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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 1.14 by root, Fri Jan 5 01:06:40 2007 UTC vs.
Revision 1.39 by root, Sat Jul 28 13:13:36 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 { 14warn "load1 ", $SWAP_LOAD1;#d#
15warn "load2 ", $SWAP_LOAD2;#d#
16
17cf::async_ext {
13 $Coro::current->prio (Coro::PRIO_MIN); 18 $Coro::current->prio (Coro::PRIO_MIN);
19
14 # load the header of swapped-out maps. 20 # load the header of swapped-out maps.
15 # this is not a correctness issue, it simply saves diskspace 21 # this is not a correctness issue, it simply saves diskspace
16 # because old files will get cleaned up on reset time 22 # because old files will get cleaned up on reset time
17 Coro::Timer::sleep 5; 23 Coro::Timer::sleep 0.25;
18 24
19 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 25 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
20 26 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; 27 cf::map::find $path;
26 Coro::Timer::sleep 0.05;
27 } 28 }
28 29
29 #TODO: should also preload random maps... 30 # now hunt for resettable per-player maps
31 for my $login (@{ cf::player::list_logins or [] }) {
32 for my $path (@{ cf::player::maps $login or [] }) {
33 cf::cede_to_tick;
34
35 $path =~ /^~[^\/]+(\/.*)$/
36 or next; # doh
37
38 my $base = cf::map::find $1;
39
40 # skip maps without base maps on the assumption
41 # that those are old, unresettable maps
42 next unless $base;
43
44 # skip unresettable maps, for speed
45 next if $base->{deny_reset};
46
47 my $map = cf::map::find $path;
48
49 if ($map->{deny_reset}) {
50 warn "found noreset map with resettable base map, resetting: $path\n";
51 delete $map->{deny_reset};
52 }
53 }
54 }
30}; 55};
31 56
32our $SCHEDULER = cf::coro { 57our $SCHEDULER = cf::async_ext {
58 my $timer = Coro::Event->timer (after => 1);
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, 0), 0, $SWAP_TIMEOUT;
85
56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 86 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
57 $map->swap_out; 87 $map->swap_out;
58 Coro::Timer::sleep $SAVE_INTERVAL;
59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 88 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $map->save; 89 $map->save;
61 Coro::Timer::sleep $SAVE_INTERVAL; 90 $map->{last_save} -= rand; # randomise map save times a bit
62 } 91 }
63 } 92 }
64 }; 93 };
65 warn $@ if $@; 94 warn $@ if $@;
66 Coro::cede; 95 cf::cede_to_tick;
67 }; 96 };
68 } 97 }
69}; 98};
70 99
71$SCHEDULER->prio (-2); 100$SCHEDULER->prio (-2);
72 101
73# map load prefetch
74cf::map->attach (
75 on_enter => sub {
76 my ($map, $pl) = @_;
77
78 # floodfill surrounging maps, asynchronously
79 },
80);
81

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