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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 1.9 by root, Wed Jan 3 12:33:33 2007 UTC vs.
Revision 1.30 by root, Wed Feb 14 00:43:54 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 = 50; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 40; # number of seconds after which maps inactive get swapped out
8our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || 5; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 30; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 20; # save maps every n seconds
10our $SAVE_INTERVAL = 0.3; # 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->wait;
27 $cf::WAIT_FOR_TICK->wait;
28 $cf::WAIT_FOR_TICK->wait;
29 }
30
31 #TODO: should also preload random maps...
32};
33
12our $SCHEDULER = cf::coro { 34our $SCHEDULER = cf::async_ext {
35 my $schedule_interval = Coro::Event->timer (after => 1, interval => $SCHEDULE_INTERVAL);
13 while () { 36 while () {
14 Coro::Timer::sleep $SCHEDULE_INTERVAL; 37 $schedule_interval->next unless cf::object::actives_size > $MAX_ACTIVES;
15 38
16 # this weird form of iteration over values is used because 39 # this weird form of iteration over values is used because
17 # the hash changes underneath us frequently, and for 40 # the hash changes underneath us frequently, and for
18 # keeps a direct reference to the value without (in 5.8 perls) 41 # keeps a direct reference to the value without (in 5.8 perls)
19 # keeping a reference, so this is prone to crashes or worse. 42 # keeping a reference, so this is prone to crashes or worse.
… …
31# delete $map->{active}; 54# delete $map->{active};
32# } 55# }
33 if ($map->should_reset) { 56 if ($map->should_reset) {
34 $map->reset; 57 $map->reset;
35 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 58 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
59 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
36 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 60 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
37 $map->swap_out; 61 $map->swap_out;
38 Coro::Timer::sleep $SAVE_INTERVAL; 62 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1;
39 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 63 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
40 $map->save; 64 $map->save;
41 Coro::Timer::sleep $SAVE_INTERVAL; 65 $cf::WAIT_FOR_TICK_ONE->wait unless $max_idle == 1;
42 } 66 }
43 } 67 }
44 }; 68 };
45 warn $@ if $@; 69 warn $@ if $@;
46 Coro::cede; 70 Coro::cede;

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