bugmenot Posted July 11, 2009 Report Share Posted July 11, 2009 Something I noticed with the latest version of μTorrent (1.8.3, build 15772):When I set my upload limit to "Unlimited", the upload speed reliably and instantly drops to about 20 KB/s and stays there. When I manually set it to a value that exceeds my maximum upload speed, it uploads just fine. Link to comment Share on other sites More sharing options...
Switeck Posted July 11, 2009 Report Share Posted July 11, 2009 I blame your other settings.I don't know what they are...but they're probably really bad. Either that, or you have a couple uTP connections...or Teredo/IPv6 connections that go "nuts" when attempting to upload to them at unlimited speeds. Link to comment Share on other sites More sharing options...
bugmenot Posted August 22, 2009 Author Report Share Posted August 22, 2009 Hello,some odditiy I noticed: When I don't limit my upload speed, µTorrent won't use the full potential of my connection.I'm capable of pushing ~128 KB/s, but whenever I use "Unlimited", the upload rate instantly drops to about 50 KB/s. I thought maybe I was congesting my network, but no, when I set the limit to something higher than 128 it uploads just fine.So, what is happening here? Is anyone else experiencing this?Edit: Switeck, IT IS A BUGMENOT ACCOUNT. Rawr~ Link to comment Share on other sites More sharing options...
Switeck Posted August 22, 2009 Report Share Posted August 22, 2009 My explanation is above... Link to comment Share on other sites More sharing options...
bugmenot Posted August 22, 2009 Author Report Share Posted August 22, 2009 But Unlimited and a limit far above my max. upload speed should behave the same way, right? So why is this only happening with Unlimited? Link to comment Share on other sites More sharing options...
Switeck Posted August 22, 2009 Report Share Posted August 22, 2009 I blame your other settings and torrent conditions, which you've told me essentially nothing about. Link to comment Share on other sites More sharing options...
bugmenot Posted August 22, 2009 Author Report Share Posted August 22, 2009 Well OK. My bandwidth settings are basically the Speed Guide settings for 1 Mb/s.Other than that, I disabled local peer discovery, enabled uTP (bt.transp_disposition = 15) and outgoing protocol encryption.Here's some screenshots: Connection, Bandwidth, BitTorrent, Queueing. Link to comment Share on other sites More sharing options...
Switeck Posted August 22, 2009 Report Share Posted August 22, 2009 Ok, assuming you've changed nothing in your advanced settings...When you set upload speed to unlimited, uTorrent starts allowing far more upload slots at once.(Yet for some reason the same doesn't happen when you have upload speed set too high...odd!)If you have uTP peers/seeds connected to you, then upload speed may be unreliable due to uTorrent making very poor estimates of available max upload speed.That probably confirms it's a uTorrent bug...but WHAT version of uTorrent is this? Link to comment Share on other sites More sharing options...
bugmenot Posted August 23, 2009 Author Report Share Posted August 23, 2009 I'm experiencing this with 1.8.4... I can't check the exact build version, but I installed it the day before I made this thread. Well, the thread that got merged with this one anyway. Link to comment Share on other sites More sharing options...
DreadWingKnight Posted August 23, 2009 Report Share Posted August 23, 2009 I can't check the exact build versionNot even by checking Help - About? Link to comment Share on other sites More sharing options...
bugmenot Posted August 23, 2009 Author Report Share Posted August 23, 2009 No, I meant I'm not at home and won't be until Thursday. Link to comment Share on other sites More sharing options...
Switeck Posted August 23, 2009 Report Share Posted August 23, 2009 We need to know if uTP and/or Teredo/IPv6 seeds/peers were present when it was happening...because uTorrent v1.8 and later tries to regulate its speed using them. (...and sometimes does it extremely badly!) Link to comment Share on other sites More sharing options...
bugmenot Posted August 27, 2009 Author Report Share Posted August 27, 2009 Alright, it's µTorrent 1.8.4, build 16150. There's plenty of uTP peers, and plenty of IPv6 peers (also IPv6 peers using uTP) when this issue occurs.When I completely disable uTP (bt.transp_disposition = 5) and remove the upload limit, there's still some slowdown (~100 KB/s). Guess I'll blame that on the IPv6 peers. It's way faster than with uTP enabled though.When I use the default settings (TCP + incoming uTP), I notice some slowdown after a while, probably when the first uTP peers connect. Link to comment Share on other sites More sharing options...
Switeck Posted August 27, 2009 Report Share Posted August 27, 2009 I would expect upload speed to be fastest WITH a set max limit AND no uTP or IPv6 peers.If the upload speed tries to exceed what the ISP is giving you, the modem and/or ISP will be destroying random packets...perhaps even more than necessary...to keep you under max. If the packets destroyed happen to be needed to maintain speed (SYN/ACK packets), speeds plummet. Link to comment Share on other sites More sharing options...
flyz Posted August 28, 2009 Report Share Posted August 28, 2009 I don't mean to hijack this thread but I'm having the exact opposite problem bugmenot is having. I wrote about this awhile ago but got zero answers. This only seems to happen when there's only 1 peer downloading the torrent. I can't upload at the upload limit I set it to, usually anything above 30Kb. The most I can upload to a single peer is 10-30Kb. But if I change the upload limit to unlimited it will begin uploading at my max limit, most of the time. If there's more than one peer downloading the torrent the speed will go up quickly. This happens whether I'm a seeder or superseeder. It didn't used to do this before but I can't figure out what changed. Link to comment Share on other sites More sharing options...
bugmenot Posted August 28, 2009 Author Report Share Posted August 28, 2009 OK, but what exactly is happening here, and how can I avoid it?I noticed that even with a set limit that I know my connection can handle, upload speed degrades over time, it just takes longer. For example, when I set the limit to 100 KB/s and come back two hours later, it's uploading at 80 KB/s. Link to comment Share on other sites More sharing options...
Switeck Posted August 28, 2009 Report Share Posted August 28, 2009 flyz, known bug:http://forum.utorrent.com/viewtopic.php?id=56897bugmenot,If the peer count is low, when peers complete...the others may not be able or willing to download faster than 80 KB/sec in total. Link to comment Share on other sites More sharing options...
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