dslinux/user/perl/ext/Time/HiRes/t HiRes.t
cayenne
dslinux_cayenne at user.in-berlin.de
Tue Dec 5 05:26:59 CET 2006
Update of /cvsroot/dslinux/dslinux/user/perl/ext/Time/HiRes/t
In directory antilope:/tmp/cvs-serv7729/ext/Time/HiRes/t
Added Files:
HiRes.t
Log Message:
Adding fresh perl source to HEAD to branch from
--- NEW FILE: 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..33\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;
my $have_clock_nanosleep = &Time::HiRes::d_clock_nanosleep;
my $have_clock = &Time::HiRes::d_clock;
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;
printf "# have_clock_nanosleep = %d\n", $have_clock_nanosleep;
printf "# have_clock = %d\n", $have_clock;
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;
import Time::HiRes 'clock_nanosleep' if $have_clock_nanosleep;
import Time::HiRes 'clock' if $have_clock;
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+ at 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", $r;
sleep($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 = $tr\n";
}
} else {
print "# No clock_getres\n";
skip 31;
}
if ($have_clock_nanosleep &&
has_symbol('CLOCK_REALTIME')) {
my $s = 1.5;
my $t = clock_nanosleep(&CLOCK_REALTIME, $s);
my $r = abs(1 - $t / $s);
if ($r < 2 * $limit) {
print "ok 32\n";
} else {
print "not ok 32 # $t = $t, r = $r\n";
}
} else {
print "# No clock_nanosleep\n";
skip 32;
}
if ($have_clock) {
my @clock = clock();
print "# clock = @clock\n";
for my $i (1..3) {
for (my $j = 0; $j < 1e6; $j++) { }
push @clock, clock();
print "# clock = @clock\n";
}
if ($clock[0] >= 0 &&
$clock[1] > $clock[0] &&
$clock[2] > $clock[1] &&
$clock[3] > $clock[2]) {
print "ok 33\n";
} else {
print "not ok 33\n";
}
} else {
print "# No clock\n";
skip 33;
}
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";
}
}
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