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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 1.4 by root, Mon Jan 1 15:32:40 2007 UTC vs.
Revision 1.28 by root, Mon Jan 29 17:57:22 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 = 60; # 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 = 70; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = $cf::CFG{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 = $cf::CFG{schedule_interval} || 10; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 40; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 20; # save maps every n seconds
10our $SAVE_INTERVAL = 0.4; # 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
13cf::async_ext {
14 $Coro::current->prio (Coro::PRIO_MIN);
15 # load the header of swapped-out maps.
16 # this is not a correctness issue, it simply saves diskspace
17 # because old files will get cleaned up on reset time
18 Coro::Timer::sleep 1;
19
20 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir;
21
22 for my $map (@$files) {
23 utf8::decode $map;
24 next if $map =~ /\.(?:pst|meta)$/;
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 {
33 my $schedule_interval = Coro::Event->timer (after => 1, interval => $SCHEDULE_INTERVAL);
13 while () { 34 while () {
14 Coro::Timer::sleep $SCHEDULE_INTERVAL; 35 $schedule_interval->next unless cf::object::actives_size > $MAX_ACTIVES;
15 36
16 for my $map (values %cf::MAP) { 37 # this weird form of iteration over values is used because
38 # the hash changes underneath us frequently, and for
39 # keeps a direct reference to the value without (in 5.8 perls)
40 # keeping a reference, so this is prone to crashes or worse.
41 my @maps = keys %cf::MAP;
42 for (@maps) {
43 my $map = $cf::MAP{$_}
44 or next;
45 $map->valid or next;
46
17 eval { 47 eval {
18 next if $map->players;
19 # not yet, because maps might become visible to players nearby 48 # not yet, because maps might become visible to players nearby
20 # we need to remove the map from %cf::MAP and all tiled map links 49 # we need to remove the map from %cf::MAP and all tiled map links
21# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { 50# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
22# $map->deactivate; 51# $map->deactivate;
23# delete $map->{active}; 52# delete $map->{active};
24# } 53# }
25 if ($map->should_reset) { 54 if ($map->should_reset) {
26 $map->reset; 55 $map->reset;
27 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 56 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
57 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
28 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME) { 58 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
29 $map->swap_out; 59 $map->swap_out;
30 Coro::Timer::sleep $SAVE_INTERVAL; 60 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1;
31 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 61 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
32 $map->save; 62 $map->save;
33 Coro::Timer::sleep $SAVE_INTERVAL; 63 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1;
34 } 64 }
35 } 65 }
36 }; 66 };
37 warn $@ if $@; 67 warn $@ if $@;
38 Coro::cede; 68 Coro::cede;
39 } 69 };
40 } 70 }
41}; 71};
72
42$SCHEDULER->prio (-2); 73$SCHEDULER->prio (-2);
43 74

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