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#! perl |
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|
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# this plug-in prefetches maps. everytime a player enters a map, |
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# it will asynchronously prefetch files from disk (it will not load them |
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# into the server, but into the OS cache only). |
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|
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use Errno (); |
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use Time::HiRes; |
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use Fcntl; |
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use IO::AIO; |
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|
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# find all potential exit paths, this is slow, so this info is cached |
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sub find_exits { |
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my ($map) = @_; |
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|
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my %exit; |
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|
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# normal exits |
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for my $x (0 .. $map->width - 1) { |
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for my $y (0 .. $map->height - 1) { |
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for (grep $_->type == 66, $map->at ($x, $y)) { |
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my $path = $_->slaying; |
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|
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next if 3 > length $path; |
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|
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# TODO: improve unique exit detection etc. |
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$exit{cf::maps_directory cf::path_combine_and_normalize $map->path, $path}++; |
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} |
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} |
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} |
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|
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# tiled maps |
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for (0..3) { |
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my $path = $map->tile_path ($_) |
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or next; |
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|
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$exit{cf::maps_directory cf::path_combine_and_normalize $map->path, $path}++; |
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} |
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|
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[keys %exit] |
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} |
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|
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my $PREFETCHING; |
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my @PREFETCH; |
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my %FILE_TIMEOUT; |
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|
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sub _prefetch; |
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|
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my $empty_cb = sub { }; |
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|
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sub load_file { |
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my ($path, $cb) = @_; |
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|
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my $NOW = Time::HiRes::time; |
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|
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aio_open $path, O_RDONLY, 0, sub { |
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my $fh = shift |
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or return $cb->(), _prefetch; |
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|
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aio_readahead $fh, 0, -s $fh, sub { |
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my $time = Time::HiRes::time - $NOW; |
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warn "LONG PREFETCH $path $time\n" if $time > 0.3; |
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|
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$cb->(), _prefetch; |
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}; |
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}; |
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} |
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|
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sub prefetch($$;$) { |
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my ($type, $path, $cb) = @_; |
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|
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push @PREFETCH, [$type, $path, $cb || $empty_cb]; |
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_prefetch unless $PREFETCHING; |
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} |
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|
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sub _prefetch { |
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$PREFETCHING = 1; |
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|
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# while (@PREFETCH) { |
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# my ($type, $path, $cb) = @{ shift @PREFETCH }; |
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# |
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# my $NOW = Time::HiRes::time; |
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# $cb->(), next if $FILE_TIMEOUT{$path} > $NOW; |
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# $FILE_TIMEOUT{$path} = $NOW + 60 + rand 60; |
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# |
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# if ($type eq "map") { |
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# if (my $map = cf::map::find $path) { |
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# $cb->(), next if $map->in_memory == cf::MAP_IN_MEMORY; |
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# |
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# prefetch file => $map->tmpname |
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# if $map->in_memory == cf::MAP_SWAPPED; |
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# } |
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# } |
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# |
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# load_file $path, $cb; |
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# return; |
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# } |
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|
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$PREFETCHING = 0; |
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} |
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|
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my %MAP_EXITS; |
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|
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sub prefetch_map($) { |
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my ($map) = @_; |
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|
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my $exit = $MAP_EXITS{$map->path} ||= find_exits $map; |
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prefetch map => $_ for @$exit; |
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} |
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|
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cf::player->attach ( |
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prio => -900, |
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on_map_change => sub { |
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my ($pl, $new, $x, $x) = @_; |
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|
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prefetch_map $new; |
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}, |
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); |
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|
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if (0) { #test# |
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# prefetch a few players/second |
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{ |
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my @players; |
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|
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Event->timer (interval => 0.2, data => cf::WF_AUTOCANCEL, cb => sub { |
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@players = map $_->ob->name, cf::player::list unless @players; |
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my $player = cf::player::find_active pop @players |
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or return; |
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|
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if (my $map = $player->ob->map) { |
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prefetch_map $map; |
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} |
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|
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prefetch map => +($player->get_savebed)[0]; |
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}); |
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} |
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|
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# prefetch all .pl files every few minutes (thats only a "few" megabytes) |
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Event->timer (after => 1, interval => 600, data => cf::WF_AUTOCANCEL, cb => sub { |
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my $playerdir = cf::localdir . "/" . cf::playerdir; |
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|
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aio_readdir $playerdir, sub { |
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my ($players) = @_; |
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my $prefetch; $prefetch = sub { |
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my $player = pop @$players |
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or return; |
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|
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load_file "$playerdir/$player/$player.pl", $prefetch; |
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}; |
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|
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$prefetch->(); $prefetch->(); |
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}; |
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}); |
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} |
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|
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