Capt.Beefheart Posted March 22, 2005 CID Share Posted March 22, 2005 help I have a funny problem. I have a cable connection whihc is connected to the local gateway via a wireless unit on the top of my apartment building. It is rated at 256 kbps and I used to get abot 240 kbps. I always used testmy.net for the speed check then I stumbled upon and installed Cablenut. The RWIN calculator on the link given by VanBuren wasnt working so I put in my own value and I was getting about 281 kbps Then my connection had some connectivity problem (local I am sure) so I had removed the tweaks and reinput them yesterday using the default settings of Cable_DSL 1500_256. Now the funny thing, on tesing I am getting: :::.. Download Stats ..::: Connection is:: 272 Kbps about 0.3 Mbps (tested with 579 kB) Download Speed is:: 33 kB/s Tested From:: http://www.testmy.net/ Test Time:: Wed Mar 23 01:56:59 UTC+0530 2005 Bottom Line:: 5X faster than 56K 1MB download in 31.03 sec Diagnosis: Awesome! 20% + : 172 % faster than the average for host I use GetRight for downloading stuff now but that doesnt show accurate download speeds but it keeps fluctuating showing 0 KB/s then 22.3 KB/s etc earlier it used to show constant values and give stable downloads. Is it because of the registry tweak? Should I remove the cablenut settings? anything I can change? Also how can I calculate accurate RWIN? Link to comment Share on other sites More sharing options...
VanBuren Posted March 22, 2005 CID Share Posted March 22, 2005 hey Capt.Beefheart and welcome to the forum i would keep the cablenut settings as you had them and got 281 Kbps i do not know your cap, but when calculating a RWIN with wireless you probl need to use a high latency quote from http://forums.speedguide.net/showthread.php?t=73799 "TcpWindowSize (RWIN) FORMULA (Maximum Bandwidth x Maximum Anticipated Latency) / 8 Example of a connection with a 3000 download cap with a maximum latency of 100 ms: (3000 x 100) / 8 = 37500 To make it a multiple of MSS divide by 1460: 37500 / 1460 = 25.68 Then round up to the nearest even whole number: 26 x 1460 = 37960 - Optimum RWIN" Anticipated Latency is the worst average ping you has to your gateway during downloading several files at the very same time I suggest a value of 250 ms or more for you VanBuren Link to comment Share on other sites More sharing options...
Capt.Beefheart Posted March 22, 2005 Author CID Share Posted March 22, 2005 Thanks VanBuren for the prompt reply. Funnily enough the settings I had used to get 281 were a mistake. since the RWIN link wasnt working I checked out the formula written in the page code which was i believe : [(Bandwidth(bytes)*Latency(ms))/MSS^0.5]*MSS I being the d00fus that I am while pinging took the TTL to be my latency which in this case was 30 and so I put in that value. So if I get your formula right my RWIN should be : (Bandwidth*Latency)/8/MSS then round off then *MSS so in this case (256*250)/8=8000/1460=5.479 then 6*1460=8760 should be my RWIN? Is that right? Also why the pulsing of the bandwidth the bandwidth meter in my GetRight window looks like an EKG full of spikes not a continuous stream of high speed goodness Cheers Link to comment Share on other sites More sharing options...
VanBuren Posted March 22, 2005 CID Share Posted March 22, 2005 that is correct i made a cablenut file with 8760 as RWIN the pulsing is probl cos you hit cap and start to get packetloss VanBuren Link to comment Share on other sites More sharing options...
Capt.Beefheart Posted March 22, 2005 Author CID Share Posted March 22, 2005 Thats really cool of you. Thanks for taking the trouble to set and post the file. Cheers mate Link to comment Share on other sites More sharing options...
pitbull481 Posted March 23, 2005 CID Share Posted March 23, 2005 Welcome to the Forum Capt.Beefheart post an upload test Link to comment Share on other sites More sharing options...
Capt.Beefheart Posted March 23, 2005 Author CID Share Posted March 23, 2005 Hi Pitbull! Here are my latest stats after putting in Van Buren's ccs file :::.. Upload Stats ..::: Connection is:: 114 Kbps about 0.1 Mbps (tested with 97 kB) Upload Speed is:: 14 kB/s Tested From:: http://www.testmy.net/ Test Time:: Wed Mar 23 09:43:02 UTC+0530 2005 Bottom Line:: 2X faster than 56K 1MB upload in 73.14 sec Diagnosis: Awesome! 20% + : 39.02 % faster than the average for host :::.. Download Stats ..::: Connection is:: 258 Kbps about 0.3 Mbps (tested with 579 kB) Download Speed is:: 31 kB/s Tested From:: http://www.testmy.net/ Test Time:: Wed Mar 23 09:46:15 UTC+0530 2005 Bottom Line:: 5X faster than 56K 1MB download in 33.03 sec Diagnosis: Awesome! 20% + : 141.12 % faster than the average for host I do get slightly different numbers if i test consecutively, i think its because of that pulsing phenomenon I mentioned earlier. Is the packet loss gonna be a problem? I think on average my connection is running faster but before putting in the tweaks, I was getting around 220-240 Kbps constant. Any way to get around the spiking? Cheers Link to comment Share on other sites More sharing options...
VanBuren Posted March 23, 2005 CID Share Posted March 23, 2005 i would leave the settings as you have them now, there is no way to get rid of spiking VanBuren Link to comment Share on other sites More sharing options...
DaveMan Posted April 14, 2005 CID Share Posted April 14, 2005 :::.. Upload Stats ..::: [table]Connection is:: 114 Kbps about 0.1 Mbps (tested with 97 kB) Upload Speed is:: 14 kB/s Tested From:: http://www.testmy.net/ Test Time:: Wed Mar 23 09:43:02 UTC+0530 2005 Bottom Line:: 2X faster than 56K 1MB upload in 73.14 sec Diagnosis: Awesome! 20% + : 39.02 % faster than the average for host :::.. Download Stats ..::: Connection is:: 258 Kbps about 0.3 Mbps (tested with 579 kB) Download Speed is:: 31 kB/s Tested From:: http://www.testmy.net/ Test Time:: Wed Mar 23 09:46:15 UTC+0530 2005 Bottom Line:: 5X faster than 56K 1MB download in 33.03 sec Diagnosis: Awesome! 20% + : 141.12 % faster than the average for host u said u had a cable connection, why are your speeds so low? Link to comment Share on other sites More sharing options...
DaveMan Posted April 14, 2005 CID Share Posted April 14, 2005 sorry, I was talking to capt.beefheart Link to comment Share on other sites More sharing options...
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