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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 1.32 by root, Mon Apr 16 06:23:41 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 = $cf::CFG{swap_timeout} || 40; # number of seconds after which maps inactive get swapped out
8our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || 5; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 20; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{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
… …
19 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 20 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir;
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 cf::map::find $map; 25 cf::map::find $map;
26 Coro::Timer::sleep 0.05; 26 cf::wait_for_tick;
27 } 27 }
28 28
29 #TODO: should also preload random maps... 29 #TODO: should also preload random maps...
30}; 30};
31 31
32our $SCHEDULER = cf::async_ext { 32our $SCHEDULER = cf::async_ext {
33 while () { 33 while () {
34 Coro::Timer::sleep $SCHEDULE_INTERVAL; 34 Coro::Event::do_timer (after => $SCHEDULE_INTERVAL);
35 35
36 # this weird form of iteration over values is used because 36 # this weird form of iteration over values is used because
37 # the hash changes underneath us frequently, and for 37 # the hash changes underneath us frequently, and for
38 # keeps a direct reference to the value without (in 5.8 perls) 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. 39 # keeping a reference, so this is prone to crashes or worse.
… …
51# delete $map->{active}; 51# delete $map->{active};
52# } 52# }
53 if ($map->should_reset) { 53 if ($map->should_reset) {
54 $map->reset; 54 $map->reset;
55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
56 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 57 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
57 $map->swap_out; 58 $map->swap_out;
58 Coro::Timer::sleep $SAVE_INTERVAL; 59 cf::wait_for_tick unless $max_idle == 1;
59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 60 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $map->save; 61 $map->save;
61 Coro::Timer::sleep $SAVE_INTERVAL; 62 cf::wait_for_tick unless $max_idle == 1;
62 } 63 }
63 } 64 }
64 }; 65 };
65 warn $@ if $@; 66 warn $@ if $@;
66 Coro::cede; 67 Coro::cede;
… …
68 } 69 }
69}; 70};
70 71
71$SCHEDULER->prio (-2); 72$SCHEDULER->prio (-2);
72 73
73# map load prefetch for tiled maps, possibly exits, too
74cf::map->attach (
75 on_enter => sub {
76 my ($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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