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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 1.22 by root, Sat Jan 13 23:06:13 2007 UTC vs.
Revision 1.54 by root, Wed May 5 23:23:29 2010 UTC

1#! perl # MANDATORY 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# it also contains the map prefetching logic
6 6
7our $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
8our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out 8our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out
9our $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
10our $SAVE_TIMEOUT = 20; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds
11our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load
12our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .6; # swap as fast as possible at this load
11 13
14cf::post_init {
12cf::async_ext { 15 cf::async_ext {
16 $Coro::current->{desc} = "startup map scanner";
13 $Coro::current->prio (Coro::PRIO_MIN); 17 $Coro::current->prio (Coro::PRIO_MIN);
14 # load the header of swapped-out maps.
15 # this is not a correctness issue, it simply saves diskspace
16 # because old files will get cleaned up on reset time
17 Coro::Timer::sleep 1;
18 18
19 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 19 # load the header of swapped-out maps.
20 # this is not a correctness issue, it simply saves diskspace
21 # because old files will get cleaned up on reset time
22 Coro::Timer::sleep 0.25;
20 23
21 for my $map (@$files) { 24 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
22 utf8::decode $map;
23 next if $map =~ /\.(?:pst|meta)$/;
24 $map =~ s/∕/\//g;
25 cf::map::find $map; 25 cf::map::find $path;
26 $cf::WAIT_FOR_TICK_ONE->wait; 26 }
27 }
28 27
29 #TODO: should also preload random maps... 28 # now hunt for resettable per-player maps
30}; 29 for my $login (@{ cf::player::list_logins or [] }) {
30 for my $path (@{ cf::player::maps $login or [] }) {
31 $path =~ /^~[^\/]+(\/.*)$/
32 or next; # doh
31 33
32our $SCHEDULER = cf::async_ext { 34 my $base = cf::map::find $1;
33 while () {
34 Coro::Timer::sleep $SCHEDULE_INTERVAL;
35 35
36 # this weird form of iteration over values is used because 36 # skip maps without base maps on the assumption
37 # the hash changes underneath us frequently, and for 37 # that those are old, unresettable maps
38 # keeps a direct reference to the value without (in 5.8 perls) 38 next unless $base;
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 39
40 # skip unresettable maps, for speed
41 next if $base->{deny_reset};
42
43 my $map = cf::map::find $path;
44
45 if ($map->{deny_reset}) {
46 warn "found noreset map with resettable base map, resetting: $path\n";
47 delete $map->{deny_reset};
48 }
49 }
50 }
51 };
52
53 our $SCHEDULER = cf::async_ext {
54 $Coro::current->{desc} = "map scheduler";
55 $Coro::current->prio (Coro::PRIO_MAX);
56
57 while () {
58 if ($cf::LOADAVG > $SWAP_LOAD2) {
59 cf::wait_for_tick;
60 } else {
61 Coro::EV::timer_once $SCHEDULE_INTERVAL;
62 }
63
64 # this weird form of iteration over values is used because
65 # the hash changes underneath us frequently, and 'for'
66 # keeps a direct reference to the value without (in 5.8 perls)
67 # keeping a reference, so this is prone to crashes or worse.
68 my @maps = keys %cf::MAP;
69 for (@maps) {
70 my $map = $cf::MAP{$_}
71 or next;
72 $map->valid or next;
73
46 eval { 74 eval {
47 # not yet, because maps might become visible to players nearby 75 # not yet, because maps might become visible to players nearby
48 # we need to remove the map from %cf::MAP and all tiled map links 76 # we need to remove the map from %cf::MAP and all tiled map links
49# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { 77# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
50# $map->deactivate; 78# $map->deactivate;
51# delete $map->{active}; 79# delete $map->{active};
52# } 80# }
53 if ($map->should_reset) { 81 if ($map->should_reset) {
54 $map->reset; 82 $map->reset;
55 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 83 } elsif ($map->in_memory == cf::MAP_ACTIVE) {
84 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, $cf::TICK * 1.5),
85 $cf::TICK * 1.5, $SWAP_TIMEOUT;
86
56 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { 87 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
57 $cf::WAIT_FOR_TICK_ONE->wait;
58 $map->swap_out; 88 $map->swap_out;
59 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 89 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
60 $cf::WAIT_FOR_TICK_ONE->wait;
61 $map->save; 90 $map->save;
91 $map->{last_save} -= cf::rndm; # randomise map save times a bit
92 }
62 } 93 }
63 } 94 };
95 warn $@ if $@;
96 cf::cede_to_tick;
64 }; 97 };
65 warn $@ if $@;
66 Coro::cede;
67 }; 98 }
68 } 99 };
100
101 $SCHEDULER->prio (-2);
69}; 102};
70 103
71$SCHEDULER->prio (-2); 104# purely for debugging, will load ALL maps
105sub loadall {
106 my $maps = cf::map::static_maps;
72 107
108 for my $path (@$maps) {
109 my $map = cf::map::find $path
110 or warn "ERROR: unable to find map $path\n";
111 $map->load;
112 }
113}
114

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