… | |
… | |
181 | my variables are only visible after the statement in which they are |
181 | my variables are only visible after the statement in which they are |
182 | declared. |
182 | declared. |
183 | |
183 | |
184 | =head2 I/O WATCHERS |
184 | =head2 I/O WATCHERS |
185 | |
185 | |
|
|
186 | $w = AnyEvent->io ( |
|
|
187 | fh => <filehandle_or_fileno>, |
|
|
188 | poll => <"r" or "w">, |
|
|
189 | cb => <callback>, |
|
|
190 | ); |
|
|
191 | |
186 | You can create an I/O watcher by calling the C<< AnyEvent->io >> method |
192 | You can create an I/O watcher by calling the C<< AnyEvent->io >> method |
187 | with the following mandatory key-value pairs as arguments: |
193 | with the following mandatory key-value pairs as arguments: |
188 | |
194 | |
189 | C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch |
195 | C<fh> is the Perl I<file handle> (or a naked file descriptor) to watch |
190 | for events (AnyEvent might or might not keep a reference to this file |
196 | for events (AnyEvent might or might not keep a reference to this file |
… | |
… | |
219 | undef $w; |
225 | undef $w; |
220 | }); |
226 | }); |
221 | |
227 | |
222 | =head2 TIME WATCHERS |
228 | =head2 TIME WATCHERS |
223 | |
229 | |
|
|
230 | $w = AnyEvent->timer (after => <seconds>, cb => <callback>); |
|
|
231 | |
|
|
232 | $w = AnyEvent->timer ( |
|
|
233 | after => <fractional_seconds>, |
|
|
234 | interval => <fractional_seconds>, |
|
|
235 | cb => <callback>, |
|
|
236 | ); |
|
|
237 | |
224 | You can create a time watcher by calling the C<< AnyEvent->timer >> |
238 | You can create a time watcher by calling the C<< AnyEvent->timer >> |
225 | method with the following mandatory arguments: |
239 | method with the following mandatory arguments: |
226 | |
240 | |
227 | C<after> specifies after how many seconds (fractional values are |
241 | C<after> specifies after how many seconds (fractional values are |
228 | supported) the callback should be invoked. C<cb> is the callback to invoke |
242 | supported) the callback should be invoked. C<cb> is the callback to invoke |
… | |
… | |
355 | |
369 | |
356 | =back |
370 | =back |
357 | |
371 | |
358 | =head2 SIGNAL WATCHERS |
372 | =head2 SIGNAL WATCHERS |
359 | |
373 | |
|
|
374 | $w = AnyEvent->signal (signal => <uppercase_signal_name>, cb => <callback>); |
|
|
375 | |
360 | You can watch for signals using a signal watcher, C<signal> is the signal |
376 | You can watch for signals using a signal watcher, C<signal> is the signal |
361 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
377 | I<name> in uppercase and without any C<SIG> prefix, C<cb> is the Perl |
362 | callback to be invoked whenever a signal occurs. |
378 | callback to be invoked whenever a signal occurs. |
363 | |
379 | |
364 | Although the callback might get passed parameters, their value and |
380 | Although the callback might get passed parameters, their value and |
… | |
… | |
383 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
399 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
384 | |
400 | |
385 | =head3 Signal Races, Delays and Workarounds |
401 | =head3 Signal Races, Delays and Workarounds |
386 | |
402 | |
387 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
403 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
388 | callbacks to signals in a generic way, which is a pity, as you cannot do |
404 | callbacks to signals in a generic way, which is a pity, as you cannot |
389 | race-free signal handling in perl. AnyEvent will try to do it's best, but |
405 | do race-free signal handling in perl, requiring C libraries for |
|
|
406 | this. AnyEvent will try to do it's best, which means in some cases, |
390 | in some cases, signals will be delayed. The maximum time a signal might |
407 | signals will be delayed. The maximum time a signal might be delayed is |
391 | be delayed is specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 |
408 | specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This |
392 | seconds). This variable can be changed only before the first signal |
409 | variable can be changed only before the first signal watcher is created, |
393 | watcher is created, and should be left alone otherwise. Higher values |
410 | and should be left alone otherwise. This variable determines how often |
|
|
411 | AnyEvent polls for signals (in case a wake-up was missed). Higher values |
394 | will cause fewer spurious wake-ups, which is better for power and CPU |
412 | will cause fewer spurious wake-ups, which is better for power and CPU |
|
|
413 | saving. |
|
|
414 | |
395 | saving. All these problems can be avoided by installing the optional |
415 | All these problems can be avoided by installing the optional |
396 | L<Async::Interrupt> module. This will not work with inherently broken |
416 | L<Async::Interrupt> module, which works with most event loops. It will not |
397 | event loops such as L<Event> or L<Event::Lib> (and not with L<POE> |
417 | work with inherently broken event loops such as L<Event> or L<Event::Lib> |
398 | currently, as POE does it's own workaround with one-second latency). With |
418 | (and not with L<POE> currently, as POE does it's own workaround with |
399 | those, you just have to suffer the delays. |
419 | one-second latency). For those, you just have to suffer the delays. |
400 | |
420 | |
401 | =head2 CHILD PROCESS WATCHERS |
421 | =head2 CHILD PROCESS WATCHERS |
|
|
422 | |
|
|
423 | $w = AnyEvent->child (pid => <process id>, cb => <callback>); |
402 | |
424 | |
403 | You can also watch on a child process exit and catch its exit status. |
425 | You can also watch on a child process exit and catch its exit status. |
404 | |
426 | |
405 | The child process is specified by the C<pid> argument (one some backends, |
427 | The child process is specified by the C<pid> argument (one some backends, |
406 | using C<0> watches for any child process exit, on others this will |
428 | using C<0> watches for any child process exit, on others this will |
… | |
… | |
455 | # do something else, then wait for process exit |
477 | # do something else, then wait for process exit |
456 | $done->recv; |
478 | $done->recv; |
457 | |
479 | |
458 | =head2 IDLE WATCHERS |
480 | =head2 IDLE WATCHERS |
459 | |
481 | |
|
|
482 | $w = AnyEvent->idle (cb => <callback>); |
|
|
483 | |
460 | Sometimes there is a need to do something, but it is not so important |
484 | Sometimes there is a need to do something, but it is not so important |
461 | to do it instantly, but only when there is nothing better to do. This |
485 | to do it instantly, but only when there is nothing better to do. This |
462 | "nothing better to do" is usually defined to be "no other events need |
486 | "nothing better to do" is usually defined to be "no other events need |
463 | attention by the event loop". |
487 | attention by the event loop". |
464 | |
488 | |
… | |
… | |
490 | }); |
514 | }); |
491 | }); |
515 | }); |
492 | |
516 | |
493 | =head2 CONDITION VARIABLES |
517 | =head2 CONDITION VARIABLES |
494 | |
518 | |
|
|
519 | $cv = AnyEvent->condvar; |
|
|
520 | |
|
|
521 | $cv->send (<list>); |
|
|
522 | my @res = $cv->recv; |
|
|
523 | |
495 | If you are familiar with some event loops you will know that all of them |
524 | If you are familiar with some event loops you will know that all of them |
496 | require you to run some blocking "loop", "run" or similar function that |
525 | require you to run some blocking "loop", "run" or similar function that |
497 | will actively watch for new events and call your callbacks. |
526 | will actively watch for new events and call your callbacks. |
498 | |
527 | |
499 | AnyEvent is slightly different: it expects somebody else to run the event |
528 | AnyEvent is slightly different: it expects somebody else to run the event |
… | |
… | |
563 | after => 1, |
592 | after => 1, |
564 | cb => sub { $result_ready->send }, |
593 | cb => sub { $result_ready->send }, |
565 | ); |
594 | ); |
566 | |
595 | |
567 | # this "blocks" (while handling events) till the callback |
596 | # this "blocks" (while handling events) till the callback |
568 | # calls -<send |
597 | # calls ->send |
569 | $result_ready->recv; |
598 | $result_ready->recv; |
570 | |
599 | |
571 | Example: wait for a timer, but take advantage of the fact that condition |
600 | Example: wait for a timer, but take advantage of the fact that condition |
572 | variables are also callable directly. |
601 | variables are also callable directly. |
573 | |
602 | |
… | |
… | |
637 | one. For example, a function that pings many hosts in parallel might want |
666 | one. For example, a function that pings many hosts in parallel might want |
638 | to use a condition variable for the whole process. |
667 | to use a condition variable for the whole process. |
639 | |
668 | |
640 | Every call to C<< ->begin >> will increment a counter, and every call to |
669 | Every call to C<< ->begin >> will increment a counter, and every call to |
641 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
670 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
642 | >>, the (last) callback passed to C<begin> will be executed. That callback |
671 | >>, the (last) callback passed to C<begin> will be executed, passing the |
643 | is I<supposed> to call C<< ->send >>, but that is not required. If no |
672 | condvar as first argument. That callback is I<supposed> to call C<< ->send |
644 | callback was set, C<send> will be called without any arguments. |
673 | >>, but that is not required. If no group callback was set, C<send> will |
|
|
674 | be called without any arguments. |
645 | |
675 | |
646 | You can think of C<< $cv->send >> giving you an OR condition (one call |
676 | You can think of C<< $cv->send >> giving you an OR condition (one call |
647 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
677 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
648 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
678 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
649 | |
679 | |
… | |
… | |
676 | begung can potentially be zero: |
706 | begung can potentially be zero: |
677 | |
707 | |
678 | my $cv = AnyEvent->condvar; |
708 | my $cv = AnyEvent->condvar; |
679 | |
709 | |
680 | my %result; |
710 | my %result; |
681 | $cv->begin (sub { $cv->send (\%result) }); |
711 | $cv->begin (sub { shift->send (\%result) }); |
682 | |
712 | |
683 | for my $host (@list_of_hosts) { |
713 | for my $host (@list_of_hosts) { |
684 | $cv->begin; |
714 | $cv->begin; |
685 | ping_host_then_call_callback $host, sub { |
715 | ping_host_then_call_callback $host, sub { |
686 | $result{$host} = ...; |
716 | $result{$host} = ...; |
… | |
… | |
761 | =item $cb = $cv->cb ($cb->($cv)) |
791 | =item $cb = $cv->cb ($cb->($cv)) |
762 | |
792 | |
763 | This is a mutator function that returns the callback set and optionally |
793 | This is a mutator function that returns the callback set and optionally |
764 | replaces it before doing so. |
794 | replaces it before doing so. |
765 | |
795 | |
766 | The callback will be called when the condition becomes "true", i.e. when |
796 | The callback will be called when the condition becomes (or already was) |
767 | C<send> or C<croak> are called, with the only argument being the condition |
797 | "true", i.e. when C<send> or C<croak> are called (or were called), with |
768 | variable itself. Calling C<recv> inside the callback or at any later time |
798 | the only argument being the condition variable itself. Calling C<recv> |
769 | is guaranteed not to block. |
799 | inside the callback or at any later time is guaranteed not to block. |
770 | |
800 | |
771 | =back |
801 | =back |
772 | |
802 | |
773 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
803 | =head1 SUPPORTED EVENT LOOPS/BACKENDS |
774 | |
804 | |
… | |
… | |
777 | =over 4 |
807 | =over 4 |
778 | |
808 | |
779 | =item Backends that are autoprobed when no other event loop can be found. |
809 | =item Backends that are autoprobed when no other event loop can be found. |
780 | |
810 | |
781 | EV is the preferred backend when no other event loop seems to be in |
811 | EV is the preferred backend when no other event loop seems to be in |
782 | use. If EV is not installed, then AnyEvent will try Event, and, failing |
812 | use. If EV is not installed, then AnyEvent will fall back to its own |
783 | that, will fall back to its own pure-perl implementation, which is |
813 | pure-perl implementation, which is available everywhere as it comes with |
784 | available everywhere as it comes with AnyEvent itself. |
814 | AnyEvent itself. |
785 | |
815 | |
786 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
816 | AnyEvent::Impl::EV based on EV (interface to libev, best choice). |
787 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
|
|
788 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
817 | AnyEvent::Impl::Perl pure-perl implementation, fast and portable. |
789 | |
818 | |
790 | =item Backends that are transparently being picked up when they are used. |
819 | =item Backends that are transparently being picked up when they are used. |
791 | |
820 | |
792 | These will be used when they are currently loaded when the first watcher |
821 | These will be used when they are currently loaded when the first watcher |
793 | is created, in which case it is assumed that the application is using |
822 | is created, in which case it is assumed that the application is using |
794 | them. This means that AnyEvent will automatically pick the right backend |
823 | them. This means that AnyEvent will automatically pick the right backend |
795 | when the main program loads an event module before anything starts to |
824 | when the main program loads an event module before anything starts to |
796 | create watchers. Nothing special needs to be done by the main program. |
825 | create watchers. Nothing special needs to be done by the main program. |
797 | |
826 | |
|
|
827 | AnyEvent::Impl::Event based on Event, very stable, few glitches. |
798 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
828 | AnyEvent::Impl::Glib based on Glib, slow but very stable. |
799 | AnyEvent::Impl::Tk based on Tk, very broken. |
829 | AnyEvent::Impl::Tk based on Tk, very broken. |
800 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
830 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
801 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
831 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
802 | AnyEvent::Impl::Irssi used when running within irssi. |
832 | AnyEvent::Impl::Irssi used when running within irssi. |
… | |
… | |
1076 | |
1106 | |
1077 | package AnyEvent; |
1107 | package AnyEvent; |
1078 | |
1108 | |
1079 | # basically a tuned-down version of common::sense |
1109 | # basically a tuned-down version of common::sense |
1080 | sub common_sense { |
1110 | sub common_sense { |
1081 | # no warnings |
1111 | # from common:.sense 1.0 |
1082 | ${^WARNING_BITS} ^= ${^WARNING_BITS}; |
1112 | ${^WARNING_BITS} = "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03"; |
1083 | # use strict vars subs |
1113 | # use strict vars subs |
1084 | $^H |= 0x00000600; |
1114 | $^H |= 0x00000600; |
1085 | } |
1115 | } |
1086 | |
1116 | |
1087 | BEGIN { AnyEvent::common_sense } |
1117 | BEGIN { AnyEvent::common_sense } |
1088 | |
1118 | |
1089 | use Carp (); |
1119 | use Carp (); |
1090 | |
1120 | |
1091 | our $VERSION = 4.88; |
1121 | our $VERSION = '5.12'; |
1092 | our $MODEL; |
1122 | our $MODEL; |
1093 | |
1123 | |
1094 | our $AUTOLOAD; |
1124 | our $AUTOLOAD; |
1095 | our @ISA; |
1125 | our @ISA; |
1096 | |
1126 | |
… | |
… | |
1122 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1152 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1123 | } |
1153 | } |
1124 | |
1154 | |
1125 | my @models = ( |
1155 | my @models = ( |
1126 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1156 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1127 | [Event:: => AnyEvent::Impl::Event::, 1], |
|
|
1128 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1157 | [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], |
1129 | # everything below here will not (normally) be autoprobed |
1158 | # everything below here will not (normally) be autoprobed |
1130 | # as the pureperl backend should work everywhere |
1159 | # as the pureperl backend should work everywhere |
1131 | # and is usually faster |
1160 | # and is usually faster |
|
|
1161 | [Event:: => AnyEvent::Impl::Event::, 1], |
1132 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1162 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1133 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1163 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1134 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1164 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
1135 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1165 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1136 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1166 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
… | |
… | |
1139 | [Prima:: => AnyEvent::Impl::POE::], |
1169 | [Prima:: => AnyEvent::Impl::POE::], |
1140 | # IO::Async is just too broken - we would need workarounds for its |
1170 | # IO::Async is just too broken - we would need workarounds for its |
1141 | # byzantine signal and broken child handling, among others. |
1171 | # byzantine signal and broken child handling, among others. |
1142 | # IO::Async is rather hard to detect, as it doesn't have any |
1172 | # IO::Async is rather hard to detect, as it doesn't have any |
1143 | # obvious default class. |
1173 | # obvious default class. |
1144 | # [0, IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1174 | [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1145 | # [0, IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1175 | [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1146 | # [0, IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1176 | [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program |
|
|
1177 | [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program |
1147 | ); |
1178 | ); |
1148 | |
1179 | |
1149 | our %method = map +($_ => 1), |
1180 | our %method = map +($_ => 1), |
1150 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1181 | qw(io timer time now now_update signal child idle condvar one_event DESTROY); |
1151 | |
1182 | |
… | |
… | |
1258 | # we assume CLOEXEC is already set by perl in all important cases |
1289 | # we assume CLOEXEC is already set by perl in all important cases |
1259 | |
1290 | |
1260 | ($fh2, $rw) |
1291 | ($fh2, $rw) |
1261 | } |
1292 | } |
1262 | |
1293 | |
|
|
1294 | =head1 SIMPLIFIED AE API |
|
|
1295 | |
|
|
1296 | Starting with version 5.0, AnyEvent officially supports a second, much |
|
|
1297 | simpler, API that is designed to reduce the calling, typing and memory |
|
|
1298 | overhead. |
|
|
1299 | |
|
|
1300 | See the L<AE> manpage for details. |
|
|
1301 | |
|
|
1302 | =cut |
|
|
1303 | |
|
|
1304 | package AE; |
|
|
1305 | |
|
|
1306 | our $VERSION = $AnyEvent::VERSION; |
|
|
1307 | |
|
|
1308 | sub io($$$) { |
|
|
1309 | AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) |
|
|
1310 | } |
|
|
1311 | |
|
|
1312 | sub timer($$$) { |
|
|
1313 | AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]) |
|
|
1314 | } |
|
|
1315 | |
|
|
1316 | sub signal($$) { |
|
|
1317 | AnyEvent->signal (signal => $_[0], cb => $_[1]) |
|
|
1318 | } |
|
|
1319 | |
|
|
1320 | sub child($$) { |
|
|
1321 | AnyEvent->child (pid => $_[0], cb => $_[1]) |
|
|
1322 | } |
|
|
1323 | |
|
|
1324 | sub idle($) { |
|
|
1325 | AnyEvent->idle (cb => $_[0]) |
|
|
1326 | } |
|
|
1327 | |
|
|
1328 | sub cv(;&) { |
|
|
1329 | AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) |
|
|
1330 | } |
|
|
1331 | |
|
|
1332 | sub now() { |
|
|
1333 | AnyEvent->now |
|
|
1334 | } |
|
|
1335 | |
|
|
1336 | sub now_update() { |
|
|
1337 | AnyEvent->now_update |
|
|
1338 | } |
|
|
1339 | |
|
|
1340 | sub time() { |
|
|
1341 | AnyEvent->time |
|
|
1342 | } |
|
|
1343 | |
1263 | package AnyEvent::Base; |
1344 | package AnyEvent::Base; |
1264 | |
1345 | |
1265 | # default implementations for many methods |
1346 | # default implementations for many methods |
1266 | |
1347 | |
1267 | sub _time { |
1348 | sub _time() { |
1268 | # probe for availability of Time::HiRes |
1349 | # probe for availability of Time::HiRes |
1269 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1350 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1270 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1351 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1271 | *_time = \&Time::HiRes::time; |
1352 | *_time = \&Time::HiRes::time; |
1272 | # if (eval "use POSIX (); (POSIX::times())... |
1353 | # if (eval "use POSIX (); (POSIX::times())... |
… | |
… | |
1289 | } |
1370 | } |
1290 | |
1371 | |
1291 | # default implementation for ->signal |
1372 | # default implementation for ->signal |
1292 | |
1373 | |
1293 | our $HAVE_ASYNC_INTERRUPT; |
1374 | our $HAVE_ASYNC_INTERRUPT; |
|
|
1375 | |
|
|
1376 | sub _have_async_interrupt() { |
|
|
1377 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
|
|
1378 | && eval "use Async::Interrupt 1.02 (); 1") |
|
|
1379 | unless defined $HAVE_ASYNC_INTERRUPT; |
|
|
1380 | |
|
|
1381 | $HAVE_ASYNC_INTERRUPT |
|
|
1382 | } |
|
|
1383 | |
1294 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1384 | our ($SIGPIPE_R, $SIGPIPE_W, %SIG_CB, %SIG_EV, $SIG_IO); |
1295 | our (%SIG_ASY, %SIG_ASY_W); |
1385 | our (%SIG_ASY, %SIG_ASY_W); |
1296 | our ($SIG_COUNT, $SIG_TW); |
1386 | our ($SIG_COUNT, $SIG_TW); |
1297 | |
1387 | |
1298 | sub _signal_exec { |
1388 | sub _signal_exec { |
… | |
… | |
1306 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1396 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1307 | } |
1397 | } |
1308 | } |
1398 | } |
1309 | } |
1399 | } |
1310 | |
1400 | |
1311 | # install a dumym wakeupw atcher to reduce signal catching latency |
1401 | # install a dummy wakeup watcher to reduce signal catching latency |
1312 | sub _sig_add() { |
1402 | sub _sig_add() { |
1313 | unless ($SIG_COUNT++) { |
1403 | unless ($SIG_COUNT++) { |
1314 | # try to align timer on a full-second boundary, if possible |
1404 | # try to align timer on a full-second boundary, if possible |
1315 | my $NOW = AnyEvent->now; |
1405 | my $NOW = AE::now; |
1316 | |
1406 | |
1317 | $SIG_TW = AnyEvent->timer ( |
1407 | $SIG_TW = AE::timer |
1318 | after => $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1408 | $MAX_SIGNAL_LATENCY - ($NOW - int $NOW), |
1319 | interval => $MAX_SIGNAL_LATENCY, |
1409 | $MAX_SIGNAL_LATENCY, |
1320 | cb => sub { }, # just for the PERL_ASYNC_CHECK |
1410 | sub { } # just for the PERL_ASYNC_CHECK |
1321 | ); |
1411 | ; |
1322 | } |
1412 | } |
1323 | } |
1413 | } |
1324 | |
1414 | |
1325 | sub _sig_del { |
1415 | sub _sig_del { |
1326 | undef $SIG_TW |
1416 | undef $SIG_TW |
1327 | unless --$SIG_COUNT; |
1417 | unless --$SIG_COUNT; |
1328 | } |
1418 | } |
1329 | |
1419 | |
|
|
1420 | our $_sig_name_init; $_sig_name_init = sub { |
|
|
1421 | eval q{ # poor man's autoloading |
|
|
1422 | undef $_sig_name_init; |
|
|
1423 | |
|
|
1424 | if (_have_async_interrupt) { |
|
|
1425 | *sig2num = \&Async::Interrupt::sig2num; |
|
|
1426 | *sig2name = \&Async::Interrupt::sig2name; |
|
|
1427 | } else { |
|
|
1428 | require Config; |
|
|
1429 | |
|
|
1430 | my %signame2num; |
|
|
1431 | @signame2num{ split ' ', $Config::Config{sig_name} } |
|
|
1432 | = split ' ', $Config::Config{sig_num}; |
|
|
1433 | |
|
|
1434 | my @signum2name; |
|
|
1435 | @signum2name[values %signame2num] = keys %signame2num; |
|
|
1436 | |
|
|
1437 | *sig2num = sub($) { |
|
|
1438 | $_[0] > 0 ? shift : $signame2num{+shift} |
|
|
1439 | }; |
|
|
1440 | *sig2name = sub ($) { |
|
|
1441 | $_[0] > 0 ? $signum2name[+shift] : shift |
|
|
1442 | }; |
|
|
1443 | } |
|
|
1444 | }; |
|
|
1445 | die if $@; |
|
|
1446 | }; |
|
|
1447 | |
|
|
1448 | sub sig2num ($) { &$_sig_name_init; &sig2num } |
|
|
1449 | sub sig2name($) { &$_sig_name_init; &sig2name } |
|
|
1450 | |
1330 | sub _signal { |
1451 | sub signal { |
|
|
1452 | eval q{ # poor man's autoloading {} |
|
|
1453 | # probe for availability of Async::Interrupt |
|
|
1454 | if (_have_async_interrupt) { |
|
|
1455 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1456 | |
|
|
1457 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1458 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
|
|
1459 | |
|
|
1460 | } else { |
|
|
1461 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1462 | |
|
|
1463 | require Fcntl; |
|
|
1464 | |
|
|
1465 | if (AnyEvent::WIN32) { |
|
|
1466 | require AnyEvent::Util; |
|
|
1467 | |
|
|
1468 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1469 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R, 1) if $SIGPIPE_R; |
|
|
1470 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W, 1) if $SIGPIPE_W; # just in case |
|
|
1471 | } else { |
|
|
1472 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1473 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1474 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1475 | |
|
|
1476 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1477 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1478 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1479 | } |
|
|
1480 | |
|
|
1481 | $SIGPIPE_R |
|
|
1482 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1483 | |
|
|
1484 | $SIG_IO = AE::io $SIGPIPE_R, 0, \&_signal_exec; |
|
|
1485 | } |
|
|
1486 | |
|
|
1487 | *signal = sub { |
1331 | my (undef, %arg) = @_; |
1488 | my (undef, %arg) = @_; |
1332 | |
1489 | |
1333 | my $signal = uc $arg{signal} |
1490 | my $signal = uc $arg{signal} |
1334 | or Carp::croak "required option 'signal' is missing"; |
1491 | or Carp::croak "required option 'signal' is missing"; |
1335 | |
1492 | |
1336 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1337 | |
|
|
1338 | if ($HAVE_ASYNC_INTERRUPT) { |
1493 | if ($HAVE_ASYNC_INTERRUPT) { |
1339 | # async::interrupt |
1494 | # async::interrupt |
1340 | |
1495 | |
1341 | $SIG_ASY{$signal} ||= do { |
1496 | $signal = sig2num $signal; |
1342 | my $asy = new Async::Interrupt |
1497 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1498 | |
|
|
1499 | $SIG_ASY{$signal} ||= new Async::Interrupt |
1343 | cb => sub { undef $SIG_EV{$signal} }, |
1500 | cb => sub { undef $SIG_EV{$signal} }, |
1344 | signal => $signal, |
1501 | signal => $signal, |
1345 | pipe => [$SIGPIPE_R->filenos], |
1502 | pipe => [$SIGPIPE_R->filenos], |
|
|
1503 | pipe_autodrain => 0, |
|
|
1504 | ; |
|
|
1505 | |
|
|
1506 | } else { |
|
|
1507 | # pure perl |
|
|
1508 | |
|
|
1509 | # AE::Util has been loaded in signal |
|
|
1510 | $signal = sig2name $signal; |
|
|
1511 | $SIG_CB{$signal}{$arg{cb}} = $arg{cb}; |
|
|
1512 | |
|
|
1513 | $SIG{$signal} ||= sub { |
|
|
1514 | local $!; |
|
|
1515 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
|
|
1516 | undef $SIG_EV{$signal}; |
|
|
1517 | }; |
|
|
1518 | |
|
|
1519 | # can't do signal processing without introducing races in pure perl, |
|
|
1520 | # so limit the signal latency. |
|
|
1521 | _sig_add; |
1346 | ; |
1522 | } |
1347 | $asy->pipe_autodrain (0); |
|
|
1348 | |
1523 | |
1349 | $asy |
1524 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
1350 | }; |
1525 | }; |
1351 | |
1526 | |
1352 | } else { |
1527 | *AnyEvent::Base::signal::DESTROY = sub { |
1353 | # pure perl |
1528 | my ($signal, $cb) = @{$_[0]}; |
1354 | |
1529 | |
1355 | $SIG{$signal} ||= sub { |
1530 | _sig_del; |
1356 | local $!; |
1531 | |
1357 | syswrite $SIGPIPE_W, "\x00", 1 unless %SIG_EV; |
1532 | delete $SIG_CB{$signal}{$cb}; |
|
|
1533 | |
|
|
1534 | $HAVE_ASYNC_INTERRUPT |
|
|
1535 | ? delete $SIG_ASY{$signal} |
|
|
1536 | : # delete doesn't work with older perls - they then |
|
|
1537 | # print weird messages, or just unconditionally exit |
|
|
1538 | # instead of getting the default action. |
1358 | undef $SIG_EV{$signal}; |
1539 | undef $SIG{$signal} |
|
|
1540 | unless keys %{ $SIG_CB{$signal} }; |
1359 | }; |
1541 | }; |
1360 | |
|
|
1361 | # can't do signal processing without introducing races in pure perl, |
|
|
1362 | # so limit the signal latency. |
|
|
1363 | _sig_add; |
|
|
1364 | } |
1542 | }; |
1365 | |
1543 | die if $@; |
1366 | bless [$signal, $arg{cb}], "AnyEvent::Base::signal" |
|
|
1367 | } |
|
|
1368 | |
|
|
1369 | sub signal { |
|
|
1370 | # probe for availability of Async::Interrupt |
|
|
1371 | if (!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} && eval "use Async::Interrupt 0.6 (); 1") { |
|
|
1372 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
|
|
1373 | |
|
|
1374 | $HAVE_ASYNC_INTERRUPT = 1; |
|
|
1375 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
|
|
1376 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R->fileno, poll => "r", cb => \&_signal_exec); |
|
|
1377 | |
|
|
1378 | } else { |
|
|
1379 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
|
|
1380 | |
|
|
1381 | require Fcntl; |
|
|
1382 | |
|
|
1383 | if (AnyEvent::WIN32) { |
|
|
1384 | require AnyEvent::Util; |
|
|
1385 | |
|
|
1386 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
|
|
1387 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_R) if $SIGPIPE_R; |
|
|
1388 | AnyEvent::Util::fh_nonblocking ($SIGPIPE_W) if $SIGPIPE_W; # just in case |
|
|
1389 | } else { |
|
|
1390 | pipe $SIGPIPE_R, $SIGPIPE_W; |
|
|
1391 | fcntl $SIGPIPE_R, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_R; |
|
|
1392 | fcntl $SIGPIPE_W, &Fcntl::F_SETFL, &Fcntl::O_NONBLOCK if $SIGPIPE_W; # just in case |
|
|
1393 | |
|
|
1394 | # not strictly required, as $^F is normally 2, but let's make sure... |
|
|
1395 | fcntl $SIGPIPE_R, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1396 | fcntl $SIGPIPE_W, &Fcntl::F_SETFD, &Fcntl::FD_CLOEXEC; |
|
|
1397 | } |
|
|
1398 | |
|
|
1399 | $SIGPIPE_R |
|
|
1400 | or Carp::croak "AnyEvent: unable to create a signal reporting pipe: $!\n"; |
|
|
1401 | |
|
|
1402 | $SIG_IO = AnyEvent->io (fh => $SIGPIPE_R, poll => "r", cb => \&_signal_exec); |
|
|
1403 | } |
|
|
1404 | |
|
|
1405 | *signal = \&_signal; |
|
|
1406 | &signal |
1544 | &signal |
1407 | } |
|
|
1408 | |
|
|
1409 | sub AnyEvent::Base::signal::DESTROY { |
|
|
1410 | my ($signal, $cb) = @{$_[0]}; |
|
|
1411 | |
|
|
1412 | _sig_del; |
|
|
1413 | |
|
|
1414 | delete $SIG_CB{$signal}{$cb}; |
|
|
1415 | |
|
|
1416 | $HAVE_ASYNC_INTERRUPT |
|
|
1417 | ? delete $SIG_ASY{$signal} |
|
|
1418 | : # delete doesn't work with older perls - they then |
|
|
1419 | # print weird messages, or just unconditionally exit |
|
|
1420 | # instead of getting the default action. |
|
|
1421 | undef $SIG{$signal} |
|
|
1422 | unless keys %{ $SIG_CB{$signal} }; |
|
|
1423 | } |
1545 | } |
1424 | |
1546 | |
1425 | # default implementation for ->child |
1547 | # default implementation for ->child |
1426 | |
1548 | |
1427 | our %PID_CB; |
1549 | our %PID_CB; |
… | |
… | |
1456 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1578 | $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/ |
1457 | ? 1 |
1579 | ? 1 |
1458 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1580 | : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1; |
1459 | |
1581 | |
1460 | unless ($CHLD_W) { |
1582 | unless ($CHLD_W) { |
1461 | $CHLD_W = AnyEvent->signal (signal => 'CHLD', cb => \&_sigchld); |
1583 | $CHLD_W = AE::signal CHLD => \&_sigchld; |
1462 | # child could be a zombie already, so make at least one round |
1584 | # child could be a zombie already, so make at least one round |
1463 | &_sigchld; |
1585 | &_sigchld; |
1464 | } |
1586 | } |
1465 | |
1587 | |
1466 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
1588 | bless [$pid, $arg{cb}], "AnyEvent::Base::child" |
… | |
… | |
1492 | # never use more then 50% of the time for the idle watcher, |
1614 | # never use more then 50% of the time for the idle watcher, |
1493 | # within some limits |
1615 | # within some limits |
1494 | $w = 0.0001 if $w < 0.0001; |
1616 | $w = 0.0001 if $w < 0.0001; |
1495 | $w = 5 if $w > 5; |
1617 | $w = 5 if $w > 5; |
1496 | |
1618 | |
1497 | $w = AnyEvent->timer (after => $w, cb => $rcb); |
1619 | $w = AE::timer $w, 0, $rcb; |
1498 | } else { |
1620 | } else { |
1499 | # clean up... |
1621 | # clean up... |
1500 | undef $w; |
1622 | undef $w; |
1501 | undef $rcb; |
1623 | undef $rcb; |
1502 | } |
1624 | } |
1503 | }; |
1625 | }; |
1504 | |
1626 | |
1505 | $w = AnyEvent->timer (after => 0.05, cb => $rcb); |
1627 | $w = AE::timer 0.05, 0, $rcb; |
1506 | |
1628 | |
1507 | bless \\$cb, "AnyEvent::Base::idle" |
1629 | bless \\$cb, "AnyEvent::Base::idle" |
1508 | } |
1630 | } |
1509 | |
1631 | |
1510 | sub AnyEvent::Base::idle::DESTROY { |
1632 | sub AnyEvent::Base::idle::DESTROY { |
… | |
… | |
1564 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1686 | Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; |
1565 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1687 | wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] |
1566 | } |
1688 | } |
1567 | |
1689 | |
1568 | sub cb { |
1690 | sub cb { |
1569 | $_[0]{_ae_cb} = $_[1] if @_ > 1; |
1691 | my $cv = shift; |
|
|
1692 | |
|
|
1693 | @_ |
|
|
1694 | and $cv->{_ae_cb} = shift |
|
|
1695 | and $cv->{_ae_sent} |
|
|
1696 | and (delete $cv->{_ae_cb})->($cv); |
|
|
1697 | |
1570 | $_[0]{_ae_cb} |
1698 | $cv->{_ae_cb} |
1571 | } |
1699 | } |
1572 | |
1700 | |
1573 | sub begin { |
1701 | sub begin { |
1574 | ++$_[0]{_ae_counter}; |
1702 | ++$_[0]{_ae_counter}; |
1575 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
1703 | $_[0]{_ae_end_cb} = $_[1] if @_ > 1; |
… | |
… | |
1784 | warn "read: $input\n"; # output what has been read |
1912 | warn "read: $input\n"; # output what has been read |
1785 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1913 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1786 | }, |
1914 | }, |
1787 | ); |
1915 | ); |
1788 | |
1916 | |
1789 | my $time_watcher; # can only be used once |
|
|
1790 | |
|
|
1791 | sub new_timer { |
|
|
1792 | $timer = AnyEvent->timer (after => 1, cb => sub { |
1917 | my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub { |
1793 | warn "timeout\n"; # print 'timeout' about every second |
1918 | warn "timeout\n"; # print 'timeout' at most every second |
1794 | &new_timer; # and restart the time |
|
|
1795 | }); |
1919 | }); |
1796 | } |
|
|
1797 | |
|
|
1798 | new_timer; # create first timer |
|
|
1799 | |
1920 | |
1800 | $cv->recv; # wait until user enters /^q/i |
1921 | $cv->recv; # wait until user enters /^q/i |
1801 | |
1922 | |
1802 | =head1 REAL-WORLD EXAMPLE |
1923 | =head1 REAL-WORLD EXAMPLE |
1803 | |
1924 | |
… | |
… | |
1934 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
2055 | through AnyEvent. The benchmark creates a lot of timers (with a zero |
1935 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
2056 | timeout) and I/O watchers (watching STDOUT, a pty, to become writable, |
1936 | which it is), lets them fire exactly once and destroys them again. |
2057 | which it is), lets them fire exactly once and destroys them again. |
1937 | |
2058 | |
1938 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
2059 | Source code for this benchmark is found as F<eg/bench> in the AnyEvent |
1939 | distribution. |
2060 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2061 | for the EV and Perl backends only. |
1940 | |
2062 | |
1941 | =head3 Explanation of the columns |
2063 | =head3 Explanation of the columns |
1942 | |
2064 | |
1943 | I<watcher> is the number of event watchers created/destroyed. Since |
2065 | I<watcher> is the number of event watchers created/destroyed. Since |
1944 | different event models feature vastly different performances, each event |
2066 | different event models feature vastly different performances, each event |
… | |
… | |
1965 | watcher. |
2087 | watcher. |
1966 | |
2088 | |
1967 | =head3 Results |
2089 | =head3 Results |
1968 | |
2090 | |
1969 | name watchers bytes create invoke destroy comment |
2091 | name watchers bytes create invoke destroy comment |
1970 | EV/EV 400000 224 0.47 0.35 0.27 EV native interface |
2092 | EV/EV 100000 223 0.47 0.43 0.27 EV native interface |
1971 | EV/Any 100000 224 2.88 0.34 0.27 EV + AnyEvent watchers |
2093 | EV/Any 100000 223 0.48 0.42 0.26 EV + AnyEvent watchers |
1972 | CoroEV/Any 100000 224 2.85 0.35 0.28 coroutines + Coro::Signal |
2094 | Coro::EV/Any 100000 223 0.47 0.42 0.26 coroutines + Coro::Signal |
1973 | Perl/Any 100000 452 4.13 0.73 0.95 pure perl implementation |
2095 | Perl/Any 100000 431 2.70 0.74 0.92 pure perl implementation |
1974 | Event/Event 16000 517 32.20 31.80 0.81 Event native interface |
2096 | Event/Event 16000 516 31.16 31.84 0.82 Event native interface |
1975 | Event/Any 16000 590 35.85 31.55 1.06 Event + AnyEvent watchers |
2097 | Event/Any 16000 1203 42.61 34.79 1.80 Event + AnyEvent watchers |
1976 | IOAsync/Any 16000 989 38.10 32.77 11.13 via IO::Async::Loop::IO_Poll |
2098 | IOAsync/Any 16000 1911 41.92 27.45 16.81 via IO::Async::Loop::IO_Poll |
1977 | IOAsync/Any 16000 990 37.59 29.50 10.61 via IO::Async::Loop::Epoll |
2099 | IOAsync/Any 16000 1726 40.69 26.37 15.25 via IO::Async::Loop::Epoll |
1978 | Glib/Any 16000 1357 102.33 12.31 51.00 quadratic behaviour |
2100 | Glib/Any 16000 1118 89.00 12.57 51.17 quadratic behaviour |
1979 | Tk/Any 2000 1860 27.20 66.31 14.00 SEGV with >> 2000 watchers |
2101 | Tk/Any 2000 1346 20.96 10.75 8.00 SEGV with >> 2000 watchers |
1980 | POE/Event 2000 6328 109.99 751.67 14.02 via POE::Loop::Event |
2102 | POE/Any 2000 6951 108.97 795.32 14.24 via POE::Loop::Event |
1981 | POE/Select 2000 6027 94.54 809.13 579.80 via POE::Loop::Select |
2103 | POE/Any 2000 6648 94.79 774.40 575.51 via POE::Loop::Select |
1982 | |
2104 | |
1983 | =head3 Discussion |
2105 | =head3 Discussion |
1984 | |
2106 | |
1985 | The benchmark does I<not> measure scalability of the event loop very |
2107 | The benchmark does I<not> measure scalability of the event loop very |
1986 | well. For example, a select-based event loop (such as the pure perl one) |
2108 | well. For example, a select-based event loop (such as the pure perl one) |
… | |
… | |
1998 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
2120 | benchmark machine, handling an event takes roughly 1600 CPU cycles with |
1999 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
2121 | EV, 3100 CPU cycles with AnyEvent's pure perl loop and almost 3000000 CPU |
2000 | cycles with POE. |
2122 | cycles with POE. |
2001 | |
2123 | |
2002 | C<EV> is the sole leader regarding speed and memory use, which are both |
2124 | C<EV> is the sole leader regarding speed and memory use, which are both |
2003 | maximal/minimal, respectively. Even when going through AnyEvent, it uses |
2125 | maximal/minimal, respectively. When using the L<AE> API there is zero |
|
|
2126 | overhead (when going through the AnyEvent API create is about 5-6 times |
|
|
2127 | slower, with other times being equal, so still uses far less memory than |
2004 | far less memory than any other event loop and is still faster than Event |
2128 | any other event loop and is still faster than Event natively). |
2005 | natively. |
|
|
2006 | |
2129 | |
2007 | The pure perl implementation is hit in a few sweet spots (both the |
2130 | The pure perl implementation is hit in a few sweet spots (both the |
2008 | constant timeout and the use of a single fd hit optimisations in the perl |
2131 | constant timeout and the use of a single fd hit optimisations in the perl |
2009 | interpreter and the backend itself). Nevertheless this shows that it |
2132 | interpreter and the backend itself). Nevertheless this shows that it |
2010 | adds very little overhead in itself. Like any select-based backend its |
2133 | adds very little overhead in itself. Like any select-based backend its |
… | |
… | |
2084 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2207 | In this benchmark, we use 10000 socket pairs (20000 sockets), of which 100 |
2085 | (1%) are active. This mirrors the activity of large servers with many |
2208 | (1%) are active. This mirrors the activity of large servers with many |
2086 | connections, most of which are idle at any one point in time. |
2209 | connections, most of which are idle at any one point in time. |
2087 | |
2210 | |
2088 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2211 | Source code for this benchmark is found as F<eg/bench2> in the AnyEvent |
2089 | distribution. |
2212 | distribution. It uses the L<AE> interface, which makes a real difference |
|
|
2213 | for the EV and Perl backends only. |
2090 | |
2214 | |
2091 | =head3 Explanation of the columns |
2215 | =head3 Explanation of the columns |
2092 | |
2216 | |
2093 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2217 | I<sockets> is the number of sockets, and twice the number of "servers" (as |
2094 | each server has a read and write socket end). |
2218 | each server has a read and write socket end). |
… | |
… | |
2102 | a new one that moves the timeout into the future. |
2226 | a new one that moves the timeout into the future. |
2103 | |
2227 | |
2104 | =head3 Results |
2228 | =head3 Results |
2105 | |
2229 | |
2106 | name sockets create request |
2230 | name sockets create request |
2107 | EV 20000 69.01 11.16 |
2231 | EV 20000 62.66 7.99 |
2108 | Perl 20000 73.32 35.87 |
2232 | Perl 20000 68.32 32.64 |
2109 | IOAsync 20000 157.00 98.14 epoll |
2233 | IOAsync 20000 174.06 101.15 epoll |
2110 | IOAsync 20000 159.31 616.06 poll |
2234 | IOAsync 20000 174.67 610.84 poll |
2111 | Event 20000 212.62 257.32 |
2235 | Event 20000 202.69 242.91 |
2112 | Glib 20000 651.16 1896.30 |
2236 | Glib 20000 557.01 1689.52 |
2113 | POE 20000 349.67 12317.24 uses POE::Loop::Event |
2237 | POE 20000 341.54 12086.32 uses POE::Loop::Event |
2114 | |
2238 | |
2115 | =head3 Discussion |
2239 | =head3 Discussion |
2116 | |
2240 | |
2117 | This benchmark I<does> measure scalability and overall performance of the |
2241 | This benchmark I<does> measure scalability and overall performance of the |
2118 | particular event loop. |
2242 | particular event loop. |
… | |
… | |
2244 | As you can see, the AnyEvent + EV combination even beats the |
2368 | As you can see, the AnyEvent + EV combination even beats the |
2245 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2369 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2246 | backend easily beats IO::Lambda and POE. |
2370 | backend easily beats IO::Lambda and POE. |
2247 | |
2371 | |
2248 | And even the 100% non-blocking version written using the high-level (and |
2372 | And even the 100% non-blocking version written using the high-level (and |
2249 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a |
2373 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda |
2250 | large margin, even though it does all of DNS, tcp-connect and socket I/O |
2374 | higher level ("unoptimised") abstractions by a large margin, even though |
2251 | in a non-blocking way. |
2375 | it does all of DNS, tcp-connect and socket I/O in a non-blocking way. |
2252 | |
2376 | |
2253 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2377 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2254 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2378 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2255 | part of the IO::lambda distribution and were used without any changes. |
2379 | part of the IO::Lambda distribution and were used without any changes. |
2256 | |
2380 | |
2257 | |
2381 | |
2258 | =head1 SIGNALS |
2382 | =head1 SIGNALS |
2259 | |
2383 | |
2260 | AnyEvent currently installs handlers for these signals: |
2384 | AnyEvent currently installs handlers for these signals: |
… | |
… | |
2349 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2473 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2350 | purely used for performance. |
2474 | purely used for performance. |
2351 | |
2475 | |
2352 | =item L<JSON> and L<JSON::XS> |
2476 | =item L<JSON> and L<JSON::XS> |
2353 | |
2477 | |
2354 | This module is required when you want to read or write JSON data via |
2478 | One of these modules is required when you want to read or write JSON data |
2355 | L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2479 | via L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2356 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2480 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2357 | |
2481 | |
2358 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2482 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2359 | installed. |
2483 | installed. |
2360 | |
2484 | |