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Post subject: SSH with kernel 2.6.26
 Posted: Aug 19, 2008 - 05:49 PM
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Joined: Aug 19, 2008
Posts: 1
Status: Offline
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Hi
Anyone else getting slow transfer speeds with the latest kernel?
Copying files to my server using scp with 2.6.25-9 amd64 i'm getting
2 Mb/s, but with 2.6.26-2 amd64 it drops to 250 kb/s.
My laptop has intel 3945 wireless, if this is an issue.
regards
PS! Been using XFCE-version for about a week now, and its really nice 
(ediited wrong kernel) |
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Post subject: SSH with kernel 2.6.26
Posted: Aug 25, 2008 - 11:29 AM
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Joined: Nov 30, 2006
Posts: 3465
Location: Budapest
Status: Offline
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Confirmed (same wirless chip), but I have to start to play with kernel versions again due to longer time offline (I love summer travels  ).
hubi |
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Bonitas stultitiaque sodales sunt.
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Post subject: SSH with kernel 2.6.26
Posted: Aug 25, 2008 - 04:06 PM
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Joined: Nov 30, 2006
Posts: 3465
Location: Budapest
Status: Offline
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Code:
$ uname -r
2.6.26-3.slh.1-sidux-686
With the newest kernel speed is up to around 600 KB/s compared to 2.3 MB/s with 2.6.25.
hubi |
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Bonitas stultitiaque sodales sunt.
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Post subject: SSH with kernel 2.6.26
Posted: Aug 29, 2008 - 11:06 AM
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Joined: Nov 30, 2006
Posts: 3465
Location: Budapest
Status: Offline
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Same slow behaviour on stock Debian 2.6.26 and experimental Debian 2.6.27-rc4. Next I try different wireless encryptions to see if it has something to do with that since this FC thread is the only discussion I found which might be related to this behaviour. No Debian reference anywhere it seems.
hubi |
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Bonitas stultitiaque sodales sunt.
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Post subject: SSH with kernel 2.6.26
Posted: Aug 29, 2008 - 12:16 PM
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Joined: Nov 30, 2006
Posts: 3465
Location: Budapest
Status: Offline
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No, it has nothing to do with wireless encryption. Using an unencrypted wireless network is equally slow with 2.6.26 and ssh. Esp. when pulling data from the notebook to a server (connecting from the server), then the speed difference is up to 10x (250 KB/s compared to 2,3 MB/s).
I am clueless and it is a showstopper because I use that connection for backups every day.
hubi |
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Bonitas stultitiaque sodales sunt.
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Post subject: SSH with kernel 2.6.26
Posted: Oct 18, 2008 - 04:15 PM
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Joined: Nov 30, 2006
Posts: 3465
Location: Budapest
Status: Offline
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A bit more infos on that:
- it is not just ssh, a samba connection is slow as well
- some improvement by totally disabling the ipv6 module (speed up to 1,4 MBps ... should be at least 2,5 MBps)
- same slowness with 2.6.27
- I cannot test the latest Windows driver here, it does not work with ndiswrapper
This is how to totally disable ipv6 on boot time:
Code:
echo "blacklist ipv6" >> /etc/modprobe.d/blacklist
hubi |
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Bonitas stultitiaque sodales sunt.
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