| 1 |
#! perl # mandatory |
| 2 |
|
| 3 |
# this extension swaps out maps and resets them, in essence managing |
| 4 |
# the reset/swap policy of the server. |
| 5 |
# it also contains the map prefetching logic |
| 6 |
|
| 7 |
#our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu |
| 8 |
our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out |
| 9 |
our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # time the map scheduler sleeps between runs |
| 10 |
our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds |
| 11 |
our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load |
| 12 |
our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .4; # swap as fast as possible at this load |
| 13 |
|
| 14 |
cf::async_ext { |
| 15 |
$Coro::current->prio (Coro::PRIO_MIN); |
| 16 |
|
| 17 |
# load the header of swapped-out maps. |
| 18 |
# this is not a correctness issue, it simply saves diskspace |
| 19 |
# because old files will get cleaned up on reset time |
| 20 |
Coro::Timer::sleep 0.25; |
| 21 |
|
| 22 |
for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) { |
| 23 |
cf::cede_to_tick; |
| 24 |
cf::map::find $path; |
| 25 |
} |
| 26 |
|
| 27 |
# now hunt for resettable per-player maps |
| 28 |
for my $login (@{ cf::player::list_logins or [] }) { |
| 29 |
for my $path (@{ cf::player::maps $login or [] }) { |
| 30 |
cf::cede_to_tick; |
| 31 |
|
| 32 |
$path =~ /^~[^\/]+(\/.*)$/ |
| 33 |
or next; # doh |
| 34 |
|
| 35 |
my $base = cf::map::find $1; |
| 36 |
|
| 37 |
# skip maps without base maps on the assumption |
| 38 |
# that those are old, unresettable maps |
| 39 |
next unless $base; |
| 40 |
|
| 41 |
# skip unresettable maps, for speed |
| 42 |
next if $base->{deny_reset}; |
| 43 |
|
| 44 |
my $map = cf::map::find $path; |
| 45 |
|
| 46 |
if ($map->{deny_reset}) { |
| 47 |
warn "found noreset map with resettable base map, resetting: $path\n"; |
| 48 |
delete $map->{deny_reset}; |
| 49 |
} |
| 50 |
} |
| 51 |
} |
| 52 |
}; |
| 53 |
|
| 54 |
our $SCHEDULER = cf::async_ext { |
| 55 |
my $timer = Coro::Event->timer (after => 1); |
| 56 |
|
| 57 |
while () { |
| 58 |
$timer->interval ($SCHEDULE_INTERVAL); |
| 59 |
$timer->next unless $cf::LOADAVG > $SWAP_LOAD2; |
| 60 |
|
| 61 |
# this weird form of iteration over values is used because |
| 62 |
# the hash changes underneath us frequently, and for |
| 63 |
# keeps a direct reference to the value without (in 5.8 perls) |
| 64 |
# keeping a reference, so this is prone to crashes or worse. |
| 65 |
my @maps = keys %cf::MAP; |
| 66 |
for (@maps) { |
| 67 |
my $map = $cf::MAP{$_} |
| 68 |
or next; |
| 69 |
$map->valid or next; |
| 70 |
|
| 71 |
eval { |
| 72 |
# not yet, because maps might become visible to players nearby |
| 73 |
# we need to remove the map from %cf::MAP and all tiled map links |
| 74 |
# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { |
| 75 |
# $map->deactivate; |
| 76 |
# delete $map->{active}; |
| 77 |
# } |
| 78 |
if ($map->should_reset) { |
| 79 |
$map->reset; |
| 80 |
} elsif ($map->in_memory == cf::MAP_IN_MEMORY) { |
| 81 |
my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT; |
| 82 |
|
| 83 |
if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { |
| 84 |
$map->swap_out; |
| 85 |
} elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
| 86 |
$map->save; |
| 87 |
} |
| 88 |
} |
| 89 |
}; |
| 90 |
warn $@ if $@; |
| 91 |
cf::cede_to_tick; |
| 92 |
}; |
| 93 |
} |
| 94 |
}; |
| 95 |
|
| 96 |
$SCHEDULER->prio (-2); |
| 97 |
|
