| Revision: | 1.4 |
| Committed: | Sun Dec 4 19:36:28 2005 UTC (18 years, 7 months ago) by root |
| Content type: | text/plain |
| Branch: | MAIN |
| CVS Tags: | rel-2_5, rel-4_22, rel-4_21, rel-4_0, rel-4_3, rel-3_41, rel-4_13, rel-4_11, rel-3_55, rel-3_51, rel-4_01, rel-4_03, rel-4_02, rel-2_0, rel-2_1, rel-1_9, rel-3_6, rel-3_62, rel-3_63, rel-3_61, rel-1_7, rel-1_6, rel-3_4, rel-3_1, rel-3_5, rel-3_3, rel-3_2, rel-3_0, rel-3_01, rel-3_11, rel-4_1, rel-4_2, stack_sharing, rel-3_501, rel-4_31 |
| Changes since 1.3: | +1 -1 lines |
| Log Message: | *** empty log message *** |
| # | Content |
|---|---|
| 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} * 0.999 + $transfer->{spb} * 0.001; |
| 71 | $self->{started}++; |
| 72 | $transfer->wake; |
| 73 | last; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | sub force_wake_next { |
| 78 | my $self = shift; |
| 79 | |
| 80 | $self->{slots} += $::MAX_TRANSFERS; |
| 81 | $self->wake_next; |
| 82 | $self->{slots} -= $::MAX_TRANSFERS; |
| 83 | } |
| 84 | |
| 85 | sub waiters { |
| 86 | $_[0]->sort; |
| 87 | @{$_[0]{wait}}; |
| 88 | } |
| 89 | |
| 90 | sub DESTROY { |
| 91 | my $self = shift; |
| 92 | |
| 93 | $self->{reschedule}->cancel; |
| 94 | } |
| 95 | |
| 96 | package transfer; |
| 97 | |
| 98 | use Coro::Timer (); |
| 99 | |
| 100 | sub wake { |
| 101 | my $self = shift; |
| 102 | |
| 103 | $self->{alloc} = 1; |
| 104 | $self->{queue}{slots}--; |
| 105 | $self->{wake} and $self->{wake}->ready; |
| 106 | } |
| 107 | |
| 108 | sub try { |
| 109 | my $self = shift; |
| 110 | |
| 111 | $self->{alloc} || do { |
| 112 | my $timeout = Coro::Timer::timeout $_[0]; |
| 113 | local $self->{wake} = $self->{coro}; |
| 114 | |
| 115 | Coro::schedule; |
| 116 | |
| 117 | $self->{alloc}; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | sub DESTROY { |
| 122 | my $self = shift; |
| 123 | |
| 124 | if ($self->{alloc}) { |
| 125 | $self->{queue}{slots}++; |
| 126 | $self->{queue}->wake_next; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | 1; |
| 131 |