ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/deliantra/server/ext/map-scheduler.ext
(Generate patch)

Comparing deliantra/server/ext/map-scheduler.ext (file contents):
Revision 1.35 by root, Sun Jun 10 04:05:47 2007 UTC vs.
Revision 1.43 by root, Wed Sep 19 21:57:26 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
… …
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} || .4; # swap as fast as possible at this load
13 13
14cf::async_ext { 14cf::async_ext {
15 $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 Coro::Timer::sleep 0.25;
21 22
22 for my $map (@{ cf::map::tmp_maps or [] }) { 23 for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) {
24 cf::cede_to_tick;
23 cf::map::find $map; 25 cf::map::find $path;
24 cf::wait_for_tick; Coro::cede;
25 } 26 }
26
27 #TODO: should also preload random maps...
28 27
29 # now hunt for resettable per-player maps 28 # now hunt for resettable per-player maps
30 for my $login (@{ cf::player::list_logins or [] }) { 29 for my $login (@{ cf::player::list_logins or [] }) {
31 for my $path (@{ cf::player::maps $login or [] }) { 30 for my $path (@{ cf::player::maps $login or [] }) {
32 Coro::cede; 31 cf::cede_to_tick;
33 32
34 $path =~ /^~[^\/]+(\/.*)$/ 33 $path =~ /^~[^\/]+(\/.*)$/
35 or next; # doh 34 or next; # doh
36 35
37 my $base = cf::map::find $1; 36 my $base = cf::map::find $1;
… …
42 41
43 # skip unresettable maps, for speed 42 # skip unresettable maps, for speed
44 next if $base->{deny_reset}; 43 next if $base->{deny_reset};
45 44
46 my $map = cf::map::find $path; 45 my $map = cf::map::find $path;
47 cf::wait_for_tick;
48 46
49 if ($map->{deny_reset}) { 47 if ($map->{deny_reset}) {
50 warn "found noreset map with resettable base map, resetting: $path\n"; 48 warn "found noreset map with resettable base map, resetting: $path\n";
51 delete $map->{deny_reset}; 49 delete $map->{deny_reset};
52 } 50 }
53 } 51 }
54 } 52 }
55}; 53};
56 54
57our $SCHEDULER = cf::async_ext { 55our $SCHEDULER = cf::async_ext {
56 $Coro::current->{desc} = "map scheduler";
57 my $timer = Coro::Event->timer (after => 1);
58
58 while () { 59 while () {
59 Coro::Event::do_timer (after => $SCHEDULE_INTERVAL) 60 $timer->interval ($SCHEDULE_INTERVAL);
60 unless $cf::LOADAVG > $SWAP_LOAD2; 61 $timer->next unless $cf::LOADAVG > $SWAP_LOAD2;
61 62
62 # this weird form of iteration over values is used because 63 # this weird form of iteration over values is used because
63 # the hash changes underneath us frequently, and for 64 # the hash changes underneath us frequently, and for
64 # keeps a direct reference to the value without (in 5.8 perls) 65 # keeps a direct reference to the value without (in 5.8 perls)
65 # keeping a reference, so this is prone to crashes or worse. 66 # keeping a reference, so this is prone to crashes or worse.
… …
77# delete $map->{active}; 78# delete $map->{active};
78# } 79# }
79 if ($map->should_reset) { 80 if ($map->should_reset) {
80 $map->reset; 81 $map->reset;
81 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { 82 } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
82 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT; 83 my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, $cf::TICK * 1.5),
84 $cf::TICK * 1.5, $SWAP_TIMEOUT;
83 85
84 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { 86 if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) {
85 $map->swap_out; 87 $map->swap_out;
86 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2;
87 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { 88 } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
88 $map->save; 89 $map->save;
89 cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; 90 $map->{last_save} -= rand; # randomise map save times a bit
90 } 91 }
91 } 92 }
92 }; 93 };
93 warn $@ if $@; 94 warn $@ if $@;
94 cf::cede_to_tick; 95 cf::cede_to_tick;

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines