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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 1.56 by root, Wed May 4 07:36:40 2011 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::async_ext { 14sub reload {
15 local $Coro::current->{desc} = "startup map scanner";
15 $Coro::current->prio (Coro::PRIO_MIN); 16 $Coro::current->prio (Coro::PRIO_MIN);
16 17
17 # load the header of swapped-out maps. 18 # load the header of swapped-out maps.
18 # this is not a correctness issue, it simply saves diskspace 19 # this is not a correctness issue, it simply saves diskspace
19 # because old files will get cleaned up on reset time 20 # because old files will get cleaned up on reset time
20 Coro::Timer::sleep 0.25;
21 21
22 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) { 22 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
23 cf::map::find $path; 23 cf::map::find $path;
24 cf::wait_for_tick; Coro::cede;
25 } 24 }
26 25
27 # now hunt for resettable per-player maps 26 # now hunt for resettable per-player maps
28 for my $login (@{ cf::player::list_logins or [] }) { 27 for my $login (@{ cf::player::list_logins or [] }) {
29 for my $path (@{ cf::player::maps $login or [] }) { 28 for my $path (@{ cf::player::maps $login or [] }) {
30 Coro::cede;
31
32 $path =~ /^~[^\/]+(\/.*)$/ 29 $path =~ /^~[^\/]+(\/.*)$/
33 or next; # doh 30 or next; # doh
34 31
35 my $base = cf::map::find $1; 32 my $base = cf::map::find $1;
36 33
… …
40 37
41 # skip unresettable maps, for speed 38 # skip unresettable maps, for speed
42 next if $base->{deny_reset}; 39 next if $base->{deny_reset};
43 40
44 my $map = cf::map::find $path; 41 my $map = cf::map::find $path;
45 cf::wait_for_tick;
46 42
47 if ($map->{deny_reset}) { 43 if ($map->{deny_reset}) {
48 warn "found noreset map with resettable base map, resetting: $path\n"; 44 warn "found noreset map with resettable base map, resetting: $path\n";
49 delete $map->{deny_reset}; 45 delete $map->{deny_reset};
50 } 46 }
51 } 47 }
52 } 48 }
53}; 49}
54 50
55our $SCHEDULER = cf::async_ext { 51cf::post_init {
56 while () { 52 cf::async { reload };
57 Coro::Event::do_timer (after => $SCHEDULE_INTERVAL)
58 unless $cf::LOADAVG > $SWAP_LOAD2;
59 53
60 # this weird form of iteration over values is used because 54 our $SCHEDULER = cf::async_ext {
61 # the hash changes underneath us frequently, and for 55 $Coro::current->{desc} = "map scheduler";
62 # keeps a direct reference to the value without (in 5.8 perls) 56 $Coro::current->prio (Coro::PRIO_MAX);
63 # keeping a reference, so this is prone to crashes or worse.
64 my @maps = keys %cf::MAP;
65 for (@maps) {
66 my $map = $cf::MAP{$_}
67 or next;
68 $map->valid or next;
69 57
58 while () {
59 if ($cf::LOADAVG > $SWAP_LOAD2) {
60 cf::wait_for_tick;
61 } else {
62 Coro::EV::timer_once $SCHEDULE_INTERVAL;
63 }
64
65 # this weird form of iteration over values is used because
66 # the hash changes underneath us frequently, and 'for'
67 # keeps a direct reference to the value without (in 5.8 perls)
68 # keeping a reference, so this is prone to crashes or worse.
69 my @maps = keys %cf::MAP;
70 for (@maps) {
71 my $map = $cf::MAP{$_}
72 or next;
73 $map->valid or next;
74
70 eval { 75 eval {
71 # not yet, because maps might become visible to players nearby 76 # not yet, because maps might become visible to players nearby
72 # we need to remove the map from %cf::MAP and all tiled map links 77 # we need to remove the map from %cf::MAP and all tiled map links
73# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { 78# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
74# $map->deactivate; 79# $map->deactivate;
75# delete $map->{active}; 80# delete $map->{active};
76# } 81# }
77 if ($map->should_reset) { 82 if ($map->should_reset) {
78 $map->reset; 83 $map->reset;
79 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 84 } elsif ($map->linkable) {
80 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT; 85 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, $cf::TICK * 1.5),
86 $cf::TICK * 1.5, $SWAP_TIMEOUT;
81 87
82 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { 88 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
83 $map->swap_out; 89 $map->swap_out;
84 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
85 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 90 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
86 $map->save; 91 $map->save;
87 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; 92 $map->{last_save} -= cf::rndm; # randomise map save times a bit
93 }
88 } 94 }
89 } 95 };
96 warn $@ if $@;
97 cf::cede_to_tick;
90 }; 98 };
91 warn $@ if $@;
92 cf::cede_to_tick;
93 }; 99 }
94 } 100 };
101
102 $SCHEDULER->prio (-2);
95}; 103};
96 104
97$SCHEDULER->prio (-2); 105# purely for debugging, will load ALL maps
106sub loadall {
107 my $maps = cf::map::static_maps;
98 108
109 for my $path (@$maps) {
110 my $map = cf::map::find $path
111 or warn "ERROR: unable to find map $path\n";
112 $map->load;
113 }
114}
115

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