VIRTUAL)), "\n";
344 $virt = getitimer(&ITIMER_VIRTUAL);
345 print "not " unless defined $virt && $virt == 0;
348 $SIG{VTALRM} = 'DEFAULT';
351 if ($have_gettimeofday &&
353 use Time::HiRes qw(usleep);
357 my $sleep = 1.5; # seconds
360 $t0 = gettimeofday();
361 $a = abs(sleep($sleep) / $sleep - 1.0);
362 $td = gettimeofday() - $t0;
363 my $ratio = 1.0 + $a;
365 $msg = "$td went by while sleeping $sleep, ratio $ratio.\n";
367 if ($td < $sleep * (1 + $limit)) {
368 print $a < $limit ? "ok 20 # $msg" : "not ok 20 # $msg";
370 print "ok 20 # Skip: $msg";
373 $t0 = gettimeofday();
374 $a = abs(usleep($sleep * 1E6) / ($sleep * 1E6) - 1.0);
375 $td = gettimeofday() - $t0;
378 $msg = "$td went by while sleeping $sleep, ratio $ratio.\n";
380 if ($td < $sleep * (1 + $limit)) {
381 print $a < $limit ? "ok 21 # $msg" : "not ok 21 # $msg";
383 print "ok 21 # Skip: $msg";
388 print "ok $_ # Skip: no gettimeofday\n";
392 unless ($have_nanosleep) {
396 my $one = CORE::time;
397 nanosleep(10_000_000);
398 my $two = CORE::time;
399 nanosleep(10_000_000);
400 my $three = CORE::time;
401 ok 22, $one == $two || $two == $three, "slept too long, $one $two $three";
403 unless ($have_gettimeofday) {
407 my $f = Time::HiRes::time();
408 nanosleep(500_000_000);
409 my $f2 = Time::HiRes::time();
411 ok 23, $d > 0.4 && $d < 0.9, "slept $d secs $f to $f2";
416 print $@ =~ /::sleep\(-1\): negative time not invented yet/ ?
417 "ok 24\n" : "not ok 24\n";
420 print $@ =~ /::usleep\(-2\): negative time not invented yet/ ?
421 "ok 25\n" : "not ok 25\n";
425 print $@ =~ /::alarm\(-3, 0\): negative time not invented yet/ ?
426 "ok 26\n" : "not ok 26\n";
429 print $@ =~ /::ualarm\(-4, 0\): negative time not invented yet/ ?
430 "ok 27\n" : "not ok 27\n";
436 if ($have_nanosleep) {
437 eval { nanosleep(-5) };
438 print $@ =~ /::nanosleep\(-5\): negative time not invented yet/ ?
439 "ok 28\n" : "not ok 28\n";
444 # Find the loop size N (a for() loop 0..N-1)
445 # that will take more than T seconds.
447 if ($have_ualarm && $] >= 5.008001) {
448 # http://groups.google.com/group/perl.perl5.porters/browse_thread/thread/adaffaaf939b042e/20dafc298df737f0%2320dafc298df737f0?sa=X&oi=groupsr&start=0&num=3
449 # Perl changes [18765] and [18770], perl bug [perl #20920]
451 print "# Finding delay loop...\n";
454 use Time::HiRes qw(time);
460 for ($i = 0; $i < $DelayN; $i++) { }
463 print "# N = $DelayN, t1 = $t1, t0 = $t0, dt = $dt\n";
469 # The time-burner which takes at least T (default 1) seconds.
471 my $c = @_ ? shift : 1;
472 my $n = $c * $DelayN;
474 for ($i = 0; $i < $n; $i++) { }
477 # Next setup a periodic timer (the two-argument alarm() of
478 # Time::HiRes, behind the curtains the libc ualarm()) which has
479 # a signal handler that takes so much time (on the first initial
480 # invocation) that the first periodic invocation (second invocation)
481 # will happen before the first invocation has finished. In Perl 5.8.0
482 # the "safe signals" concept was implemented, with unfortunately at least
483 # one bug that caused a core dump on reentering the handler. This bug
484 # was fixed by the time of Perl 5.8.1.
486 # Do not try mixing sleep() and alarm() for testing this.
488 my $a = 0; # Number of alarms we receive.
489 my $A = 2; # Number of alarms we will handle before disarming.
490 # (We may well get $A + 1 alarms.)
494 print "# Alarm $a - ", time(), "\n";
495 alarm(0) if $a >= $A; # Disarm the alarm.
496 $Delay->(2); # Try burning CPU at least for 2T seconds.
499 use Time::HiRes qw(alarm);
500 alarm($T, $T); # Arm the alarm.
502 $Delay->(10); # Try burning CPU at least for 10T seconds.
504 print "ok 29\n"; # Not core dumping by now is considered to be the success.
509 if ($have_clock_gettime &&
510 # All implementations of clock_gettime()
511 # are SUPPOSED TO support CLOCK_REALTIME.
512 has_symbol('CLOCK_REALTIME')) {
516 print "# CLOCK_REALTIME: try = $try\n";
517 my $t0 = clock_gettime(&CLOCK_REALTIME);
518 use Time::HiRes qw(sleep);
521 my $t1 = clock_gettime(&CLOCK_REALTIME);
522 if ($t0 > 0 && $t1 > $t0) {
523 print "# t1 = $t1, t0 = $t0\n";
525 my $rt = abs(1 - $dt / $T);
526 print "# dt = $dt, rt = $rt\n";
527 if ($rt <= 2 * $limit) {
532 print "# Error: t0 = $t0, t1 = $t1\n";
534 my $r = rand() + rand();
535 printf "# Sleeping for %.6f seconds...\n", $r;
545 print "# No clock_gettime\n";
549 if ($have_clock_getres) {
550 my $tr = clock_getres();
552 print "ok 31 # tr = $tr\n";
554 print "not ok 31 # tr = $tr\n";
557 print "# No clock_getres\n";
561 if ($have_clock_nanosleep &&
562 has_symbol('CLOCK_REALTIME')) {
564 my $t = clock_nanosleep(&CLOCK_REALTIME, $s);
565 my $r = abs(1 - $t / $s);
566 if ($r < 2 * $limit) {
569 print "not ok 32 # $t = $t, r = $r\n";
572 print "# No clock_nanosleep\n";
578 print "# clock = @clock\n";
580 for (my $j = 0; $j < 1e6; $j++) { }
581 push @clock, clock();
582 print "# clock = @clock\n";
584 if ($clock[0] >= 0 &&
585 $clock[1] > $clock[0] &&
586 $clock[2] > $clock[1] &&
587 $clock[3] > $clock[2]) {
597 # 1_100_000 sligthly over 1_000_000,
598 # 2_200_000 slightly over 2**31/1000,
599 # 4_300_000 slightly over 2**32/1000.
600 for my $t ([34, 100_000],
606 local $SIG{ ALRM } = sub { $alarmed++ };
607 my $t0 = Time::HiRes::time();
608 print "# t0 = $t0\n";
609 print "# ualarm($n)\n";
610 ualarm($n); 1 while $alarmed == 0;
611 my $t1 = Time::HiRes::time();
612 print "# t1 = $t1\n";
614 print "# dt = $dt\n";
615 my $r = $dt / ($n/1e6);
617 ($n < 1_000_000 || # Too much noise.
618 $r >= 0.9 && $r <= 1.5), "ualarm($n) close enough";
621 print "# No ualarm\n";
625 if ($^O =~ /^(cygwin|MSWin)/) {
626 print "# $^O: timestamps may not be good enough\n";
628 } elsif (&Time::HiRes::d_hires_stat) {
633 Time::HiRes::sleep(rand(0.1) + 0.1);
637 @stat = Time::HiRes::stat($$);
638 push @mtime, $stat[9];
639 Time::HiRes::sleep(rand(0.1) + 0.1);
643 @stat = Time::HiRes::stat($$);
644 push @atime, $stat[8];
647 print "# mtime = @mtime\n";
648 print "# atime = @atime\n";
652 for (my $i = 1; $i < @atime; $i++) {
653 if ($atime[$i] >= $atime[$i-1]) {
656 if ($atime[$i] > int($atime[$i])) {
660 for (my $i = 1; $i < @mtime; $i++) {
661 if ($mtime[$i] >= $mtime[$i-1]) {
664 if ($mtime[$i] > int($mtime[$i])) {
668 print "# ai = $ai, mi = $mi, ss = $ss\n";
669 # Need at least 75% of monotonical increase and
670 # 20% of subsecond results. Yes, this is guessing.
672 print "# No subsecond timestamps detected\n";
674 } elsif ($mi/(@mtime-1) >= 0.75 && $ai/(@atime-1) >= 0.75 &&
675 $ss/(@mtime+@atime) >= 0.2) {
681 print "# No effectual d_hires_stat\n";
686 if ($timer_pid) { # Only in the main process.
687 my $left = $TheEnd - time();
688 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;
689 my $kill = kill('TERM', $timer_pid); # We are done, the timer can go.
690 printf "# kill TERM $timer_pid = %d\n", $kill;
691 unlink("ktrace.out"); # Used in BSD system call tracing.
692 print "# All done.\n";