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#! perl # MANDATORY |
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|
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# this extension swaps out maps and resets them, in essence managing |
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# the reset/swap policy of the server. |
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# it also contains the map prefetching logic |
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|
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#our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu |
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our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out |
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our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # time the map scheduler sleeps between runs |
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our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds |
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our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load |
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our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .4; # swap as fast as possible at this load |
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|
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cf::async_ext { |
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$Coro::current->prio (Coro::PRIO_MIN); |
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# load the header of swapped-out maps. |
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# this is not a correctness issue, it simply saves diskspace |
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# because old files will get cleaned up on reset time |
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Coro::Timer::sleep 1; |
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|
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my $files = Coro::AIO::aio_readdir $cf::TMPDIR; |
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|
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for my $map (@$files) { |
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utf8::decode $map; |
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next if $map =~ /\.(?:pst|meta)$/; |
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cf::map::find $map; |
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cf::wait_for_tick; |
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} |
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|
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#TODO: should also preload random maps... |
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}; |
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|
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our $SCHEDULER = cf::async_ext { |
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while () { |
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Coro::Event::do_timer (after => $SCHEDULE_INTERVAL) |
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unless $cf::LOADAVG > $SWAP_LOAD2; |
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|
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# this weird form of iteration over values is used because |
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# the hash changes underneath us frequently, and for |
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# keeps a direct reference to the value without (in 5.8 perls) |
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# keeping a reference, so this is prone to crashes or worse. |
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my @maps = keys %cf::MAP; |
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for (@maps) { |
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my $map = $cf::MAP{$_} |
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or next; |
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$map->valid or next; |
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|
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eval { |
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# not yet, because maps might become visible to players nearby |
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# we need to remove the map from %cf::MAP and all tiled map links |
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# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { |
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# $map->deactivate; |
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# delete $map->{active}; |
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# } |
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if ($map->should_reset) { |
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$map->reset; |
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} elsif ($map->in_memory == cf::MAP_IN_MEMORY) { |
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my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT; |
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|
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if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { |
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$map->swap_out; |
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cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; |
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} elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
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$map->save; |
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cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; |
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} |
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} |
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}; |
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warn $@ if $@; |
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cf::cede_to_tick; |
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}; |
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} |
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}; |
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|
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$SCHEDULER->prio (-2); |
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