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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 1.20 by root, Tue Jan 9 21:32:42 2007 UTC vs.
Revision 1.44 by root, Mon Oct 1 00:55:51 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} || 300; # number of seconds after which inactive maps get swapped out
9our $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
10our $SAVE_TIMEOUT = 20; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds
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::async_ext { 14cf::async_ext {
15 $Coro::current->{desc} = "startup map scanner";
13 $Coro::current->prio (Coro::PRIO_MIN); 16 $Coro::current->prio (Coro::PRIO_MIN);
17
14 # load the header of swapped-out maps. 18 # load the header of swapped-out maps.
15 # this is not a correctness issue, it simply saves diskspace 19 # this is not a correctness issue, it simply saves diskspace
16 # because old files will get cleaned up on reset time 20 # because old files will get cleaned up on reset time
17 Coro::Timer::sleep 1; 21 Coro::Timer::sleep 0.25;
18 22
19 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 23 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
20 24 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; 25 cf::map::find $path;
26 Coro::Timer::sleep 0.3;
27 } 26 }
28 27
29 #TODO: should also preload random maps... 28 # now hunt for resettable per-player maps
29 for my $login (@{ cf::player::list_logins or [] }) {
30 for my $path (@{ cf::player::maps $login or [] }) {
31 cf::cede_to_tick;
32
33 $path =~ /^~[^\/]+(\/.*)$/
34 or next; # doh
35
36 my $base = cf::map::find $1;
37
38 # skip maps without base maps on the assumption
39 # that those are old, unresettable maps
40 next unless $base;
41
42 # skip unresettable maps, for speed
43 next if $base->{deny_reset};
44
45 my $map = cf::map::find $path;
46
47 if ($map->{deny_reset}) {
48 warn "found noreset map with resettable base map, resetting: $path\n";
49 delete $map->{deny_reset};
50 }
51 }
52 }
30}; 53};
31 54
32our $SCHEDULER = cf::async_ext { 55our $SCHEDULER = cf::async_ext {
56 $Coro::current->{desc} = "map scheduler";
57 $Coro::current->prio (Coro::PRIO_MAX);
58 my $timer = Coro::Event->timer (after => 1, data => cf::WF_AUTOCANCEL);
59
33 while () { 60 while () {
34 Coro::Timer::sleep $SCHEDULE_INTERVAL; 61 $timer->interval ($SCHEDULE_INTERVAL);
62 $timer->next unless $cf::LOADAVG > $SWAP_LOAD2;
35 63
36 # this weird form of iteration over values is used because 64 # this weird form of iteration over values is used because
37 # the hash changes underneath us frequently, and for 65 # the hash changes underneath us frequently, and for
38 # keeps a direct reference to the value without (in 5.8 perls) 66 # keeps a direct reference to the value without (in 5.8 perls)
39 # keeping a reference, so this is prone to crashes or worse. 67 # keeping a reference, so this is prone to crashes or worse.
… …
51# delete $map->{active}; 79# delete $map->{active};
52# } 80# }
53 if ($map->should_reset) { 81 if ($map->should_reset) {
54 $map->reset; 82 $map->reset;
55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 83 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
84 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, $cf::TICK * 1.5),
85 $cf::TICK * 1.5, $SWAP_TIMEOUT;
86
56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 87 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
57 $cf::WAIT_FOR_TICK_ONE->wait;
58 $map->swap_out; 88 $map->swap_out;
59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 89 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $cf::WAIT_FOR_TICK_ONE->wait;
61 $map->save; 90 $map->save;
91 $map->{last_save} -= rand; # randomise map save times a bit
62 } 92 }
63 } 93 }
64 }; 94 };
65 warn $@ if $@; 95 warn $@ if $@;
66 Coro::cede; 96 cf::cede_to_tick;
67 }; 97 };
68 } 98 }
69}; 99};
70 100
71$SCHEDULER->prio (-2); 101$SCHEDULER->prio (-2);
72 102
73# map load prefetch for tiled maps, possibly exits, too
74cf::map->attach (
75 on_enter => sub {
76 my ($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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