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/cvs/deliantra/server/ext/map-scheduler.ext
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Comparing deliantra/server/ext/map-scheduler.ext (file contents):
Revision 1.17 by root, Fri Jan 5 20:04:02 2007 UTC vs.
Revision 1.26 by root, Tue Jan 23 01:17:08 2007 UTC

1#! perl 1#! perl # MANDATORY
2 2
3# this extension swaps out maps and resets them, in essence managing 3# this extension swaps out maps and resets them, in essence managing
4# the reset/swap policy of the server. 4# the reset/swap policy of the server.
5# it also contains the map prefetching logic
5 6
6our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu 7#our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu
7our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out
8our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 20; # save maps every n seconds 10our $SAVE_TIMEOUT = 20; # save maps every n seconds
10our $SAVE_INTERVAL = 0.1; # save at max. one map every $SAVE_INTERVAL 11our $MAX_ACTIVES = $cf::CFG{max_actives} || 200000; # swap aggressively when > this many objects are active
11 12
12cf::async_ext { 13cf::async_ext {
13 $Coro::current->prio (Coro::PRIO_MIN); 14 $Coro::current->prio (Coro::PRIO_MIN);
14 # load the header of swapped-out maps. 15 # load the header of swapped-out maps.
15 # this is not a correctness issue, it simply saves diskspace 16 # this is not a correctness issue, it simply saves diskspace
… …
20 21
21 for my $map (@$files) { 22 for my $map (@$files) {
22 utf8::decode $map; 23 utf8::decode $map;
23 next if $map =~ /\.(?:pst|meta)$/; 24 next if $map =~ /\.(?:pst|meta)$/;
24 $map =~ s/∕/\//g; 25 $map =~ s/∕/\//g;
26 $map =~ s/\.map$//;
25 cf::map::find $map; 27 cf::map::find $map;
26 Coro::Timer::sleep 0.05; 28 $cf::WAIT_FOR_TICK_ONE->wait;
27 } 29 }
28 30
29 #TODO: should also preload random maps... 31 #TODO: should also preload random maps...
30}; 32};
31 33
32our $SCHEDULER = cf::async_ext { 34our $SCHEDULER = cf::async_ext {
35 my $schedule_interval = Coro::Event->timer (after => 1, interval => $SCHEDULE_INTERVAL);
33 while () { 36 while () {
34 Coro::Timer::sleep $SCHEDULE_INTERVAL; 37 $schedule_interval->next;
35 38
36 # this weird form of iteration over values is used because 39 # this weird form of iteration over values is used because
37 # the hash changes underneath us frequently, and for 40 # the hash changes underneath us frequently, and for
38 # keeps a direct reference to the value without (in 5.8 perls) 41 # keeps a direct reference to the value without (in 5.8 perls)
39 # keeping a reference, so this is prone to crashes or worse. 42 # keeping a reference, so this is prone to crashes or worse.
… …
51# delete $map->{active}; 54# delete $map->{active};
52# } 55# }
53 if ($map->should_reset) { 56 if ($map->should_reset) {
54 $map->reset; 57 $map->reset;
55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 58 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
59 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 60 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
57 $map->swap_out; 61 $map->swap_out;
58 Coro::Timer::sleep $SAVE_INTERVAL; 62 $cf::WAIT_FOR_TICK_ONE->wait;
59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 63 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $map->save; 64 $map->save;
61 Coro::Timer::sleep $SAVE_INTERVAL; 65 $cf::WAIT_FOR_TICK_ONE->wait;
62 } 66 }
63 } 67 }
64 }; 68 };
65 warn $@ if $@; 69 warn $@ if $@;
66 Coro::cede; 70 Coro::cede;
… …
68 } 72 }
69}; 73};
70 74
71$SCHEDULER->prio (-2); 75$SCHEDULER->prio (-2);
72 76
73# map load prefetch for tiled maps, possibly exits, too
74cf::map->attach (
75 on_enter => sub {
76 my ($map, $pl) = @_;
77
78 (cf::async {
79 my @diag; # diagonal neighbours
80
81 for (0 .. 3) {
82 my $neigh = $map->tile_path ($_)
83 or next;
84 $neigh = cf::map::find $neigh, $map
85 or next;
86 $neigh->load;
87
88 push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
89 [$neigh->tile_path (($_ + 1) % 4), $neigh];
90 }
91
92 for (@diag) {
93 my $neigh = cf::map::find @$_
94 or next;
95 $neigh->load;
96 }
97 })->prio (2);
98 # higher prio because prefetching is very important
99 # as it prefetches maps that can make the server block
100 },
101);
102

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