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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 1.26 by root, Tue Jan 23 01:17:08 2007 UTC vs.
Revision 1.40 by root, Sat Jul 28 14:32:21 2007 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
7#our $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} || .8; # 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 $MAX_ACTIVES = $cf::CFG{max_actives} || 200000; # swap aggressively when > this many objects are active 11our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load
12our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .4; # swap as fast as possible at this load
12 13
13cf::async_ext { 14cf::async_ext {
14 $Coro::current->prio (Coro::PRIO_MIN); 15 $Coro::current->prio (Coro::PRIO_MIN);
16
15 # load the header of swapped-out maps. 17 # load the header of swapped-out maps.
16 # this is not a correctness issue, it simply saves diskspace 18 # this is not a correctness issue, it simply saves diskspace
17 # because old files will get cleaned up on reset time 19 # because old files will get cleaned up on reset time
18 Coro::Timer::sleep 1; 20 Coro::Timer::sleep 0.25;
19 21
20 my $files = Coro::AIO::aio_readdir cf::localdir . "/" . cf::tmpdir; 22 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
21 23 cf::cede_to_tick;
22 for my $map (@$files) {
23 utf8::decode $map;
24 next if $map =~ /\.(?:pst|meta)$/;
25 $map =~ s/∕/\//g;
26 $map =~ s/\.map$//;
27 cf::map::find $map; 24 cf::map::find $path;
28 $cf::WAIT_FOR_TICK_ONE->wait;
29 } 25 }
30 26
31 #TODO: should also preload random maps... 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 }
32}; 52};
33 53
34our $SCHEDULER = cf::async_ext { 54our $SCHEDULER = cf::async_ext {
35 my $schedule_interval = Coro::Event->timer (after => 1, interval => $SCHEDULE_INTERVAL); 55 my $timer = Coro::Event->timer (after => 1);
56
36 while () { 57 while () {
37 $schedule_interval->next; 58 $timer->interval ($SCHEDULE_INTERVAL);
59 $timer->next unless $cf::LOADAVG > $SWAP_LOAD2;
38 60
39 # this weird form of iteration over values is used because 61 # this weird form of iteration over values is used because
40 # the hash changes underneath us frequently, and for 62 # the hash changes underneath us frequently, and for
41 # keeps a direct reference to the value without (in 5.8 perls) 63 # keeps a direct reference to the value without (in 5.8 perls)
42 # keeping a reference, so this is prone to crashes or worse. 64 # keeping a reference, so this is prone to crashes or worse.
… …
54# delete $map->{active}; 76# delete $map->{active};
55# } 77# }
56 if ($map->should_reset) { 78 if ($map->should_reset) {
57 $map->reset; 79 $map->reset;
58 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 80 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
59 my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT; 81 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT;
82
60 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { 83 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
61 $map->swap_out; 84 $map->swap_out;
62 $cf::WAIT_FOR_TICK_ONE->wait;
63 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 85 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
64 $map->save; 86 $map->save;
65 $cf::WAIT_FOR_TICK_ONE->wait; 87 $map->{last_save} -= rand; # randomise map save times a bit
66 } 88 }
67 } 89 }
68 }; 90 };
69 warn $@ if $@; 91 warn $@ if $@;
70 Coro::cede; 92 cf::cede_to_tick;
71 }; 93 };
72 } 94 }
73}; 95};
74 96
75$SCHEDULER->prio (-2); 97$SCHEDULER->prio (-2);

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