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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 1.4 by root, Mon Jan 1 15:32:40 2007 UTC vs.
Revision 1.34 by root, Fri May 11 07:59:59 2007 UTC

1#! perl 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 6
6our $DEACTIVATE_TIMEOUT = 60; # 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
7our $SWAP_TIMEOUT = 70; # 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
8our $SCHEDULE_INTERVAL = 5; # time the map scheduler sleeps between runs 9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # time the map scheduler sleeps between runs
9our $SAVE_TIMEOUT = 40; # save maps every n seconds 10our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds
10our $SAVE_INTERVAL = 0.4; # save at max. one map every $SAVE_INTERVAL 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
11 13
14cf::async_ext {
15 $Coro::current->prio (Coro::PRIO_MIN);
16 # load the header of swapped-out maps.
17 # this is not a correctness issue, it simply saves diskspace
18 # because old files will get cleaned up on reset time
19 Coro::Timer::sleep 1;
20
21 my $files = Coro::AIO::aio_readdir $cf::TMPDIR;
22
23 for my $map (@$files) {
24 utf8::decode $map;
25 next if $map =~ /\.(?:pst|meta)$/;
26 cf::map::find $map;
27 cf::wait_for_tick;
28 }
29
30 #TODO: should also preload random maps...
31};
32
12our $SCHEDULER = cf::coro { 33our $SCHEDULER = cf::async_ext {
13 while () { 34 while () {
14 Coro::Timer::sleep $SCHEDULE_INTERVAL; 35 Coro::Event::do_timer (after => $SCHEDULE_INTERVAL)
36 unless $cf::LOADAVG > $SWAP_LOAD2;
15 37
16 for my $map (values %cf::MAP) { 38 # this weird form of iteration over values is used because
39 # the hash changes underneath us frequently, and for
40 # keeps a direct reference to the value without (in 5.8 perls)
41 # keeping a reference, so this is prone to crashes or worse.
42 my @maps = keys %cf::MAP;
43 for (@maps) {
44 my $map = $cf::MAP{$_}
45 or next;
46 $map->valid or next;
47
17 eval { 48 eval {
18 next if $map->players;
19 # not yet, because maps might become visible to players nearby 49 # not yet, because maps might become visible to players nearby
20 # we need to remove the map from %cf::MAP and all tiled map links 50 # we need to remove the map from %cf::MAP and all tiled map links
21# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { 51# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
22# $map->deactivate; 52# $map->deactivate;
23# delete $map->{active}; 53# delete $map->{active};
24# } 54# }
25 if ($map->should_reset) { 55 if ($map->should_reset) {
26 $map->reset; 56 $map->reset;
27 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 57 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
58 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT;
59
28 if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME) { 60 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
29 $map->swap_out; 61 $map->swap_out;
30 Coro::Timer::sleep $SAVE_INTERVAL; 62 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
31 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 63 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
32 $map->save; 64 $map->save;
33 Coro::Timer::sleep $SAVE_INTERVAL; 65 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
34 } 66 }
35 } 67 }
36 }; 68 };
37 warn $@ if $@; 69 warn $@ if $@;
38 Coro::cede; 70 cf::cede_to_tick;
39 } 71 };
40 } 72 }
41}; 73};
74
42$SCHEDULER->prio (-2); 75$SCHEDULER->prio (-2);
43 76

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