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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 1.36 by root, Sun Jun 10 04:24:50 2007 UTC vs.
Revision 1.52 by root, Thu Apr 22 12:50:24 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
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 = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out 8our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out
9our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # 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 = $cf::CFG{save_timeout} || 30; # 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 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 12our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .6; # swap as fast as possible at this load
13 13
14cf::post_init {
14cf::async_ext { 15 cf::async_ext {
16 $Coro::current->{desc} = "startup map scanner";
15 $Coro::current->prio (Coro::PRIO_MIN); 17 $Coro::current->prio (Coro::PRIO_MIN);
16 18
17 # load the header of swapped-out maps. 19 # load the header of swapped-out maps.
18 # this is not a correctness issue, it simply saves diskspace 20 # this is not a correctness issue, it simply saves diskspace
19 # because old files will get cleaned up on reset time 21 # because old files will get cleaned up on reset time
20 Coro::Timer::sleep 0.25; 22 Coro::Timer::sleep 0.25;
21 23
22 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) { 24 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
25 cf::cede_to_tick;
23 cf::map::find $path; 26 cf::map::find $path;
24 cf::wait_for_tick; Coro::cede; 27 }
25 }
26 28
27 # now hunt for resettable per-player maps 29 # now hunt for resettable per-player maps
28 for my $login (@{ cf::player::list_logins or [] }) { 30 for my $login (@{ cf::player::list_logins or [] }) {
29 for my $path (@{ cf::player::maps $login or [] }) { 31 for my $path (@{ cf::player::maps $login or [] }) {
30 Coro::cede; 32 cf::cede_to_tick;
31 33
32 $path =~ /^~[^\/]+(\/.*)$/ 34 $path =~ /^~[^\/]+(\/.*)$/
33 or next; # doh 35 or next; # doh
34 36
35 my $base = cf::map::find $1; 37 my $base = cf::map::find $1;
36 38
37 # skip maps without base maps on the assumption 39 # skip maps without base maps on the assumption
38 # that those are old, unresettable maps 40 # that those are old, unresettable maps
39 next unless $base; 41 next unless $base;
40 42
41 # skip unresettable maps, for speed 43 # skip unresettable maps, for speed
42 next if $base->{deny_reset}; 44 next if $base->{deny_reset};
43 45
44 my $map = cf::map::find $path; 46 my $map = cf::map::find $path;
45 cf::wait_for_tick;
46 47
47 if ($map->{deny_reset}) { 48 if ($map->{deny_reset}) {
48 warn "found noreset map with resettable base map, resetting: $path\n"; 49 warn "found noreset map with resettable base map, resetting: $path\n";
49 delete $map->{deny_reset}; 50 delete $map->{deny_reset};
51 }
50 } 52 }
51 } 53 }
52 } 54 };
53};
54 55
55our $SCHEDULER = cf::async_ext { 56 our $SCHEDULER = cf::async_ext {
56 while () { 57 $Coro::current->{desc} = "map scheduler";
57 Coro::Event::do_timer (after => $SCHEDULE_INTERVAL) 58 $Coro::current->prio (Coro::PRIO_MAX);
58 unless $cf::LOADAVG > $SWAP_LOAD2;
59 59
60 # this weird form of iteration over values is used because 60 while () {
61 # the hash changes underneath us frequently, and for 61 if ($cf::LOADAVG > $SWAP_LOAD2) {
62 # keeps a direct reference to the value without (in 5.8 perls) 62 cf::wait_for_tick;
63 # keeping a reference, so this is prone to crashes or worse. 63 } else {
64 my @maps = keys %cf::MAP; 64 Coro::EV::timer_once $SCHEDULE_INTERVAL;
65 for (@maps) { 65 }
66 my $map = $cf::MAP{$_}
67 or next;
68 $map->valid or next;
69 66
67 # this weird form of iteration over values is used because
68 # the hash changes underneath us frequently, and 'for'
69 # keeps a direct reference to the value without (in 5.8 perls)
70 # keeping a reference, so this is prone to crashes or worse.
71 my @maps = keys %cf::MAP;
72 for (@maps) {
73 my $map = $cf::MAP{$_}
74 or next;
75 $map->valid or next;
76
70 eval { 77 eval {
71 # not yet, because maps might become visible to players nearby 78 # not yet, because maps might become visible to players nearby
72 # we need to remove the map from %cf::MAP and all tiled map links 79 # we need to remove the map from %cf::MAP and all tiled map links
73# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { 80# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
74# $map->deactivate; 81# $map->deactivate;
75# delete $map->{active}; 82# delete $map->{active};
76# } 83# }
77 if ($map->should_reset) { 84 if ($map->should_reset) {
78 $map->reset; 85 $map->reset;
79 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 86 } elsif ($map->in_memory == cf::MAP_ACTIVE) {
80 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT; 87 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, $cf::TICK * 1.5),
88 $cf::TICK * 1.5, $SWAP_TIMEOUT;
81 89
82 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { 90 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
83 $map->swap_out; 91 $map->swap_out;
84 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
85 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 92 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
86 $map->save; 93 $map->save;
87 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; 94 $map->{last_save} -= cf::rndm; # randomise map save times a bit
95 }
88 } 96 }
89 } 97 };
98 warn $@ if $@;
99 cf::cede_to_tick;
90 }; 100 };
91 warn $@ if $@;
92 cf::cede_to_tick;
93 }; 101 }
94 } 102 };
103
104 $SCHEDULER->prio (-2);
95}; 105};
96 106
97$SCHEDULER->prio (-2); 107# purely for debugging, will load ALL maps
108sub loadall {
109 my $maps = cf::map::static_maps;
98 110
111 for my $path (@$maps) {
112 my $map = cf::map::find $path
113 or warn "ERROR: unable to find map $path\n";
114 $map->load;
115 }
116}
117
118

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