1 | package transferqueue; |
1 | package transferqueue; |
2 | |
2 | |
3 | sub new { |
3 | sub new { |
4 | my $class = shift; |
4 | my $class = shift; |
5 | bless { |
5 | bless { |
6 | conns => $_[0], |
6 | slots => $_[0], |
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7 | lastspb => 0, |
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8 | avgspb => 0, |
7 | }, $class; |
9 | }, $class; |
8 | } |
10 | } |
9 | |
11 | |
10 | sub start_transfer { |
12 | sub start_transfer { |
11 | my $self = shift; |
13 | my $self = shift; |
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14 | my $size = $_[0]; |
12 | |
15 | |
13 | my $trans = bless [ $self ], transfer::; |
16 | my $transfer = bless { |
14 | Scalar::Util::weaken($trans->[0]); |
17 | queue => $self, |
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18 | time => $::NOW, |
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19 | size => $size, |
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20 | coro => $Coro::current, |
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21 | started => 0, |
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22 | }, transfer::; |
15 | |
23 | |
16 | push @{$self->{wait}}, $trans; |
24 | push @{$self->{wait}}, $transfer; |
17 | Scalar::Util::weaken($self->{wait}[-1]); |
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18 | |
25 | |
19 | if (--$self->{conns} >= 0) { |
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20 | $self->wake_next; |
26 | $self->wake_next; |
21 | } |
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22 | |
27 | |
23 | $trans; |
28 | $transfer; |
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29 | } |
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30 | |
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31 | sub sort { |
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32 | my @queue = grep $_, @{$_[0]{wait}}; |
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33 | |
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34 | $_->{spb} = ($::NOW-$_->{time}) / ($_->{size} || 1) for @queue; |
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35 | |
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36 | $_[0]{wait} = [sort { $b->{spb} <=> $a->{spb} } @queue]; |
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37 | |
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38 | Scalar::Util::weaken $_ for @{$_[0]{wait}}; |
24 | } |
39 | } |
25 | |
40 | |
26 | sub wake_next { |
41 | sub wake_next { |
27 | my $self = shift; |
42 | my $self = shift; |
28 | |
43 | |
29 | if ($self->{conns} >= 0) { |
44 | $self->sort; |
30 | while(@{$self->{wait}}) { |
45 | |
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46 | while($self->{slots} > 0 && @{$self->{wait}}) { |
31 | my $transfer = shift @{$self->{wait}}; |
47 | my $transfer = shift @{$self->{wait}}; |
32 | if ($transfer) { |
48 | if ($transfer) { |
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49 | $self->{lastspb} = $transfer->{spb}; |
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50 | $self->{avgspb} ||= $transfer->{spb}; |
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51 | $self->{avgspb} = $self->{avgspb} * 0.95 + $transfer->{spb} * 0.05; |
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52 | $self->{started}++; |
33 | $transfer->wake; |
53 | $transfer->wake; |
34 | last; |
54 | last; |
35 | } |
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36 | } |
55 | } |
37 | } |
56 | } |
38 | } |
57 | } |
39 | |
58 | |
40 | sub waiters { |
59 | sub waiters { |
41 | map $_->[1], @{$_[0]{wait}}; |
60 | $_[0]->sort; |
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61 | @{$_[0]{wait}}; |
42 | } |
62 | } |
43 | |
63 | |
44 | package transfer; |
64 | package transfer; |
45 | |
65 | |
46 | use Coro::Timer (); |
66 | use Coro::Timer (); |
47 | |
67 | |
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68 | sub wake { |
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69 | my $self = shift; |
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70 | |
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71 | $self->{alloc} = 1; |
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72 | $self->{queue}{slots}--; |
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73 | $self->{wake} and $self->{wake}->ready; |
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74 | } |
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75 | |
48 | sub try { |
76 | sub try { |
49 | my $self = shift; |
77 | my $self = shift; |
50 | my $timeout = Coro::Timer::timeout $_[0]; |
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51 | |
78 | |
52 | unless ($self->[2]) { |
79 | $self->{alloc} || do { |
53 | local $self->[1] = $Coro::current; |
80 | my $timeout = Coro::Timer::timeout $_[0]; |
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81 | local $self->{wake} = $self->{coro}; |
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82 | |
54 | Coro::schedule; |
83 | Coro::schedule; |
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84 | |
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85 | $self->{alloc}; |
55 | } |
86 | } |
56 | |
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57 | return $self->[2]; |
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58 | } |
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59 | |
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60 | sub wake { |
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61 | my $self = shift; |
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62 | $self->[2] = 1; |
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63 | ref $self->[1] and $self->[1]->ready; |
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64 | } |
87 | } |
65 | |
88 | |
66 | sub DESTROY { |
89 | sub DESTROY { |
67 | my $self = shift; |
90 | my $self = shift; |
68 | $self->[0]{conns}++; |
91 | |
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92 | if ($self->{alloc}) { |
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93 | $self->{queue}{slots}++; |
69 | $self->[0]->wake_next; |
94 | $self->{queue}->wake_next; |
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95 | } |
70 | } |
96 | } |
71 | |
97 | |
72 | package conn; |
98 | package conn; |
73 | |
99 | |
74 | our %blockuri; |
100 | our %blockuri; |