Strange speed fluctuation using usenet

February 13, 2010 at 08:07:32
Specs: Windows 7, 3.42 GHz / 3069 MB
Hi,

My ISP provides me with 60Mbit/s (7,5MB/s)
Speedtests give a a speed of 58mbps so thats good..

Now, i have a usenet account from Download2Day.nl of 120mbps, when downloading in Alt.Binz i get some really wierd downloading speed fluctuations, it fluctuates bitween ~3000kbps and ~6800kbps

It looks like this:
http://img94.imageshack.us/img94/18...

I have no idea how this happens, is my ISP to blame? usenet account? router? Plz Help!

btw, router is a Netgear WNR2000


Thanks in Advance!

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


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#1
February 13, 2010 at 08:43:53
My ISP provides me with 60Mbit/s

I doubt it very much 60 Mbs is way faster than any Internet speed I know of. Are you sure you are not reading your LAN speed which is a different thing altogether. The 5.685 Mbs a second indicated in your graph seems a lot more reasonable and is a reasonably fast Internet speed.

You will always get fluctuations in download speed when downloading large files. Don't forget that the Internet is a shared resource and you are sharing the available bandwidth with millions of other users. You don't have a dedicated link between you and the server, you have to wait your turn.

Stuart


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#2
February 13, 2010 at 08:51:31
I doubt it very much 60 Mbs is way faster than any Internet speed I know of.

http://www.upc.nl/internet/
..UPC FiberPower goes up to 120Mbps

But anyway, i restarted my pc and now the speed is alot more solid 6.6MB/s ~ 6.8MB/s
Would be nice to get the full 7.5MB/s though...

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


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#3
February 13, 2010 at 12:00:58
Ok this is very wierd...

I just noticed that this fluctuation in Alt.Binz (see link in op) is triggered when playing an mp3?? i tried both Windows Media Player & Winamp, the moment i hit the play button it starts fluctuating, the moment i hit stop my download speed is solid again..

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


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Related Solutions

#4
February 13, 2010 at 15:23:43
Sure that can happen , specially on older processors . I have seen that when on the web and even loading a graphics intense page the music will cut out for a few seconds .

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#5
February 13, 2010 at 16:03:30
Sure that can happen , specially on older processors

On a quad core?? i'm pretty sure my system is able to handle a single mp3 without any sacrifice...

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


Report •

#6
February 13, 2010 at 17:29:44
OK for anyone interested; i fixed the problem..

Turns out this has been a barely noticed problem which has been around since the release of Vista, and continued by Win 7, both OS's have a service called "Multimedia Class Scheduler" or "MMSCC"
Aparently this service seems to handle CPU priority issues when playing back multimedia, but also seems to do something to high packet receive rates in a network, drastically slowing them down, mostly noticed when transferring files via LAN or putting trough high bandwidth on few connections, like usenet...

As expected, turning off MMSCC fixes the problem i had..
This is how to turn it off:

Open regedit and go to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Audiosrv\
On the right plane double click "DependOnService" and only delete "MMSCC" from the key

The above is to stop mediaplayback being dependend on MMSCC to work

Now just stop "Multimedia Class Scheduler" in services (start, run, "services.msc") and also disable startup of the service, when disabling the MMSCC service, music might stop working, but will return after reboot.

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


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