| 1 |
package transferqueue; |
| 2 |
|
| 3 |
use Scalar::Util; |
| 4 |
|
| 5 |
my @reserve = ( |
| 6 |
[ 1_200_000, 1], |
| 7 |
[ 8_000_000, 1], |
| 8 |
[ 75_000_000, 1], |
| 9 |
); |
| 10 |
|
| 11 |
sub new { |
| 12 |
my $class = shift; |
| 13 |
my $self = bless { |
| 14 |
slots => $_[0], |
| 15 |
lastspb => 0, |
| 16 |
avgspb => 0, |
| 17 |
}, $class; |
| 18 |
$self->{reschedule} = Event->timer( |
| 19 |
after => 10, |
| 20 |
interval => 3, |
| 21 |
cb => sub { $self->wake_next }, |
| 22 |
); |
| 23 |
$self; |
| 24 |
} |
| 25 |
|
| 26 |
sub start_transfer { |
| 27 |
my $self = shift; |
| 28 |
my $size = $_[0]; |
| 29 |
|
| 30 |
my $transfer = bless { |
| 31 |
queue => $self, |
| 32 |
time => $::NOW, |
| 33 |
size => $size, |
| 34 |
coro => $Coro::current, |
| 35 |
started => 0, |
| 36 |
}, transfer::; |
| 37 |
|
| 38 |
push @{$self->{wait}}, $transfer; |
| 39 |
|
| 40 |
$self->wake_next; |
| 41 |
|
| 42 |
$transfer; |
| 43 |
} |
| 44 |
|
| 45 |
sub sort { |
| 46 |
my @queue = grep $_, @{$_[0]{wait}}; |
| 47 |
|
| 48 |
$_->{spb} = ($::NOW-$_->{time}) / ($_->{size} || 1) for @queue; |
| 49 |
|
| 50 |
$_[0]{wait} = [sort { $b->{spb} <=> $a->{spb} } @queue]; |
| 51 |
|
| 52 |
Scalar::Util::weaken $_ for @{$_[0]{wait}}; |
| 53 |
} |
| 54 |
|
| 55 |
sub wake_next { |
| 56 |
my $self = shift; |
| 57 |
|
| 58 |
$self->sort; |
| 59 |
|
| 60 |
while (@{$self->{wait}}) { |
| 61 |
my $size = $self->{wait}[0]{size}; |
| 62 |
my $min = 0; |
| 63 |
for (@reserve) { |
| 64 |
last if $size <= $_->[0]; |
| 65 |
$min += $_->[1]; |
| 66 |
} |
| 67 |
last unless $self->{slots} > $min; |
| 68 |
my $transfer = shift @{$self->{wait}}; |
| 69 |
$self->{lastspb} = $transfer->{spb}; |
| 70 |
$self->{avgspb} = $self->{avgspb} * 0.99 + $transfer->{spb} * 0.01; |
| 71 |
$self->{started}++; |
| 72 |
$transfer->wake; |
| 73 |
last; |
| 74 |
} |
| 75 |
} |
| 76 |
|
| 77 |
sub waiters { |
| 78 |
$_[0]->sort; |
| 79 |
@{$_[0]{wait}}; |
| 80 |
} |
| 81 |
|
| 82 |
sub DESTROY { |
| 83 |
my $self = shift; |
| 84 |
|
| 85 |
$self->{reschedule}->cancel; |
| 86 |
} |
| 87 |
|
| 88 |
package transfer; |
| 89 |
|
| 90 |
use Coro::Timer (); |
| 91 |
|
| 92 |
sub wake { |
| 93 |
my $self = shift; |
| 94 |
|
| 95 |
$self->{alloc} = 1; |
| 96 |
$self->{queue}{slots}--; |
| 97 |
$self->{wake} and $self->{wake}->ready; |
| 98 |
} |
| 99 |
|
| 100 |
sub try { |
| 101 |
my $self = shift; |
| 102 |
|
| 103 |
$self->{alloc} || do { |
| 104 |
my $timeout = Coro::Timer::timeout $_[0]; |
| 105 |
local $self->{wake} = $self->{coro}; |
| 106 |
|
| 107 |
Coro::schedule; |
| 108 |
|
| 109 |
$self->{alloc}; |
| 110 |
} |
| 111 |
} |
| 112 |
|
| 113 |
sub DESTROY { |
| 114 |
my $self = shift; |
| 115 |
|
| 116 |
if ($self->{alloc}) { |
| 117 |
$self->{queue}{slots}++; |
| 118 |
$self->{queue}->wake_next; |
| 119 |
} |
| 120 |
} |
| 121 |
|
| 122 |
1; |
| 123 |
|
