server/ext/map-scheduler.ext

#! perl # MANDATORY

# this extension swaps out maps and resets them, in essence managing
# the reset/swap policy of the server.
# it also contains the map prefetching logic

#our $DEACTIVATE_TIMEOUT =   20; # number of seconds after which maps get deactivated to save cpu
our $SWAP_TIMEOUT       = $cf::CFG{swap_timeout}      || 40; # number of seconds after which maps inactive get swapped out
our $SCHEDULE_INTERVAL  = $cf::CFG{schedule_interval} ||  5; # time the map scheduler sleeps between runs
our $SAVE_TIMEOUT       = $cf::CFG{save_timeout}      || 20; # save maps every n seconds
our $MAX_ACTIVES        = $cf::CFG{max_actives}       || 200000; # swap aggressively when > this many objects are active

cf::async_ext {
   $Coro::current->prio (Coro::PRIO_MIN);
   # load the header of swapped-out maps.
   # this is not a correctness issue, it simply saves diskspace
   # because old files will get cleaned up on reset time
   Coro::Timer::sleep 1;

   my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir;

   for my $map (@$files) {
      utf8::decode $map;
      next if $map =~ /\.(?:pst|meta)$/;
      cf::map::find $map;
      cf::wait_for_tick;
   }

   #TODO: should also preload random maps...
};

our $SCHEDULER = cf::async_ext {
   while () {
      Coro::Event::do_timer (after => $SCHEDULE_INTERVAL);

      # this weird form of iteration over values is used because
      # the hash changes underneath us frequently, and for
      # keeps a direct reference to the value without (in 5.8 perls)
      # keeping a reference, so this is prone to crashes or worse.
      my @maps = keys %cf::MAP;
      for (@maps) {
         my $map = $cf::MAP{$_}
            or next;
         $map->valid or next;

         eval {
            # not yet, because maps might become visible to players nearby
            # we need to remove the map from %cf::MAP and all tiled map links
#         if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
#            $map->deactivate;
#            delete $map->{active};
#         }
            if ($map->should_reset) {
               $map->reset;
            } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
               my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
               if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
                  $map->swap_out;
                  cf::wait_for_tick unless $max_idle == 1;
               } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
                  $map->save;
                  cf::wait_for_tick unless $max_idle == 1;
               }
            }
         };
         warn $@ if $@;
         Coro::cede;
      };
   }
};

$SCHEDULER->prio (-2);

Revision:	1.32
Committed:	Mon Apr 16 06:23:41 2007 UTC (17 years, 1 month ago) by root
Branch:	MAIN
Changes since 1.31:	+3 -5 lines
Log Message:	VERY EXPERIMENTAL - change the way archetypes and treasurelists are being loaded: - referring to a nonexisting treasurelist will create an empty one - referring to a nonexisting archetype will create an empty one - archetypes/treasurelists will overwrite any existing object of the same name. - net effect should be to allow reloading of archetypes and treasurelists at runtime at a later stage.
#	Content
1	#! perl # MANDATORY
2
3	# this extension swaps out maps and resets them, in essence managing
4	# the reset/swap policy of the server.
5	# it also contains the map prefetching logic
6
7	#our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu
8	our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} \|\| 40; # number of seconds after which maps inactive get swapped out
9	our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} \|\| 5; # time the map scheduler sleeps between runs
10	our $SAVE_TIMEOUT = $cf::CFG{save_timeout} \|\| 20; # save maps every n seconds
11	our $MAX_ACTIVES = $cf::CFG{max_actives} \|\| 200000; # swap aggressively when > this many objects are active
12
13	cf::async_ext {
14	$Coro::current->prio (Coro::PRIO_MIN);
15	# load the header of swapped-out maps.
16	# this is not a correctness issue, it simply saves diskspace
17	# because old files will get cleaned up on reset time
18	Coro::Timer::sleep 1;
19
20	my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir;
21
22	for my $map (@$files) {
23	utf8::decode $map;
24	next if $map =~ /\.(?:pst\|meta)$/;
25	cf::map::find $map;
26	cf::wait_for_tick;
27	}
28
29	#TODO: should also preload random maps...
30	};
31
32	our $SCHEDULER = cf::async_ext {
33	while () {
34	Coro::Event::do_timer (after => $SCHEDULE_INTERVAL);
35
36	# this weird form of iteration over values is used because
37	# the hash changes underneath us frequently, and for
38	# keeps a direct reference to the value without (in 5.8 perls)
39	# keeping a reference, so this is prone to crashes or worse.
40	my @maps = keys %cf::MAP;
41	for (@maps) {
42	my $map = $cf::MAP{$_}
43	or next;
44	$map->valid or next;
45
46	eval {
47	# not yet, because maps might become visible to players nearby
48	# we need to remove the map from %cf::MAP and all tiled map links
49	# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
50	# $map->deactivate;
51	# delete $map->{active};
52	# }
53	if ($map->should_reset) {
54	$map->reset;
55	} elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
56	my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
57	if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
58	$map->swap_out;
59	cf::wait_for_tick unless $max_idle == 1;
60	} elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
61	$map->save;
62	cf::wait_for_tick unless $max_idle == 1;
63	}
64	}
65	};
66	warn $@ if $@;
67	Coro::cede;
68	};
69	}
70	};
71
72	$SCHEDULER->prio (-2);
73