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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 1.16 by root, Fri Jan 5 19:12:01 2007 UTC vs.
Revision 1.40 by root, Sat Jul 28 14:32:21 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} || 300; # number of seconds after which inactive maps get swapped out
8our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 20; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds
10our $SAVE_INTERVAL = 0.1; # save at max. one map every $SAVE_INTERVAL 11our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load
12our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .4; # swap as fast as possible at this load
11 13
12cf::coro { 14cf::async_ext {
13 $Coro::current->prio (Coro::PRIO_MIN); 15 $Coro::current->prio (Coro::PRIO_MIN);
16
14 # load the header of swapped-out maps. 17 # load the header of swapped-out maps.
15 # this is not a correctness issue, it simply saves diskspace 18 # this is not a correctness issue, it simply saves diskspace
16 # because old files will get cleaned up on reset time 19 # because old files will get cleaned up on reset time
17 Coro::Timer::sleep 1; 20 Coro::Timer::sleep 0.25;
18 21
19 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 22 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
20 23 cf::cede_to_tick;
21 for my $map (@$files) {
22 utf8::decode $map;
23 next if $map =~ /\.(?:pst|meta)$/;
24 $map =~ s/∕/\//g;
25 cf::map::find $map; 24 cf::map::find $path;
26 Coro::Timer::sleep 0.05;
27 } 25 }
28 26
29 #TODO: should also preload random maps... 27 # now hunt for resettable per-player maps
28 for my $login (@{ cf::player::list_logins or [] }) {
29 for my $path (@{ cf::player::maps $login or [] }) {
30 cf::cede_to_tick;
31
32 $path =~ /^~[^\/]+(\/.*)$/
33 or next; # doh
34
35 my $base = cf::map::find $1;
36
37 # skip maps without base maps on the assumption
38 # that those are old, unresettable maps
39 next unless $base;
40
41 # skip unresettable maps, for speed
42 next if $base->{deny_reset};
43
44 my $map = cf::map::find $path;
45
46 if ($map->{deny_reset}) {
47 warn "found noreset map with resettable base map, resetting: $path\n";
48 delete $map->{deny_reset};
49 }
50 }
51 }
30}; 52};
31 53
32our $SCHEDULER = cf::coro { 54our $SCHEDULER = cf::async_ext {
55 my $timer = Coro::Event->timer (after => 1);
56
33 while () { 57 while () {
34 Coro::Timer::sleep $SCHEDULE_INTERVAL; 58 $timer->interval ($SCHEDULE_INTERVAL);
59 $timer->next unless $cf::LOADAVG > $SWAP_LOAD2;
35 60
36 # this weird form of iteration over values is used because 61 # this weird form of iteration over values is used because
37 # the hash changes underneath us frequently, and for 62 # the hash changes underneath us frequently, and for
38 # keeps a direct reference to the value without (in 5.8 perls) 63 # keeps a direct reference to the value without (in 5.8 perls)
39 # keeping a reference, so this is prone to crashes or worse. 64 # keeping a reference, so this is prone to crashes or worse.
… …
51# delete $map->{active}; 76# delete $map->{active};
52# } 77# }
53 if ($map->should_reset) { 78 if ($map->should_reset) {
54 $map->reset; 79 $map->reset;
55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 80 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
81 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT;
82
56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 83 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
57 $map->swap_out; 84 $map->swap_out;
58 Coro::Timer::sleep $SAVE_INTERVAL;
59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 85 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $map->save; 86 $map->save;
61 Coro::Timer::sleep $SAVE_INTERVAL; 87 $map->{last_save} -= rand; # randomise map save times a bit
62 } 88 }
63 } 89 }
64 }; 90 };
65 warn $@ if $@; 91 warn $@ if $@;
66 Coro::cede; 92 cf::cede_to_tick;
67 }; 93 };
68 } 94 }
69}; 95};
70 96
71$SCHEDULER->prio (-2); 97$SCHEDULER->prio (-2);
72 98
73# map load prefetch for tiled maps, possibly exits, too
74cf::map->attach (
75 on_enter => sub {
76 my ($map, $pl) = @_;
77
78 (Coro::async_pool {
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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