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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 1.33 by root, Wed Apr 18 17:32:06 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 = 90; # 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 = 5; # 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 = 60; # 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::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;
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::Event::do_timer (after => $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 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT;
57 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
30 $map->swap_out; 58 $map->swap_out;
31 Coro::Timer::sleep $SAVE_INTERVAL; 59 cf::wait_for_tick unless $max_idle == 1;
32 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 60 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
33 $map->save; 61 $map->save;
34 Coro::Timer::sleep $SAVE_INTERVAL; 62 cf::wait_for_tick unless $max_idle == 1;
35 } 63 }
36 } 64 }
37 }; 65 };
38 warn $@ if $@; 66 warn $@ if $@;
39 Coro::cede; 67 Coro::cede;
40 } 68 };
41 } 69 }
42}; 70};
71
43$SCHEDULER->prio (-2); 72$SCHEDULER->prio (-2);
44 73

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