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another rate limiter optimization attempt

This commit is contained in:
Arvid Norberg 2014-01-17 07:48:38 +00:00
parent fa6818e757
commit 20184a9a22
3 changed files with 26 additions and 5 deletions
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1
ChangeLog
View File

@ -1,3 +1,4 @@
* rate limiter optimization
* rate limiter overflow fix (for very high limits)
* non-auto-managed torrents no longer count against the torrent limits
* handle DHT error responses correctly

13
include/libtorrent/bandwidth_limit.hpp
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@ -64,6 +64,19 @@ struct TORRENT_EXTRA_EXPORT bandwidth_channel
void return_quota(int amount);
void use_quota(int amount);
// this is an optimization. If there is more than one second
// of quota built up in this channel, just apply it right away
// instead of introducing a delay to split it up evenly. This
// should especially help in situations where a single peer
// has a capacity under the rate limit, but would otherwise be
// held back by the latency of getting bandwidth from the limiter
bool need_queueing(int amount)
{
if (m_quota_left - amount < m_limit) return true;
m_quota_left -= amount;
return false;
}
// used as temporary storage while distributing
// bandwidth
int tmp;

17
src/bandwidth_manager.cpp
View File

@ -102,11 +102,17 @@ namespace libtorrent
bw_request bwr(peer, blk, priority);
int i = 0;
if (chan1 && chan1->throttle() > 0) bwr.channel[i++] = chan1;
if (chan2 && chan2->throttle() > 0) bwr.channel[i++] = chan2;
if (chan3 && chan3->throttle() > 0) bwr.channel[i++] = chan3;
if (chan4 && chan4->throttle() > 0) bwr.channel[i++] = chan4;
if (chan5 && chan5->throttle() > 0) bwr.channel[i++] = chan5;
if (chan1 && chan1->throttle() > 0 && chan1->need_queueing(blk))
bwr.channel[i++] = chan1;
if (chan2 && chan2->throttle() > 0 && chan2->need_queueing(blk))
bwr.channel[i++] = chan2;
if (chan3 && chan3->throttle() > 0 && chan3->need_queueing(blk))
bwr.channel[i++] = chan3;
if (chan4 && chan4->throttle() > 0 && chan4->need_queueing(blk))
bwr.channel[i++] = chan4;
if (chan5 && chan5->throttle() > 0 && chan5->need_queueing(blk))
bwr.channel[i++] = chan5;
if (i == 0)
{
// the connection is not rate limited by any of its
@ -115,6 +121,7 @@ namespace libtorrent
// the queue, just satisfy the request immediately
return blk;
}
m_queued_bytes += blk;
m_queue.push_back(bwr);
return 0;