| 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. |
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5 | # it also contains the map prefetching logic |
| 5 | |
6 | |
| 6 | 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 |
| 7 | our $SWAP_TIMEOUT = 50; # number of seconds after which maps inactive get swapped out |
8 | our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 300; # number of seconds after which inactive maps get swapped out |
| 8 | our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs |
9 | our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || 5; # time the map scheduler sleeps between runs |
| 9 | our $SAVE_TIMEOUT = 30; # save maps every n seconds |
10 | our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds |
| 10 | our $SAVE_INTERVAL = 0.3; # save at max. one map every $SAVE_INTERVAL |
11 | our $SWAP_LOAD1 = $cf::CFG{swap_load1} || .1; # start aggressively swapping at this load |
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12 | our $SWAP_LOAD2 = $cf::CFG{swap_load2} || .6; # swap as fast as possible at this load |
| 11 | |
13 | |
| 12 | our $SCHEDULER = cf::coro { |
14 | cf::post_init { |
| 13 | while () { |
15 | cf::async_ext { |
| 14 | Coro::Timer::sleep $SCHEDULE_INTERVAL; |
16 | $Coro::current->{desc} = "startup map scanner"; |
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17 | $Coro::current->prio (Coro::PRIO_MIN); |
| 15 | |
18 | |
| 16 | # this weird form of iteration over values is used because |
19 | # load the header of swapped-out maps. |
| 17 | # the hash changes underneath us frequently, and for |
20 | # this is not a correctness issue, it simply saves diskspace |
| 18 | # keeps a direct reference to the value without (in 5.8 perls) |
21 | # because old files will get cleaned up on reset time |
| 19 | # keeping a reference, so this is prone to crashes or worse. |
22 | Coro::Timer::sleep 0.25; |
| 20 | my @maps = keys %cf::MAP; |
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| 21 | for (@maps) { |
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| 22 | my $map = $cf::MAP{$_} |
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| 23 | or next; |
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| 24 | $map->valid or next; |
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| 25 | |
23 | |
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24 | for my $path (@{ cf::map::tmp_maps or [] }, @{ cf::map::random_maps or [] }) { |
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25 | cf::cede_to_tick; |
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26 | cf::map::find $path; |
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27 | } |
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28 | |
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29 | # now hunt for resettable per-player maps |
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30 | for my $login (@{ cf::player::list_logins or [] }) { |
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31 | for my $path (@{ cf::player::maps $login or [] }) { |
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32 | cf::cede_to_tick; |
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33 | |
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34 | $path =~ /^~[^\/]+(\/.*)$/ |
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35 | or next; # doh |
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36 | |
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37 | my $base = cf::map::find $1; |
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38 | |
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39 | # skip maps without base maps on the assumption |
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40 | # that those are old, unresettable maps |
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41 | next unless $base; |
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42 | |
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43 | # skip unresettable maps, for speed |
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44 | next if $base->{deny_reset}; |
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45 | |
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46 | my $map = cf::map::find $path; |
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47 | |
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48 | if ($map->{deny_reset}) { |
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49 | warn "found noreset map with resettable base map, resetting: $path\n"; |
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50 | delete $map->{deny_reset}; |
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51 | } |
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52 | } |
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53 | } |
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54 | }; |
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55 | |
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56 | our $SCHEDULER = cf::async_ext { |
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57 | $Coro::current->{desc} = "map scheduler"; |
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58 | $Coro::current->prio (Coro::PRIO_MAX); |
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59 | |
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60 | while () { |
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61 | if ($cf::LOADAVG > $SWAP_LOAD2) { |
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62 | cf::wait_for_tick; |
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63 | } else { |
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64 | Coro::EV::timer_once $SCHEDULE_INTERVAL; |
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65 | } |
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66 | |
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67 | # this weird form of iteration over values is used because |
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68 | # the hash changes underneath us frequently, and for |
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69 | # keeps a direct reference to the value without (in 5.8 perls) |
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70 | # keeping a reference, so this is prone to crashes or worse. |
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71 | my @maps = keys %cf::MAP; |
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72 | for (@maps) { |
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73 | my $map = $cf::MAP{$_} |
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74 | or next; |
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75 | $map->valid or next; |
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76 | |
| 26 | eval { |
77 | eval { |
| 27 | # not yet, because maps might become visible to players nearby |
78 | # not yet, because maps might become visible to players nearby |
| 28 | # we need to remove the map from %cf::MAP and all tiled map links |
79 | # we need to remove the map from %cf::MAP and all tiled map links |
| 29 | # if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { |
80 | # if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) { |
| 30 | # $map->deactivate; |
81 | # $map->deactivate; |
| 31 | # delete $map->{active}; |
82 | # delete $map->{active}; |
| 32 | # } |
83 | # } |
| 33 | if ($map->should_reset) { |
84 | if ($map->should_reset) { |
| 34 | $map->reset; |
85 | $map->reset; |
| 35 | } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { |
86 | } elsif ($map->in_memory == cf::MAP_ACTIVE) { |
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87 | my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, $cf::TICK * 1.5), |
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88 | $cf::TICK * 1.5, $SWAP_TIMEOUT; |
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89 | |
| 36 | if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) { |
90 | if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { |
| 37 | $map->swap_out; |
91 | $map->swap_out; |
| 38 | Coro::Timer::sleep $SAVE_INTERVAL; |
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| 39 | } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
92 | } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
| 40 | $map->save; |
93 | $map->save; |
| 41 | Coro::Timer::sleep $SAVE_INTERVAL; |
94 | $map->{last_save} -= rand; # randomise map save times a bit |
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95 | } |
| 42 | } |
96 | } |
| 43 | } |
97 | }; |
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98 | warn $@ if $@; |
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99 | cf::cede_to_tick; |
| 44 | }; |
100 | }; |
| 45 | warn $@ if $@; |
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| 46 | Coro::cede; |
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| 47 | }; |
101 | } |
| 48 | } |
102 | }; |
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103 | |
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104 | $SCHEDULER->prio (-2); |
| 49 | }; |
105 | }; |
| 50 | |
106 | |
| 51 | $SCHEDULER->prio (-2); |
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| 52 | |
107 | |
