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das_leid n00b
Joined: 11 Apr 2004 Posts: 63 Location: Bochum / Germany
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Posted: Mon Oct 31, 2005 8:37 am Post subject: Re: Performance Tips for Kernel 2.6 |
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wgi wrote: | No. I get 10.5 - 11 MB/s between our Servers/Workstations (Full Duplex). |
I realized that too. NFS and SAMBA is way faster. But I wonder: Do you consider a 2*550 Mhz Server too slow for SSH and SCP ? Hmm, need to check that with my 1.6ghz notebook and my 1.5 ghz amd.
Cheers,
Das_Leid _________________ emerge vim
OH EVIL ! |
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frilled Retired Dev
Joined: 15 Mar 2004 Posts: 386 Location: Atlantis, inner city ring
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Posted: Mon Oct 31, 2005 9:21 am Post subject: Re: Performance Tips for Kernel 2.6 |
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Quote: | I realized that too. NFS and SAMBA is way faster. But I wonder: Do you consider a 2*550 Mhz Server too slow for SSH and SCP ? Hmm, need to check that with my 1.6ghz notebook and my 1.5 ghz amd. |
SMB sucks Royal Arse. I used it. It sucks. Now I use shfs for everything between the Linuxes. I'll have to get rid of the samba daemons, too, since it still doesn't work reliably in a Windoze 2003 domain environment. Guess I'll have to install Cygwin on all Windoze servers _________________ "Failure is not an option!"
"Sir, we are out of further options." |
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Monkeh Veteran
Joined: 06 Aug 2005 Posts: 1656 Location: England
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Posted: Mon Oct 31, 2005 1:13 pm Post subject: Re: Performance Tips for Kernel 2.6 |
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das_leid wrote: | PS: NEVER EVER I am going to use a 3com 3c905B-TX in my network. They play ping-pong with your interrupts and effectively increase your RX error rate. |
B as in Boomerang? I know how you feel. My home server has one built in and it likes to screw with me. |
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tSp Apprentice
Joined: 19 Jan 2004 Posts: 214 Location: Maysville, KY
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Posted: Mon Oct 31, 2005 11:12 pm Post subject: Re: Performance Tips for Kernel 2.6 |
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wgi wrote: | Quote: | Well, I'd like to say thanks. Using your guide my overall network performance increased from 2.9MB/s to 6.6MB/s.
I wonder if this is the practical maximum of a SCP connection in a 100Mbit network?!
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No. I get 10.5 - 11 MB/s between our Servers/Workstations (Full Duplex). But you need some horsepower for ssh. Since there's virtually nothing slower than 2.4 GHz x86 (at least of those who speak ssh I almost always get full speed. But with a slow machine the protocol and encryption becomes the bottleneck. |
a little off topic for the thread, but when using scp you can get much faster speeds by using blowfish, i.e.
# scp -c blowfish file user@host:/directory _________________ tSp
http://www.rhpstudios.com
http://www.xtremewebhosts.com
http://www.maysville-linux-users-group.org
http://www.edwiget.name
Registered Linux User #162711 |
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JATMAN Tux's lil' helper
Joined: 08 Aug 2002 Posts: 85 Location: Delaware, USA
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Posted: Tue Nov 15, 2005 1:45 am Post subject: |
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I had the same problem with a big slowdown after upgrading to the 2.6.14 kernel. Unsetting SMP solved the problem for me too. Thanks! This thread helped me a lot.
JATMAN _________________ Tyan (S2932)
Dual Opteron 2344HE quad-core processors
8GB RAM
Four 500GB SATA-II drives (7200 RPM) - RAID 0
3ware 9650SE controller |
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brazzmonkey Guru
Joined: 16 Jan 2005 Posts: 372 Location: between keyboard and chair
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Posted: Tue Jan 24, 2006 8:45 pm Post subject: |
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great tips !! my system doesn't lag any more ! though there are a few options i couldn't find.
thanks !! |
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halfgaar l33t
Joined: 22 Feb 2004 Posts: 781 Location: Netherlands
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Posted: Tue Jan 24, 2006 11:46 pm Post subject: |
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Whatever I do, my system keeps lagging too much. Every minute or so it hangs for 0.5 sec. In games this is particularly annoyting. Things like cron, or regular-interval mailcheckers are suspect here, but disabling them doesn't help. Also, I find it rather low-tech that any task can lock up my system that hard for a time.
Well, I guess when my new AMD dual core arrives, it'll all be better |
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purpler n00b
Joined: 11 Jan 2007 Posts: 38 Location: /v*/l*/p*/world
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halfgaar l33t
Joined: 22 Feb 2004 Posts: 781 Location: Netherlands
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Posted: Fri Jun 22, 2007 12:47 pm Post subject: |
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A reply to an old thread
By now, I have that dual core Athlon X2, and it's indeed all better. I still think it shouldn't have happened on my old machine, but it's no longer really relevant. I do believe that my kernel config was proper BTW. I've gone by every option mentioned in kernel performance threads, and I pretty much know what I'm doing.
The problem may also have been just the mouse movement. My mouse is USB and USB doesn't have a very high interrupt priority. There is a reason the keyboard interrupt is the highest, besides the timer. It's pretty strange that we nowadays have an input device on one of the lowest priorities. _________________ Linux backups the right way.
Get surround sound working. |
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P0w3r3d n00b
Joined: 13 Jan 2005 Posts: 54
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Posted: Sat Nov 14, 2009 2:18 pm Post subject: |
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any updates??? there are many improvements into the kernel code.. this is the same?? |
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