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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 |
8 | our $SWAP_TIMEOUT = $cf::CFG{swap_timeout} || 40; # 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 |
9 | our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || 5; # time the map scheduler sleeps between runs |
9 | our $SCHEDULE_INTERVAL = $cf::CFG{schedule_interval} || .8; # time the map scheduler sleeps between runs |
10 | our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 20; # save maps every n seconds |
10 | our $SAVE_TIMEOUT = $cf::CFG{save_timeout} || 30; # save maps every n seconds |
11 | our $MAX_ACTIVES = $cf::CFG{max_actives} || 200000; # swap aggressively when > this many objects are active |
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} || .4; # swap as fast as possible at this load |
12 | |
13 | |
13 | cf::async_ext { |
14 | cf::async_ext { |
14 | $Coro::current->prio (Coro::PRIO_MIN); |
15 | $Coro::current->prio (Coro::PRIO_MIN); |
15 | # load the header of swapped-out maps. |
16 | # load the header of swapped-out maps. |
16 | # this is not a correctness issue, it simply saves diskspace |
17 | # this is not a correctness issue, it simply saves diskspace |
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29 | #TODO: should also preload random maps... |
30 | #TODO: should also preload random maps... |
30 | }; |
31 | }; |
31 | |
32 | |
32 | our $SCHEDULER = cf::async_ext { |
33 | our $SCHEDULER = cf::async_ext { |
33 | while () { |
34 | while () { |
34 | Coro::Event::do_timer (after => $SCHEDULE_INTERVAL); |
35 | Coro::Event::do_timer (after => $SCHEDULE_INTERVAL) |
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36 | unless $cf::LOADAVG > $SWAP_LOAD2; |
35 | |
37 | |
36 | # this weird form of iteration over values is used because |
38 | # this weird form of iteration over values is used because |
37 | # the hash changes underneath us frequently, and for |
39 | # the hash changes underneath us frequently, and for |
38 | # keeps a direct reference to the value without (in 5.8 perls) |
40 | # keeps a direct reference to the value without (in 5.8 perls) |
39 | # keeping a reference, so this is prone to crashes or worse. |
41 | # keeping a reference, so this is prone to crashes or worse. |
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51 | # delete $map->{active}; |
53 | # delete $map->{active}; |
52 | # } |
54 | # } |
53 | if ($map->should_reset) { |
55 | if ($map->should_reset) { |
54 | $map->reset; |
56 | $map->reset; |
55 | } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { |
57 | } elsif ($map->in_memory == cf::MAP_IN_MEMORY) { |
56 | my $max_idle = cf::object::actives_size > $MAX_ACTIVES ? 1 : $SWAP_TIMEOUT; |
58 | my $max_idle = cf::clamp +(cf::lerp $cf::LOADAVG, $SWAP_LOAD1, $SWAP_LOAD2, $SWAP_TIMEOUT, 0), 0, $SWAP_TIMEOUT; |
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59 | |
57 | if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { |
60 | if ($map->last_access + $max_idle <= $cf::RUNTIME && !$map->players) { |
58 | $map->swap_out; |
61 | $map->swap_out; |
59 | cf::wait_for_tick unless $max_idle == 1; |
62 | cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; |
60 | } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
63 | } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) { |
61 | $map->save; |
64 | $map->save; |
62 | cf::wait_for_tick unless $max_idle == 1; |
65 | cf::wait_for_tick unless $cf::LOADAVG > $SWAP_LOAD2; |
63 | } |
66 | } |
64 | } |
67 | } |
65 | }; |
68 | }; |
66 | warn $@ if $@; |
69 | warn $@ if $@; |
67 | Coro::cede; |
70 | cf::cede_to_tick; |
68 | }; |
71 | }; |
69 | } |
72 | } |
70 | }; |
73 | }; |
71 | |
74 | |
72 | $SCHEDULER->prio (-2); |
75 | $SCHEDULER->prio (-2); |