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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 1.19 by root, Mon Jan 8 14:11:05 2007 UTC vs.
Revision 1.27 by root, Fri Jan 26 20:59:57 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# it also contains the map prefetching logic
6 6
7our $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
8our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 35; # number of seconds after which maps inactive get swapped out
9our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || 10; # time the map scheduler sleeps between runs
10our $SAVE_TIMEOUT = 20; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 20; # save maps every n seconds
11our $SAVE_INTERVAL = 0.2; # save at max. one map every $SAVE_INTERVAL 11our $MAX_ACTIVES = $cf::CFG{max_actives} || 200000; # swap aggressively when > this many objects are active
12 12
13cf::async_ext { 13cf::async_ext {
14 $Coro::current->prio (Coro::PRIO_MIN); 14 $Coro::current->prio (Coro::PRIO_MIN);
15 # load the header of swapped-out maps. 15 # load the header of swapped-out maps.
16 # this is not a correctness issue, it simply saves diskspace 16 # this is not a correctness issue, it simply saves diskspace
… …
21 21
22 for my $map (@$files) { 22 for my $map (@$files) {
23 utf8::decode $map; 23 utf8::decode $map;
24 next if $map =~ /\.(?:pst|meta)$/; 24 next if $map =~ /\.(?:pst|meta)$/;
25 $map =~ s/∕/\//g; 25 $map =~ s/∕/\//g;
26 $map =~ s/\.map$//;
26 cf::map::find $map; 27 cf::map::find $map;
27 Coro::Timer::sleep 0.3; 28 $cf::WAIT_FOR_TICK_ONE->wait;
28 } 29 }
29 30
30 #TODO: should also preload random maps... 31 #TODO: should also preload random maps...
31}; 32};
32 33
33our $SCHEDULER = cf::async_ext { 34our $SCHEDULER = cf::async_ext {
35 my $schedule_interval = Coro::Event->timer (after => 1, interval => $SCHEDULE_INTERVAL);
34 while () { 36 while () {
35 Coro::Timer::sleep $SCHEDULE_INTERVAL; 37 $schedule_interval->next unless cf::object::actives_size > $MAX_ACTIVES;
36 38
37 # this weird form of iteration over values is used because 39 # this weird form of iteration over values is used because
38 # the hash changes underneath us frequently, and for 40 # the hash changes underneath us frequently, and for
39 # 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)
40 # keeping a reference, so this is prone to crashes or worse. 42 # keeping a reference, so this is prone to crashes or worse.
… …
52# delete $map->{active}; 54# delete $map->{active};
53# } 55# }
54 if ($map->should_reset) { 56 if ($map->should_reset) {
55 $map->reset; 57 $map->reset;
56 } elsif ($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 : $SWAP_TIMEOUT;
57 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 60 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
58 $map->swap_out; 61 $map->swap_out;
59 Coro::Timer::sleep $SAVE_INTERVAL; 62 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1;
60 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 63 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
61 $map->save; 64 $map->save;
62 Coro::Timer::sleep $SAVE_INTERVAL; 65 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1;
63 } 66 }
64 } 67 }
65 }; 68 };
66 warn $@ if $@; 69 warn $@ if $@;
67 Coro::cede; 70 Coro::cede;
… …
69 } 72 }
70}; 73};
71 74
72$SCHEDULER->prio (-2); 75$SCHEDULER->prio (-2);
73 76
74# map load prefetch for tiled maps, possibly exits, too
75cf::map->attach (
76 on_enter => sub {
77 my ($map, $pl) = @_;
78
79 (cf::async {
80 my @diag; # diagonal neighbours
81
82 for (0 .. 3) {
83 my $neigh = $map->tile_path ($_)
84 or next;
85 $neigh = cf::map::find $neigh, $map
86 or next;
87 $neigh->load;
88
89 push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
90 [$neigh->tile_path (($_ + 1) % 4), $neigh];
91 }
92
93 for (@diag) {
94 my $neigh = cf::map::find @$_
95 or next;
96 $neigh->load;
97 }
98 })->prio (2);
99 # higher prio because prefetching is very important
100 # as it prefetches maps that can make the server block
101 },
102);
103

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