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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 1.3 by root, Mon Jan 1 13:31:47 2007 UTC vs.
Revision 1.21 by root, Wed Jan 10 01:16:52 2007 UTC

1#! perl 1#! perl
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 = 60; # number of seconds after which maps get deactivated to save cpu 7our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu
7our $SWAP_TIMEOUT = 90; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out
8our $SCHEDULE_INTERVAL = 5; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 60; # save maps every n seconds 10our $SAVE_TIMEOUT = 20; # save maps every n seconds
10our $SAVE_INTERVAL = 0.4; # save at max. one map every $SAVE_INTERVAL
11 11
12cf::async_ext {
13 $Coro::current->prio (Coro::PRIO_MIN);
14 # load the header of swapped-out maps.
15 # this is not a correctness issue, it simply saves diskspace
16 # because old files will get cleaned up on reset time
17 Coro::Timer::sleep 1;
18
19 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir;
20
21 for my $map (@$files) {
22 utf8::decode $map;
23 next if $map =~ /\.(?:pst|meta)$/;
24 $map =~ s/∕/\//g;
25 cf::map::find $map;
26 $cf::WAIT_FOR_TICK_ONE->wait;
27 }
28
29 #TODO: should also preload random maps...
30};
31
12our $SCHEDULER = cf::coro { 32our $SCHEDULER = cf::async_ext {
13 while () { 33 while () {
14 Coro::Timer::sleep $SCHEDULE_INTERVAL; 34 Coro::Timer::sleep $SCHEDULE_INTERVAL;
15 35
16 for my $map (values %cf::MAP) { 36 # this weird form of iteration over values is used because
37 # the hash changes underneath us frequently, and for
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.
40 my @maps = keys %cf::MAP;
41 for (@maps) {
42 my $map = $cf::MAP{$_}
43 or next;
44 $map->valid or next;
45
17 eval { 46 eval {
18 next if $map->players;
19 my $last_access = $map->last_access;
20 # not yet, because maps might become visible to players nearby 47 # not yet, because maps might become visible to players nearby
21 # we need to remove the map from %cf::MAP and all tiled map links 48 # we need to remove the map from %cf::MAP and all tiled map links
22# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { 49# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
23# $map->deactivate; 50# $map->deactivate;
24# delete $map->{active}; 51# delete $map->{active};
25# } 52# }
26 if ($map->should_reset) { 53 if ($map->should_reset) {
27 $map->reset; 54 $map->reset;
28 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
29 if ($last_access + $SWAP_TIMEOUT <= $cf::RUNTIME) { 56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) {
57 $cf::WAIT_FOR_TICK_ONE->wait;
30 $map->swap_out; 58 $map->swap_out;
31 Coro::Timer::sleep $SAVE_INTERVAL;
32 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $cf::WAIT_FOR_TICK_ONE->wait;
33 $map->save; 61 $map->save;
34 Coro::Timer::sleep $SAVE_INTERVAL;
35 } 62 }
36 } 63 }
37 }; 64 };
38 warn $@ if $@; 65 warn $@ if $@;
39 Coro::cede; 66 Coro::cede;
40 } 67 };
41 } 68 }
42}; 69};
70
43$SCHEDULER->prio (-2); 71$SCHEDULER->prio (-2);
44 72

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