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This commit is contained in:
Eric Petit 2006-02-05 21:10:20 +00:00
parent a2914be847
commit 355fe1273f
1 changed files with 19 additions and 2 deletions
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21
libtransmission/choking.c
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@ -48,6 +48,12 @@ void tr_chokingSetLimit( tr_choking_t * c, int limit )
if( limit < 0 )
c->slots = 4242;
else
/* Reckon a number of slots from the upload limit. There is no
official right way to do this, the formula above e.g. gives:
10 KB/s -> 4 * 2.50 KB/s
20 KB/s -> 6 * 3.33 KB/s
50 KB/s -> 10 * 5.00 KB/s
100 KB/s -> 14 * 7.14 KB/s */
c->slots = lrintf( sqrt( 2 * limit ) );
tr_lockUnlock( &c->lock );
}
@ -96,8 +102,6 @@ void tr_chokingPulse( tr_choking_t * c )
peersCanUnchokeCount = 0;
unchokedCount = 0;
/* Build two lists of interested peers: those who may choke,
those who may unchoke */
for( i = 0; i < c->h->torrentCount; i++ )
{
tor = c->h->torrents[i];
@ -108,6 +112,7 @@ void tr_chokingPulse( tr_choking_t * c )
if( !tr_peerIsConnected( peer ) )
continue;
/* Choke peers who have lost their interest in us */
if( !tr_peerIsInterested( peer ) )
{
if( tr_peerIsUnchoked( peer ) )
@ -115,6 +120,10 @@ void tr_chokingPulse( tr_choking_t * c )
continue;
}
/* Build two lists of interested peers: those we may choke,
those we may unchoke. Whatever happens, we never choke a
peer less than 10 seconds after the time we unchoked him
(or the other way around). */
if( tr_peerIsUnchoked( peer ) )
{
unchokedCount++;
@ -129,11 +138,15 @@ void tr_chokingPulse( tr_choking_t * c )
}
}
/* Sort peers by the rate we are downloading from them. */
sortPeers( peersCanChoke, peersCanChokeCount );
sortPeers( peersCanUnchoke, peersCanUnchokeCount );
if( unchokedCount > c->slots && peersCanChokeCount > 0 )
{
/* We have more open slots than what we should have (the user
has just lower his upload limit. We need to choke some of the
peers we are uploading to. */
int willChoke;
willChoke = MIN( peersCanChokeCount, unchokedCount - c->slots );
for( i = 0; i < willChoke; i++ )
@ -144,6 +157,7 @@ void tr_chokingPulse( tr_choking_t * c )
}
else if( unchokedCount < c->slots && peersCanUnchokeCount > 0 )
{
/* We have unused open slots. Let's unchoke some people. */
int willUnchoke;
willUnchoke = MIN( peersCanUnchokeCount, c->slots - unchokedCount );
for( i = 0; i < willUnchoke; i++ )
@ -153,6 +167,9 @@ void tr_chokingPulse( tr_choking_t * c )
while( peersCanChokeCount > 0 && peersCanUnchokeCount > 0 )
{
/* All slots are used and more peers are waiting. If
applicable, choke some peers in favor of others who are
uploading more to us. */
if( tr_peerDownloadRate( peersCanUnchoke[peersCanUnchokeCount - 1] )
< tr_peerDownloadRate( peersCanChoke[0] ) )
break;